3 years ago

Hii I need a tutor for chemistry

1 answer:

kap26 [50]3 years ago

3 0

Answer:

I had a tutor for chemistry but I think I don't have the number now.

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VMariaS [17]

Answer: hcl

Explanation:

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3 years ago

Rashid [163]

Answer:

I think it is Magma

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3 years ago

Sergeu [11.5K]

Somewhat of the same element, have same amount of protons but different number of neutrons. <span />

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3 years ago

Stels [109]

Answer: The percent yield of the reaction is 77.0 %

Explanation:

$2Pb+O_2\rightarrow 2PbO$

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

$\text{Number of moles of lead}=\frac{451.4g}{207.2g/mol}=2.18moles$

$\text{Number of moles of lead oxide}=\frac{374.7g}{223.2g/mol}=1.68moles$

According to stoichiometry:

2 moles of $Pb$ produces = 2 moles of $PbO_2$

2.18 moles of $Pb$ is produced by= $\frac{2}{2}\times 2.18=2.18moles$ of $PbO_2$

Mass of $PbO_2$ = $moles\times {\text {Molar mass}}=2.18\times 223.2g/mol=486.6$

percent yield = $\frac{374.7g}{486.6g}\times 100=77.0\%$

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3 years ago

MaRussiya [10]

Answer: Volume of benzene is: 22.8 cm cubed

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3 years ago

Hii I need a tutor for chemistry￼