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3 years ago

NEED THIS NOW PLZ!!!

Chemistry

2 answers:

Norma-Jean [14]3 years ago

7 0

Answer:

Centimeters per minute

Explanation:

Speed measurement is formated as [distance] per [time], like miles per hour.

B and C are incorrect because they are [time] per [distance]

A is incorrect because it is [time] per [time]

vitfil [10]3 years ago

7 0

Answer : The correct option is (D) Centimeters per minute

Explanation :

Speed : It is defined as the distance traveled by the object per unit time.

The unit of distance are, kilometer, meter, centimeter etc.

The unit of time are, minute, second, hour etc.

Formula used :

$Speed=\frac{Distance}{Time}$

From the given options, the correct measurement of speed is centimeters per minute.

Hence, the correct option is (D) Centimeters per minute

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The energy associated with a current is called____________

tatyana61 [14]

Answer:

D. Electrical energy

Explanation:

I assume you are talking about an electrical current.

(These are by what I know and are simplified, not an exact definition)

A. Mechanical energy is energy that something has because of motion.

B. Magnetism is the attracting and repulsing forces between magnets.

C. Geothermal energy is heat inside of the Earth. Used as source of power.

D. Electrical energy is the result of an electric charge.

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2 years ago

Parker has a toy car he has made out of plastic building blocks. He breaks it apart so he can build something different with the

maria [59]

Answer:

Explanation:

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2 years ago

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Hi :) how to do 4(b)?

boyakko [2]

When acid and base solutions react, they produce water and a neutral ionic compound called a salt. The reaction is called a neutralization reaction.

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3 years ago

Read 2 more answers

Which substance is correctly identified as a homogeneous or heterogeneous mixture?

larisa86 [58]

Answer:

Explanation:

A salad with lettuce, cheese, seeds, tomatoes, broccoli, and other vegetables is an example of a heterogeneous mixture.

Milk is not mixed with anything so that is incorrect

River water is mixed in with dirt and minerals so this one is incorrect

Beach sand is incorrect because you can see colored particles.

7 0

3 years ago

A sample of ammonia gas was allowed to come to equilibrium at 400 K. 2NH3(g) <---> N2(g) 3H2(g) At equilibrium, it was fou

Softa [21]

Answer:

Kc for this equilibrium is 2.30*10⁻⁶

Explanation:

Equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction and the concentrations of reactants and products are held constant.

Being:

aA + bB ⇔ cC + dD

the equilibrium constant Kc is defined as:

$Kc=\frac{[C]^{c}*[D]^{d} }{[A]^{a} *[B]^{b} }$

In other words, the constant Kc is equal to the multiplication of the concentrations of the products raised to their stoichiometric coefficients by the multiplication of the concentrations of the reactants also raised to their stoichiometric coefficients. Kc is constant for a given temperature, that is to say that as the reaction temperature varies, its value varies.

In this case, being:

2 NH₃(g) ⇔ N₂(g) + 3 H₂(g)

the equilibrium constant Kc is:

$Kc=\frac{[N_{2} ]*[H_{2} ]^{3} }{[NH_{3} ]^{2} }$

Being:

[N₂]= 0.0551 M
[H₂]= 0.0183 M
[NH₃]= 0.383 M

and replacing:

$Kc=\frac{0.0551*0.0183^{3} }{0.383^{2} }$

you get:

Kc= 2.30*10⁻⁶

<u><em>Kc for this equilibrium is 2.30*10⁻⁶</em></u>

8 0

3 years ago