Chemistry Answers

Stomach acid is approximately 0.137 M HCl. Using your average number of moles of CaCO3 per antacid tablet, what volume of stomach acid will a tablet neutralize?

Container A holds 727 mL

727 mL of an ideal gas at 2.50 atm.

2.50 atm. Container B holds 159 mL

159 mL of a different ideal gas at 4.90 atm.

4.90 atm.

If the gases are allowed to mix together, what is the resulting pressure?\

Determine the pressure in atm exerted by 1 mole of methane in a 2.44mL bulb at 25°c using vanderwaals equations

Which atomic orbital is spherical in shape?

0.125L of 0.05M Ba(OH)2

how to calculate molar concentration

What mass of oxygen gas is needed to burn 44.6 g of propane (C 3 H 8 (g) in a complete combustion reaction ?

A 0.2719g sample containing (blank)3 reacted with 20.00mL of 0.2254 M HCl. Given that HCl was excess. The excess HCl required exactly 20.00mL of 0.1041 M NaOH to reach the end-point using phenolphthalein indicator. Determine percentage purity of (blank)3 in the sample.

The reaction involved is

3( )+2 ( )→ 2( )+2 2O(l)

The titration reaction is

( )+NaOH(aq) Cl( )+ 2 (l)

Devise a procedure for selectively precipitating the following ions from each other in a common solution. Record your table, the order the solutions must be added and the precipitate that forms at each step. (4 each)

a. Cl- and PO4 3-

b. Ca2+ and Ag+

c. Cu2+ and Ca2+

Calculate the molarity of a solution prepared by dissolving 250.0 g of Ca(NO₃)₂ in enough water to make 3.50 L of solution.

 a

5.34 M

 b

0.45 M

 c

1.52 M

 d

71.4 M