A student dissolves 1 gram of sugar in 10 grams of water. She then
determines the mass of the solution. What is the mass of the dissolved
sugar and water? PS1-5 DOK 1

more than 11 grams<>11 grams

Answer:

im pretty sure its groundwater just read this and see the answer

Explanation:

The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.

Answer:

do u need answer for all of them?

Based on the information provided, it is not possible to fill in the blanks with certainty. In order to complete the sentence, Effective collisions are those collisions in which the reactant molecules collide with enough energy.

In general, the frequency of collision between reacting particles can have a significant impact on the rate of a chemical reaction. As the frequency of collision increases, there is a greater likelihood that reactant molecules will collide with sufficient energy and proper orientation to result in a chemical reaction. This can lead to an increase in the rate of the reaction.However, it is also important to note that factors such as temperature, concentration, and the presence of catalysts can also affect the rate of a chemical reaction. Therefore, a more specific description of the conditions of the reaction is needed to accurately complete the sentence.

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Solve without converting volume into dm³ as it will led into same answer

According to Boyles law

According to Boyle's law, the volume of gas in his blood  will be 25 ml at constant temperature.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,

P₁V₁=P₂V₂

substitution gives V₂=250×5/50=25 ml.

Therefore, the volume of gas in his blood  will be 25 ml at constant temperature.

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The answer is C.

The reactants are charcoal that is unlit + oxygen and the products are the burnt charcoal + energy.

So for every combustion reaction like this one, CxHy is the wood. So before you light the wood, it is actally a reactant together with oxygen, because without oxygen the wood will not burn. So under the influence of heat, wood produces substances like carbon dioxide and heat, the moment you see wood burning it it already producing products, CO2 and heat (which is the fire). This is a combustion reaction.

Combustion reaction is exothermic because it releases energy.

The kinds of intermolecular forces that are present in each element or compound are as follows:

1. Kr - dispersion forces

2. NH3 - dispersion forces, dipole-dipole forces and hydrogen bonding

3. NO - dispersion forces and dipole-dipole forces

4. CH4 - dispersion forces


Let's understand this in detail:

The electronegativity of the atom in question and the relative proximity of the atom to other atoms determines the strength of the intermolecular forces.

In Kr, the intermolecular forces present are the weakest type, dispersion forces. This is because Kr is a noble gas with the lowest electronegativity among the elements.

In NH3, stronger dispersion forces, dipole-dipole forces, and hydrogen bonding are present because nitrogen has a high electronegativity and is surrounded by three hydrogen atoms with partial positive charges due to their electron-deficient nature.

In NO, there are only dispersion and dipole-dipole forces since no hydrogen atom is present to form hydrogen bonding.

Finally, in CH4, only dispersion forces are present since the four hydrogen atoms do not form a tetrahedral structure due to their symmetrical electron distribution.

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Answer:

2 mol/L

Explanation:

Molarity is Moles/Liters, you just simple divide 5 moles ÷ 2.5 L =2 mol/L

Answer:

I think the answer is B

Explanation:

Answer:

B

Explanation:

The air is too "rich" to burn above the upper limit, but the situation might soon deteriorate into danger: For instance, increasing the air in a space can quickly reduce the product's vapor percentage to levels that are within its flammability range, which could have explosive effects.

Flammable liquids and gases need to be handled and stored carefully since they have low flash points. Never assume that these items won't catch fire. You must continually keep in mind the safety precautions for handling and storing combustible products if you want to keep both you and your company safe.

To prevent them from getting engaged and stoking a fire, combustible objects including cardboard, paper towels, sawdust, and waste must be kept away from flammable storage spaces. All flammable liquid containers must be kept closed while not in use to further help avoid fires.

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Answer: slower and closer together,

Explanation:

A unit cell can be visualized as a building block that, when replicated in all directions, creates the entire crystal lattice. Unit cells can have different shapes, the most common types of unit cells include simple cubic, body-centered cubic, and face-centered cubic etc.

(a) Definition of a unit cell: A unit cell is the basic repeating unit of a crystal lattice. It represents the smallest portion of a crystal that, when stacked together, can generate the entire crystal structure.

(b) Sketch of a body-centered cubic (BCC) unit cell is represented in the image below. In the BCC unit cell, atoms are located at the eight corners of the cube and one atom is positioned at the center of the cube.

(c) Coordination number in a BCC unit cell: The coordination number is the number of nearest neighboring atoms surrounding a central atom. In a BCC unit cell, each atom is in contact with eight nearest neighboring atoms: one in the center of the unit cell and one at each of the eight corners.

(d) Calculation for the atomic packing factor (APF) of a BCC unit cell:

The APF is calculated as the volume occupied by the atoms in the unit cell divided by the total volume of the unit cell.

