the answer is b
The posterior pituitary secretes two important endocrine hormones—oxytocin and antidiuretic hormone
Answer: Out of 118 elements, 94 occur naturally
Well it depends how close the places are to the edges of tectonic plates. Also the damage caused from the Earthquakes has to do with how sturdy the buildings are and whether they were built to withhold such strong forces.
Answer:
(A) Battery in a flashlight
Explanation:
Because the chemicals in the battery are being converted to light and heat energy from the bulb!
<u>Answer:</u> The mass of water required is 18.52 g
<u>Explanation:</u>
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
......(1)
Given mass of magnesium hydroxide = 30.0 g
Molar mass of magnesium hydroxide = 58.32 g/mol
Plugging values in equation 1:

The given chemical equation follows:

By the stoichiometry of the reaction:
If 1 mole of magnesium hydroxide produces 2 moles of water
So, 0.5144 moles of magnesium hydroxide will react with =
of water
Molar mass of water = 18 g/mol
Plugging values in equation 1:

Hence, the mass of water required is 18.52 g