Answers
Density is a measure of the mass of a substance per unit volume. It is calculated by dividing the mass of the substance by its volume. For example, if you have a block of aluminum that has a mass of 40 grams and a volume of 10 cubic centimeters, the density of the aluminum block would be calculated as follows:
Density = mass / volume
= 40 grams / 10 cubic cm
= 4 g/cm^3
The unit for density is typically expressed in grams per cubic centimeter (g/cm^3) for solids and grams per milliliter (g/mL) for liquids.
Related Questions
What term describes the ability of something to float on water
A) density
B) buoyancy
C) magnetism
D) solubility
Answers
Answer: (B) Buoyancy
Explanation: Buoyant force is an upward force that fluids exert on any object that is placed in them. The ability of fluids to exert this force is called buoyancy
Answer:
\(\boxed {\tt B. \ Buoyancy}\)
Explanation:
Let's define each answer choice.
A. Density
The amount of mass in a certain spaceB. Buoyancy
The tendency of an object to float on a fluid/waterC. Magnetism
The ability of objects to product attracting or repulsing fieldsD. Solubility
The ability to dissolveThe definition that matches "the ability for something to float on water" is buoyancy. Therefore, the correct answer is B. Buoyancy
if 3 moes of cl reacts with 3 moles oxygen, then which substance is the limitting reactant and excess reactant
Answers
If 3 moles of cl reacts with 3 moles oxygen, there is no limiting reactant or excess reactant because the reactants are in stoichiometric proportions.
To determine the limiting reactant and excess reactant, we need to compare the stoichiometry of the reaction to the given amounts of each reactant.
The balanced chemical equation for the reaction between chlorine (Cl2) and oxygen (O2) can be represented as follows:
2Cl2 + O2 → 2Cl2O
According to the balanced equation, it requires 2 moles of chlorine (Cl2) to react with 1 mole of oxygen (O2) to produce 2 moles of chlorine oxide (Cl2O).
Given that we have 3 moles of chlorine (Cl2) and 3 moles of oxygen (O2), we can determine the limiting reactant by comparing the ratio of moles between the two reactants.
The ratio of Cl2 to O2 required for complete reaction is 2:1. However, since we have equal amounts of Cl2 and O2 (both 3 moles), neither reactant is present in excess.
Therefore, in this scenario, there is no limiting reactant or excess reactant because the reactants are in stoichiometric proportions. All of the chlorine and oxygen will be consumed in the reaction, resulting in the complete conversion to chlorine oxide (Cl2O).
It's important to note that if the amounts of Cl2 and O2 were different, the reactant present in lesser quantity would be the limiting reactant, and the reactant in greater quantity would be the excess reactant.
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The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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Which of the following atoms is smallest? Vanadium, Chromium or Tungsten
Which has the highest ionization energy?
Answers
Vehicle air bags require that a very specific amount of gas is created so that the gas inflates the airbag without causing it to rupture.
Commonly, this is accomplished by decomposing sodium azide (NaN3) to produce sodium metal and nitrogen gas. How much sodium azide is required to produce 80.0 g of nitrogen gas?
Answers
The amount of sodium azide required will be 123.72 grams
Stoichiometric problemFrom the equation of the reaction below:
\(2NaN_3 --- > 2Na + 3N_2\)
The mole ratio of sodium azide to nitrogen gas is 2:3
Mole of 80.0 g nitrogen = 80/28.02 = 2.855 moles
Equivalent mole of sodium azide = 2/3 x 2.855 = 1.903 moles
Mass of 1.903 moles sodium azide = 1.903 x 65 = 123.72 grams
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What is the meaning of reference point?
Answers
Answer:
Reference point, or frame of reference, a system of geometric axes in relation to which measurements of size, position, or motion can be made. Reference point, a geometrical point used to define the location of another point
Explanation:
Which phrase best describes nuclear fusion? ( 1 point)
The process by which small nuclei combine into a larger nucleus
A series of reactions in which particles from one reaction trigger the next reaction
The spontaneous emission of radiation from an unstable nucleus
The process by which a large nucleus is divided into smaller nuclei
Answers
Answer:
Nuclear fusion is a kind of nuclear reaction in which two lighter nuclei combine under suitable conditions to form heavier nuclei under suitable conditions
Explanation:
Let us define what Nuclear fusion is
Nuclear fusion occur as a result of two or more atoms coming together to form a more complex or a different atom entirely, and after the process, energy is released or absorbed.