For a BCC unit cell, the APF can be calculated as follows:

APF = (Number of atoms in the unit cell * Volume of each atom) / Volume of the unit cell

In a BCC unit cell, there are two atoms (one at the center and one at the corner), and the volume of each atom can be approximated as (\(4/3\)) * π * \((radius)^3\). The volume of the unit cell can be calculated as the cube of the edge length.

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The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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Answer:

1/3

Explanation:

because i got it right

Answer:

100.12*C

Explanation:

Our solute is glycerin and the solvent is water.

1) Convert grams of the solute to moles:

n (moles)=Mass/Molar Mass => 1/92.1=0.01086 moles

2) Find molality from moles of solute and mass of solvent in Kg:

m (molality)=moles of solute/Kg solvent => 0.01086/0.0478=0.2272m

3) Finding the change boiling point (Bp) using molality times the Bp constant (the Bp constant of water is 0.512*C/m): 0.2272*0.512=0.116*C

4) Under 1 atm, the boiling point of water is exactly 100 and to find the new Bp, simply add the change Bp completed in step 3 with the boiling point of water: 100+0.116=100.116*C or 100.12*C

Hope this helps!

1.00 mol of water contains the most hydrogen atoms.

1 mol of water(H2O) contains 2 mol of hydrogen atoms

molar mass of hydrogen = 1.01 g/mol,

so 1 mol of water contains 21.01 = 2.02 g of hydrogen.

1 mol of Ammonia (NH3) contains 1 mol of hydrogen atoms

molar mass of hydrogen = 1.01 g/mol,

so 1 mol of ammonia contains 11.01 = 1.01 g of hydrogen.

hydrogen in 10.0 g of water  = 4.83 ×\(10^(22)\) hydrogen atoms

hydrogen in  15.00 g of ammonia = 1.48  ×\(10^(23)\) hydrogen atoms.

1 mol of water contains the most hydrogen atoms. This is because water, chemically represented as H2O, contains two hydrogen atoms for every oxygen atom. While 1 mol of ammonia(NH3) contains 1 mol of hydrogen atoms, 1 mol of water contains 2 mol of hydrogen atoms.

Therefore, 1 mol of water contains more hydrogen atoms than 1 mol of ammonia, and that's why option 3 -1 mol of water contains the most hydrogen atoms out of the options provided.

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Explanation:

Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.

Answer: the answer is True

Explanation:

The volume occupied by 0.50 mole of the gas at a temperature of 35 °C and at 1 atm is 12.6 L (3rd option)

We can obtain the volume of the gas by using the ideal gas equation as shown below:

PV = nRT

1 × V = 0.50 × 0.0821 × 308

V = 12.6 L

Thus, from the above calculation, it is evident that the volume of gas is 12.6 L (3rd option)

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According  to stoichiometry and concept of Avogadro's number there are 3.61×10²⁴ particles for 4 moles of KClO₃.

As 2 moles of potassium chlorate gives 3 moles of oxygen , thus 4 moles of potassium chlorate will give 4×3/2=6 moles , 6 moles have 6×6.023×10²³=3.61×10²⁴ particles.

Thus,  there are 3.61×10²⁴ particles for 4 moles of KClO₃.

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The molecular formula of the compound is C3H6O2, indicating that there are 3 carbon atoms, 6 hydrogen atoms, and 2 oxygen atoms in one molecule.

To calculate the molecular formula, we need to determine the ratio of each element present in the compound. Given the percentages of carbon (C), hydrogen (H), and oxygen (O) in the compound as 40.00%, 6.71%, and 53.28% respectively, we can assume a 100 gram sample.

Convert the percentages to grams:

C: 40.00% of 100 g = 40.00 g

H: 6.71% of 100 g = 6.71 g

O: 53.28% of 100 g = 53.28 g

Convert the grams to moles:

C: 40.00 g / 12.01 g/mol (molar mass of carbon) = 3.33 mol

H: 6.71 g / 1.01 g/mol (molar mass of hydrogen) = 6.64 mol

O: 53.28 g / 16.00 g/mol (molar mass of oxygen) = 3.33 mol

Divide the moles by the smallest number of moles:

C: 3.33 mol / 3.33 mol = 1

H: 6.64 mol / 3.33 mol = 2

O: 3.33 mol / 3.33 mol = 1

Therefore, the molecular formula of the compound is C3H6O2.

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Answer:

1a) .68 moles 1b)4.1E-23 molecules.

2a) .37 moles 2b) 2.27E-23 molecules

Explanation:

1a) CO2 is equal to 44 grams (C→12 grams,O→16 grams[·2]) .30g/44g is .68 moles.

1b) multiply 1A by advogadros number (6.022E-23)

2a) NaCl is 58 grams. 22/58 is .37 moles.

2b) multiply 2A by advogadros number.

you'd answer #3 the same way #1 and #2

The branch of science that deals with chemicals and bonds are called chemistry. The moles are units to calculate the quantity required to use the element.

The correct answer is mentioned below.

