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BartSMP [9]
3 years ago
7

What is chemical energy?

Chemistry
1 answer:
-Dominant- [34]3 years ago
8 0
Answer:
I think it’s D
Explanation:
Chemical strength, Chemical compounds have energy contained in their bonds. Chemical energy may be emitted in the form of heat during a chemical reaction, which is known as an exothermic reaction. The body transforms the chemical energy in food into mechanical energy and heat.
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Which of these statements is true?
barxatty [35]

Answer:

(d) All spontaneous reactions have a negative free-energy change

Explanation:

All spontaneous reactions releases free energy which can be used later for the work to be done. A reaction with a negative value for ΔG releases free energy and is thus spontaneous

5 0
3 years ago
How many moles in 16.012 g
olga_2 [115]
If you want you can repost this question with a picture but I need to see it in order to help you , or you can read the picture I added for you

5 0
3 years ago
Compare the root mean square speeds of O2 and UF6 at 65 degree Celsius
gayaneshka [121]
<h3>Answer:</h3>

The root mean square speeds of O₂ and UF₆ is 513m/s and 155 m/s respectively.

<h3>Solution and Explanation:</h3>
  • To find how fast molecules or particles of gases move at a particular temperature, the root  mean square speed is calculated.
  • Root mean square speed of a gas is calculated by using the formula;

       Root mean square=\sqrt{ \frac{3RT}{M}

       Where R is the molar gas constant, T is the temperature and M is the molar mass of gas in Kg.

<h3>Step 1: Root mean square speed from O₂</h3>

Molar mass of Oxygen is 32.0 g/mol or 0.032 kg/mol

Temperature = 65 degrees Celsius or 338 K

Molar gas constant = 8.3145 J/k.mol

Root mean square speed = \sqrt\frac{(3)(8.3145)(338K)}{0.032}

                                        = 513.289 m/s

<h3>Step 2: Root mean square speed of UF₆   </h3>

The molar mass of UF₆ is 352 g/mol or 0.352 kg/mol        

Root mean square speed = \sqrt\frac{(3)(8.3145)(338K)}{0.352}

                                                 = 154.762m/s

Therefore; the root mean square speeds of O₂ and UF₆ is 513m/s and 155 m/s respectively.

7 0
3 years ago
The ratio of the heights 1.50 m and 75 cm of two persons can be written as ​
Blizzard [7]

Answer:

The required ratio would be 2:1

8 0
3 years ago
What is the concentration of a HF solution with a PH of 2.3
alisha [4.7K]
Answer:
             [H⁺]  =  5.011 × 10⁻³ mol.L⁻¹

Explanation:

The pH is converted into concentration of H⁺ as,

[H⁺]  = 10^-pH

Where 10 is antilog,

So, putting values,

[H⁺]  =  10⁻²·³

[H⁺]  =  0.00501

Or,

[H⁺]  =  5.011 × 10⁻³ mol.L⁻¹
4 0
4 years ago
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