From the given options, the correct answer is
The process by which small nuclei combine into a larger nucleus
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What consist of a solid matter?
Answers
There are atoms that are close together, restricting their movement causing them to vibrate at a rapid speed.
I need help with this
Answers
As a result, the ideal gas law is applied, and the pressure of the gas in the container is 1.44 atm.
How does Charles Law compute pressure?The Kelvin temperature and hence the volume are going to be in direct proportion when the pressure on a sample of a dry gas is held constant, according to the definition of the Charles Law Formula. PV = k is the law's equation, and k might be a constant.
This issue can be resolved by applying the ideal gas law:
PV = nR
T = -52 °C + 273.15 = 221.15 K
n = 0.642 mol
V = 8.6 L
T = 221.15 K
\(R = 0.0821 L·atm/mol·K (gas constant for ideal gases)\)
PV = nRT
P = nRT/V
P = (0.642 mol)(0.0821 L·atm/mol·K)(221.15 K)/(8.6 L)
P = 1.44 atm
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If the difference between 30 tines k and 35 is 235 find the value of k
Answers
30k-35=235 so 30k= 235+35
30k= 270
K=9
a) At 40 °C, what the saturated solubility level of KCl (aq)? (1 mark)
b) If 40 g of KCl is added to 100 g of water at 90 °C, would the solution be saturated? Explain. (2 marks)
c) Describe two ways in which saturation can be achieved if only 40 g of KCl is added to 100 g of water at 90 ° (3 marks)
Answers
a) The saturated solubility level of KCl (aq) at 40°C is 35.7 g/100 mL of water.
b) No, the solution would not be saturated at 90°C. At this temperature, the solubility of KCl in water is higher than at 40°C. Therefore, more KCl can dissolve in 100 g of water at 90°C than at 40°C. To determine if the solution is saturated, we need to compare the amount of KCl that actually dissolved in the water to the maximum amount of KCl that can dissolve in the water at that temperature. If the amount of KCl that dissolved is less than the maximum amount, then the solution is unsaturated. If the amount of KCl that dissolved is equal to the maximum amount, then the solution is saturated. If the amount of KCl that dissolved is greater than the maximum amount, then the solution is supersaturated.
c) Two ways in which saturation can be achieved if only 40 g of KCl is added to 100 g of water at 90°C are:
i) Heating the solution to a higher temperature: As the temperature of the solution is increased, the solubility of KCl in water also increases. Therefore, by heating the solution to a higher temperature than 90°C, more KCl can be dissolved in the water until the solution becomes saturated.
ii) Allowing the solution to cool slowly: If the solutionis heated to a temperature higher than 90°C and then allowed to cool slowly, the solubility of KCl in water decreases as the temperature decreases. This means that as the solution cools, KCl will begin to precipitate out of the solution until the solution becomes saturated. Alternatively, if the solution is left undisturbed at 90°C and allowed to cool slowly, KCl will begin to precipitate out of the solution as it reaches its saturation point.
The Gateway Arch in St. Louis, MO is approximately 630 ft tall. How many U.S. dimes would be in a stack of the same
height? Each dime is 1.35 mm thick.
Answers
Answer:
142240
Explanation:
We are told in the question:
Height of Gateway Arch in St. Louis, MO = 630ft
We are asked, how many U.S. dimes would be in a stack of the same
height when 1 dime is 1.35 mm thick.
Step 1
Convert height in ft to mm
1 ft = 304.8 mm
630ft =
Cross Multiply
630ft × 304.8mm/1ft
= 192024 mm.
Step 2
To find how many US dimes would be in a stack of the same height
= Total thickness/ Thickness of 1 US dime
= 192024 mm/1.35mm
= 142240
Therefore, the number of dimes that would be in a stack of the same
height is 142240
describes the oil-free paint manufacturing process
Answers
Answer:
which account for over 60% of total resin use in the USA. The main pigment was titanium dioxide and the major solvents aliphatic hydrocarbons
Explanation:
A botfly lays an egg in the skin of an animal. When the larvae hatches from the egg, it burrows deep into the skin . The animal may become sick from having the larvae under its skin. What type of relationship is being describe, and what roles do each organism play?