According to the question, the moles to the option is as follows:-

\(n =\frac{M}{M.M}\\ \\\frac{30}{44} \\\\=0.681\\\\\)

The number of molecules is \(0.68 *6022*10^{23} =4.09496*10^{23\).

2. moles of 22 grams of NaCl is

\(\frac{22}{44}\\ \\=0.5\\\\\)

Molecules will be \(0.5*6.022*10^{23} = 3.011*10^{23}\)

3. moles of 50-gram ammonia

\(\frac{50}{17} \\\\2.94\\\)

The number of molecules is \(2.94*6.022*10^{23} = 1770*10^{23\)

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Answer:

AgCl

Explanation:

Got correct on E2020

Answer:

B: AgCl

Source: trust me bro

The percent by mass of each element in \(HClO_{3}\) is approximately:

Hydrogen (H): 1.05%, Chlorine (Cl): 36.75%, Oxygen (O): 31.20%

What is mass?

To calculate the percent by mass of each element in the compound \(HClO_{3}\) , we need to determine the molar mass of the compound and the molar mass of each element present in the compound.

The molar mass of \(HClO_{3}\) can be calculated as follows:

Molar mass of H = 1.01 g/mol

Molar mass of Cl = 35.45 g/mol

Molar mass of O = 16.00 g/mol

Molar mass of  \(HClO_{3}\) = (1 x 1.01) + (1 x 35.45) + (3 x 16.00) = 96.46 g/mol

Therefore, the percent by mass of each element in \(HClO_{3}\) is as follows:

Percent by mass of H = (mass of H / molar mass of  \(HClO_{3}\) ) x 100%

= (1.01 g / 96.46 g) x 100%

= 1.05%

Percent by mass of Cl = (mass of Cl / molar mass of \(HClO_{3}\) ) x 100%

= (35.45 g / 96.46 g) x 100%

= 36.75%

Percent by mass of O = (mass of O / molar mass of \(HClO_{3}\) ) x 100%

= (3 x 16.00 g / 96.46 g) x 100%

= 31.20%

Therefore, the percent by mass of each element in \(HClO_{3}\) is approximately:

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When they talk about items found, they refer to molecules. According to Avogadro, one mole of any substance, regardless of its type, contains the same amount of molecules equal to 6.022x10^23.

Now they tell us about a molecule of silver and a mole of calcium. In one mole of calcium, there will be 6.023x10^23 molecules, which is different from one molecule of silver, so the answer will be false

Answer:

true

Explanation:

its A

The above statement is considered to be correct and true.

The Occupational Safety and Health Administration (OSHA) is a federal agency that is saddled with the responsibility of assuring and ensuring a safe and healthy working conditions for an employee or group of employees by doing the following;

According to the Occupational Safety and Health Administration (OSHA), trainings on the adoption and application of safety precautions (tools) such as wearing a personal protective equipment (PPE); face masks (respirators), ear plugs, safety boots, gloves, helmet, etc., are very important and are essentially to be used by all employees (workers) while working in hazard prone environments or industries.  

However, when an employee fails to strictly adhere to the recommended OSHA safety precautions, he or she is more likely to sustain a work-related accident or injury from a fall. Thus, this would negatively affect (impact) the employee because it results in him or her being absent from work (time off) and requires some costs to pay for medicals (medical cost).

In conclusion, injuries from work related falls can affect employees by resulting in time off and medical cost.

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Answer:

The answer is b

Explanation:

Hope it helps

b) electrons have a mass of 1 amu

electrons have a mass of 0 amu

Evaporation is the process by which a liquid converts into a gas or vapor at a temperature below its boiling point. Latent heat of fusion is the amount of heat required to convert a solid into a liquid without any change in temperature.  Steam causes more severe burning as compared to boiling water at 100°C due to the large amount of latent heat of vaporization.

On the other hand, boiling is the process by which a liquid turns into a gas or vapor at a temperature equal to or above its boiling point. In other words, when the liquid is heated to a temperature equal to or greater than its boiling point, it turns into a gas or vapor. The effect of humidity on the rate of evaporation is that if the air around the liquid is already humid, then the rate of evaporation will be slower because the air is already saturated with water molecules.
Latent heat of fusion is the amount of heat required to convert a solid into a liquid without any change in temperature. In other words, it is the amount of heat required to break the intermolecular forces between the molecules of a solid to convert it into a liquid.
Steam causes more severe burning as compared to boiling water at 100°C because steam contains a large amount of latent heat of vaporization. When steam comes in contact with the skin, it releases a large amount of latent heat of vaporization, which causes more severe burns as compared to boiling water at 100°C.

Evaporation is the process of turning a liquid into a gas or vapor at a temperature below its boiling point. Boiling, on the other hand, is the process of turning a liquid into a gas or vapor at a temperature equal to or above its boiling point. Humidity affects the rate of evaporation. Latent heat of fusion is the amount of heat required to convert a solid into a liquid. Steam causes more severe burning as compared to boiling water at 100°C due to the large amount of latent heat of vaporization.

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