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sergij07 [2.7K]
3 years ago
15

Which of these best describes Earth’s core?

Chemistry
2 answers:
navik [9.2K]3 years ago
6 0

the answer is a because the earth is made of different layers hens the core being a rock

Monica [59]3 years ago
5 0
Hello!

Your answer is A.. Earth's core is the most dense layer and it consists of the outer core and the inner core.

Hope this helps :))
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Hawaii, which sits over a hot spot located near the center of the Pacific
Gnoma [55]

Answer:

Shield Volcano . I've been their before

Explanation:

4 0
2 years ago
What is the electronic structure of carbon
horsena [70]

Answer:

[He] 2s2 2p2

Explanation:

5 0
3 years ago
A similarity between the forces involved in both ionic and covalent bonding is that both A. involve the sharing of electrons. B.
NISA [10]

Answer:

C. involve the attraction of opposite charges

Explanation:

<em>Ionic bonding</em> involves the attraction between <em>oppositely charged ions</em>, as in Na⁺ Cl⁻.

<em>Covalent bonding</em> involves the attraction between <em>negatively charged electrons and positivey charged nuclei</em>, as in a C-H bond.

A is <em>wrong</em>. Ionic bonding involves the transfer of electrons.

B is <em>wrong</em>. Covalent bonding involves the sharing of electrons.

D is <em>wrong</em>. Ionic bonds are usually stronger than covalent bonds.

5 0
3 years ago
Answer the lab question (“What is the effect of temperature on the solubility of a solid in a liquid?”) with a hypothesis:
valkas [14]

Explanation:

When experimenting, the best hypothesis to develop would be a null hypothesis (H₀). A null hypothesis is a statement indicating no change or effect.  In this case, it would be;

“There is no effect of temperature on the solubility of a solid in a liquid”

An alternative hypothesis (Hₐ) would be;

“There is an effect of temperature on the solubility of a solid in a liquid”

In this experiment, the null hypothesis would be rejected and the alternative would be accepted. This is because the experiment would show that increased temperatures of the liquid increases solubility of the solid in the liquid.

8 0
3 years ago
Read 2 more answers
The decomposition of N2O to N2 and O2 is a first-order reaction. At 730°C, the rate constant of the reaction is 1.94 × 10-4 min-
grin007 [14]

Answer:

Total pressure 5.875 atm

Explanation:

The equation for above decomposition is

2N_2O \rightarrow 2N_2 + O_2

rate constant k =  1.94\times 10^{-4} min^{-1}

Half life t_{1/2} = \frac{0.693}{k} = 3572 min

Initial pressure N_2 O = 4.70 atm

Pressure after 3572 min = P

According to first order kinematics

k = \frac{1}{t} ln\frac{4.70}{P}

1.94\times 10^{-4} = \frac{1}{3572} \frac{4.70}{P}

solving for P we get

P = 2.35 atm

2N_2O \rightarrow 2N_2 + O_2

initial           4.70                         0             0

change        -2x                          +2x           +x

final             4.70 -2x                     2x           x

pressure ofO_2 after first half life  = 2.35 = 4.70 - 2x

                                                          x = 1.175

pressure of N_2 after first half life  =  2x = 2(1.175) = 2.35 ATM

Total pressure  = 2.35 + 2.35 + 1.175

                          = 5.875 atm

5 0
3 years ago
Read 2 more answers
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