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3 years ago

What could you do in an experiment to get more accurate results?

Chemistry

2 answers:

marissa [1.9K]3 years ago

4 0

I believe it’s b, correct me if i’m wrong

alexandr1967 [171]3 years ago

4 0

It will be D because it is always good practice to take more than five recordings/results/observations so that if you realize that the results vary a bit, you can find the average.

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Which of the following is a clue that something is pseudoscience?

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3 years ago

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3 years ago

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4 years ago

What does the term "basic unit of matter" refer to?

MArishka [77]

Vas happenin
Hope your day is going well
Atoms are referred to basic unit of matter
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3 years ago

Read 2 more answers

Binary compound of oxygen and an unknown element,X, has the formula XO2 and is 69.55 mass % oxygen, what is the weight of elemen

marissa [1.9K]

Answer:

Weight of element X = 14.01 gram

Explanation:

Mass percentage is calculated by using :

$Percent =\frac{Mass\ of\ element}{Total\ mass}\times 100$

$O\ Percent=\frac{Mass\ of\ O}{Total\ mass\ of\ XO2}\times 100$

Mass of O = 16.0 gram

let mass of X = X grams = ?

Mass of XO2 = mass of X + 2(mass of O)

Mass of XO2 = X + 2(16)

Mass of XO2 = X + 32

Total mass of O in the compound = 2(16) = 32 grams

Percent O = 69.55 %

$Percent\ O =\frac{Mass\ of\ O}{Total\ mass\ of\ XO2}\times 100$

$69.55=\frac{32}{X+32}\times 100$

$\frac{69.55}{100}=\frac{32}{X+32}$

$0.6955=\frac{32}{X+32}$

$0.6955\times (X+32)=32$

$0.6955X+ 22.256=32$

$0.6955X=9.744$

$X=\frac{9.744}{0.6955}$

$X =14.01$

weight of element X = 14.01 gram

14.01 is mass of nitrogen N

The correct formula of this element is NO2

6 0

3 years ago