Chemistry » Page 24

Chemistry

Royce Gould

Identify the main source of energy used by most organisms

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Chemistry

Norah Montoya

Write a net ionic equation to show that codeine, c18h21o3n, behaves as a bronsted-lowry base in water.

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Chemistry

Kyle Braun

What is the name of the hybrid orbitals used by chlorine in clf3?

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Chemistry

Nicolas Savage

Which one is correct

A. It allowed them to escape

B. It allowed them to chase down

C. It allowed them to reach food

D. All of these

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Chemistry

Angelique Randolph

Boron is one position to the left of carbon on the periodic table. the atomic number of carbon is 6. given its position on the periodic table, what is the atomic number of boron

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Chemistry

Hobbes

Actions of the non-valence electrons, diluting the force of the attraction between nucleus and valence electrons is called

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Chemistry

Shayna

Which statements accurately describe the greenhouse effect? Check all that apply.

It is caused by liquids on Earth's surface.

It is caused by gases in Earth's atmosphere.

It warms up Earth's surface and the lower atmosphere.

It cools down Earth's surface and the lower atmosphere.

It maintains Earth's normal atmospheric pressure.

It maintains Earth's normal range of temperatures.

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Chemistry

Arnie

How is geothermal produced

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Chemistry

Jayson

B2O3 (s) + 3C (s) + 3Cl2 (g) - - - > 2 BCl3 (g) + 3CO (g)

Calculate how many moles of BCl3 are produced from the reaction of 61.0g of B203?

A. 1.75 mol

B. 0.0150 mol

C. 51.3 mol

D. 211 mol

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Chemistry

Darrell Meyer

A gas has a volume of 10 L at 0 C what is the final temperature of the gas if it volume increases to 25L

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Chemistry

Deangelo Vargas

Are specimens the best source of DNA

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Chemistry

Andre Henderson

Given the solubility, calculate the solubility product constant (ksp) of each salt at 25°c: (a) ag2so3, s = 4.6 * 10-3 g/l; (b) hg2i2, s = 1.5 * 10-7 g/l; (c) zn3 (po4) 2, s = 5.9 * 10-5 g/l.

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Chemistry

Bullwinkle

Why does ionization energy tend to increase as you move across a period

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Chemistry

Baby Cakes

Why does the rate of a reaction generally increase with increased temperature? (Choose all that apply)

A.

at higher temperatures, molecules are more likely to collide with each other in the correct orientation.

B.

at higher temperatures, molecules will collide more often.

C.

at higher temperatures, the potential energy difference between reactants and products is smaller.

D.

at higher temperatures, more of the collisions will have the required activation energy.

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Chemistry

Demarion Morris

What is the wavelength of microwaves of 3.0x109 Hz frequency? c = 3.0x108 m/sec

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