How many atoms are in 165 g of calcium?

Rank the bonds from highest polarity to lowest polarity. (Highest on top) Si--H N--H O--H Br--H C--H

If the atomic number of an element remains the same but the number of neutrons has been increased, which factor has been changed in that element? the number of electrons the chemical symbol the number of protons the mass number

How might a polar bear's fur and internal temperature relate to homeostasis?

a) How much heat is needed to convert one kg of feed water at 20oC into dry saturated steam at a pressure of 9 bar? Take specific heat of water as 4.187 kJ/kg K.

What is the oxidation state of each element in SO4 (2-) ?

Internal respiration is the transfer of oxygen and carbon dioxide from the lungs to the tissue cells of the body. True or False

Which element is a metalloid? 1. Al 2. Ar 3. As 4. Aa

You move a 25N object 4 meters. Find the work you did

What is the relationship between matter and elements

Which of these would be an appropriate way to describe the concentration of orange candies? Check all that apply the number of orange candies divided by total number of candies the mass of orange candies divided by total mass of candies the volume