What is the relationship between temperature and pressure?
Write your own response in your own words.
Answers
Answer:
Pressure is the force per unit area pounded onto the surface of a container of a gas or liquid. It's interesting to notice that the units of pressure (force/area) are the same as the units of energy density (energy/volume). This gives rise to the interesting result that the pressure at the centers of stars that we think should be sustaining the star against collapse actually attracts more pressure, at high enough pressures, and contributes to collapse
Explanation: this is what i would put ^-^
Related Questions
Which number on the diagram is labeling the large intestine?
a. 4
b. 5
c. 2
d. 3
Answers
Answer:
5 would be the large intestine
Explanation:
true or false: when carbon dioxide dissolves in rainwater carbonic acid forms which raises the ph of rainwater above 7.0
Answers
True when carbon dioxide dissolves in rainwater carbonic acid forms which raises the ph of rainwater above 7.0
When carbon dioxide dissolves in rainwater, it forms carbonic acid. This lowers the pH of the rainwater, making it more acidic than 7.0. However, over time, the carbonic acid reacts with minerals in the soil, neutralizing its acidity and bringing the pH closer to neutral.
When carbon dioxide dissolves in rainwater, it forms carbonic acid which lowers the pH of the rainwater. This is because carbonic acid is a weak acid that can dissociate to form hydrogen ions (H+) and bicarbonate ions (HCO3-), which increase the acidity of the solution. As a result, the pH of rainwater can drop below 7.0. However, this acidity is temporary as carbonic acid eventually reacts with minerals in the soil to neutralize its acidity.
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(8.5a) Which of the following elements contains the greatest amount
of protons? *
A. Chlorine
B. Hydrogen
C. Oxygen
D. Sulfur
Answers
Answer:
A. Chlorine
Explanation:
Chlorine has 17, Hydrogen has 1, Oxygen has 8, Sulfur has 16.
what is the percent yield if the combustion of gasoline results in 680 grams of steam produced when a theoretical yield is 985 grams of steam?
Answers
Answer:
69%
Explanation:
Percent yield = ?
Theoretical yield = 985 grams
Experimental Yield = 680 grams
Percent Yield = Experimental Yield / Theoretical Yield * 100
Percent Yield = 680 / 985 * 1 00
Percent Yield = 0.690 * 100 = 69%
Contrast ionization energy from electron affinity.
Answers
Answer:
Ionization energy : energy required to take out an electron from the valance orbital of an atom.
Electron affinity: electron affinity of an atom measures the amount of energy released when an electron is forcibly entered or pushed into the valence orbital of an atom.
Ionization energy is the energy required to make an atom into a positive ion. Electron affinity is the energy released when an atom becomes a negative ion.
ionization energy is what is required to remove one electron from a normal gaseous atom to produce a +1 anion of that atom.
electron affinity is the energy required to remove one electron from a gaseous -1 anion of an atom to produce a normal gaseous atom.
Calculate the osmotic pressure of a 9.45 mM aqueous solution of MgCl2 at 20 degrees Celsius?
Answers
The osmotic pressure of the 9.45 mM aqueous solution of MgCl₂ at 20 degrees Celsius is approximately 0.2336 atm.
To calculate the osmotic pressure of a solution, we can use the equation;
π = MRT
Where:
π = osmotic pressure (in pascals or N/m²)
M = molarity of solution (in mol/L or M)
R = ideal gas constant (8.314 J/(mol·K) or 0.0821 L·atm/(mol·K))
T = temperature (in Kelvin)
First, we need to convert the given concentration of MgCl₂ from millimolar (mM) to molarity (M). Since 1 mM = 0.001 M, the concentration becomes;
M = 9.45 mM × 0.001 = 0.00945 M
Next, we will convert the temperature from Celsius to Kelvin:
T = 20 + 273.15=293.15 K
Now we calculate the osmotic pressure;
π = (0.00945 M) × (0.0821 L·atm/(mol·K) × (293.15 K)
Simplifying the equation;
π = 0.2336 atm
Therefore, the osmotic pressure of the 9.45 mM aqueous solution of MgCl₂ at 20 degrees Celsius is approximately 0.2336 atm.
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Why does every chemical reaction require a certain amount of activation energy?
