2 years ago

In the winter , people often buy large bags of rock salt to sprinkle on their walkways . Why do people do this?

1 answer:

6 0

The salt causes the water to freeze at a lower temperature. When a solute, aka salt, is introduced to the system, the freezing point is lowered. This makes the water freeze at a lower temperature.

You might be interested in

WHAT IS THE CHEMICAL NAME FOR ALKYNE HAVING

madreJ [45]

Answer:

Ee your house 6r2f5r56rrrr6gjyf

Explanation:

4 0

1 year ago

True<br> or False: A force has to touch an object in order to affect it.<br> