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3 years ago

Putting rock salt on the roads during a snowstorm is an example of

Chemistry

2 answers:

Shkiper50 [21]3 years ago

4 0

Answer: Depression in Freezing Point

Explanation: When salt is kept on the icy roads, it will form a liquid layer over it thereby lowering the freezing point below the ice. Thus when this salty liquid comes into the contact with the other ice present on the road making the other ice get melt.

This keeps on decreasing the olume of the ice on the road.

Thus it is always advised to put rock salts on the roads during a snowstorm.

Elis [28]3 years ago

3 0

The answer could honestly be as simple as "Putting rock salt on the roads during a snowstorm is an example of a chemical reaction" but due to lack of context I'm not sure, hope this helps anyways!

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2. Calculate the density of a metal that occupies 17.75 cm and has a mass of 342.93 g. [D = m/V]

satela [25.4K]

Answer:

19.32

Explanation:

the density is given by the mass over volume

the mass In this case is 342.93 and the volume is 17.75

d=342.93g/17.75cm

=19.32g/cm

i hope this helps

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3 years ago

What is the molarity of a 17.0% by mass solution of sodium acetate, NaC2H3O2 (82.0 g/mol), in water? The density of the solution

sattari [20]

Answer:

[NaCH₃COO] = 2.26M

Explanation:

17% by mass is a sort of concentration. Gives the information about grams of solute in 100 g of solution. (In this case, 17 g of NaCH₃COO)

Let's determine the volume of solution, by density

Mass of solution / Volume of solution = Solution density

100 g / Volume of solution = 1.09 g/mL

100 g / 1.09 g/mL = 91.7 mL

17 grams of solute is contained in 91.7 mL

Molarity (M) = Mol of solute /L of solution

91.7 mL / 1000 = 0.0917L

17 g / 82 g/m = 0.207 moles

Molariy = 0.207 moles / 0.0917L → 2.26M

4 0

3 years ago

Three bags containing different number of wooden cubes are dropped from the same height. Which of the following statements is tr

dezoksy [38]

Answer:

I don't have the number of cubes in each bag, but whichever bag had the most cubes would have the most kinetic energy as it falls

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3 years ago

How do many indoor environments generally compare to outdoor environments in terms of pollution? Indoor environments are much le

brilliants [131]

"Indoor environments are much less polluted than outdoor <span>environments" is the best option since indoor environments often rely on separate air and ventilation systems. </span>

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3 years ago

For the reaction shown, calculate how many moles of NO2 form when each amount of reactant completely reacts.

Anton [14]

Answer:- 2.4 mol $NO_2$ .

Solution:- It asks to calculate the moles of $NO_2$ formed when 1.2 moles of $N_2O_5$ are reacted.

There is 2:4 mol ratio between $N_2O_5$ and $NO_2$ . So, the moles of reactant are multiplied by the mol ratio to get the moles of $NO_2$ . The calculations are shown below:

$1.2mol N_2O_5(\frac{4mol NO_2}{2mol N_2O_5})$

= 2.4 mol $NO_2$

So, 2.4 moles of $NO_2$ are formed when 1.2 moles of $N_2O_5$ were reacted.

7 0

3 years ago

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