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3 years ago

What is an effect of gravity on objects on the surface of Earth? Check all that apply.

Chemistry

2 answers:

Flauer [41]3 years ago

9 0

Answer: The correct statements are:

Objects “fall” toward the center of Earth.
Objects accelerate at a rate of 9.8 m/s each second.
Objects are pulled by Earth more strongly than they pull on Earth.

Explanation:

The gravity of the earth is the force which attracts the object to the center of the earth. When the any object with mass falls under the action of the gravity attains the acceleration of 9.8 $m/s^2$ .

Objects “fall” toward the center of Earth.
Objects accelerate at a rate of 9.8 m/s each second.
Objects are pulled by Earth more strongly than they pull on Earth.

dexar [7]3 years ago

6 0

Answer:

options 1 and 3 are correct. Objects “fall” toward the center of Earth. Objects accelerate at a rate of 9.8 m/s each second.

Explanation:

The reason option 5 is false is because of Newton's Third Law, stating that for every action, there is an equal and opposite reaction. So the action and reaction forces by the Earth and the object are equal to one another.

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In an unconformity between two layers of rock, how is the lower layer usually described?

zepelin [54]

A is the answer to the question

7 0

3 years ago

Read 2 more answers

Determine the [H3O+] in a 0.265 M HClO solution. The Ka of HClO is 2.9 × 10-8.

dexar [7]

8.8 × 10-5 M is the [H3O+] concentration in 0.265 M HClO solution.

Explanation:

HClO is a weak acid and does not completely dissociate in water as ions.

the equation of dissociation can be written and ice table to be formed.

HClO +H2O ⇒ ClO- + H3O+

I 0.265 0 0

C -x +x +x

E 0.265-x +x +x

Now applying the equation of Ka, where Ka is given as 2.9 × 10-8.

Ka = $\frac{[ClO-][H3O+]}{[HClO]}$

2.9 × 10^-8 = $\frac{[x] [x]}{[0.265-x]}$

$x^{2}$ = 7.698 x $10^{-9}$

x = 8.8 × 10-5 M

The hydronium ion concentration is 8.8 × 10-5 M in 0.265 M solution of HClO.

8 0

3 years ago

A catalyst is used in the chemical reaction to break down hydrogen peroxide into water and oxygen. At the end of the reaction, t

Natasha_Volkova [10]

At the end of the reaction, the catalyst is UNCHANGED.
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8 0

3 years ago

Select the keyword or phrase that will best complete each sentence.

pishuonlain [190]

Answer:

1) acetylide

2) enol

3) aldehydes

4) tautomers

5) alkynes

6) Hydroboration

7) Keto

8) methyl ketones

Explanation:

Acetylide anions (R-C≡C^-) is a strong nucleophile. Being a strong nucleophile, we can use it to open up an epoxide ring by SN2 mechanism. The attack of the acetylide ion occurs from the backside of the epoxide ring. It must attack at the less substituted side of the epoxide.

Oxomercuration of alkynes and hydroboration of alkynes are similar reactions in that they both yield carbonyl compounds that often exhibit keto-enol tautomerism.

The equilibrium position may lie towards the Keto form of the compound. Usually, if terminal alkynes are used, the product of the reaction is a methyl ketone.

3 0

3 years ago

What term is used to describe the energy level of any level higher than the ground state of a particle?

Xelga [282]

Answer:

B. Excited state

Explanation:

Energy levels higher than the ground state are called the excited states. This concept is based on the premise that electrons can move round the nucleus in certain permissibe orbits or energy levels.

The ground state is the lowest energy state available to the electron. This is usually the most stable state.

The excited state is any level higher than the ground state. An electron in an energy level has a definite amount of energy associated with it at that level.

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3 years ago