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Chemistry

A room measures 15.0 ft in width and 12.0 ft in length. All of the walls are 9 ft high. If 1 gallon of paint will cover 374 ft^2 per coat of paint, how many gallons of paint would you need to purchase to paint the room with two coats of paint?

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Chemistry

What mass (in g) of NH3 must be dissolved in 475 g of methanol to make a 0.250 m solution?

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Chemistry

Water has one of the largest specific heats of any substance why is this important

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Chemistry

Jack consumes two slices of pizza and drinks two large glasses of soda. Half an hour later, he complains of a stomachache. What is the most likely reason for Jack's upset stomach?

a) Soda and lactose from the cheese combined and slowed enzyme activity.

b) Soda mixed with the pizza sauce and sped up digestive enzyme activity.

c) Soda raised the pH in his stomach and sped up digestive enzyme activity.

d) Soda lowered the pH in his stomach and slowed digestive enzyme activity.

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Chemistry

Name 2 ways forelimbs are different than hind limbs.

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Chemistry

Which of the following would be considered a solution? salt in the sugar bowl sugar added to water oil added to water any fat-soluble substance mixed with any water-soluble substance

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Chemistry

how to Explain the importance of an environmental contingency plan.

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Chemistry

What is catalysis and what does a catalyst do to the activation energy of a reaction, and to the rate of the reaction. Does a catalyst change the nature of the products of the reaction? If a reaction is in equilibrium, does adding a catalyst shift the equilibrium?

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Chemistry

Which of the following increases the average kinetic energy of colliding particles

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Chemistry

How do you express a number in scientific notation?

A write the number in units of Avogadro's number

B write the number as a fraction in scientific equation

C write the number along with the units associated with it

D writh the number as a decimal multiplied by a power of 10

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Chemistry

A new element has two isotopes, one with a mass of 40.0 amu and the other with a mass of 42.0 amu. the atomic weight is 40.50 g/mol. pick the true statement a. the isotope at 42.0 amu is less abundant b. the element has 19 protons and 21 neutrons c. the isotope at 40.0 amu is less abundant d. both isotopes are equally abundant e. the element has 20 protons and 21 electrons f. there is not enough information given g. the element is calcium

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Chemistry

What are some advances in genetics

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Chemistry

If the substance in the diagram was heated to "T2," what is happening if the substance is allowed to approach T1?

Select all that apply.

The average kinetic energy is decreasing.

The average kinetic energy has increased.

The highest energy level has decreased.

Fewer molecules would have a lower energy level.

More molecules have a higher energy level.

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Chemistry

When you pass the foodstall you can smell what is cooking, explain why this happen by particle theory

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Chemistry

Which of the followinWhich term describes this reaction? Upper C upper H subscript 3 upper B r (a q) plus upper O upper H superscript minus (a q) right arrow upper C upper H subscript 3 upper O upper H (a q) plus upper B r superscript minus (a q). addition condensation elimination substitutiong best states the difference between an alcohol and an ether? In an alcohol, a carbon atom is double bonded to an oxygen atom; in an ether, a carbon atom is triple bonded to another carbon atom. In an ether, a carbon atom is double bonded to an oxygen atom; in an alcohol, a carbon atom is triple bonded to another carbon atom. In an alcohol, a carbon atom is single bonded to a hydroxide group (OH-); in an ether, an oxygen atom is single bonded to two carbon atoms. In an ether, a carbon atom is single bonded to a hydroxide group (OH-); in an alcohol, an oxygen atom is single bonded to two carbon atoms.

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