Chemistry, 20.04.2021 23:40 21shuldrak
The following question has two parts. First, answer Part A. Then, answer Part B.
Part A:
Jon thinks about ways he could increase the rate of the chemical reaction between calcium chloride (CaCl2) and sodium bicarbonate (NaHCO3).
Which change would MOST LIKELY increase the rate of the chemical reaction?
A
use a sodium bicarbonate-water solution that has a temperature of 30°C instead of 25°C
B
use 5 grams of calcium chloride powder instead of 10 grams
C
use slow stirring instead of rapid stirring
D
use a 1000 mL beaker instead of a 500-mL beaker
Part B:
Which statement BEST explains why this change would increase the rate of the chemical reaction?
A
Molecular collisions would occur more often and with more energy.
B
Reactant and product molecules would be closer together.
C
Product molecules would have more energy and become a gas.
D
Fewer molecular collisions would be needed to form the same amount of product.
Answers: 1
Chemistry, 22.06.2019 06:30
The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide
Answers: 3
Chemistry, 22.06.2019 21:30
An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.
Answers: 1
The following question has two parts. First, answer Part A. Then, answer Part B.
Part A:
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