The correct answer is A.) dilute
It’s option c. When resources are limited competition will increase => one will survive while other dies=> population will decline.
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BLACKSHARK
Answer:
0.129g MgCl2
Explanation:
For this we need to understand the concept of molarity.
Molarity is number of moles of solute/litres of solution
M=n/L
Here we are given molarity of 0.054M and volume of 25ml. we just plug this in formula to find moles of MgCl2
0.054=x/(25/1000) (we divided 25 by 1000 to convert it to litres of solution)
x=0.00135 moles of MgCl2 (we are not done yet the question asks for grams so to convert to grams we multiply by molar mass of MgCl2.)
0.00135molesMgCl2 x 95.211g MgCl2/1molMgCl2
= 0.129g MgCl2
First write up a balanced equation
<span>CaCO3 + 2 HCl = CO2 + CaCl2 + H2O
</span>
Find how many moles of CaCO3 you are dealing with
6.03 g x 1 mol / 100 g = .0603 moles
However, you need twice as much HCl
.0603 x 2 moles / .564 M = .21 L
75 g of water at 20 degrees C would hold dissolved (203.9 g) x (75/100) =
<span>152.9 g of sugar. </span>
<span>(300.0 g initially) - (152.9 g remaining in solution) = 147.1 g sugar crystallize out </span>
<span>So answer A.</span>