All gaseous mixtures are solutions.

Answers

Answer 1

Answer: The statement "All gaseous mixtures are solutions." is true. This is because there are a number of gaseous molecules present in a volume of gas and they are considered solutions.

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Water is dissolved into n-butanol (a polar liquid). Which is the second step at the molecular level as water dissolves into n-butanol?n-Butanol mixes with water. Water molecules are carried into n-butanol. n-Butanol molecules surround water molecules. n-Butanol molecules are attracted to the surface of the water molecules.

The muscles in your body make up about percent of your body weight.

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The muscles in our body make up for 38% - 54% in males and 28% - 39% in females.

Answer:

The answer is 40-50 percent I did it and it was correct.

Explanation:

I would not mind Brainliest pls.

Most metals are in the liquid state at room temperature.

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that statement is False.

Most metals are in the solid state at room temperature. The only metal that is in liquid state in the room temperature is Mercury, (Hg)

An atom of lithium 7 has an equal number of

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Electrons and protons

Lithium 7 has an equal number of protons and neutrons.

Which two compounds have the same molecular formula but different chemical and physical properties?(1) CH3CH2Cl and CH3CH2Br
(2) CH3CHCH2 and CH3CH2CH3
(3) CH3CHO and CH3COCH3
(4) CH3CH2OH and CH3OCH3

Answers

Answer is (4) - CH₃CH₂OH and CH₃OCH₃.

Both CH₃CH₂OH and CH₃OCH₃ have same molecular formula as C₂H₆O. But CH₃CH₂OH is an alcohol and CH₃OCH₃ is an ether.

Although two compounds have a same molecular formula, the atomic arrangement of those compounds differs from each other.

Hence, CH₃CH₂OH and CH₃OCH₃ are isomers of the formula C₂H₆O.

Due to the different arrangement of atoms, both compounds have different chemical and physical properties.

The answer is (4) CH3CH2OH and CH3OCH3. You need to figure out which pair has the same molecular formula which means that they have the same number of same atoms. Then you can get the write answer.

How many liters of oxygen gas can be produced if 28.7 grams of water decomposes at 294 Kelvin and 0.986 atmospheres? Show all of the work used to solve this problem. . . 2 H2O (l) --->2 H2 (g) + O2 (g)

Answers

2 H₂O (l) → 2 H₂ (g) + O₂ (g)

Molar mass water = 1.01 x 2 + 16.00 = 18.02 g/mol

Number of mol water decomposed = 28.7 g H₂O x [1 mol / 18.02g] = 1.59 mol H₂O

From the balanced equation 2 mol H₂O decomposes to 2 mol H₂ and 1 mol O₂

so the mole ratio water : oxygen = 2 : 1

and number of mol O₂ produced = ½ x 1.59 = 0.796 mol O₂

The ideal gas law is PV = nRT

so V = nRT/P

P = 0.986 atm

V = ?

n = 0.796

R = 0.0821 L atm K⁻¹ mol⁻¹

T = 294K

V = 0.796 x 0.0821 x 294 / 0.986

V = 19.5 L

So 19.5 L O₂ gas are produced

I hope my answer has come to your help. Thank you for posting your question here in Brainly.

Absorption of energy into the refrigerant causes a phase change from _____.solid to liquid
liquid to vapor
vapor to liquid
liquid to solid

Answers

liquid to solid i think

the answer is liquid to gas :)

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