Answer:325 mL of acid
Explanation:250 mL + 75 mL = 325 mL
Answer:
65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large
deposit of dust that contained substances only found in asteroids, What most likely killed off the dinosaurs?
Explanation:
<u>Answer:</u> The percentage abundance of 
and 
isotopes are 75.77% and 24.23% respectively
<u>Explanation:</u>
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
.....(1)
Let the fractional abundance of isotope be 'x'. So, fractional abundance of isotope will be '1 - x'
- <u>For isotope:</u>
Mass of isotope = 62.9396 amu
Fractional abundance of isotope = x
- <u>For isotope:</u>
Mass of isotope = 64.9278 amu
Fractional abundance of isotope = 1 - x
- Average atomic mass of copper = 63.546 amu
Putting values in equation 1, we get:
![63.546=[(62.9396\times x)+(64.9278\times (1-x))]\\\\x=0.6950](https://tex.z-dn.net/?f=63.546%3D%5B%2862.9396%5Ctimes%20x%29%2B%2864.9278%5Ctimes%20%281-x%29%29%5D%5C%5C%5C%5Cx%3D0.6950)
Percentage abundance of isotope = 
Percentage abundance of isotope = 
Hence, the percentage abundance of and isotopes are 69.50% and 30.50% respectively.
Answer:
"This conversions relies on the fact that a mole of gas at STP has a volume of 22.4 L. It is important to note, however, that if the conditions of the gas are different this conversion will NOT work. Under those conditions you must use the ideal gas law to convert between moles and liters."
Answer:
The number of moles = 0.06 moles
Explanation:
i) Formula
Number of moles = Mass of the sample ÷ Molar masses of the substances
ii) Number of moles = 10.0 ÷ (137)+(19×2)
= 10.0 ÷ 175
= 0.06 moles
