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2 years ago

13. List the following ions in order of increasing radius: Li+, Mg2+, Br"

Chemistry

2 answers:

Sergeeva-Olga [200]2 years ago

5 0

Answer:

The answer would be B, PC13

Explanation:

jenyasd209 [6]2 years ago

5 0

Answer:

B: PC13

Explanation:

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3 years ago

Ascorbic acid, or vitamin C (C6H8O6, molar mass = 176 g/mol), is a naturally occurring organic compound with antioxidant propert

nydimaria [60]

Answer : 50.69 mg of ascorbic acid does not meet the daily requirement.

Solution : Given,

Molar mass of Ascorbic acid = 176 g/mole

Moles of Ascorbic acid = $2.88\times 10^{-4}moles$

Formula used :

$Moles=\frac{Mass}{\text{ Molar mass}}$

or, $\text{ Mass of ascorbic acid}=\text{ Moles of ascorbic acid}\times \text{ Molar mass of ascorbic acid}$

Now put all the given values in this formula, we get the mass of ascorbic acid.

$\text{ Mass of ascorbic acid}=(2.88\times 10^{-4}moles)\times (176g/mole)=0.050688g=50.69mg$

Conversion : $(1g=1000mg)$

As per question, a healthy adult’s daily requirement of vitamin C is 70-90 mg. But calculate mass of vitamin C is 50.69 mg. So, 50.69 mg of ascorbic acid does not meet the daily requirement.

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3 years ago

2zn+o2=2zno <br><br> how many moles of zinc are needed to make 6 moles of zinc oxide?

Temka [501]

Answer:

$\boxed{\text{6 mol}}$

Explanation:

(a) Balanced equation

2Zn + O₂ ⟶ 2ZnO

(b). Calculation

You want to convert moles of ZnO to moles of Zn

The molar ratio is 2 mol Zn:2 mol ZnO

$\text{Moles of Zn} =\text{6 mol ZnO} \times \dfrac{\text{2 mol Zn}}{\text{2 mol ZnO}} = \text{6 mol Zn}\\\\\text{You need }\boxed{\textbf{6 mol of Zn}}\text{ to form 6 mol of ZnO}.$

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3 years ago

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tresset_1 [31]

Answer:

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Explanation:

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3 years ago

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Tomtit [17]

the answer is probably cuz I looked it up online listed properties

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3 years ago