Which property of matter does the instrument measure?

mass

weight

density

temperature

Which of the following will determine the number of moles in a sample Dividing the mass of the sample by Avogadro's number Multiplying the mass of the sample by Avogadro's number Dividing the number of molecules in the sample by Avogadro's number

Balance the equation? c4h10 (g) + ? o2 (g) →? co2 (g) + ? h2o (g), using the smallest possible integers. what is the coefficient of c4h10?

The kinetic energy of an object is equal to one half its mass multiplied by its speed

How many protons and neutrons are there in an atom of boron11?

What is the atomic number of the two isotopes of nitrogen? -5 -6 -7 -8 -9

What volume of 20 mg/L dye would be required to make 50. mL of. 10 mg/L dye?

A weather balloon at Earth's surface has a volume of 3.9 L at 299 K and 763 mmHg. If the balloon is released and the volume reaches 4.13 L at 720 mmHg, what is the temperature? Answer in units of K.

Molecules that resemble fats but contain phosphate functional groups are called: a. steroids. b. polypeptides. c. phospholipids. d. nucleic acid.

Draw the correct structural formula for the following compounds: (be sure to include the hydrogen atoms where required) a) 2-pentene b) 2,3-diethyl-3,5-dimethylhexane c) 4-ethyl-2,6-dimethyl-2-heptene

4. Electronegativity is a measure ofA) the energy needed to remove an electron from an atom. B) the energy released when an electron is added to an atom. C) the magnitude of the negative charge on an electron.