Chemistry » Page 75

Chemistry

Emiliano

What is the formula of titanium (II) oxide? (1) TiO (3) Ti2O (2) TiO2 (4) Ti2O3

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Chemistry

Rory Bowman

How many atoms are in 1.60 moles of lithium hydroxide

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Chemistry

Mason Robinson

Why do scientific experiments need controls?

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Chemistry

Rayne Hardy

What is the maximum amount of Ca3 (PO4) 2 that can be prepared from 9.80 g of Ca (OH) 2 and 9.80 g of

H3PO4

Ca (OH) 2 (s) + H3PO4 (aq)

Ca3 (PO4) 2 (aq) + H2O (1)

balance the equation 1st.

O 6.80 g

O 15.5 g

O 8.60 g

o 13.7 g

O 10.3 g

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Chemistry

Gavyn Gentry

What happens to energy when Sally kicks a soccer ball?

A. Kinetic energy is transformed to chemical energy in muscles.

B. Potential energy is transformed to chemical energy in muscles.

C. Kinetic energy is transferred from the leg to the soccer ball.

D. Potential energy is transferred from the leg to the soccer ball.

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Chemistry

Violet Bartlett

How many valence electrons are in a neutral lithium atom

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Chemistry

Janae Levine

Which statement about genes is always true?

1. Each gene is responsible for a single

2. Many genes are required to determine

a single trait

3. Genes are located on chromosomes

within the cell nucleus

4. Both inherited traits and acquired

traits are determined by genes

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Chemistry

Clark Hoffman

A sample of benzene was vaporized at 25◦C. When 37.5 kJ of heat was supplied, 95.0 g of the liquid benzene vaporized. What is the enthalpy of vaporization of benzene at 25◦C?

1. 30.8 kJ/mol

2. 13.4 kJ/mol

3. 43.0 kJ/mol

4. 6.09 kJ/mol

5. 25.6 kJ/mol

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Chemistry

Alessandra Reilly

Which of the following choices is the most conclusive in determining whether a chemical reaction has taken place?

a change in color

a change in odor

a gas was formed

a change in the identity of the substance (s)

If different products are not created during a process, then a chemical reaction has not occurred. True or false?

Chemical equations provide:

the physical state of each reactant and product.

the ratios of reactants and products.

the chemical identity of the reactants and products.

all of the above information

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Chemistry

Terrance Sampson

The strength of dispersion forces depends on what characteristic in the molecule?

a) Polarizability of charge distribution

b) Electronegativity between atoms

c) Bond strengths between atoms

d) Bond lengths between atoms

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Chemistry

Yin

The osmotic pressure of 9.69 * 10-3 M solutions of CaCl2 and urea at 25°C are 0.585 and 0.237 atm, respectively. Calculate the van't Hoff factor for the CaCl2 solution.

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Chemistry

Adison Holland

Which mineral would most likely be found in a necklace

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Chemistry

Madison Cardenas

How do you determine the number of atoms in a model of a compound

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Chemistry

Gavyn Crane

What is the rate of acceleration of a 2,000-kilogram truck if a force of 4,200n is used to make it start moving forward?

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Chemistry

Casey Friedman

How much energy is needed to warm 13.0 milligrams of water at 1.0 degrees Celsius to 75.00 degrees Celsius. Is this process endothermic or exothermic

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