Is a cup of coffee a solution or heterogeneous mixture?

An atom has 27 protons and 22 neutrons. what is the chemical symbol for the atom

14. The empirical formula of a certain hydrocarbon is CH2. When 0.125 moles of this hydrocarbon is completely combusted with excess oxygen, it is observed that 8.40 L of CO2 gas is produced at STP.

How are RNA and DNA used to make proteins? A-RNA has coded instructions for making proteins, and DNA translates the code. B-DNA forms the monomers that make up RNA, and RNA forms the monomers that make up proteins.

In the lewis structure of ch3oh, how many lone pairs of electrons are there? in the lewis structure of ch3oh, how many lone pairs of electrons are there? 3 2 5 7

Assume that you have 12 mL of a liquid. You cool the liquid to turn it into a solid that occupies only one-fourth the volume that the liquid did. what would be the volume of the gas

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume

Which of the following statements about igneous rocks is correct A. intrusive igneous rocks are formed when magma is called above the ground. B. Extrusive igneous rocks are formed when magma is cooled above the ground C.