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galben [10]
3 years ago
6

What is the density of the football?

Chemistry
2 answers:
VLD [36.1K]3 years ago
7 0

Answer:

4.3kg

Explanation:D=M/V

KIM [24]3 years ago
4 0

Answer:

0.10

Explanation:

Answer in edge 2020

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How many grams of cobalt (II) nitrate, Co(NO3)2, are required to make a 2.20%(w/v) aqueous solution in a 250 mL volumetric flask
shutvik [7]

Answer:

\large \boxed{\text{5.50 g}}

Explanation:

Percent means " per hundred," so % m/V means the grams of something in 100 mL of  volume.

\text{m/V \%} = \dfrac{\text{mass of solute} }{\text{volume of solution}} \times 100 \, \%

Data:

         m/V % = 2.20 %

V of solution = 250 mL

Calculations:

\text{2.20 \%} = \dfrac{\text{mass of solute} }{\text{250 mL}} \times 100 \, \%\\\\\text{Mass of solute} = \dfrac{2.20\, \% \times \text{250 mL}}{100 \%} = \text{5.50 g}\\\\\text{The mass of Co(NO$_{3}$)$_{2}$ is $\large \boxed{\textbf{5.50 g}}$}

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3 years ago
4.
svlad2 [7]

Answer:

B) 125 mL

Explanation:

M1V1=M2V2

(0.120M)(x)=(150.0 mL)(0.100M)

x= 125 mL

*Text me at 561-400-5105 for private tutoring if interested: I can do homework, labs, and other assignments :)

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