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ratelena [41]
3 years ago
9

Calculate the molarity of a 2.43 mol aqueous NaCl solution with a density of 2.00 g/mL.

Chemistry
1 answer:
anygoal [31]3 years ago
3 0

Answer:

You need to add more points people will not answer if its this low

Explanation:

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Select all that apply. Atoms are made up of _____. protons neutrons compounds elements electrons
charle [14.2K]

Answer:

protons, nuetrons, electrons

Explanation:

compounds and electrons are made up of atoms.

8 0
3 years ago
A 50 W engine generates 50 J of energy. How long did it run for?
Inessa [10]
The engine ran for 10 second
6 0
3 years ago
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If 4520 kj of heat is needed to boil a sample of water, what is the mass of water
Cerrena [4.2K]

Answer:

1,085g of water

Explanation:

If we have the value 4520kj is because the question is related to Energy and heat capacity. In this case, the law and equation that we use is the following:

                                                  Q= m*C*Δt  where;

Q in the heat, in this case: 4520kj

m is the mas

Δt= is the difference between final-initial temperature (change of temperature), in this exercise we don´t have temperatura change.

In order to determine the mass, I will have the same equation but finding m

                                          m= Q/C*Δt    without   m=Q/C

So: m= 4,520J/4.18J/g°C

      m= 1,0813 g

5 0
3 years ago
The formation of iodine is described by the following chemical equation:
olga nikolaevna [1]

Answer:

N2O2(g) +O2(g) ===> 2NO2(g)

Explanation:

For a nonelementary reaction, the reaction equation is described as the sum of all the steps involved. All these steps constitute the reaction mechanism. Each step in the mechanism is an elementary reaction. The rate law of the overall reaction involves the rate determining step (slowest step) in the reaction sequence.

Now look at the overall reaction 2NO(g) + O2(g) ---------> 2NO2(g)

The two steps in the mechanism are

2NO(g) --------->N2O2(g) (fast)

N2O2(g) +O2(g) -------> 2NO2(g) (slow)

Summing all the steps and cancelling out the intermediate N2O2(g), we obtain the reaction equation;

2NO(g) + O2(g) ---------> 2NO2(g)

Hence the answer.

7 0
3 years ago
Why do doctors worry more about a fever of a couple of degrees Celsius than a fever of a couple of degrees Fahrenheit
weeeeeb [17]
Because Celcius is a larger amount than Fahrenheit. The units are farther apart.
8 0
3 years ago
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