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2 years ago

Can you help me please?

Chemistry

1 answer:

almond37 [142]2 years ago

7 0

Explanation:

Physical changes only change the appearance of a substance, not its chemical composition.

Chemical changes cause a substance to change into an entirely substance with a new chemical formula.

Chemical changes are also known as chemical reactions. The “ingredients” of a reaction are called reactants, and the end results are called products

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Olegator [25]

Answer:

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9. Molten Magma

10. Natural

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12. Solid

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3 years ago

3. Write a hypothesis that explains your inference about the acidity of the paper. How might you test your hypothesis by extendi

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Answer:

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Explanation:

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3 years ago

one side of a cube measures 0.53 cm. the mass of the cube is 0.92 g. what is the density of the cube

ziro4ka [17]

Answer:

6.17 g/cm³

Explanation:

Data given:

one side of cube = 0.53 cm

mass of the cube is 0.92 g

density of the cube = ?

Solution:

First we will calculate for volume the cube

As we know all the sides or edges of a cube are equal so volume equation will be

So,

V = length x width x height

V = e³

as on side = 0.53 cm

then

V = (0.53 cm)³

V = 0.149 cm³

Now we will calculate density of cube

To calculate density, formula will be used

d = m/v . . . . . (1)

where

d = density

m = mass

v = volume

put values in above formula 1

d = 0.92 g / 0.149 cm³

d = 6.17 g/cm³

so. the density of cube = 6.17 g/cm³

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3 years ago

The number at the end of an isotope’s name is the ____ number. A) Atomic B)neutron C)mass D)electron

storchak [24]

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3 years ago

Read 2 more answers

Which would be the best way to represent the concentration of a 1. 75 M K2CrO4 solution? 1. 75% K2CrO4 [K2CrO4] (K2CrO4) K2CrO4,

tekilochka [14]

The amount of the solute present in the given solution is called the concentration. The best way to represent the concentration of the solution is $\rm [K_{2}CrO_{4}].$

<h3>What is molar concentration?</h3>

Molar concentration is the molarity of the solution that is the measure of the concentration of the solute dissolved in the solution.

The formula for calculating molar concentration is given as,

$\rm Molarity = \dfrac{\text{moles of solute}}{\text{Solution in L}}$

The concentration of any substance is represented in the square bracket like $\rm [X]$ or $\rm [K_{2}CrO_{4}].$

Therefore, option B. $\rm [K_{2}CrO_{4}]$ is the representation of the concentration.

Learn more about the molarity here:

brainly.com/question/1532164

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2 years ago