Answer:
group 8 of the periodic table
Explanation:
Answer:
<h2>
<em><u>It is a rocky terrestrial planet. 71% of earth is made up of water so the world is mostly covered by oceans. </u></em></h2><h2>
<em><u /></em></h2>
<em><u>Thank you for asking this great question need any other help please let me know by commenting below I'd be glad to help.</u></em>
<em><u /></em>
<em><u /></em>
<em><u> I'd also greatly appreciate you if you mark me as brainliest and click that thanks button.( optional )</u></em>
<em><u /></em>
<em><u /></em>
<em><u>Your brainly friend ( lauralit1 )</u></em>
<em><u /></em>
Answer:
The amount of salt in the tank at the end of an additional 10 minutes are 4.38lb.
Explanation:
<u>Situation 1:</u>
Tank with 100 gallons of fresh water
<u>Situation 2:</u>
Tank with 100 gallons of fresh water + water with 0.5lb of salt per gallon
After 10 minutes, as the rate in which the new water is poured is 2 gallons per minute, the result is 20 gallons added (2×10=20) . And taking in account that the water contains 0.5 lb of salt per gallon the amount of salt added is 20×0.5= 10lb of salt.
That amount of salt is now in all the water inside the tank which is 100 gallons+ 20 gallons= 120 gallons. <em>That means that in situation 2 we have 10lb of salt in 120 gallons of water.</em>
That mixture is allowed to leave the tank at a rate of 2 gallons per minute so we will have after 10 minutes: 120 gallons- (2×10) gallons= 100 gallons remaining in the tank. And the amount of salt if we remember that we had 10lb in 120 gallons, now in 100 gallons we will have: (100 gallons × 10lb of salt)/ 120 gallons= 8.33 lb of salt.
<u>Situation 3:</u>
Tank with 100 gallons of water with 8.33lb of salt.
After 10 minutes in which fresh water is poured in the tank at a rate of 9 gallons per minute, the result is: 9×10= 90 gallons added to the tank. So now we have 100+90=190 gallons of water in the tank. <em>That means in situation 3 we have 8.33 lb of salt in 190 gallons of water. </em>
That mixture is leaving the tank at a rate of 9 gallons per minute so we have after 10 minutes: (190- (9×10))= 100 gallons of mixture remaining in the tank.
And the amount of salt if we remember that we had 8.33lb in 190 gallons, now in 100 gallons we will have: (100 gallons × 8.33lb of salt)/ 190 gallons= 4.38 lb of salt.
<u>Answer:</u> The average atomic mass of element titanium is 46.889 amu.
<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)
- <u>For isotope 1 (Ti-46) :</u>
Mass of isotope 1 = 45.95263 amu
Percentage abundance of isotope 1 = 70.600 %
Fractional abundance of isotope 1 = 0.70600
- <u>For isotope 2 (Ti-48) :</u>
Mass of isotope 2 = 47.94795 amu
Percentage abundance of isotope 2 = 11.900 %
Fractional abundance of isotope 2 = 0.11900
- <u>For isotope 3 (Ti-50) :</u>
Mass of isotope 3 = 49.94479 amu
Percentage abundance of isotope 3 = 17.500 %
Fractional abundance of isotope 3 = 0.17500
Putting values in equation 1, we get:
Hence, the average atomic mass of element titanium is 46.889 amu.