I believe the correct answer would be the first option. It is 100 mL graduated cylinder that is the best apparatus that could be used. It has the smallest graduation as compared to the other choices. It can measure up to 0.1 mL.
Answer: 0.43molO₂
Explanation:
The ideal gas law for moles is 
. If you did not know, R is the ideal gas constant, 
.
Since the temperature must be in Kelvin, we must convert our given temperature from ℃ to K. 
Now that we have the temperature converted to Kelvin, we can plug in our information to the ideal gas law for the number of moles.
Therefore, the number of moles is 0.43molO₂.
I hope this helps! Pls mark brainliest!! :)
Answer:
By definition, there are 6.022×1023 such molecules, or NA such molecules in ONE mole of water. And thus in such a quantity there are NA oxygen atoms, and 2×NA hydrogen atoms...and the mass associated with this numerical quantity of water molecules is approx. 18⋅g ...
Answer: If a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
Explanation:
According to the standard conversion,
Therefore, 675,000 Joules will be converted into kcal as follows.
Thus, we can conclude that if a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
Answer:
92.8%
Explanation:
Step 1: Given data
- Mass of lead in the bullet (mPb): 11.6 g
- Mass of tin in the bullet (mSn): 0.5 g
- Mass of antimony in the bullet (mSb): 0.4 g
Step 2: Calculate the total mass of the bullet
The total mass of the bullet is equal to the sum of the masses of the elements that form it.
m = mPb + mSn + mSb = 11.6 g + 0.5 g + 0.4 g = 12.5 g
Step 3: Calculate the mass percentage of Pb in the bullet
We will use the following expression.
%Pb = mPb / m × 100%
%Pb = 11.6 g / 12.5 g × 100% = 92.8%
