Chemistry » Page 11

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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Chemistry

Judith Malone

How many electrons are in an atoms of germanium

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Chemistry

Gaige Campbell

What is the lewis structure of N2O3?

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Chemistry

Jimmuy

Which electrical circuit is designed to produce light?

A) an MP3 player

B) a generator

C) a flashlight

D) an air conditioner

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Chemistry

Mcgrath

Describe the difference between a monoprotic acid and a triprotic acid. How does a triprotic acid generate hydrogen ions?

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Chemistry

Pierre

Which of the following do scientists use to form a hypothesis?.

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Chemistry

Hallie

How many moles of carbon are in 7.87x10^7 carbon molecules?

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