Glve the number of significant figures in this number: 40

Chemistry

2 answers:

trapecia [35]2 years ago

4 0

Answer:

the number of significant figures in this number is two because <u>non-zero digits are always significant and a final zero or trailing zero is always counted</u>

Explanation:

i hope this will help you :)

Eddi Din [679]2 years ago

3 0

Answer:

only 4 is the significant figure

we take tailing zeroes as significant figures only in case of decimals

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An aerosol can with a temperature of 292 K and a pressure of 1.25 atm was left outside in the sun on a hot summer day. The press

garik1379 [7]

Answer:

310.69K

Explanation:

Given parameters:

Initial temperature T₁ = 292K

Initial pressure P₁ = 1.25atm

Final pressure P₂ = 1.33atm

Unknown:

Final temperature T₂ = ?

Solution

To find the unkown, we need to apply the combined gas law. From the combined gas law, it can be deduced that at constant volume, the pressure of a give mass or mole of gas varies directly with the absolute temperature.

Since the same aerosol can is heated, the volume is constant.

$\frac{P_{1} }{T_{1} }$ = $\frac{P_{2} }{T_{2} }$