CHEMISTRY HIGH SCHOOL

a gas in a balloon at constant pressure has a volume of 120.0 mL at -123°C. What is the volume at 27.0°C?

Answers

Answer 1
Answer:

The law that can be applied here is Charle’s Law which states that for a fixed mass of gas and at constant pressure, the volume is directly proportional with the absolute temperature. It is represented by the equation of V1/T1=V2/T2. Since there is no negative volume, we will change the temperature into Kelvin, (-123+273=150K) and (70+273=300K). plugging in the values, V2 = (300K)(120mL/150K) we get a volume of 240mL.

Related Questions

1. In general, the nucleus of a small atom is stable. Therefore, over very short distances, such as those in a small nucleus, a. the strong nuclear force is much greater than the electric force. b. the electric force is much greater than the strong nuclear force. c. the strong nuclear force equals the electric force. d. the strong nuclear force and the electric force are both attractive. 9. Uranium-238 undergoes alpha decay. Therefore, uranium-238 will a. remain stable. b. change into a different element altogether. c. emit neutral particles and no energy. d. none of the above
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Reaction rate is the speed with which reactants are converted to products in a chemical reaction. True or False?
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Salt water is classified as a1) compound because the proportion of its atoms is fixed
2) compound because the proportion of its atoms can vary
3) mixture because the proportion of its components is fixed
4) mixture because the proportion of its components can vary

Answers

Salt Water is classified as a:

4) mixture because the proportion of its components can vary.

Salt water is composed of salt and water.  Regardless of the amount of salt or water put together, these two still form salt water.

Answer:

4) mixture

Explanation:

The answer is 4) because salt water has 2 properties which are salt and water.  Never the less the amount of salt or water you keep adding the substance would always remain as salt water.

Which radioisotope has the fastest rate ofdecay?
(1) 14C
(2) 37Ca
(3) 53Fe
(4) 42K

Answers

The correct answer is 2. 37Ca.

The fastest rate of decay in radioisotope is 37Ca. Another name for radioisotope is radioactive of isotopes which are of given element.

The different number of neurons and the same number of protons are present on the same element with different isotopes. Radioisotopes are considered to have an unstable combination of neutrons and protons.
The correct answer to this question is (2) 37Ca . The radioisotope that has the fastest rate of decay is 37Ca. Radioisotope or also known as radioactive isotopes of a given element. Same number of protons but different number of neurons are present on different isotopes of the same element. They are considered as atoms that have unstable protons and neutrons combination.

Balance this equation please.

Answers

2K + 2H2O = 2KOH + H2
2K + 2H2O = 2KOH + H2  Actually Really what That other guy said

Which compound is an electrolyte? 1. H2O 2. C2H6 3. H3PO4 4. CH3OH

Answers

An electrolyte is a substance that releases ions when it is dissolved in water. Electrolytes are divided into salts, ions and bases. In this case, the electrolyte is H₃PO₄ as it releases H+ ions and PO₄⁻³ ions when it is dissolved in water.

The electrolyte is H₃PO₄, this is because it releases H⁺ ions and PO₄⁻³ ions when it is dissolved in water

What is an electrolyte?

In chemistry, an electrolyte is a substance that has the capacity of conducting electric current by dissociating into positively and negatively charged ions, which migrate to the cathode and anode of an electric circuit, respectively.

  • Electrolyte releases ions when it is dissolved in water.

From the given information;

The electrolyte is H₃PO₄, this is because it releases H⁺ ions and PO₄⁻³ ions when it is dissolved in water.

Learn more about electrolytes here:

brainly.com/question/1708976

What is the evidence of a chemical reaction when the fireworks go off

Answers

When fireworks go off, they produce smoke, which is evidence of a new substance being created.

Which phrase best describes the effect of a catalyst on a chemical reaction?

Answers

A catalyst lowers the activation energy of a reaction which makes the reaction happen at a faster rate. The catalyst lowers the activation energy by changing the reaction mechanism. I hope this helps. Let me know if anything is unclear.
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