CHEMISTRY HIGH SCHOOL

Martin uses 5/8 of a gallon of paint to cover4/5 of a wall. What is the unit rate at which Martin paints in walls per gallon

Answers

Answer 1

Answer:

Answer:

Unit rate at which Martin paints in walls per gallon is $(32)/(25) wall/gallon$ .

Explanation:

Rate is defined as ratio between two quantities with different units.

Gallons of paint used by Martin = $(5)/(8)$ gallons

Portion of wall Martin wishes to pint = $(4)/(5)$ wall

Rate at which Martin paints the wall:

$Rate=\frac{\text{Portion of wall covered}}{\text{Paint used}}$

$Rate=((4)/(5) wall)/((5)/(8) gallon)=(32)/(25) wall/gallon$

Unit rate at which Martin paints in walls per gallon is $(32)/(25) wall/gallon$ .

Related Questions

Which statement describes the particles of an ideal gas based on the kinetic molecular theory?(1) The gas particles are relatively far apart and have negligible volume.(2) The gas particles are in constant, nonlinear motion.(3) The gas particles have attractive forces between them.(4) The gas particles have collisions without transferring energy.
Select the correct scientific notation form of this numeral using only 2 significant figures. 5,489.6654
An atom of titanium has an atomic number of 22 and a mass number of 49. Calculate the number of protons and neutrons in this atom. If the atom of titanium is neutral, how many electrons are in the atom?
At higher elevations, the boiling point of water decreases, due to the decrease in atmospheric pressure. As a result, what conclusion could be drawn from the boiling egg?a.At higher elevations, it would take less time to hard boil an egg, because there is less atmospheric pressure. b. At higher elevations, it would take longer to hard boil an egg, because there is a lower boiling point, so the egg is boiling in water at a lower temperature. c. At higher elevations, it would take less time to hard boil an egg, because there is a lower boiling point. Therefore it would take less time to achieve the boiling point. d. At higher elevations, it would take longer to hard boil an egg, because it would take longer to achieve the boiling point.
Water(H2O) is composed of the same elements as carbon monoxide (CO). How do their properties compare?A. They have the same properties because they have the same arrangement of atoms. B. They have different properties because the arrangement of atoms is different. C. They have the same properties because they have the same atoms. D. They have different properties because they have different atoms.Answer is B.

H-H-C=C-H-H + Br—Br —> H-H-Br- C-C-H-Br-H

Answers

Answer:

Complexity.

Explanation:

Okay, I am NOT explaining this whole thing, but simply, C2n product.

Don't ask. Just don't.

What mass of anhydrous solute is needed to prepare 500 mL of 0.032 M NaF(aq)? Answer in units of g.

Answers

Volume 500 mL in liters : 500 / 1000 = 0.5 L

Molar Mass NaF = 41.98 g/mol

Molarity = 0.032 M

Mass = Molarity * molar mass * volume

Mass = 0.032 * 41.98 * 0.5

= 0.67168 g of NaF(aq)

hope this helps!

Consider the mixture of ethanol, c2h5oh, and o2. how many molecules of co2, h2o, c2h5oh, and o2 will be present if the reaction goes to completion?

Answers

The reaction between ethanol and oxygen must be a combustion reaction to give carbon dioxide and water as products.

The reaction between ethanol, $C_2H_5OH$ and oxygen, $O_2$ is as follows:

$C_2H_5OH+O_2\rightarrow CO_2+H_2O$

In order to balance the reaction (the number of atoms of each element in the reaction are same on both the sides that is product and reactant), $O_2$ is multiplied by 3 in the reactant side and $CO_2$ is multiplied by 2 and $H_2O$ is multiplied by 3 on product side.

So, the balanced reaction is:

$C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O$

From the balanced reaction it is clear that 1 mole of $C_2H_5OH$ reacts with 3 moles of $O_2$ to give 2 moles of $CO_2$ and 3 moles of $H_2O$ .

Since, 1 mole = $6.022* 10^(23)$ molecules (Avogadro's number)

So,

Number of molecules of $C_2H_5OH$ = $6.022* 10^(23)$ molecules.

Number of molecules of $O_2$ = $6.022* 10^(23)* 3 = 18.066* 10^(23)$ molecules.

Number of molecules of $CO_2$ = $6.022* 10^(23)* 2 = 12.044* 10^(23)$ molecules.

Number of molecules of $H_2O$ = $6.022* 10^(23)* 3 = 18.066* 10^(23)$ molecules.

Answer : The number of molecules of $CO_2,H_2O,C_2H_5OH\text{ and }O_2$ are 2, 3, 1 and 3 respectively.

Explanation :

The given balanced chemical reaction is,

$C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O$

Balanced chemical reaction is the reaction in which the number of atoms of an individual elements present on reactant side must be equal to the product side.

The species present on the left side of the right arrow is the reactant and the species present on the right side of the right arrow is the product.

From the balanced chemical reaction, we conclude that there are 1 molecule of $C_2H_5OH$ , 3 molecules of $O_2$ , 2 molecules of $CO_2$ and 3 molecules of $H_2O$ .

7 An atom that has 13 protons and 15 neutrons is an isotope of the element(1) nickel (3) aluminum
(2) silicon (4) phosphorus

Answers

an atoms identity is always defined by the number of protons and it is seen in the periodic table so if an atom has 13 protons it will be aluminum

A solution of NaOH is titrated with H2SO4. It is found that 20.05 mL of 0.3564 M H2SO4 solution is equivalent to 43.42 mL of NaOH solution. What is the concentration of NaOH?