Chemistry » Page 29

Daniella Larson

Chemistry

What is the full form of PVC

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Chemistry

What happens when the land in the sea warm-up at different rates during the day

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Chemistry

Increasing which variable would decrease the pressure of a contained gas?

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Chemistry

How many moles of h2o are produced when using 7 moles of h2

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Chemistry

A 25 mL sample of 0.100 M HNO3 completely reacts with NaOH according to this equation:

HNO3 (aq) + NaOH (aq) → NaNO3 (aq) + H2O (1)

How many moles of HNO3 are in the sample?

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Chemistry

What does diatonic means

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Jaxson Blackwell

Chemistry

A general term for an attractive force that holds two atoms together is known as an

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Chemistry

Which law is known as the law of action-reaction

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Chemistry

7. A 2.0 L container had 0.40 mol of He (g) and 0.60 mol of Ar (g) at 25°C.

Which gas has a greater average kinetic energy?

Which gas is traveling at a higher average speed?

If Ar has an average speed of 431 m/s, what is the average speed of He?

What is the total pressure in the container?

What are the partial pressures of He and Ar?

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Chemistry

Which of the following will allow more solute to be dissolved in a solvent? Choose all that apply. *

Adding more solute

Cooling the solution

Agitating the solution

Adding heat

Using larger crystals

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Chemistry

Calculate the average bond order for a p-o bond (such as the one shown in blue) in a phosphate ion.

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Chemistry

Match the vocabulary terms to their definitions.

1. standard metric unit of length

mass

2. a proposed explanation for a scientific problem

hypothesis

3. standard unit of volume

liter

4. the curved top surface of a liquid column

control

5. a quantity in an experiment that remains unchanged or constant

meter

6. amount of matter in an object

meniscus

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Chemistry

The speed at which any planet moves through space is constantly changing. In a perfectly circular orbit, the orbital radius of the planet would be constant and therefore so would be its observed angular velocity. In elliptical orbits, the angular velocity varies. In elliptical orbits, the orbital radius of the satellite will vary and therefore so will its angular velocity. The planet travels "faster" (greater angular velocity) when closer to the Sun, then "slower" (less angular velocity) at a more distant radius.

According to Newton's 2nd Law, what is the underlying force behind this change in velocity?

A) Mass

B) Gravity

C) Friction

D) Projectile motion

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Chemistry

How many electrons are in an atom of elemental sodium?

A) equal to the number of neutrons

B) equal to the number of protons

C) equal to the number of protons and neutrons

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Chemistry

During which era did mosses, ferns, and conifers first appear? 8.

e. 6A. 1 * cenozoic mesozoic paleozoic

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