Answers
Answer:
A botfly that lays an egg in the skin of an animal when the larvae hatches from the egg, it burrows deep into the skin. The animal that may become sick from having the larvae under its skin is called Mutualism.
Explanation:
The animal is the host while the botfly is the parasite. A mutualism in which one mutualistic partner removes parasites, as well as dead or diseased skin from another, in return receiving a steady supply of food is called Pollination. Nearly all pollination services involve a mutualism that has evolved over millions of years. Another example is reproduction.
what mass of glucose c6h12o6 would be required to prepare 5000 mL of a 0.215 M solution
Answers
Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.
To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:
Molarity (M) = moles of solute / volume of solution (in liters)
First, let's convert the volume of the solution from milliliters (mL) to liters (L):
5000 mL = 5000/1000 = 5 L
Now, we can rearrange the formula to solve for moles of solute:
moles of solute = Molarity (M) x volume of solution (L)
moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol
Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:
mass of solute = moles of solute x molar mass of solute
mass of glucose = 1.075 mol x 180.16 g/mol
mass of glucose = 194.0 g (rounded to three significant figures)
Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.
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1. EXPLAIN the steps required to find the molar mass of NH3 . Also,
type your final answer to two decimal places.
Answers
Answer: Molar mass of \(NH_3\) is 17.03 g
Explanation:
Molar mass is defined as the mass in grams of 1 mole of a substance.
S.I Unit of Molar mass is gram per mole and it is represented as g/mol.
It is found by adding the atomic masses of all the elements present.
Atomic Mass of Nitrogen (N) = 14.007 g
Atomic Mass of Hydrogen (H) = 1.008 g
Molar mass of \(NH_3\) = 1(14.007)+3(1.008) g = 17.03 g
Use the scenario to answer the following question. Four scientists observed an area of land that had been cleared of all trees and bushes to make space for a power line. Each scientist had a different argument about the impact clearing this area of land might have on the bird population living in the ecosystem. Which scientist’s argument demonstrates how the ecosystem will MOST LIKELY be impacted? A. Scientist 4: The rate of erosion will decrease causing less food and shelter to be available to the birds. B. Scientist 1: The natural enemies of birds will be eliminated causing less food and shelter to be available to the birds. C. Scientist 2: Weather conditions may change causing less food and shelter to be available to the birds. D. Scientist 3: The population of trees in the environment will decrease causing less food and shelter to be available to the birds.
Answers
Answer:
b
Explanation:t not sure
Answer:
c
Explanation:
A wave has 9.2 x 10-22 ) of energy. What is its wavelength?
Answers
Answer:
\(\lambda=2.2x10^{-4}m\)
Explanation:
Hello!
In this case, since the relationship between energy and wavelength is defined via the speed of light and the Planck's constant as shown below:
\(e=\frac{c*h}{\lambda}\)
Since c stands for the speed of light and h for the so-called Planck's constant, we can compute the wavelength as follows:
\(\lambda=\frac{c*h}{e}=\frac{3.0x10^8m/s*6.626x10^{-34}J*s}{9.2x10^{-22}J}\\\\\lambda=2.2x10^{-4}m\)
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if 2.62 g of argon gas occupies a volume of 5.18L, what volume with 1.25 moles of argon gas occupy under the same temp and pressure
Answers
Answer: 98.7 L
Explanation:
Since the atomic mass of argon is 39.948 g/mol, 2.62 grams of argon gas is the same as moles.
We can now set up a proportion to solve for the volume.
\(\frac{V}{1.25}=\frac{5.18}{0.065585260839091}\\\\V=98.7 \text{ } L\)
2.59 Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the following elements: (a) Ga and F, (b) Li and H, (c) Al and I, (d) K and S.
Answers
Answer:
(a) GaF3, gallium(III) fluoride
(b) LiH, lithium hydride
(c) AlI3, aluminum(III) iodide
(d) K2S, potassium sulfide
The only sure evidence for a chemical reaction is
Answers
Answer:
that one or more new substances are produced. Temperature Changes Chemical reactions can release energy or absorb energy.
Explanation: .
11. Which symbol is
associated with
structure C?
A
B
O
O
O
+
X
n
℗ JOU
n
e
O
O
O
O
Answers
Since the number of the protons and the neutrons are the same, none of the images can be refer to structure C. Option D
What is a neutral atom?A neutral atom is an atom that has an equal number of protons and electrons, resulting in a net charge of zero.
