Chemistry

Chemistry, 22.07.2019 00:00, Nataliepavon7

If you have 5 grams of product after a chemical reaction, how many grams of reactants did you have at the start of the reaction? question 21 options: 3 4 2 5

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Chemistry, 13.09.2019 01:30, lachereyon11

Adding a catalyst to a reaction would increase which quantity? a. grams of product produced in an hour b. grams of product at the end of the reaction c. concentration of product at the end of the reaction d. concentration of reactants at the end of the reaction

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Chemistry, 17.09.2019 19:00, chrisroman152

In the chemical reaction below, 300 grams of reactant a reacted completely with 100 grams of reactant b, to form the product ab. how many grams of the product, ab, would be formed in this complete reaction? slightly less than 400 grams, because some atoms always disappear into thin air when a chemical reaction occurs. 400 grams of ab 200 grams of ab

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Mathematics, 06.10.2019 04:30, dantew8238

The equation shows a chemical reaction using 64 grams of calcium, 162 grams of zinc carbonate, and 152 grams of calcium carbonate. calcium + zinc carbonate → calcium carbonate + zinc according to the law of conservation of matter, how much zinc is present in the product? group of answer choices 98 grams 64 grams 74 grams 88 grams flag this question question 64.5 pts tim dissolves 0.5 grams (g) of sugar in a beaker containing 50.0 g of water, as shown below. what is the mass of the solution? group of answer choices 45.5 g 50.0 g 50.5 g 25.0 g flag this question question 74.5 pts in her chemistry class, carmen performed an experiment that involved a chemical reaction. she measured the total mass of the reactants she used in her experiment using a triple-beam balance. the measurement she obtained is illustrated below. image according to the law of conservation of mass, what was the mass of the products in her experiment? group of answer choices 342 g 240 g 243 g 300 g

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Chemistry, 10.10.2019 21:40, dondre54

Solids are often defined as having a definite shape, while gases and liquids have no definite shape. this can best be explained by the fact that a) solids have a more ordered arrangement of atoms than liquids and gases. b) in solids molecules move faster than in liquids or gases. c) solids have less internal energy than liquids and gases. d) solids have the least orderly internal structure. 15) color, shape, texture, and size are properties of matter. a) chemical b) liquid c) physical d) solid 16) which is evidence that a chemical reaction has occurred? a) a phase change occurs b) a new gas is observed in the form of bubbles c) red and yellow paint mixing to make orange paint d) the temperature of the substance remains constant 17) reactant → product if there are 4 grams of reactant, how many grams of product are produced by the chemical reaction? a) 0 grams b) 2 grams c) 4 grams d) 8 grams 18) which of these is an example of a physical change? a) iron melting b) steel rusting c) paper burning d) wood decaying 19) a + b + c → d + e describe the mass of the reactants and products given the balanced chemical reaction. a) the mass of the products is 2/3 that of the reactants. b) the mass of the reactants equals the mass of the products. c) the mass of the reactants is less than the mass of the products. d) the mass of the reactants is greater than the mass of the products.

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