hahahaa

The speed of a car will increase if the car's...

a) initial velocity is positive and its acceleration is negative

b) initial velocity is positive and its acceleration is zero

c) initial velocity is positive and its acceleration is positive

d) initial velocity is negative and its acceleration is positive

Which of the following is an area of physics that studies motion and its causes?

a) thermodynamics

b) optics

c) mechanics

d) quantum mechanics

How many variables may be tested legitimately in any one experiment?

a) as many as a physicist can handle

b) three

c) one

d) five

What two dimensions, in addition to mass, are commonly used by physicists to derive additional measurements?

a) length and width

b) velocity and time

c) area and mass

d) length and time

What quantity does the kilogram measure?

a) mass

b) time

c) distance

d) force

The radius of Earth is 6,370,000 m. Express this measurement in km in scientific notation with the correct number of significant digits.

a) 6.37x10^6 km

b) 637x10^3 km

c) 6.37x10^3 km

d) 63.7x10^4 km

What is the correct description of any change of position farther to the right of zero?

a) positive change of displacement

b) positive displacement

c) positive distance

d) positive position

What is the speed of an object at rest?

a) 1.0 m/s

b) 8.9 m/s

c) 0.0 m/s

d) 9.81 m/s

I was born in the USA

I've lived in Mexico for since I was born

My first language is Spanish

I have both nationalities

I'm fluent in english

I'm physically white

My mom was born in the USA

My dad was born in Mexico

My paternal grandmother was born and raised in Italy

My maternal grandmother's grandmother was born and raised in France but my grandmother and her mother were born in Mexico i think

All of my family is physically white if that matters

A. The potential energy of the particles in the substance decreases as the forces holding the particles together increase.

B. The potential energy of the particles in the substance becomes greater than the average kinetic energy of the particles.

C. The average kinetic energy of the particles in the substance decreases while the forces holding the particles together increase.

D. The average kinetic energy of the particles in the substance becomes great enough to disrupt the forces holding the particles together.

A. 3.00

B. 5.00

C. 7.00

D. 11.00

A. Hydrogen and oxygen gases react and form water.

B. Sugar granules are heated and form carbon and water.

C. Two atoms of bromine bond and form a diatomic molecule.

D. Solutions of silver nitrate and sodium chloride react and form solid silver chloride.

The pressure that is exerted on a diver increases as he or she dives deeper into the ocean. How will this affect the gases in the diver's blood?

A. The solubility of the gases will decrease.

B. The solubility of the gases will increase.

C. The mass of the gas molecules will decrease.

D. The mass of the gas molecules will increase.

Open the link next to the number to see the questions!

1)http://tinypic.com/r/n2zloj/5

2)http://tinypic.com/r/mtotwx/5

3)http://tinypic.com/r/2hn8krs/5

4)http://tinypic.com/r/i3vqk0/5

5)http://tinypic.com/r/35k4mk1/5

6)http://tinypic.com/r/23lh442/5

7)http://tinypic.com/r/egqo3a/5

1)Which half-reaction is balanced?

A. O2+2H2O-->4OH- + 2e-

B. O2+2H2O-->2OH- + 4e-

C. O2+2H2O+2e- -->2OH-

D. O2+2H2O+4e- -->4OH-

2)Which of the following is a balanced oxidation half-reaction?

A. Cr2+-->Cr3+ +e-

B. Al3+ +3e- -->Al

C. 2H+ 2e- -->H2

D. Ca-->Ca2+ + e-

3)What will balance the half-reaction below?

Br2-->2Br-

A. adding one electron to the reactant side

B. adding two electrons to the reactant side

C. adding one electron to the product side

D. adding two electrons to the product side

4)Which of the following is an unbalanced reduction half-reaction?

A. F2-->2F-

B. Ag+-->Ag2+

C. MnO2-/4-->MnO-/4

D. Mg-->Mg2+

What is the pH of a solution that has a hydroxide ion concentration of 1.00 x 10^-11 M

A. 3.00

B. 5.00

C. 7.00

D. 11.00

Given the information below, what is the freezing point of a 1.0 M solution of LiBr?

http://tinypic.com/r/m9544m/5

A. –3.72°C

B. –1.86°C

C. 1.86°C

D. 2.72°C

What is the pH of a solution that has a hydronium ion concentration of 1.00 x 10^-4 M

A. 14.00

B. 10.00

C. 6.00

D. 4.00

A student used universal indicator to measure the pH of four different solutions, each with a concentration of 1 M.

http://tinypic.com/r/v2woqa/5

Which beaker contains universal indicator and a basic solution?

A. Orange

B. Yellow

C. Green

D. Blue

Given the information below, what is the freezing point of an aqueous solution of glucose that has a concentration of 0.222 M?

http://tinypic.com/r/2vtb1vn/5

A. –0.413°C

B. –0.326°C

C. 0.403°C

D. 0.500°C

Given the information below, what is the boiling point of a 1.50 M NaCl solution?

http://tinypic.com/r/14bt1lx/5

A. 98.5°C

B. 99.2°C

C. 100°C

D. 102°C

Blue litmus paper will turn red at pH values below 7, while red litmus paper will turn blue at pH values above 7. A group of students used litmus paper to classify two unknown solutions. The results are shown below.

