No, it is a physical change. Changing states is physical.A chemical change is to change the nature of something by changing it's chemical makeup.
Density = 0.7899 g/mL
mass = 28.7 g
Volume = ?
therefore:
D = m / V
0.7899 = 28.7 / V
V = 28.7 / 0.7899
V = 36.333 mL
Answer:
do you mean?
Explanation:
the structural formula of butyl pentyl ether
Answer: 345,000 calories
Explanation:
Calories in food such as candy bars refer to the amount of energy that the food has. Calories are also called Kilocalories because they are the equivalent of 1,000 calories.
If the candy bar contained 345 calories therefore, and 1 Calorie is 1,000 calories, the calories in the candy bar are:
= 345 * 1,000
= 345,000 calories
Answer: d) 164.9 g
Explanation:
To calculate the moles :
The balanced chemical reaction is:
According to stoichiometry :
2 moles of 
require = 25 moles of 
Thus 0.412 moles of will require=
of
Mass of 
Thus 164.9 g of oxygen is consumed.
