The first rule is to use four digits in atomic weights and consider the calculated formula or molar mass as given with four significant digits. This rule is appropriate for beginners but has some disadvantages.
The second rule is to use all digits in the recommended atomic weights and to estimate the accuracy of the result from the number of decimal places or significant digits in these.
The third rule is to use all digits in the recommended atomic weights and to calculate the absolute maximum uncertainty of the result from the recommended uncertainties of the atomic weights. The uncertainty is rounded up to one (two) significant digit(s), and the formula or molar mass is rounded to the same absolute accuracy as the rounded uncertainty.
The answer is C.
A solution is a substance in which one component is evenly mixed in another
The heat required to vaporize 650 grams of liquid with a heat of vaporization of 723 joules/grams is 470,000 J ( answer E)
<u><em>calculation</em></u>
Heat (Q) = m Hv where,
m(mass)= 650 g
HV( heat of vaporization) = 723 J/g
heat is therefore = 650 g x 723 J/g =469950 J
round off 469950 j into nearest 10,000 = 470,000 J ( answer E)
Answer:
Look at my answer to the last one, and see if you can solve this one on your own!
After you try it, I can let you know if you got it right :)
Answer:
312.731
Explanation:
it had a long answer but im sure ur teacher wanted u to round it
hope this helps!
~goldfishareswag/brianna
:)