Which statement would be the most useful for deriving the ideal gas law? Volume is directly proportional to the number of moles. Volume is inversely proportional to the temperature. Pressure is directly proportional to the volume. Pressure is inversely proportional to the number of moles.

Answers

Answer 1

Answer: The answer is: Volume is directly proportional to the number of moles.

Given the ideal gas equation: PV = nRT

We can see that pressure (P) and volume (V) are on the left side of the equation, while the number of moles (n), the gas constant (R), and temperature (T) are on the right side.

If you increase/decrease the volume, this results in a direct increase/decrease of the number of moles, which proves the statement true. Volume is also directly proportional to temperature. Pressure is inversely proportional to volume, and directly proportional to the number of moles.

Answer 2

Answer:

Answer:

Explanation:

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which of the following is not a mixture? a)antibiotic b)evaporated milk c)brewed coffee d)hydrogen chloride

Answers

Answer:

d) Hydrogen chloride

Explanation:

Hydrogen chloride (HCl) is not a mixture. It is a chemical compound composed of two elements, hydrogen (H) and chlorine (Cl), combined in a fixed ratio. In contrast, the other options (antibiotic, evaporated milk, brewed coffee) all involve mixtures:

Antibiotics are typically mixtures of various chemical compounds used for medicinal purposes.

Evaporated milk is a mixture of milk and water with the water removed.

Brewed coffee is a mixture of water and coffee grounds, often with other components like sugar or cream added.

Hydrogen chloride, on the other hand, is a pure compound with a defined chemical formula (HCl) and consistent composition.

Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. a bottle contains 425 ml of insulin at a concentration of 20.0 mg/ml . what is the total mass of insulin in the bottle?

Answers

Answer is: mass of insulin in the bottle is 8500 milligrams or 8.5 grams.

V(insulin) = 425 ml; volume of solution.
d(insulin) = 20.0 mg/ml; density of solution.
m(insulin) = V(insulin) · d(insulin).
m(insulin) = 425 ml · 20 mg/ml.
m(insulin) = 8500 mg.
m(insulin) = 8500 mg ÷ 1000 ml/l.
m(insulin) = 8.5 g.

What is the total number of grams of NaI(s)needed to make 1.0 liter of a 0.010 M solution?
(1) 0.015 (3) 1.5
(2) 0.15 (4) 15

Answers

You have to multiply. That is molecules x ram = 0.01 * 150 = 1.5So your answer is 3) 1.5.

Calculate how much gasoline and money could be saved if the automobile's fuel efficiency were increased by 25%.Gasoline = 25 gallons per week
Money = $2 per gallon ($50 total)

Answers

In the question it is already given the amount of actual gasoline and money consumed before the fuel efficiency gets increased by 25%
Gasoline consumption before the increase in fuel efficiency = 25 gallons per week
Gasoline saved after the increase in fuel efficiency = [25 * (25/100)] gallons per week
= 6.25 gallons per week
So every week 6.25 gallons of gasoline can be saved after increasing the efficiency of the automobile by 25%.
Then
The amount of money saved against the 6.25 gallons of gasoline saved = (6.25 * 2) dollars
= 12.50 dollars
The amount of money saved is $12.50 per week.

Describe meteor showers

Answers

Answer:

a rain of asteroids coming from space

Explanation:

Meteor showers occur when dust or particles from asteroids or comets enter Earth's atmosphere at very high speed. When they hit the atmosphere, meteors rub against air particles and create friction, heating the meteors. The heat vaporizes most meteors, creating what we call shooting stars.

A solution with a pH of 2.0 has a hydronium ion concentration ten times greater than a solution with a pH of(1) 1.0 (3) 3.0
(2) 0.20 (4) 20.

Answers

Answer:The correct answer is (3).

Explanation:

The pH of the solution is defined as negative logarithm of $H^+$ or hydronium ions ions in the solution.

$pH=-\log[H^+]$

$2=-\log[H^+]$

$[H^+]=0.01 M$

The pH with 10 times the concentration $H^+$ ions.

$[H^+]=10* [H^+]'$

$pH=-\log[H^+]'=-\log[(0.01)/(10)]=3$

Hence, the correct answer is (3).

The answer is (3) 3.0. The solution with a pH of 2.0 has greater concentration means the other solution has greater pH. pH=-lg[H+]. So we can get the pH of other solution is 3.

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