A Energy is released when the reactants begin to react.
B. Energy lost to the environment during the reaction must be replaced.
C. Forming the activated complex requires energy.
D. The products have more potential energy than the activated complex.
E. The reactants have less potential energy than the products.
Answers
Answer: C
Explanation:
Which of the following functional group(s) contains at least 1 pi bond? (choose all that apply)
a. Alkane
b. Alkene
c. Alkyne
d. Alcohol
e. Ether
f. Ester
g. Carboxylic acid
h. Aldehyde
Answers
Answer: The correct options are options B,C,F,G and H. All these groups
contain a double bond and hence a pi bond.
Explanation:
Side-on overlaps of orbitals result in pi bond formation. It usually formed by p orbitals although d orbitals can also form them. The 2p orbital of carbon is capable of forming pi bonds and its 2p electrons are used in double bonds or triple bonds. Ether,Alkane,Alcohol are saturated hydrocarbons i.e. without double or triple bonds. Hence, rest of the molecules such as alkene,alkyne,ester, carboxylic acid and aldehyde contain atleast 1 pi bond.
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which of the following represents a polar covalent bond
A. O-O
B. Ca-O
C. H-C1
D. H-S
Answers
Answer:
The one that represents a polar covalent bond is: B. H-S
An oil refinery finds that it is necessary to treat the waste liquids from a new process before discharging them into a stream. The treatment will cost $30,000 the first year, but process improvements will allow the costs to docline by $3,000 each year. As an alternative, an outside company will process the wastes for the fixed price of $15,000/year throughout the 9 year period, payable at the beginning of each year. Either way, there is no need to treat the wastes after 9 years. Using the AW method, calculate the equivalent uniform annual cost (EUAC) of each alternative and determine how the waste should be processed. The company's MARR is 8%. Click the icon to view the interest and annuity table for discrete compounding when the MARR is 8% per year. The EUAC for in-house treatment is $ (Round to the nearest dollar.) The EUAC for outside treatment is $ (Round to the nearest dollar.) The processing is the most economical alternative.
Answers
For outside treatment:
The cost is a fixed $15,000 per year for the entire 9-year period.
Therefore, the EUAC for outside treatment is simply $15,000.
Comparing the EUAC values, we find that the EUAC for in-house treatment is approximately $6,329, while the EUAC for outside treatment is $15,000.
To calculate the equivalent uniform annual cost (EUAC) of each alternative and determine the most economical option, we need to analyze the costs over the 9-year period.
For in-house treatment:
The cost in the first year is $30,000, and the cost declines by $3,000 each year. We can use the arithmetic gradient formula to calculate the equivalent uniform annual cost.
Using the formula for an arithmetic gradient, the EUAC for in-house treatment can be calculated as follows:
EUAC = C - (G/A) * (1 - (1 + i)^(-n))
Where:
C = Initial cost = $30,000
G = Gradient (decrease per year) = -$3,000
A = Annuity factor (obtained from the interest and annuity table for discrete compounding) for 9 years at 8% MARR = 6.71008 (rounded)
i = Interest rate = 8% = 0.08
n = Number of years = 9
Substituting the values into the formula:
EUAC = $30,000 - (-$3,000/6.71008) * (1 - (1 + 0.08)^(-9))
EUAC ≈ $6,329 (rounded)
For outside treatment:
The cost is a fixed $15,000 per year for the entire 9-year period.
Therefore, the EUAC for outside treatment is simply $15,000.
Comparing the EUAC values, we find that the EUAC for in-house treatment is approximately $6,329, while the EUAC for outside treatment is $15,000.
Since the EUAC for in-house treatment is lower, it is the more economical alternative for processing waste liquids.
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What do these have in common: iron (Fe), cells, and air ?
Answers
Answer:
Explanation:
Iron (Fe) is a common element that is found in the human body and is essential for the formation of red blood cells Cells are the basic building blocks of life and are found in all living organisms Air is a mixture of gases that is essential for life and contains oxygen which is required for the process of respiration
Iron (Fe) also plays a role in iron-air batteries where the power comes from the interaction of iron with oxygen. The steel oxidizes nearly exactly as it would during its corrosion phase within that procedure. The oxygen necessary for the reaction may be taken from the ambient air, eliminating the requirement for the cell to store it
describe the essential features of an experimental apparatus that could be used to measure oxygen consumption
Answers
A respirometer is a device used to measure the price of breathing of a living organism by using measuring its rate of change of oxygen and/or carbon dioxide.
