Calculate the [OH-] if the pOH = 2.55.

a

2.55 M

b

11.45 M

c

3.55 x 10-12 M

d

2.82 x 10-3 M

If you have 112 g of Ni and 112 g of AgNO3, how many atoms of silver would be produced?

identify the terms, like terms, coefficients and constants 2+3a+9a

The molar mass of the common antibiotic oxytetracycline is found to be 460 g mol-1 and a 2.000 g sample contains 1.1478 g of carbon, 0.10435 g of h, 0.62609 g of oxygen and the remainder being nitrogen.

Which sample of Hcl (aq) reacts at the fastest rate with a 1.0 gram-sample of iron filings 1) 10Ml or 1M Hcl (aq) at 10c 2) 10Ml of 1M Hcl (aq) at 25c 3) 10Ml or 3M Hcl (aq) At 10c 4) 10Ml of 3M Hcl (aq) at 25c

What is the term for the molecular mass of any substance expressed in grams? A. molar mass B. molar volume C. molar density D. mole

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?