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solong [7]
3 years ago
6

How would scientists most likely describe the system of the Earth in regard to energy?

Chemistry
1 answer:
Nuetrik [128]3 years ago
8 0

Answer:

4 is the best answer but incomplete.

Explanation:

Heat from the Earth is also radiated back into space. The in and out of energy is what makes it an open system.

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How are matter and substances related?
Nitella [24]
Matter and substance are definitely related. All substances are matter but all matters are not substance. A matter can consist of numerous substances. Matter is generally a loose term used in respect to a substance. Any physical object can be casually called a matter. Matter and substance are sometimes used for the same context, but it is completely wrong. Numerous examples have already proved that a matter may or may not be a substance depending on its physical nature, but a substance is always a matter.


8 0
3 years ago
You wish to make 250. mL of 0.20 M KCl from a stock solution of 1.5 M KCl and DI water.
Nitella [24]

The question requires us to use the dilution formula M_iV_i=M_fV_f, where M_i and V_i are the stock concentration and volume respectively, then M_f and V_f are the dilute concentration and volume respectively.

a. C_s_t_o_c_k= 1.5 M KCI, C_d_i_l_u_t_e=0.20M KCl, V_d_i_l_u_t_e=250ml KCl

b.M_iV_i=M_fV_f\\\implies V_i= \frac{M_fV_f}{M_i} = \frac{0.20M \times 250ml}{1.5M} = 33.3\ ml

To prepare the solution 33.3ml of 1.5M KCl is diluted to a total final volume of 250ml.


8 0
4 years ago
If an atom, like a metal atom, has fewer valence electrons,
Gre4nikov [31]

Answer:

ionic bonding or covalent

Explanation:

7 0
2 years ago
Which characteristic is not used to categorize different types of landforms?
Oduvanchick [21]
It seems that you have not added the necessary options for us to answer this question so I had to look for it. But anyway, here is the answer. The characteristic that is NOT used <span>to categorize different types of landforms is this: a natural physical feature of the Earth's surface. Hope this answer helps.</span>
8 0
3 years ago
CaCl2 + Mg3N2 --&gt;<br><br> how do i balance this?
klemol [59]
Ca3N2+3MgCl2 (double replacement)
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3 years ago
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