Chemistry » Page 5

Chemistry

June Donovan

What is x + 4 = - x - 4?

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Chemistry

Jennifer Rubio

How many neutrons are in 7.00 g of 13c?

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Chemistry

Welch

This chart shows discrpitions of the atoms for four different substances. Which substance is a solid

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Chemistry

Rylee Glover

What is habitat destruction?

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Chemistry

Fletcher Benson

Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall. In her experiment, which of the following factors should Nancy make sure that she does not change?

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Chemistry

Kianna Grant

What is the function of the ribosome

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Chemistry

Mariela Mcintyre

How much energy, in joules, does 150.0 g of water with an initial temperature of 25 C need to absorb be raised to a final temperature of 75 C

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Chemistry

Rene Owens

What mass of oxygen is contained in a 5.8 g sample of NaHCO3?

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Chemistry

Maximo Rollins

Which statement correctly compares the number of chromosomes in a body cell to that in a sex cell of humans?

A. A body cell has 21 chromosomes; a sex cell has 23

B. A body cell has 21 chromosomes; a sex cell has two

C. A body cell has 46 chromosomes; a sex cell has 23

D. A body cell has 46 chromosomes; a sex cell has two

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Chemistry

Amelie

Halocarbons contain carbon, hydrogen, and atoms from which set of elements?

1. lithium, sodium, and potassium

2. nitrogen, oxygen, phosphorus, and sulfur

3. nitrogen, oxygen, and fluorine

4. fluorine, chlorine, bromine, and iodine

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Chemistry

Sable

List at least 3 factors that can influence a body's temperature after death.

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Chemistry

Belen Dixon

How many grams of water form when 1.24 l of gas h2 at stp completely reacts with o2?

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Chemistry

Kendal Wade

According to the following reaction, how many grams of hydrogen peroxide (

H

2

O

2

) are necessary to form 0.182 moles oxygen gas?

hydrogen peroxide (

H

2

O

2

) (aq)

→

water (l) + oxygen (g)

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Chemistry

Skyler Mcintosh

Using the bohr model describe the changes in electrons energy and electron location when an atom changes from the ground state to an excited state.

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Chemistry

Peyton Carlson

Sally is making a model of gold for her chemistry class. She has foam balls for the protons, neutrons, and electrons. She has added 70 protons to her model so far. How many more protons does she need to add to complete her neutral atom of gold?

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