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34kurt
3 years ago
15

Which agent of erosion can create a limestone cave?

Chemistry
2 answers:
frutty [35]3 years ago
7 0

Answer:a

Explanation:

8090 [49]3 years ago
4 0
C will be your answer (acidic water)
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What does Hess's law state can be done in order to be able to react solid magnesium with oxygen gas safely (that is, without exp
aleksley [76]

Answer:

C. The reaction can be broken down and performed in steps

Explanation:

Hess's Law of Constant Heat Summation states that irrespective of the number of steps followed in a reaction, the total enthalpy change for the reaction is the sum of all enthalpy changes corresponding to all the steps in the overall reaction. The implication of this law is that  the change of enthalpy in a chemical reaction is independent of the pathway between the initial and final states of the system.

To obtain MgO safely without exposing magnesium to flame, the reaction sequence shown in the image attached may be carried out. Since the enthalpy of the overall reaction is independent of the pathway between the initial and final states of the system, the sum of the enthalpy of each step yields the enthalpy of formation of MgO.

3 0
2 years ago
The reaction 2a → a2​​​​​ was experimentally determined to be second order with a rate constant, k, equal to 0.0265 m–1min–1. if
katovenus [111]

The integrated rate law for a second-order reaction is given by:

\frac{1}{[A]t} =   \frac{1}{[A]0} + kt

where, [A]t= the concentration of A at time t,

[A]0= the concentration of A at time t=0

<span>k =</span> the rate constant for the reaction


<u>Given</u>: [A]0= 4 M, k = 0.0265 m–1min–1 and t = 180.0 min


Hence, \frac{1}{[A]t} = \frac{1}{4} + (0.0265 X 180)

<span>                                        = 4.858</span>

<span><span><span>Therefore, [A]</span>t</span>= 0.2058 M.</span>

<span>
</span>

<span>Answer: C</span>oncentration of A, after 180 min, is 0.2058 M

7 0
2 years ago
Read 2 more answers
se the following key to classify each of the elements below in its elemental form: A. Discrete atoms ... C. Metallic lattice B.
Lostsunrise [7]

Explanation:

the correct match can as follows:

1.  helium ⇒ discrete atoms (helium is an inert gas)

2. oxygen ⇒ molecules (oxygen exists in molecular form as O2)

3 Magnesium ⇒ matalic lattice ( Magnesium is a metal FCC crystal Structure :) )

4 Aluminum⇒ covalent network (since it is situated in the middle of the group and posses amphoteric properties too)

4 0
3 years ago
In 2018 Germany ran the first successful test of a fusion reactor shortly after china also ran a successful test imagine that th
pantera1 [17]

The pros of nuclear energy is the high power output generated while the cons is the damage the waste causes to organisms.

<h3>What is Nuclear energy?</h3>

This process involves the use of nuclear reactions such as fusion and fission to generate electricity.

It produces a high amount of power needed to cover a large population nut the disadvantage is that the waste can alter the genetic composition in organisms thereby resulting in mutation.

Read more about Nuclear energy here brainly.com/question/11963586

#SPJ1

7 0
2 years ago
Suzy steps on the scale and measures her weight to be 125 lbs. How much
igor_vitrenko [27]

Answer:

125 lbs would round to C. 56.8kg

3 0
3 years ago
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