Answer:
248 miles
Explanation:
At an average altitude of 248 miles (400 kilometers) above Earth, the space station is the third brightest object in the sky.
Answer: 11.0 g of calcium will react with 10.0 grams of water.
Explanation:
To calculate the moles, we use the equation:
moles of
The balanced chemical equation is:
According to stoichiometry :
2 moles of
require = 1 mole of
Thus 0.55 moles of
require=
of
Mass of
Thus 11.0 g of calcium will react with 10.0 grams of water.
C. they are equal
This is because it takes about the same amount of time for the moon to rotate around its axis that it does to rotate around the Earth.
Answer:
a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.