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Vlad [161]
3 years ago
8

What is the Sun's life span?

Chemistry
1 answer:
galben [10]3 years ago
3 0

5 billion years or more

You might be interested in
How would you separate copper sulfate crystals from its solution?​
tia_tia [17]

Answer: You would separate it by dissolving them.

4 0
3 years ago
Hydrogen is manufactured on an industrial scale by this sequence of reactions: CH2 (g) + H2O(g)=CO (g) + 3H2 (g) K1 CO (g) + H2O
Flauer [41]

Answer:

K = K1×K2 = [CO2] [H2]⁴ / [H₂O]² [CH4]

Explanation:

Based on the reactions:

CH2 (g) + H2O(g) ⇄ CO (g) + 3H2 (g) K1

CO (g) + H2O (g) ⇄ CO2 (g)+H2(g) K2

The sum of both reactions is:

CH4 (g)+2H2O (g) ⇄ CO2(g)+4H2(g) And K of the reaction is: K = K1×K2

K is defined as the ratio between concentrations of products and reactans. Each compound must be elevated to its coefficient in the reaction. That is:

<h3>K = K1×K2 = [CO2] [H2]⁴ / [H₂O]² [CH4]</h3>
4 0
4 years ago
A stock solution of HNO3 is prepared and found to contain 13.1 M of HNO3. If 25.0 mL of the stock solution is diluted to a final
musickatia [10]

Answer:

The diluted solution is 0.65 M

Explanation:

Dilution formula to solve the problem is:

M concentrated . V concentrated = M Diluted . V diluted

We can also make a rule of three though.

In 1000 mL of concentrated solution, we have 13.1 moles of  HNO₃

So in 25 mL we have (25 . 13.1 ) / 1000 = 0.327 moles of HNO₃

This moles are also in 0.500 L of diluted solution, the new molarity will be:

0.327 mol / 0.5L = 0.65 M

Molarity of diluted solution must be always lower than concentrated solution, otherwise the excersise is wrong.

If we replace in the formula

13.1 M . 25 mL = 500 mL . M diluted

M diluted = 13.1 m . 25 mL / 500 mL = 0.65 M

6 0
3 years ago
The total mass of the __________________ and __________________ in an atom is the atomic mass.
Eddi Din [679]

Answer:

protons, neutrons

Explanation:

There are three subatomic particles in all atoms: protons, neutrons and electrons. Of these three, only protons and neutrons are considered to have enough mass to contribute to overall atomic mass of the element.

5 0
3 years ago
Do y’all know what the answer is?
jekas [21]
The molecular formula iust is how many total number of atoms of each type are present in a molecule.

Have a close look at the structure, the large sized black atoms shown here are Carbons. Count the number of carbons, total of 5 carbons.
The smaller ones are hydrogens. Count the hydrogens they are 12.

The symbol for Carbon is C and Hydrogen is H. The molecular formula is thus C5H12.


The iupac name is Pentane
7 0
4 years ago
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