Considering that CO2 is eliminated with the aid of KOH, the alternate in the quantity of gasoline within the tube will be at once associated with the quantity of oxygen consumed.
Oxygen consumption is generally measured with respirometers. All respirometers are based totally on strategies that degree the charge at which cells soak up oxygen. this could be carried out at once by using measuring the fee at which biomass takes up dissolved oxygen (DO) from the liquid or circuitously by using measuring gaseous oxygen.
Repsirometer for evaluating the quotes of absorption or evolution of gases by small organisms, at some stage in breathing. The equipment consists of stoppered boiling tubes connected via three-way faucets to either limb of a graduated manometer.
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Disclaimer:- your question is incomplete, please see below for the complete question.
Describe the essential features of the experimental apparatus that could be used to measure oxygen consumption by a small organism. Explain why these features are necessary.
Explain the role of photosynthesis in the cycling of matter between the plant and the person?
Answers
The process of photosynthesis converts light energy into stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.
What is photosynthesis ?Utilizing a process called photosynthesis, plants and other living things may transform light energy into chemical energy that can then be released through cellular respiration to power their activities. Photosynthesis, from the Greek phs (light) and synthesis (putting together), derives from the fact that some of this chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are created from carbon dioxide and water.
Photoautotrophic organisms, such as the majority of plants, algae, and cyanobacteria, carry out photosynthesis. The majority of the energy required for life on Earth is produced and maintained through photosynthesis, which is also primarily responsible for producing and maintaining the oxygen concentration of the Earth's atmosphere.
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Using Appendix D, calculate the molar solubility of AgBr in (a) pure water, (b) 3.0×10−2MAgNO3 solution, (c) 0.10M NaBr solution.
Answers
Using Appendix D, the molar solubility of AgBr is approximately 5.0 × 10^(-3) M in (a) pure water, (b) 3.0 × 10^(-2) M AgNO3 solution, and (c) 0.10 M NaBr solution.
(a) Pure Water:
The solubility product constant (Ksp) for AgBr is given in Appendix D as 5.0 × 10^(-13). In pure water, no common ion is present. Since AgBr is a sparingly soluble salt, it dissociates as follows:
AgBr(s) ⇌ Ag+(aq) + Br-(aq)
Let's assume the molar solubility of AgBr is x.
Ksp = [Ag+][Br-] = x * x = x^2
Using the value of Ksp, we can set up the equation:
5.0 × 10^(-13) = x^2
Taking the square root of both sides:
x ≈ √(5.0 × 10^(-13)) ≈ 5.0 × 10^(-7) M
Therefore, the molar solubility of AgBr in pure water is approximately 5.0 × 10^(-7) M.
(b) 3.0 × 10^(-2) M AgNO3 solution:
In this case, AgNO3 is added, which provides Ag+ ions as a common ion. The presence of a common ion reduces the solubility of AgBr.
Assuming the molar solubility of AgBr in the presence of Ag+ is y, we can set up the equation:
Ksp = [Ag+][Br-] = (3.0 × 10^(-2) + y) * y
Since y is expected to be much smaller than 3.0 × 10^(-2), we can approximate (3.0 × 10^(-2) + y) as 3.0 × 10^(-2).
Plugging in the values of Ksp and (3.0 × 10^(-2) + y), we get:
5.0 × 10^(-13) = (3.0 × 10^(-2)) * y
Solving for y:
y ≈ (5.0 × 10^(-13)) / (3.0 × 10^(-2)) ≈ 1.7 × 10^(-12) M
Therefore, the molar solubility of AgBr in a 3.0 × 10^(-2) M AgNO3 solution is approximately 1.7 × 10^(-12) M.
(c) 0.10 M NaBr solution:
In this case, NaBr is added, which provides Br- ions as a common ion. The presence of a common ion reduces the solubility of AgBr.
Assuming the molar solubility of AgBr in the presence of Br- is z, we can set up the equation:
Ksp = [Ag+][Br-] = z * (0.10 + z)
Since z is expected to be much smaller than 0.10, we can approximate (0.10 + z) as 0.10.
