CHEMISTRY HIGH SCHOOL

What volume do 4.96 moles of O2 occupy at STP?

Answers

Answer 1
Answer:

Answer: Step 1: List the known quantities and plan the problem. Known. 4.96 moles O2; 1 mol = 22.4

Explanation: I hope that helped.

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If 2a=3b and a=6 then b=

Answers

then b is 4

2a=3b since a=6

2x6=3b

12=3b

b=12/3

b=4

Answer:

b=4

Explanation:

2a=3b

2a=2*6

2*6=12

2a=12

12=3b

12/3=4

b=4

Freezing requiresa. the removal of energy.
b. the absorption of energy.
c. no energy change.

Answers

Answer:

The correct answer is option a. the removal of energy.

Explanation:

Hello!

Let's solve this!

Freezing is a process by which a lot of heat is lost, this loss of heat leads to a loss of energy as well. It means that energy is eliminated so that heat loss occurs.

Therefore the correct answer is option a. the removal of energy.

Which description is NOT a characteristic of the nucleus of an atom? a. always contains the same amount of protons and neutrons b. contains uncharged particles c. positively charged d. accounts for most of the atom's mass

Answers

The answer would be A

What is the role of an enzyme? a. speeds up biochemical reactions b. causes biochemical reactions c. is a product in biochemical reactions d. provides extra heat for biochemical reactions

Answers

A. But the best term to use is 'speeds up and biological reaction' - (in chemistry), and a catalyst 'speeds up a chemical reaction' - (in chemistry)

What organisms appeared on Earth First?a). gastropods
b). horn corals
c). brachiopods
d). crinoids

Answers

it is B because horn coals are bigger and I read it in a book

Chapter 2.4.1. The ______ energy lost by the inward movement of nickel-iron within a differentiating molten planetary body would be converted first into _______ energy and then into ______ energy. a. momentum, thermal, gravitational b. gravitational, kinetic, thermal c. thermal, momentum, kinetic d. kinetic, thermal, gravitational

Answers

Answer:b. gravitational, kinetic, thermal

Explanation:

The above explains the mechanism of the core forming process on earth/planet.

It is believed that this process might has contributed significantly to a planet's early stages heating. The time when these core-forming event happened is thought to have been mainly completed very early when Earth was young . The type of this event rather than it being seen as a single catastrophic event, it is likely to have been as a result of contractions on the earth severally.

The addition of partially differentiated material from another giant impact the rate of this spasm , and it increases each time the planet's mass is to increased.

This is a little on the history of planetary evolution.
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