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3 years ago

What is the mass of 3.50 moles of silicon dioxide (SiO2)?

Chemistry

1 answer:

nydimaria [60]3 years ago

7 0

Answer:

A , 210.3 g

Explanation:

Given data:

Number of moles of SiO₂ = 3.50 mol

Mass of SiO₂ = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of SiO₂ = 60.08 g/mol

by putting values,

3.50 mol = mass/60.08 g/mol

Mass = 3.50 mol × 60.08 g/mol

Mass = 210.3 g

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Chrysanthenone is an unsaturated ketone. If Chrysanthenone has M+ = 150 and contains 2 double bond(s) and 2 ring(s); what is its

snow_lady [41]

Answer:

the Molecular formula will be; C10H14O

Explanation:

Given the data in the question;

Chrysanthenone is an unsaturated ketone,

it has M+ = 150 and contains 2 double bond(s) and 2 ring(s).

molecular formula = ?

we know that ketone contain 1 oxygen and mass of oxygen is 16

so mass of the C and H remaining will be;

⇒ 150 - 16 = 134

Now we determine the number of C atoms;

⇒ 134 / 13 = 10

hydrocarbon with 10 hydrogen atom have CnH2n+2 means

⇒ ( 10 × 2 ) +2 = 22 hydrogens

But then we have 3 unsaturation meaning 6 hydrogens less and also we have ring meaning 2 more hydrogens

⇒ 22 - 6 - 2 = 14

Hence the Molecular formula will be; C10H14O

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3 years ago

Help pls <br> is this direct, constant, indirect, or cycling?

IRISSAK [1]

Answer:

Indirect. I don't think it's cycling and it's not direct or constant

5 0

3 years ago

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5.Apply six atoms of Element A combined with eight atoms of Element B

Julli [10]

Answer:24

Explanation:axtizent

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3 years ago

Analysis of the water content of a lake found in the desert showed that it contained 16.6 percent chloride ion, and had a densit

IRISSAK [1]

Answer : The molarity of the chloride ion in the water is, 5.75 M

Explanation :

As we are given that 16.6 % chloride ion that means 16.6 grams of chloride ion present 100 grams of solution.

First we have to calculate the volume of solution.

$\text{Volume of solution}=\frac{\text{Mass of solution}}{\text{Density of solution}}$

$\text{Volume of solution}=\frac{100g}{1.23g/mL}=81.3mL$

Now we have to calculate the molarity of chloride ion.

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

$\text{Molarity}=\frac{\text{Mass of chloride ion}\times 1000}{\text{Molar mass of chloride ion}\times \text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$\text{Molarity}=\frac{16.6g\times 1000}{35.5g/mole\times 81.3mL}=5.75mole/L=5.75M$

Thus, the molarity of the chloride ion in the water is, 5.75 M

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3 years ago

Is acetone a compound, an element or heterogeneous or homogeneous

makvit [3.9K]

Answer:

Acetone is a compound.

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4 years ago

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