Plugging in the values of Ksp and 0.10, we get:
5.0 × 10^(-13) = z * 0.10
Solving for z:
z ≈ (5.0 × 10^(-13)) / 0.10 ≈ 5.0 × 10^(-12) M
Therefore, the molar solubility of AgBr in a 0.10 M NaBr solution is approximately 5.0 × 10^(-12) M.
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According to the rules covered in this class, which of the following ionic compounds is named incorrectly?
cobalt(II) oxide
nickel(II) sulfide
copper(II) selenide
zinc(II) telluride
All of these names are correct.
Answers
Answer: is copper(ll)selenide
Explanation:
is copper (ll)selenide
i hope this help
zinc foil gas syringe hydrochloric acid A piece of zinc foil was added to 50 cm³ of hydrochloric acid, of concentration 2.0 mol/dm³. The acid was in excess. The hydrogen evolved was collected in the gas syringe and its volume measured every minute. The results were plotted and labelled as graph 1. graph 2 (with copper) volume Knowing that copper does not react with hydrochloric acid. 1. What may be the role of copper? Explain your answer. 2 time graph 1 2. Can you take copper metal from reaction 2 and use it in another reaction?
Answers
0.154g of \(H2\) First, we'll begin by writing a balanced equation for the reaction between zinc (\(Zn\)) and hydrochloric acid (\(HCl\)). This is illustrated below:
\(Zn +2HCl — > ZnCl2 + H2\)
Next, let us determine the mass of Zn that reacted and the mass of H2 formed from the balanced equation.
This is illustrated below:
Molar Mass of Zn = 65g/mol
Molar Mass of H2 = 2x1 =2g/mol
From the balanced equation above,
65g of Zn produced 2g and H2.
Therefore, 5g of Zn will produce = (5 x 2) /65 = 0.154g of H2
From the calculations made above, 5g of Zn produced 0.154g of H2
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Lighting a match is an example of what kind of energy conversion?
A. Chemical potential energy being converted to heat energy
B. Chemical potential energy being converted to kinetic energy
C. Gravitational potential energy being converted to heat energy
D. Kinetic energy being converted to chemical potential energy
Answers
Answer:
Mechanical Energy to Thermal Energy
When you strike a match, it moves through the air until it rubs against a surface. The rubbing produces the heat required to light the match. This is a transformation from mechanical energy to thermal (heat) energy.
Explanation:
Answer:
A is the answer.
Explanation:
Which term describes the degree to which an element attracts electrons?
A) Oxidation.
B) Reduction.
C) Electronegativity.
D) Polarity.
Answers
The term that describes the degree to which an element attracts electrons is Electronegativity.
Electronegativity describes the degree to which an element attracts electrons.
What is Electronegativity?
Electronegativity is a measure of an atom's attraction for the electrons it shares with another atom.
The electrons are drawn closer to the more electronegative atom, causing partial charges to occur.
Electronegativity can be used to predict which of the atoms will take on a partial negative charge and which will take on a partial positive charge when atoms with varying electronegativities bond covalently.
The difference in electronegativity between two atoms in a covalent bond can also be used to determine the bond type. When two atoms with identical electronegativities form a bond, they share the electrons equally, resulting in a nonpolar covalent bond.
A polar covalent bond is formed when two atoms with differing electronegativities share electrons unequally, with the more electronegative atom taking on a partial negative charge and the less electronegative atom taking on a partial positive charge.
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What is the number of significant figures in each of the following measured quantities? 0.0105 L.
Answers
The measured quantity 0.0105 L has three significant figures. Significant figures are the digits in a measurement that convey precision, excluding leading zeros and trailing zeros without a decimal point.
In the measured quantity 0.0105 L, there are three significant figures. Significant figures are the digits in a measurement that indicate the precision and reliability of the value. The general rule for determining significant figures is as follows:
1. Non-zero digits are always significant. In this case, the digits "1", "0", and "5" are all non-zero and therefore significant.
2. Leading zeros (zeros at the beginning of a number) are not significant; they act as placeholders. In this measurement, the leading zero before the decimal point is not considered significant.
