Although electrons have mass, they are not considered in determining the mass number of an atom. Why?

How many moles of an ideal gas are in a tank with a volume of 22.9 L at pressure of 14.297 atm at 12°C? (Show work and units)

There is a pattern to the phases of the moon. The time between one full moon to another is about a; new b; waxing crescent c; 1st quarter d; full

Satellites orbit Earth in the.

Consider the chemical formula for one unit of aluminum sulfate, Al2 (SO4) 3. How many total atoms would be present in 22 units of aluminum sulfate?

Select the correct answer. What does the law of conservation of energy state? O A. Energy can be created from nothing. OB. Energy cannot be destroyed. C. Energy cannot change forms. D. The total amount of energy in a system changes continuously.

Which type of bond forms between water molecules? a. strong bond b. hydrogen bond c. covalent bond d. polar bond

Down syndrome is caused by the presence of an extra copy of chromosome 21. how would a karyotype identify a person with down syndrome? a) ID physical characteristics of someone with the disease.

Which expression is a measurement of denisty

Compare the information provided by a molecules chemical formula to the information provided by its structural formula

How is a circle different from an ellipse