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tensa zangetsu [6.8K]
3 years ago
8

Question 6 of 10

Chemistry
1 answer:
KengaRu [80]3 years ago
8 0

Answer:

option C

Explanation:

hope it helps u

.......

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What happens to energy when methane increases?
Zanzabum

Answer:

How does methane gas affect the environment?

If methane leaks into the air before being used — from a leaky pipe, for instance — it absorbs the sun's heat, warming the atmosphere. For this reason, it's considered a greenhouse gas, like carbon dioxide.

Explanation:

4 0
3 years ago
What is the broadest, most general level of taxonomy?
nikdorinn [45]

Answer:The levels of classification are as follows (Broadest to

narrowest): Domain, Kingdom, Phylum, Class, Order, Family, Genus,

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Explanation:

8 0
3 years ago
How many moles of HNO3 are present if 4.90×10−2 mol of Ba(OH)2 was needed to neutralize the acid solution?
Amiraneli [1.4K]

Answer:

0.098 moles

Explanation:

Let y represent the number of moles present

1 mole of Ba(OH)₂ contains 2 moles of OH- ions.

Hence, 0.049 moles of Ba(OH)2 contains y moles of OH- ions.

To get the y moles, we then do cross multiplication

1 mole *  y mole = 2 moles * 0.049 mole

y mole = 2 * 0.049 / 1

y mole =  0.098 moles of OH- ions.

1 mole of OH- can neutralize 1 mole of H+

Therefore, 0.098 moles of HNO₃ are present.

3 0
3 years ago
Arrange the following elements in order of increasing first ionization energy.
Naddika [18.5K]

Answer:

The answer to your question is  Al, Mg, Si, S, P

Explanation:

First ionization energy is the energy necessary to remove an electron from an atom in a gaseous form.

Element           First ionization energy (kJ/mol)

Magnesium              737.7  

Aluminum                 577.5

Silicium                    786.5

Phosphorus              1011.8

Sulfur                        999.6

Order:   Al, Mg, Si, S, P

4 0
3 years ago
To prepare 250.0 mL of 2.5 M KCl you will need to dilute _____ mL of 8.0 M KCl solution to a volume of 250.0 mL.
Radda [10]

Answer:

78.125ml

Explanation:

Number of moles in 250ml of 2.5M KCl is (250÷1000)litres×2.5M so we divide these moles by 8M. The answer gotten will be in litres so multiply by 1000 to get it in ml

6 0
3 years ago
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