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Misha Larkins [42]
3 years ago
9

Choose the number of significant figures 60.0

Chemistry
2 answers:
GenaCL600 [577]3 years ago
8 0

Answer:

3 significant figures

Explanation:

The rules for deciding which digits in a measurement are significant are as follows:

1) All nonzero digits are significant.

2) Sandwiched (or embedded) zeros, those between significant digits, are significant.

3) Leading zeros, which are zeros at the beginning of a decimal number less than 1, are not significant.

4) Trailing zeros, which are zeros at the end of a number, are significant only if the number has a decimal point.

By rule 4 since 60.0 has a decimal point all 3 figures are significant

oksian1 [2.3K]3 years ago
4 0

 

In this case there are 3 significant figures.

Any zeroes after another number, (i.e. 9300.000), you consider these numbers.  

If there is something like 0.0060, this would be two significant digits.  

Zeroes before a number are not significant, anything after are.  

Hope this helps any confusion!


Please mark me brainliest!

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Answer: 4.18925 kJ heat is needed to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

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\Delta T_2 = 223 K - 159 K  = 64 K

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Q_1+Q_2=509.25 J+3680 J=4189.25 J=4.18925 kJ (1kJ=1000J)

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