3. Zeros between significant digits are significant. There are no zeros between the significant digits "1", "0", and "5" in this case.
4. Trailing zeros (zeros at the end of a number) after a decimal point are significant. In this measurement, the trailing zero after the "5" is significant.
By applying these rules, we can determine that the measured quantity of 0.0105 L has three significant figures, representing the precision of the measurement to the hundredth place.
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when was the element copper discovered? Who discovered the element copper?
Answers
The Mesopotamians discovered copper (Cu) in 9000 BC.
if we triple the temperature and double the volume, what would the new pressure of the system be?
Answers
That the pressure doubles when the gas's volume is cut in half.
If gas volume and temperature are maintained constant, the formula demonstrates that pressure and volume are inversely proportional.
This implies that if volume decreases, pressure must increase. This implies that if pressure doubles, volume must be half, and if pressure is halved, volume must be doubled in order to maintain the K value.
If the volume is doubled and the pressure is tripled, the effect on the temperature will be 3 2 = 6 times. This is because for perfect gases, the temperature is directly related to both the volume and the pressure.
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Name one star from the diagram that is fusing hydrogen into helium
Answers
Perform the following operation
and express the answer in
scientific notation.
2.589x106 : 3.687x105
?]
[ ? ]x10!
Х
Ilona
No links
![Perform the following operationand express the answer inscientific notation.2.589x106 : 3.687x105?][](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/Gha4I5GdFP8woTiT0fL1NL1NsJUWSKps.png)
Answers
Answer:
7.022
Explanation:
2.589x10^6/ 3.687x10^5
1. 2.589/3.687 = 0.702197 [Separate out and divide just the decimal portion first]
2. 10^6/10^5 = 10^(6-5) = 10^1 [Divide the exponent portion next] When dividing, subtract the denominator exponent from the numerator exponent: (6-5) = 1. The exponent is 1.
0.702197x10^1 [Put the two pieces together: 1. and 2.]
7.02197 [Move the decimal point once to the right, which will reduce 10^1 to 10^0, or 1]
7.02197 or 7.022 to 4 sig figs
The correct response to the problem in standard form is 7.023 * 10^0.
What is scientific notation?When a number is written in scientific notation, it has a base and an index. The number is multiplied by 10 raised to a given power.
In this case, we can see that the correct response to the problem in standard form is 7.023 * 10^0.
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Calculate 8D of water vapor in isotopic equilib- rium with fresh water whose 8D value is -65%0, assuming that a (liquid-vapor) = 1.090.
Answers
The value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.
The expression for calculating 8D of water vapor in isotopic equilibrium with fresh water can be given by: 8D = α 8D (vapor) + (1 - α) 8D (liquid). Where,α is a fractionation factor and 8D (vapor) and 8D (liquid) are the deuterium enrichments in water vapor and liquid, respectively.
The value of α is given by:a (liquid-vapor) = 1.090So,α = (a (liquid-vapor) - 1) / (a (liquid-vapor) + 1)α = (1.090 - 1) / (1.090 + 1)α = 0.045So,8D = α 8D (vapor) + (1 - α) 8D (liquid)Given,8D (liquid) = -65‰ (‰ denotes permil, which is equal to parts per thousand)
Substitute the given values in the expression and simplify:8D = 0.045 × 8D (vapor) + (1 - 0.045) × (-65)8D = 0.045 × 8D (vapor) - 61.9258D + 2.79125 = 8D (vapor)
Therefore,8D (vapor) = 8D - 2.79125= -65 - 2.79125= -67.79125‰ (answer)Therefore, the value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.
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if 6 moles of a a compound produce 84 J of energy, what is the h reaction in j/mol
Answers
The enthalpy of the reaction is 14 J/mol.
