2 years ago

What is the density of an object having a mass of 4.0 g and a volume of 30 mL?

1 answer:

3 0

Answer:

8.324 Hope this helps! =)

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azamat

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3 years ago

Sauron [17]

Answer:

Explanation:

because 5x5 = 25

and 25 ÷5= 5

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3 years ago

Sonbull [250]

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3 years ago

BlackZzzverrR [31]

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kolezko [41]

Answer:

number of hydrogen atom in 1.8 mole of NH2OH = $9.8\times 10^{22}$

Explanation:

percentage of hydrogen in NH2OH = mass of hydrogen / mass of whole molecule

= $\frac{3\times 1}{14+3+16}$ \times 100

= 9.09 percentage

therefore number of moles in 1.8 moles of hydroxy amine = $\frac{9.09}{100}\times 1.8$

= .16 moles of hydrogen

number of hydrogen atom = (number of moles )×(avagadro number)

= $9.8\times 10^{22}$ atoms of hydrogen

3 0

3 years ago