General Chemistry Answers

Which of the following statement(s) about atoms is/are correct?

a. Atoms compose matter

b. Atoms are the basic building block of nature

c. All of the above statements are true

d. An atom is the smallest identifiable unit of an element

How is Dalton's law illustrated in experiment evaluation of the Gas Law constant?

How is the atmospheric pressure corrected for:

A) the percent of water vapor ?

B) the level of liquid in the tube different from that in the beaker?

What would be the effect (increase , decrease or no change ) on the calculated value of R of each of the following ? Explain each answer.

A)an air bubble was trapped in the audiometer once it is being inverted in the beaker.

B)some Mg adheres to the inside wall of the audiometer tube after the reaction has ceased and the acid level is quite a bit lower than the piece of Mg.

C) some H2 escapes into the beaker during the reaction

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The heat of vaporization of methanol, CH3OH, is 35.20 kJ/mol. Its boiling

point is 64.6°C. What is the change in entropy for the vaporization of

methanol?

What is the pH of the solution containing 0.20 M NH3 and 0.15M NH4Cl?

Given the Equation 6K + B2O3. 3K2O + 2B

How many grams of K2O will be produced whe you react one 3.5 g of B2O3

Calculate the pH of the following acid or base.

1. A 0.010 M HCl solution

pOH = 

pH =

1. A 0.010 M HCl solution

pOH = 

pH =