Chemistry » Page 43

Chemistry

Julia Hess

Classify each substance as either a mixture or a pure substance.

Chlorine

water

air

brass

coffee

olive oil

copper

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Chemistry

Guest

How many moles of HBr are present in 250 ml of a 0.15 M HBr solution?

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Chemistry

Andreas Fuentes

What is the proper solution to the following equation? Answer with correct significant figures. (23.1 + 5.61 + 1.008) * 7.6134 * 8.431 =

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Chemistry

Oconnell

What is the common name of H2O

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Chemistry

Quinn Adams

Which statement is true?

-The earth has a stronger gravitational pull than the Sun because it is smaller in mass.

-Planets would travel in a straight line if it weren't for the force of the Sun's gravity.

-The Sun's gravitational pull is weaker on planets that are closer to it.

-The elliptical path of planets is described by Newton's 1st law of motion.

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Chemistry

Rayan Knight

When are multiple bonds needed in a lewis structure?

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Chemistry

Reece Nixon

What is the most radioactive elemnt on the periodic table

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Chemistry

Desiree Baxter

A kilogram is an SI unit. Which quantity might you measure in kilograms? temperature

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Chemistry

Ruben Richard

Contrast the bonds that are formed from diatomic chlorine and diatomic oxygen.

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Chemistry

Michelle Beck

2. What effect does amount of water have on plant growth?

Independent variable:

Dependent variable:

3. Does a student's bedtime effect a student's energy level?

Independent variable:

Dependent variable:

4. What effect does exercise have on strength?

Independent variable:

Dependent variable:

5. Does a person's height effect their ability to play basketball?

Independent variable:

Dependent variable:

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Chemistry

Kathy Hodges

Which formulas represent two polar molecules?

(1) CO2 and HCl (3) H2O and HCl

(2) CO2 and CH4 (4) H2O and CH4

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Chemistry

Cuddles

A 25 milliliter sample of HNO2 (aq) is neutralized by 32.1 milliliters of 0.150 M KOH (aq). What is the concentration of the acid

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Chemistry

Teagan Sanchez

Chloroform, CHCl3, reacts with chlorine, Cl2, to form carbon tetrachloride, CCl4, and hydrogen chloride, HCl. In an experiment 25 grams of chloroform and 25 grams of chlorine were mixed. Which is the limiting reactant? What is the maximum yield of CCl4 in moles and in grams?

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Chemistry

Ariana Holloway

Label the parts of this wave. A: B: C: D:

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Chemistry

Zaniyah Porter

The capacity of a muscle to continue contracting over a period of time without fatigue is called:

A. muscular strength.

B. muscular endurance.

C. cardiovascular endurance.

D. power.

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