Based on these results, how should the students classify the solutions?

http://tinypic.com/r/2yx3zwy/5

A. Solution X is basic, while solution Y is neutral.

B. Solution X is neutral, while solution Y is acidic.

C. Solution X is acidic, while solution Y is basic.

D. Solution X is basic, while solution Y is acidic.

What is the pH of a solution that has a hydronium ion concentration of 1.00 x 10^-10 M

A. 4.00

B. 7.00

C. 10.00

D. 14.00

In the reaction below, which compounds are Bronsted-Lowry bases?

http://tinypic.com/r/1huzjt/5

A. H2S and H2O

B. H2S and H3O+

C. HS- and H2O

D. HS- and H3O+

Given the information below, how does a 0.500 M glucose solution change the boiling point of water?

http://tinypic.com/r/312ka3q/5

A. It increases the boiling point by 0.412°C.

B. It increases the boiling point by 0.256°C.

C. It decreases the boiling point by 0.132°C.

D. It decreases the boiling point by 0.316°C.

What is the pH of a solution that has a hydroxide ion concentration of 1.0 x 10^-6 M

A. 4.00

B. 6.00

C. 8.00

D. 14.00

There are link to where there is supposed to be charts, pictures, etc. under some questions.

Please help with as many as you can! I will give the 10 points to whoever answers the most correctly.

A 14-karat gold ring contains other metals that make it stronger than pure gold. What is this type of matter called?

A. a colloidal mixture

B. an elemental particle

C. a homogeneous mixture

D. a heterogeneous substance

The results of an acid-base titration are shown in the table below. Phenolphthalein was used as an indicator.

http://tinypic.com/r/34dnzx2/5

What is the molarity of the hydrochloric acid solution?

A. 0.06 M

B. 0.14 M

C. 0.20 M

D. 0.30 M

Which change would MOST LIKELY increase the solubility of a solid in a liquid?

A. decreasing the pressure on the solute

B. decreasing the amount of the solute

C. increasing the temperature of the solution

D. increasing the concentration of the solution

A student neutralizes 20.0 mL of a sodium hydroxide solution (NaOH) by adding 28.0 mL of 1.0 M hydrochloric acid (HCl). What is the molarity of the solution?

HCl(aq)+NaOH(aq)---->NaCl(aq)+H2O(l)

A. 2.80 M

B. 1.40 M

C. 0.714 M

D. 0.028 M

Which type of compound is a weak electrolyte when dissolved in water?

A. a polar compound that does not ionize

B. a polar compound that ionizes completely

C. an ionic compound that is slightly soluble

D. an ionic compound that is completely soluble

A student neutralizes 20.0 mL of a sodium hydroxide solution (NaOH) by adding 28.0 mL of 1.0 M hydrochloric acid (HCl). What is the molarity of the solution?

A. 2.80 M

B. 1.40 M

C. 0.714 M

D. 0.028 M

HCl(aq)+NaOH(aq)---->NaCl(aq)+H2O(l)

At a pressure of 2.0 atm, hydrogen gas occupies a volume of 8.0 L. What pressure must the gas be under if the volume is increased to 10.0 L? Assume the temperature remains constant.

A. 0.16 atm

B. .16 atm

C. 1.6 atm

D. 16 atm

A gas at 72 °C occupies 10 L. What is the temperature in Kelvin when it expands to a volume of 22 L, assuming pressure remains constant?

A. 531 K

B. 663 K

C. 759 K

D. 812 K

A balloon is filled with 14 L of gas at 302 K. What is its temperature in Kelvin when the volume expands to 20 L, assuming pressure remains constant?

A. 403 K

B. 431 K

C. 463 K

D. 491 K

If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant, what final pressure would result if the original pressure was 750.0 mmHg?

A. 441.4 mmHg

B. 580.7 mmHg

C. 634.2 mmHg

D. 886.9 mmHg

If a gas in a closed container is pressurized from 15.0 atm to 16.0 atm and its original temperature was 25 °C, what would be the final temperature of the gas in Kelvin?

A. 279 K

B. 299 K

C. 318 K

D. 338 K

A 2.90 L sample of gas has a pressure of 5.00 atm and a temperature of 50.0 °C. What will be the new temperature if the volume is decreased to 2.40 L and the pressure decreased to 4.00 atm?

A. 214 K

B. 268 K

C. 284 K

D. 302 K

If a 50.0 L container holds 4.50 moles of a gas at a temperature of 473 K, what is the pressure inside the container?

A. 314 kPa

B. 332 kPa

C. 354 kPa

D. 382 kPa

3.00 moles of nitrogen and 4.00 moles of oxygen are placed in a 35.0 L container at a temperature of 298 K. What is the pressure of the resulting mixture of gases?

A. 345 kPa

B. 395 kPa

C. 445 kPa

D. 495 kPa

What is the pressure of the ideal gas when the volume is decreased to

4.0 L and the temperature is increased to 265 K?

pressure= 2.0 atm

volume= 5.0 L

temperature= 215 K

A. 0.32 atm

B. 3.1 atm

C. 5.4 atm

D. 12 atm

A. 8.64 g/mol

B. 58.1 g/mol

C. 78.4 g/mol

D. 106 g/mol

A. 1.8 atm

B. 3.6 atm

C. 7.2 atm

D. 22 atm

What is the molar mass of a gas if a 40.0-gram sample of the gas occupies 11.2 liters of space at STP?

A. 20.0 g/mol

B. 40.0 g/mol

C. 64.2 g/mol

D. 80.0 g/mol