Answer:contact forces or transfer energy(not sure)
Explanation:
199.5 g of sucrose is needed to make 665 ml of 30 % weight by volume percent solution.
<h3>What is percent solution?</h3>
Percent solution is defined as a convenient way to record concentration of solution.It is a expression which relates solute to solvent as,mass of solute/mass of solution ×100.There are two types of percentage solutions percent weight by volume and percent volume by volume .Advantages of using percent solutions is that molecular weight of compound is not required.
This example is percent weight by volume where mass of solute is calculated as,%(w/v)= mass of solute/mass of solution×100
substitution of values gives,30×665/100=199.5 g
Thus ,199.5 g of sucrose is required to make 665 ml of 30 % sucrose solution.
Learn more about percent solutions,here:
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Answer:
B) 2.87 L
Explanation:
A mole of any gas at STP has a volume of about 22.412 liters. So, 0.128 moles of gas will have a volume of ...
0.128 · 22.412 L ≈ 2.87 L
Answer:
B mixture can be separated by physical means
Answer:
Let, X be the oxidation state of Cr in K
2
Cr
2
O
7
.
2(+1)+2X+7(−2)=0
2+2X−14=0
2X=12
X=+6
Hence, the oxidation state of Cr in K
2
Cr
2
O
7
is +6.