We calculate as follows:
We first change <span>the percentages to mole fractions by moving the decimal two places to the left.
</span>N-14 (14.003amu)(0.99632) = 13.9515amu
<span>N-15 (15.000amu)(0.00368) = 0.0552amu
</span>
Total = <span>14.0067 amu -------> OPTION B
Hope this answers the question. Have a nice day.
</span>
Answer:
1·199 J
Explanation:
Given
Mass of water = 0·814 g = 0·814 × 
kg
Increase in temperature = 0·351 °C
Let the amount of heat added be Q J
Formula for heat added is
<h3>Q = m × s × ΔT</h3>
where Q is the amount of heat transferred
m is the mass
s is the heat capacity
ΔT is the change in temperature
Heat capacity of water = 4200 J/kg °C
Applying the formula for heat added
Q = 0·814 × × 4200 × 0·351 = 1·199 J
∴ Amount of heat added = 1·199 J
57.0 is it rounded to three sig figs. You count three spaces then round from there, which would be the zero and you would round down because the four is there.
Answer: D
Explanation:
because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can
Seas are smaller than oceans. Oceans are where land and water meet, and are usually bigger.
