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3 years ago

8. H2 + O2-> __H2O

Chemistry

1 answer:

Rus_ich [418]3 years ago

8 0

Anser:

Explanation:

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A scientist produces zinc iodide (zni2). (a) calculate the minimum mass of zinc that needs to be added to 0.500 g of iodine so t

harina [27]

The minimum mass of Zinc, Zn that needs to be added to 0.500 g of iodine so that the iodine fully reacts is 0.128 g

<h3>Balanced equation </h3>

Zn + I₂ —> ZnI₂

Molar mass of Zn = 65 g/mol

Mass of Zn from the balanced equation = 1 × 65 = 65 g

Molar mass of I₂ = 127 × 2 = 254 g/mol

Mass of I₂ from the balanced equation = 1 254 = 254 g

SUMMARY

From the balanced equation above,

254 g of I₂ required 65 g of Zn

<h3>How to determine the mass of Zn needed </h3>

From the balanced equation above,

254 g of I₂ required 65 g of Zn

Therefore,

0.5 g of I₂ will require = (0.5 × 65) / 254 = 0.128 g of Zn

Thus, the minimum mass of Zn required is 0.128 g

Learn more about stoichiometry:

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3 years ago

Calculate the mass of 0.0455 mol of Ni

Lera25 [3.4K]

Answer:

2.67g Ni

Explanation:

To convert from moles to mass, use molar mass as a conversion factor.

Nickel has a molar mass of 58.69g/mol.

0.0455mol ( $\frac{58.69g Ni}{1 mole Ni}$ ) = 2.67g Ni

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A 225. mL sample 3.5M solution of KBr is diluted to a final volume of 750. mL. What is the final concentration of this solution?

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C= comcentration
V= volume
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x=(3.5*225/750) =1.05M≈1.1M

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8. __H2 + __O2-> __H2O

8. H2 + O2-> __H2O