Chemistry, 19.10.2019 03:30 Jessifraser589

If 45.8 grams of potassium chlorate decomposes, how many grams of oxygen gas can be produced?

Answers: 3

Show answers

Answers

To do this problem, we must first look at the balanced chemical equation for the decomposition of potassium chlorate:

2KClO3 --> 2KCl + 3O2

We can take the given amount of grams, and use the molar mass of KClO3 to convert to moles. Then, we can use the stoichiometric ratios to relate moles of KClO3 to moles of O2.

(39.09)+(35.45)+(3*15.99)= 122.51 g/ mol = molar mass of KClO3
45.8 g KClO3/ 122.51 g/ mol KClO3 = .374 moles KClO3
.374 mol KClO3 *(3 moles O2/2 mol KClO3)= .560 moles O2

Once we have moles of O2, we can convert to grams of O2.

(2*15.99)= 31.98 g/mol = molar mass of O2
(.560 moles O2) (31.98 g/mol)= 17.91 g O2

Hope this helps :)

Answer from: Quest

water molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

Answer from: Quest

i think so it’s will be b yes i believe its

Another question on Chemistry

Chemistry, 22.06.2019 12:30

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Answers: 1

Answer

Chemistry, 22.06.2019 14:10

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

Answers: 1

Answer

Chemistry, 22.06.2019 20:30

Which of the following is not true about the atomic model of substances?

Answers: 1

Answer

Chemistry, 23.06.2019 01:30

Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. which term most likely describes what she is measuring?