Chemistry High School

how are fossils discovered​

Answers

Answer 1
Most of the time, fossils are only partially uncovered on site. They are removed individually or in blocks and often protected by plaster jackets before being taken back ...

Related Questions

Energy is released when the nucleus of an atom splits and two smaller atoms are formed. What is the name of this process?

A. Electricity

B. Nuclear Fusion

C. Positron Particles

D. Nuclear Fission

Answers

Explanation:

It's (D), nuclear fission................

PLEASE HELP

If I put more air in a car tire, which relationship does it show?
a. pressure and volume
b. temperature and volume
c. amount of gas and pressure
Selected: d. temperature and pressure

Answers

Answer:

amount of gas and pressure

How many calories are absorbed in a process that absorbs 0.128 joules?
A. 0.031 cal
B. 0.536 cal
C. 536 cal
D. 0.310 cal

Answers

The answer is a - round up 0.0305 to 0.031

Given the following equation: Na2O + H2O ---> 2 NaOH
How many moles of NaOH are produced from 1.02 moles of Na2O?

Answers

Answer:

2.04 moles

Explanation:

Since the ratio of Na2O to NaOH is 1:2, you multiply the number of moles by 2, equaling 2.04 moles.

(PLEASE HELP) 500 mL of a gas is collected at 745 mmHg. What will the volume be at 1.8 atm?

Answers

Answer:

272.22 mL

Explanation:

The new volume can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we're finding the new volume we have

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

First convert 745 mmHg to atm

760 mmHg = 1 atm

745 mmHg = 745/760 = 0.98 atm

We have

[tex]V_2 = \frac{500 \times 0.98}{1.8} \\ = 272.222...[/tex]

We have the final answer as

272.22 mL

Hope this helps you

Atoms that have become negatively charged by gaining extra electrons are called

Answers

Answer:

CATION

Explanation:

If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.






A cylinder is filled with 10.0 L of gas and a piston is put into it. The initial pressure of the gas is measured to be 273. kPa.
The piston is now pulled up, expanding the gas, until the gas has a final volume of 50.0 L. Calculate the final pressure of the gas. Be sure your answer has the
correct number of significant digits.

Answers

P2 = 54.6 kPa

Explanation:

Given:

V1 = 10.0 L. V2 = 50.0 L

P1 = 273 kPa. P2 = ?

We can use Boyle's law to solve this problem.

P1V1 = P2V2

Solving for P2,

P2 = (V1/V2)P1

= (10.0 L/50.0 L)(273 kPa)

= 54.6 kPa

Which phrase describes a volcano that is not expected to erupt again?

1 quiet volcano
2 extinct volcano
3 dormant volcano
4 explosive volcano

Answers

quiet volcano extinct volcano dormant volcano explosive volcano.

Answer:

Extinct

Explanation:

Extinct volcanos are not expected to erupt, and have not erupted in a very long time.

The saturation point for a solution is 50.0 grams of solute per 500 grams of solvent. How many grams of solute can be dissolved in 800. grams of solvent?
Plz help me

Answers

Answer:

I think it can dissolve 80.0 grams

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