+1-415-315-9853

info@mywordsolution.com

 Algebra Math Calculus Physics Chemistry Biology Earth Science Physiology History Humanities English Sociology Nursing Science

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.

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

Have any Question?

## Related Questions in Chemistry

### Fr this question imagine that sea water is a 35 mass

For this question imagine that sea water is a 3.5 mass % solution of NaCl with a density of 1.00g/mL. Assume full dissociation of the NaCl. a) Calculate the freezing point of sea water.Briefly explain why it is not 0 (de ...

### The elements of 3d transition series are given assc ti v cr

the elements of 3d transition series are given as:sc, ti, v, cr, Mn, fe, Coanswer the following: (a) write the element which shows max. no. of oxidation states.why? (b)which element has highest M.P (c) which elements is ...

### If 628 g ca react with 923 g hcl according to the reaction

If 62.8 g Ca react with 92.3 g HCl according to the reaction below, how many grams of hydrogen gas will be produced, and how many grams of the excess reactant will be left over? Unbalanced equation: Ca + HCl → CaCl2+ H2 ...

### 1 the general public often expects solutions to our

1. The general public often expects solutions to our environmental issues that have zero risk. Explain in less than 200 words whether this is possible, supporting your answer with a thoughtful discussion of what risk is ...

### Using the following data calculate the pressure of 100mol

Using the following data, calculate the pressure of 1.00mol of Ar(g) in a 40.0L container at 25 degrees Celcius using both the ideal gas equation and the real gas equation. Why are these two values so different? (aAr=136 ...

### If you eat a 48 g serving rice every fourth day and you

If you eat a 48 g serving rice every fourth day and you weigh 75 kg, what is your dose of inorganic arsenic (in µg per kg body weight per day) if the rice contains 386 µg kg -1 of total arsenic, 45% of which is inorganic ...

### In the following problem you must1 determine the correct

In the following problem you must: 1) Determine the correct formula for each reactant and product. 2) Determine the correctly balanced chemical equation. 3) Us the stoichiometry of the chemical equation to answer the que ...

(Subject: Chemistry & Physics) Please answer all questions. Please be clear. Short answers are fine. 3-4 sentences. 1) If a feather and a lead ball are dropped from 1000m in AIR (vacuum) , will they hit the ground at the ...

### Write a reserch paper on gas chromatographythis is a 10

Write a reserch paper on Gas chromatography. This is a 10 pages research paper that should include an introduction on chromatography, principles of separation, type of columns, resolution, detection methods and applicati ...

### Hello need help with the following chem Hello, need help with the following chem

Hello, need help with the following chem questions.  Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction:  2Al(s)+3Cl2(g)→2AlCl3(s) You are given 24.0 g of aluminum and 29.0 g of chlori ...

• 13,132 Experts

## 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.

### 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