Answer:
d. Pressure
Explanation:
Pressure is not a factor which affect rates of reaction.
However, surface area, temperature, and concentration are factors that affect rates of reaction.
Answer:
0.97 × 10⁹ strontium atoms
Explanation:
if 1 pm is equal with 10⁻⁹ mm
then 215 pm are equal to X mm
X = (215 × 10⁻⁹) / 1 = 215 × 10⁻⁹ mm
Now the diameter of the strontium atom is twice the radius:
diameter = 215 × 10⁻⁹ × 2 = 430 × 10⁻⁹ mm
if 1 strontium atom have a diameter of 430 × 10⁻⁹ mm
then X strontium atom are needed to be laid said by side to span a distance of 419 mm
X = (419 × 1) / (430 × 10⁻⁹) mm = 0.97 × 10⁹ strontium atoms
The enthalpy of the reaction according to given information is –1,267.2 kJ
<h3>What is Enthalpy of the reaction ?</h3>
The Heat of Reaction (also known and Enthalpy of Reaction) is the change in the enthalpy of a chemical reaction that occurs at a constant pressure.
It is a thermodynamic unit of measurement useful for calculating the amount of energy per mole either released or produced in a reaction.
Therefore, The enthalpy of the reaction according to given information is –1,267.2 kJ
Learn more about Enthalpy here ;
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Carbon atoms are saturated with (surrounded by) Hydrogen atoms
