Chemistry » Page 102

Chemistry

Raelynn Faulkner

If the atomic radius of aluminum is 0.143 nm, calculate the volume of its unit cell in cubic meters.

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Chemistry

Gina Martinez

Write the ion symbol for an atom with the given number of protons and electrons.

a. 35 protons and 36 electrons

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Chemistry

Kenneth

Why do the compass needles change direction when the electric current is flowing? A. The electricity is flowing through the compass needles, causing them to turn toward the wire. B. The Earth's magnetic field changes direction while the electricity is connected. C. The compasses create their own electric field, which forces their needles to rotate. D. The current creates a magnetic field that exerts a force on the compass needles.

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Chemistry

Fitzpatrick

Explain how he sun causes the weather

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Chemistry

Julissa Jensen

Which of these statements would be true if the water molecule was linear instead of bent? check all that apply?

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Chemistry

Desiree Bates

Why do ionic compounds conduct electricity when dissolved in water?

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Chemistry

Alondra Santos

Biological oxidation-reduction reactions always involve:

a. direct participation of oxygen.

b. transfer of electron (s).

c. mitochondria.

d. transfer of hydrogens.

e. formation of water.

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Chemistry

Claire Riddle

What is conserved in physical changes

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Chemistry

Meghan Cortez

Which statement about neutrons is true?

A. Neutrons travel around the nucleus of an atom.

B. The number of neutrons in an atom always equals the number of electrons. C. Neutrons have less mass than electrons.

or

D. A neutron has no charge.

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Chemistry

Makayla Greene

Of these gases, which has the fastest-moving molecules (on average) at a given temperature?

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Chemistry

Tristan Patterson

What is the oxidation number for zinc? How does zinc's electron configuration account for this oxidation number?

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Chemistry

Kali Martin

Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed?

A. Less than 1% of the alpha particles went un-deflected through the gold foil.

B. Less than 1% of the alpha particles were deflected by angles greater than 90°.

C. The beam from the negative electrode was deflected by electrically charged rods.

D. The beam from the negative electrode cast a shadow on the positive electrode.

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Chemistry

Ann Mitchell

Calculate the energy E of a sample of 3.50 mol of ideal oxygen gas (O2) molecules at a temperature of 310 K. Assume that the molecules are free to rotate and move in three dimensions, but ignore vibrations.

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Chemistry

Karlee Lyons

Gasohol is a fuel containing ethanol (c2h6o) that burns in oxygen (o2) to give carbon dioxide and water.

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Chemistry

Guest

What type of rock does the ocean floor consist of?

1 Igneous basalt rock

2 Igneous granite rock

3 Sedimentary rock

4 Metamorphic rock

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