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yulyashka [42]
3 years ago
9

1.

Chemistry
1 answer:
Dahasolnce [82]3 years ago
8 0

Answer:

22.5moles

Explanation:

using mole ratio,n(CO2)/n(o)=1/2

n(CO2)=1/2n(02)

n(CO2)=1/2×45

moles of carbon dioxide produced is 22.5moles

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In plants, what does chlorophyll absorb so photosynthesis can take place?
Misha Larkins [42]

Answer:

OC energy

Explanation:

5 0
3 years ago
What is the mass number of the atom shown?
german

Answer:

21

Explanation:

Formula;

Mass number = number of protons + number of neutrons

= 9 + 12

= 21

7 0
4 years ago
Calculate the volume in liters of a M magnesium fluoride solution that contains of magnesium fluoride . Round your answer to sig
AveGali [126]

The given question is incomplete. the complete question is:

Calculate the volume in liters of a 0.91 M magnesium fluoride solution that contains 249.2 g of magnesium fluoride . Round your answer to 2 significant digits.

Answer: 4.4 Liters

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n}{V_s}

where,

n = moles of solute

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{249.2g}{62.3g/mol}=4.00moles

V_s =volume of solution in L

0.91=\frac{4.00}{V_s}

Thus the volume in liters is 4.4 L

8 0
3 years ago
The daily value for phosphorus is a 700 mg how many grams of phosphorus are recommended​
-BARSIC- [3]

The amount of grams of phosphorus that are recommended is 0.700 g

Why?

This is an unit conversion problem. To convert between units we use conversion factors. In this case the conversion factor we want is from mg to g, and this is relatively simple: 1000 mg = 1 g. Now, we arrange the quantities in the following way:

700 mg P*\frac{1g}{1000mg}=0.700 g

Conversion factors are really useful for converting units! Just remember to put the unit you don't want at the bottom, and the one you want at the top.

Have a nice day!

#LearnwithBrainly

5 0
3 years ago
6. Which atomic particle has a positive (+) charge?
m_a_m_a [10]

Answer:

lithum

Explanation:

5 0
3 years ago
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