Protons are positively charged particles found in the nucleus of an atom, while electrons are negatively charged particles that orbit the nucleus. The number of protons in an atom determines its atomic number and the element it represents, while the number of electrons determines its overall charge.
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The first-order rate constant for the decomposition of N2O5,
2N2O5(g)→4NO2(g)+O2(g)
at 70∘C is 6.82×10−3 s−1. Suppose we start with 2.50×10−2 mol of N2O5(g) in a volume of 1.6 L What is the half-life of N2O5 at 70 ∘C ?
Answers
The half-life of N₂O₅ at 70°C then it is 50s or 0.8min
Half life is the the interval of time required for one half of the atomic nuclei of a radioactive sample to decay
The first-order rate constant for the decomposition of N₂O₅ and reaction is
2N₂O₅(g) → 4NO₂(g)+O₂(g)
The half life is the time at which the concentration of N₂O₅ is the half initial concentration that is [ N₂O₅ ] = 1/2 [ N₂O₅ ]₀
Using this same equation then
ln ([N₂O₅]) = -2kt + ln ([N₂O₅]₀)
We replace [ N₂O₅ ] by 1/2[ N₂O₅ ]₀ and solve for t
ln (1/2 [N₂O₅]₀) = -2kt + ln ([N₂O₅]₀) applying logarithmic property
ln 1/2 + ln([N₂O₅]₀) = -2kt + ln ([N₂O₅]₀) solving for t and applying logarithmic property (ln 1/2 = ln 1 - ln 2 = 0 - ln 2 = - ln 2)
t = ln 2/2k
t = 50s or 0.8min
The half-life of N₂O₅ at 70°C then it is 50s or 0.8min
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How would you use a serial dilution to create about 50.00 ml each of 0.10M, 0.20M, 0.30M and 0.40M solution (using beforehand solution) starting from a stock solution of 10.0M HCl?
Answers
Answer:
uty tyuuuuuuuuuA) 1,280
B) 320
C) 144
C) 80
Explanation:
A) 1,280
B) 320
C) 144
C) 80
Balance the chemical equations.
1FeCl3 + KOH → Fe(OH)3 + KC1
Answers
Answer:
FeCl3 + 3KOH → Fe(OH)3 + 3KCl
Explanation:
A sample of hydrogen gas exerts a pressure of 466 torr in a container. What is this pressure in atmospheres? (1 atmosphere = 1.01325 x 10^5 Pa=760 torr
Answers
Answer:
pressure = 0.61512atm
Explanation:
1 torr = 0.00132 atm
466 torr = unknown atm
unknown = 0.61512 atm
pressure = 0.61512atm
If I Gave A Pig Bacon Would He Eat It ?
Answers
g Determine the oxidation state for each of the elements below. ... The oxidation state of ... phosphorus ... in ... phosphorous tribromide PBr3 ... is ... . The oxidation state of nitrogen in nitrogen gas N2 is . The oxidation state of arsenic in arsenic acid H3AsO4 is .
Answers
Answer:
- P in PBr3 is +3.
- N in N2 is 0.
- As in H3AsO4 is +5.
Explanation:
Hello!
In this case, since the determination of the oxidation states is performed by using the well-known charge balances, we can proceed as shown below:
- P in PBr3: Here, bromide ions have an oxidation state of -1, so we follow:
\(P^xBr_3^-\\\\x-3=0\\\\x=+3\)
Thus, the oxidation state is +3.
- N in N2: Here, since nitrogen is bonding with nitrogen and it is neutral, we infer its oxidation state is 0.
- As in H3AsO4: Here, oxygen is -2 and hydrogen +1, so we follow:
\(H_3^+As^xO_4^{-2}\\\\3+x-8=0\\\\x=8-3\\\\x=5\)
Thus, the oxidation state is +5.
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How many moles of NaCl are there in 40.3 g of sodium chloride?
Please answer all the questions in the picture below
Thank you
Answers
Answer:
58.44277 gram
Explanation:
I need help plz!!!!!! (40 points)
___ earth's closest to the sun when it is in the summer in the
1, Southern Hemisphere
2. Northern Hemisphere
3. Western Hemisphere
4. Eastern Hemisphere
(NO LINKS!!!!!!!!!)
Answers
Answer:
the correct answer is 2. Northern Hemisphere