Chemistry » Page 48

Chemistry

Semaj Khan

Oxygen and copper are examples of what?

Two substances with identical atoms.

Two different molecules.

Two different elements.

Atoms that can't combine to form compounds.

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Chemistry

Kamari Blake

In this group, which percentage does the green seed

represent?

25%

50%

75%

100%

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Chemistry

Frida Shaffer

When working on a project, a scientist discovers that some of the data she was basing her research on was not accurate. In this situation, what should the scientist do?

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Chemistry

Gauge Shah

What happens to a neutral atom when an electron leaves

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Chemistry

Trystan Klein

How is the kinetic energy of the particles of a substance affected during a phase change?

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Chemistry

Ruby Krause

Which sample is a pure substance?

a test tube of zinc oxide

a container of zinc and oxygen

a flask of pond water

a jar of soil

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Chemistry

Leonardo Brandt

What is an octet of electrons and which elements contain an octet of electrons?

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Chemistry

Rowan Lee

What is the mass of the helium nucleus?

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Chemistry

Stephen Decker

What is a ion?

A. An atom with a different number of neutrons

B. An atom with a positive or negative charge

C. A molecule whose name has no charge

D. A molecule that does not have any bonds

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Chemistry

Karina Miranda

This formula equation is unbalanced.

P4 (s) + Cl2 (g) PCl3 (l)

Which coefficient should be placed in front of PCl3 to balance this equation?

124 6

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Chemistry

Lesly

If a gas has an initial pressure of 101kPa and a volume of 10L, then it expands to a volume of

20L what is the new pressure?

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Chemistry

Clara Ball

Which acid has the formula hno2? hydronitric acid hydronitrous acid nitric acid nitrous acid hydornitridic acid

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Chemistry

Dario Booker

How can you make clay float in water?

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Chemistry

Broderick Wagner

Molar mass of Fe2O3 = g/mol

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Chemistry

Bentley Frey

What is the mass of 1.91 x 1023 C6H12O6 molecules?

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