Chemistry, 19.09.2019 20:30 ajbrock1004

1) 1.24 x 10^3 + 1.564 x 10^1
2) 5.8 x 10^3 - 3.156 x 10^2
3) 1.24 x 10^8 / 2.87 x 10^4
4) 8.513 x 10^6 x 5.45 x 10^7
5) 1.24 x 10^3 x 33000
6) 4 x 10^3 + 7.65 x 10^4
7) 1000 + 3.156 x 10^5
8) 5.42 x 10^2 + 3 x 10^5

Answers: 1

Show answers

Answers

Answer from: Fdl52417

Answer :

The answer will be $\Rightarrow 1.24\times 10^4$

The answer will be $\Rightarrow 5.5\times 10^3$

The answer will be $\Rightarrow 4.32\times 10^3$

The answer will be $\Rightarrow 4.64\times 10^{14}$

The answer will be $\Rightarrow 4.1\times 10^{7}$

The answer will be $\Rightarrow 8.05\times 10^4$

The answer will be $\Rightarrow 3.166\times 10^5$

The answer will be $\Rightarrow 3.00\times 10^5$

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.

The rule apply for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

(1) $(1.24\times 10^3)+(1.564\times 10^1)$

$\Rightarrow 1.2415\times 10^4$

In the given expression, 1.24 has 3 significant figures and 1.564 has 4 significant figures. From this we conclude that least precise number present after the decimal point is 2.

Thus, the answer will be $\Rightarrow 1.24\times 10^4$

(2) $(5.8\times 10^3)-(3.156\times 10^2)$

$\Rightarrow 5.484\times 10^3$

In the given expression, 5.8 has 2 significant figures and 3.156 has 4 significant figures. From this we conclude that least precise number present after the decimal point is 1.

Thus, the answer will be $\Rightarrow 5.5\times 10^3$

(3) $\frac{(1.24\times 10^8)}{(2.87\times 10^4)}$

$\Rightarrow 4.3205\times 10^3$

In the given expression, 1.24 has 3 significant figures and 2.87 has 3 significant figures. From this we conclude that 3 is the least significant figures in this problem. So, the answer should be in 3 significant figures.

Thus, the answer will be $\Rightarrow 4.32\times 10^3$

(4) $(8.513\times 10^6)\times (5.45\times 10^7)$

$\Rightarrow 4.6395\times 10^{14}$

In the given expression, 8.513 has 4 significant figures and 5.45 has 3 significant figures. From this we conclude that 3 is the least significant figures in this problem. So, the answer should be in 3 significant figures.

Thus, the answer will be $\Rightarrow 4.64\times 10^{14}$

(5) $(1.24\times 10^3)\times (33000)$

$\Rightarrow 4.0920\times 10^{7}$

In the given expression, 1.24 has 3 significant figures and 33000 has 2 significant figures. From this we conclude that 2 is the least significant figures in this problem. So, the answer should be in 2 significant figures.

Thus, the answer will be $\Rightarrow 4.1\times 10^{7}$

(6) $(4\times 10^3)+(7.65\times 10^4)$

$\Rightarrow 8.0500\times 10^4$

In the given expression, 4 has 1 significant figures and 7.65 has 3 significant figures. From this we conclude that least precise number present after the decimal point is 2.

Thus, the answer will be $\Rightarrow 8.05\times 10^4$

(7) $1000+(3.156\times 10^5)$

$\Rightarrow 3.16600\times 10^5$

In the given expression, 1000 has 1 significant figures and 3.156 has 4 significant figures. From this we conclude that least precise number present after the decimal point is 3.

Thus, the answer will be $\Rightarrow 3.166\times 10^5$

(8) $(5.42\times 10^2)+(3\times 10^5)$

$\Rightarrow 3.00542\times 10^5$

In the given expression, 5.42 has 3 significant figures and 3 has 1 significant figures. From this we conclude that least precise number present after the decimal point is 2.

Thus, the answer will be $\Rightarrow 3.00\times 10^5$

Answer from: Quest

Is there a diagram/picture you can provide? it seems this question goes along with a

Answer from: Quest

A) the enthralling of formation for pure element in its standard state is always positivehope this : )

Another question on Chemistry

Chemistry, 22.06.2019 04:30

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Answers: 1

Answer

Chemistry, 22.06.2019 04:50

Write the overall equation for the reaction for lithium battery

Answers: 2

Answer

Chemistry, 22.06.2019 09:30

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Answers: 3

Answer

Chemistry, 23.06.2019 02:00

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).

Answers: 2

Answer

You know the right answer?

1) 1.24 x 10^3 + 1.564 x 10^1
2) 5.8 x 10^3 - 3.156 x 10^2
3) 1.24 x 10^8 / 2.87 x 10^4<...

Questions

Chemistry, 03.11.2020 03:20

The total amount of energy within an object is called energy....