The transfer of energy from place to place or particle by direct contact is what

Tracy is studying for her chemistry exam and she reads that a nitric acid molecule is made of one hydrogen atom, one nitrogen atom and 3 oxygen atoms. The chemical formula for nitric acid is a. HNO3 Oьно OCHN O d. HO3 Oe. HN30

What neutral atom has a atomic number of 15 and atomic mass of 31. 3 electrons are gained whats the result?

Label each reactant as either a Bronsted-Lowry acid or a Bronsted-Lowry base. a. HF (aq) + H2O (l) - -> H3O + (aq) + F - (aq) HF (aq) ["Bronsted-Lowry acid", "Bronsted-Lowry base"] H2O (l) ["Bronsted-Lowry acid", "Bronsted-Lowry base"] b.

If you have 6.02 x 10 ^23 molecules of water in a glass, how many moles do you have? •1 •2 •3 •4

The air exhaled from the lungs of a smoker has a concentration of 24 ppm CO. Express the concentration as a percent.

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.