The enthalpy of a reaction (ΔH) is the amount of energy transferred between a system and its surroundings during a chemical reaction at constant pressure, measured in joules per mole (J/mol). This value is important because it can tell us whether a reaction is exothermic or endothermic, as well as give us information about the strength of chemical bonds within the reactants and products.To calculate the enthalpy of a reaction, we need to know the amount of energy released or absorbed (Q) and the number of moles of the compound involved in the reaction (n). We can use the equation:
ΔH = Q/n
Given that 6 moles of a compound produce 84 J of energy, we can calculate the enthalpy of the reaction as follows:
ΔH = Q/n
ΔH = 84 J / 6 mol
ΔH = 14 J/mol
This means that for every mole of the compound involved in the reaction, 14 J of energy is transferred between the system and the surroundings. Since the value is positive, we can conclude that the reaction is endothermic, meaning that it requires an input of energy to occur.It is worth noting that the enthalpy of a reaction can depend on a number of factors, such as temperature, pressure, and the specific conditions under which the reaction occurs. As such, it is important to take these factors into account when calculating or predicting enthalpy values.
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Which equation is derived from the combined gas law?
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
StartFraction V subscript 1 over T subscript 2 EndFraction equals StartFraction V subscript 2 over T subscript 1 EndFraction.
V subscript 1 T subscript 1 equals P subscript 2 T subscript 2.
P subscript 1 V subscript 1 T subscript 1 equals P subscript 2 V subscript 2 T subscript 2.
Answers
The equation derived from the combined gas law is option D: P₁V₁T₁ = P₂V₂T₂. Option D
The combined gas law combines Boyle's law, Charles's law, and Gay-Lussac's law into a single equation that relates the pressure, volume, and temperature of a gas sample. It allows us to analyze changes in these variables while keeping the amount of gas constant.
Boyle's law states that at a constant temperature, the pressure and volume of a gas are inversely proportional. In other words, if the volume of a gas decreases, its pressure increases, and vice versa. This is expressed as P₁V₁ = P₂V₂.
Charles's law states that at a constant pressure, the volume and temperature of a gas are directly proportional. If the temperature of a gas increases, its volume increases, and vice versa. This is expressed as V₁/T₁ = V₂/T₂.
Gay-Lussac's law states that at a constant volume, the pressure and temperature of a gas are directly proportional. If the temperature of a gas increases, its pressure increases, and vice versa. This is expressed as P₁/T₁ = P₂/T₂.
By combining these three laws, we obtain the combined gas law equation: (P₁V₁)/T₁ = (P₂V₂)/T₂. To eliminate the division, we can cross-multiply to get P₁V₁T₂ = P₂V₂T₁, which can be rearranged as P₁V₁T₁ = P₂V₂T₂.
This equation allows us to calculate the final values of pressure, volume, or temperature when any two of these variables change while the amount of gas remains constant. It is particularly useful in analyzing the behavior of gases under different conditions or when studying gas systems.
Option D
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Answer:
it was A for me.. don't know if this will help
Explanation:
How many number of orbitals are in Potassium (K)?
1s^2 2s^2 2p^6 3s^2 3p^6 4s^1
Answers
Explanation:
Each orbital can only carry at most 2 electrons wih opposite spins.
The first 3 shells are fully filled, giving 9 orbitals.
There is an extra electron in 4s, which gives another orbital. (even though it is not filled yet)
Hence there are 10 orbitals.
nếu có 40g dung dịch NaOH 20% phairn dùng hết bao nhiêu gam dung dịch HCl 25% để trung hoà
Answers
Answer:
nếu có 40g dung dịch NaOH 20% phairn dùng hết bao nhiêu gam dung dịch HCl 25% để trung hoà
The following model was used to show a molecule of methane, or CH4. Describe the number and type of each atom of the molecule. Fill blank boxes with the right answer. The blue sphere represents atom(s) of the element The red sphere represents atom(s) of the element
Answers
Answer:
Also attached model picture
Explanation:
This question is incomplete because it does not include the image of the model. But it can be answered based on my previous knowledge.
A CH4 atom has 4 hydrogen atoms and 1 carbon atom.
Methane is a chemical compound classified as a hydrocarbon whose chemical formula is CH4. This compound is found in nature in the form of a gas and has no odor or color. It originates as a result of the decomposition of plants.
According to its chemical formula CH4, it can be inferred that methane is made up of one carbon atom and four hydrogen atoms.
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Why do we need to use moles when we try to determine amounts of reactants and products in a reaction?.
Answers
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Chemists use the mole unit to represent 6.022 × 10 23 things, whether the things are atoms of elements or molecules of compounds. This number, called Avogadro's number, is important because this number of atoms or molecules has the same mass in grams as one atom or molecule has in atomic mass units.
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