Chemistry, 28.07.2019 02:00 Karinaccccc
Some baking soda and vinegar were weighed separately and the weights added together. the two substances are mixed and a chemical reaction occurred, producing carbon dioxide, sodium acetate, and water. when the three new substances are weighed and the weights totaled, which of the following will be true? a. there is no way to know, because changes in mass are random. b. the new weights will be more because there is more mass. c. the original weight will be more because there was more mass. d. the two weights will be equal, because the mass is the same.
Answers: 1
Chemistry, 22.06.2019 06:30
The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams
Answers: 2
Chemistry, 22.06.2019 18:50
Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g. what is the percent by mass of water in the hydrate? %
Answers: 1
Chemistry, 22.06.2019 23:00
What element has similar physical and chemical properties as boron.
Answers: 1
Some baking soda and vinegar were weighed separately and the weights added together. the two substan...
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