Calculate the amount of heat needed to change 12 lbs of water at ation 150-f to 12lbs of steam at 212-f heat-m cp t . co" 1.0 btu/lb. f heat of vaporization for water-970 btu/lb. answer should be in btus

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided