B. Compound
Calcium nitrate is an inorganic compound
<u>Answer:</u> The correct answer is Option 4: U
<u>Explanation:</u>
Activation energy is defined as the energy that is given to a chemical system with potential reactants to produce products. It is represented as 
It is represented as the energy from the reactants to the activated complex.
Reverse reaction is defined as the reaction in which the products formed become reactants and leads to the formation of reactants back.
So, here, the activation energy of the reverse reaction is the energy between the products and the activated complex, which is represented as letter U in the given graph.
Hence, the correct answer is Option 4: U
<span>Density is a value for
mass, such as kg, divided by a value for volume, such as m^3. Density is a
physical property of a substance that represents the mass of that substance per
unit volume. We calculate as follows:
Density = (130.278 - 20.550) / (142.419 - 130.278)/0.7918 = 7.16 g/mL</span>
Answer:
false
Explanation
The chemical bonds were broken when creating the compound MgO.
P1*V1/T1=P2*V2/T2 just plug in the givens and find the unknown