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3 years ago

Use the drop-down menus to complete the statements about inertia, earth, and the moon.

Chemistry

2 answers:

Dimas [21]3 years ago

8 0

1) inertia 2) gravity 3) greater

Inga [223]3 years ago

7 0

Answer:

1) inertia 2) gravity 3) greater

Explanation:

Use the drop-down menus to complete the statements about inertia, earth, and the moon.

The moon’s 1.____ tries to push it off into space in a straight line, but earth’s 2.______ keeps the moon in orbit. The moon and earth are similar in that they both orbit around a body with 3._____ mass.

#1 answers: orbit, inertia

#2 answers: gravity, motion

#3 answers: greater, the same

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The pH of a saturated solution of a metal hydroxide MOH is 10.15. Calculate the Ksp for this compound.

Airida [17]

Answer:

$Ksp=2.00x10^{-8}$

Explanation:

Hello!

In this case, since the pH of the given metal is 10.15, we can compute the pOH as shown below:

$pOH=14-pH=14-10.15=3.85$

Now, we compute the concentration of hydroxyl ions in solution:

$[OH^-]=10^{-pOH}=10^{-3.95}=1.41x10^{-4}M$

Now, since this hydroxide has the form MOH, we infer the concentration of OH- equals the concentration of M^+ at equilibrium, assuming the following ionization reaction:

$MOH(s)\rightarrow M^+(aq)+OH^-(aq)$

Whose equilibrium expression is:

$Ksp=[M^+][OH^-]$

Therefore, the Ksp for the saturated solution turns out:

$Ksp=1.41x10^{-4}*1.41x10^{-4}\\\\Ksp=2.00x10^{-8}$

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2 years ago

Burning fossil fuels creates the ___________ gas carbon dioxide which increases global temperatures.

Flauer [41]

Greenhouse gas is your answer it is causing the greenhouse effect of trapping heat in the earth

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2 years ago

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What two factors determine the thermal energy in a substance

Eduardwww [97]

The answer to that is mass and chemical

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3 years ago

Which statement describes a scientific theory?

vichka [17]

Best Answer
C) is the best description, although a scientific theory is not necessarily a "fact". They are, however, based on evidence.

A) is complete garbage.

B) is a good description of a scientific "law"- something that predicts how a certain event will occur without explaining why this is (for instance, the law of gravity accurately describes the gravitational forces between two bodies, but does not explain why these forces are there).

D) is a scientific "hypothesis"- an explanation for an observed phenomena that is yet to be proven.

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3 years ago

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Calculate the amount of water required to prepare 500g of 2.5% solution of sugar.

Snowcat [4.5K]

(i) We start by calculating the mass of sugar in the solution:

mass of sugar = concentration × solution mass

mass of sugar = 2.5/100 × 500 = 12.5 g

Then now we can calculate the amount of water:

solution mass = mass of sugar + mass of water

mass of water = solution mass - mass of sugar

mass of water = 500 - 12.5 = 487.5 g

(ii) We use the following reasoning:

If 500 g solution contains 12.5 g sugar

Then X g solution contains 75 g sugar

X=(500×75)/12.5 = 3000 g solution

Now to get the amount of solution in liters we use density (we assume that is equal to 1):

Density = mass / volume

Volume = mass / density

Volume = 3000 / 1 = 3000 liters of sugar solution

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3 years ago