Chemistry College

The answer to the problem: (2.1x103) x (4x105) = _____, written to the correct number of significant digits and in scientific notation is:

!! Carat denotes to the power. Example: 10^4 is 104 !!

Answers

Answer 1

Answer:  The answer is [tex]8.4\times 10^8[/tex]

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule apply for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Thus for product of  [tex](2.1\times 10^3)\times (4\times 10^5)[/tex]

In this problem, 2.1has 2 significant figures and 4 is an exact number with infinite significant digits thus product will have the least number of significant figures which is 2. So, the answer will be in 2 significant figures.

Therefore, the answer is [tex]8.4\times 10^8[/tex]

Related Questions

Which of the following is a chemical property?
O volume
O flammability
O color
O weight

Answers

Answer:

your answer is flammability

The waste product of nuclear energy which is a possible pollutant is:
A.smoke
B.hot air
C.radiation
D.heat pollution to lake

Answers

Answer:

CCCCCCC

Explanation:

Answer:

C. radiation

Explanation:

the possible pollutant is radiation  because nuclear energy causes ; electromagnetic waves are radio waves, light, infrared rays, UV rays, X rays, Gamma rays. These are well known and are used extensively in the fields of communications, industry, medicine and research.

Radiation is a term given for waves caused by electromagnetism and high energy particles .Radioactive substances have High energy particles which are tiny bits of matter that are made to move at high speeds releasing nuclear radiation.  There are about 50 naturally occurring radioactive substances and More than 2000 man-made ones. There are three kinds of radioactive radiation – alpha particles, beta particles and gamma radiation.

Please answer!!! Will give brainliest to best answer!!


1. What is the difference between magma and lava?




2. Under what circumstances do large crystals form from a cooling magma?




3. Under what circumstances do small crystals form from a cooling magma?




4. What happens to the mineral particles in salt water when the water evaporates?




5. Explain how halite forms.




6. Explain how mineral veins form.

Answers

Answer:

I can answer 1, lqva is magma outside of the volcano

Perform the following
mathematical operation, and
report the answer to the
appropriate number of
significant figures.
15.673 + 14.752 + 8.4568 = [?]

Answers

Answer:

38.882

Explanation:

For all those Acellus kids XD

A student walks 15 km in 3 hours. What is the student’s average speed?

A :45 km/h
B :5 km/h
12 : km/h
18 : km/h

Answers

Answer:

5 km/h

Explanation:

divide the hours to the distance

B:5 km/h... Divide 15 representing the speed in km/h by 3 the amount of time walked to get your answer of 5km/h
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