What is the percent of phosphorus by mass in phosphoric acid h3po4

1. baking powder is a 1: 1 molar mixture of cream of tartar (khc4h4o6) and baking soda (nahco3). a recipe calls for two teaspoons (a total of 8.0 grams) of cream of tartar. how much baking soda must be added for both materials to react completely?

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?