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rewona [7]
3 years ago
10

How many significant figures are in the measurement 81,140 grams

Chemistry
1 answer:
GrogVix [38]3 years ago
8 0
Answer:

5

Explanation:

In order to be able to say how many sig figs are used for the measurement 811.40 g, you need to know that

<span><span>non-zero digits are always significant</span><span>a trailing zero that follows a decimal point and a non-zero digit is always significant</span></span>

In your case, the measurement

<span>811.40</span>

has four non-zero digits and one significant trailing zero.

<span><span><span>8,1,1,4</span>→</span> non-zero digits<span><span>8,1,1,</span>0→</span> significant trailing zero</span>

Therefore, you can say that this measurement has <span>five significant figures</span>

<span>811.40→</span> <span>five significant figures</span>

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In the reaction between copper sulphate solution and sodium sulphide solution, 15.9 g copper sulphate completely reacts with 7.8
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Answer:

The mass of formed sodium sulphate solution is 14.2 g.

Explanation:

From the given,

Mass of copper sulphate = 15.9 g

Mass of sodium sulphide = 7.8 g

Total mass of reactant  =  Mass of copper sulphate + Mass of sodium sulphide

                                     = 15.9 + 7.8g = 23.7g

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Two significance of melting point
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The significance of melting points are

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<h3>What is melting point?</h3>

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5 0
1 year ago
60 points please help me i will appreciate it!
Elanso [62]

Answer:

\huge\boxed{\sf v = 62.7 \ L}

Explanation:

<u>Given Data:</u>

Mole = n = 3.38 mol

Temp = t = 269 K

Pressure = 1.19 atm

Gas constant = R = 0.08206 L atm K⁻¹ mol⁻¹

<u>Required:</u>

Volume = v = ?

<u>Formula:</u>

Pv = nRT

<u>Solution:</u>

Rearranging formula

\displaystyle v = \frac{nRT}{P} \\\\v = \frac{(3.38)(0.08206)(269)}{1.19} \\\\v = \frac{74.6}{1.19} \\\\v = 62.7 \ L\\\\\rule[225]{225}{2}

8 0
2 years ago
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