Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Chemistry Expert

Fundamentals of chemistry.

1. Hydrogen bonding in water contributes to
1. a decreased boiling point
2. an increased vapor pressure
3. a decreased melting point
3. a decrease in volume on freezing
4. none of the above.

2. The conditions under which gases behave most ideally are
1. high temperature, high pressure
2. low temperature, low pressure
3. high temperature, low pressure
4. low temperature, high pressure

3. Under the Bronsted?Lowry definition a base is
1. a source of hydroxide ions.
2. a proton donor
3. a proton acceptor
4. a nonelectrolyte

4. The gas in a cylinder at 20.0 oC exerts a pressure of 200 atm. The cylinder is heated to a temperature of 200 oC. To what value will the pressure rise assuming the cylinder volume does not change?
1.484 atm.
2. 223 atm.
3. 2000 atm.
4. 20 atm.
5. none of the above.

5. Which pressure does not correspond to 1.25 atm? ( 1 in. = 2.54 cm)?
1. 950 torr
2. 950 cm Hg
3. 37.4 in. Hg
4. all of the above.
5. none of the above

6. A solution is found to have a pH 3.20. What is its pOH?
1. 3.20
2. 8.80
3. 14.00
4. 10.80

7. The pH of many cola ? type drinks is about 3.0. How many times greater is the hydronium ion concentration in these drinks than in neutral water?
1. 10,000 times
2. 1,000
3. 7,000 times
4. 100,000 times
e. none of the above, pH of water and most colas are the same.

8. At constant temperature the volume of a gas is inversely proportional to its pressure. This is known as (the)
1. Boyle's law.
2. Dalton's law.
3. Charles` law.
4. ideal gas law.

9. Changing the temperature of 4.0 mol of hydrogen gas at constant pressure from 100 oC to 200 K will
1. increase its mass by a factor of three.
2. decrease the volume that the gas occupies.
3. increase the kinetic energy of the hydrogen molecules.
4. decrease the density by a factor of two.

10. In one experiment, a dry sample of an unknown gas was collected. Its volume at 745 mm Hg and 63.0 oC was 815.5 mL. How many moles of this gas was obtained?
1. 0.0290 moles
2. 2.90 moles
3. 29.0 moles
4. 2310 moles
5. none of the above.

11. A weak electrolyte generates
1. a high percentage of ionization in solution.
2. a low percentage of ionization in solution.
3. essentially zero ionization in solution.
4. low solubility in a basic solution.

12.The possible consequences of the greenhouse effect were seen in recent data suggesting a correlation with the onset of spring in North American and all of Europe Recent satellite date shows spring plants emerging a full seven days early on average in the 1986?1996 period as compare with data for the 1960?1980 period. Fossil fuel use contributes to the greenhouse effect by increasing the concentration of which of the following gases.
1. ozone
2. carbon monoxide
3. carbon dioxide
4. all of the above.
5. none of the above.

Chemistry, Academics

  • Category:- Chemistry
  • Reference No.:- M918845

Have any Question? 


Related Questions in Chemistry

Question 1 - state why the second part of each statement is

Question 1 - State why the second part of each statement is incorrect and correct it. a)      Ammonium phosphate is (NH 3 ) 4 PO 4 b)      Ammonium hydroxide is ALOH 3 c)       Cr(NO 3 ) 3 is chromic(ii) chloride d)      ...

Explain why acidic rain produced as a result of excess

Explain why acidic rain produced as a result of excess sulphur dioxide in the atmosphere can cause degradation of buidings.

Question 1this is a tandem ms of a tryptic peptide the mass

Question 1: This is a tandem MS of a tryptic peptide. The mass of the intact peptide is 1569.692 Da. a. There are two immonium ions labelled with their mass-to-charge ratio in the spectrum. Label the signals with their s ...

What is the sum of all coefficients when the following net

What is the sum of all coefficients when the following net ionic equation is balanced using the smallest whole number coefficients possible? Do not forget coefficients of one. MnO 4 - + Mn 2+ MnO 2

Calculate the increase in the boiling point deltat for a

Calculate the increase in the boiling point, ΔT, for a 1.87 m solution of sucrose (dissolves as a molecule) in water.

When 0430 mole of titanium is combusted in a bomb

When .0430 mole of titanium is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 30.00degress Celsius to 91.60 degrees Celsius. In a separate experiment, the heat capacity of the calorime ...

A sample of o2 was collected over water at 25c and 865 atm

A sample of O2 was collected over water at 25C and .865 atm. If the total sample volume was 2.538 L, how many moles of O2 were collected?

Case studythe purpose of this assignment is for you to

Case Study The purpose of this assignment is for you to apply the concepts and information you learned in this unit about combustion products. Also, this assignment provides you with the opportunity to use your skills, e ...

A 100 l flask is filled with 100 g of argon at 25 c a

A 1.00 L flask is filled with 1.00 g of argon at 25 °C. A sample of ethane vapor is added to the same flask until the total pressure is 1.350 atm. What is the partial pressure of argon in the flask and what is the partia ...

Question 1in contrast to going without food the human body

Question 1 In contrast to going without food, the human body can survive only about __________ days without water. A. 3 B. 7 C. 11 D. 15 Question 2 Which of the following sources of water is most likely to contain contam ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen