Chemistry » Page 7

Chemistry

Emery Phelps

Zn + Cl2 - ZnCl2

What is the type of reaction

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Chemistry

Tia Andrade

As an atom becomes an ion, its mass number (1) decreases (2) increases (3) remains the same

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Chemistry

Denzel Boyd

Which of the following is not an example of a mineral crystal shape?

a. Kryptonite

b. Pyrite

c. Quartz

d. Calcite

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Chemistry

Mina Beltran

A graduated cylinder is filled to the 40.00-mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966 g and 159.446 g, respectively. In a separate experiment, a metal ball bearing of mass 18.713 g is placed in the cylinder and the cylinder is again filled to the 40.00-mL mark with the mineral oil. The combined mass of the ball bearing and mineral oil is 50.952 g. Calculate the density and radius of the ball bearing (volume of a sphere of radius r is 4/3Ïr^3

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Chemistry

Nico Leon

You need 180 mL of a 25% alcohol solution. On hand, you have a 30% alcohol mixture. How much of the 30% alcohol mixture and pure water will you need to obtain the desired solution?

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Chemistry

Izayah Cuevas

What atoms react not naturally

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Chemistry

Oscar Weber

How are the speed velocity and acceleration of a moving object related?

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Chemistry

Rodney Sweeney

Explain why an alloy is a type of solution. Why are alloys sometimes used instead of pure metals?

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Chemistry

Andrea Shields

Which of the following is true about the relationship between the energy gap (DE) between the spin states for a 1H nucleus and the strength of the external magnetic field? A. they are inversely proportionalB. they are directly proportionalC. there is no relationshipD. the magnetic field is slightly lessE. none of these

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Chemistry

Isai Lowery

2 H2 (g) - > 2 H2O (g)

Calculate the mass of oxygen gas, O2, required to produce 12.90 moles of water, H20

Molar mass H2 = 2.016 g/mol

Molar mass O2 = 32.00 g/mol

Molar mass = 18.02 g/mol

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Chemistry

Holmes

What element must combine with the metal for oxidation to take place?

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Chemistry

Reese Stanley

Which of the following explain the variations in solubility for methane, ethane, and ethylene?

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Chemistry

Martha Clay

Describe how birds and reptiles both reproduce. describe two ways that birds and reptiles differ. use two particular animals as example in your description

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Chemistry

Goonie

Substances that are likely to disassociate in water

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Chemistry

Alyssa Hansen

An atom has 10 protons, ten neurons and ten electrons. What is the mass of that atom in u unit?

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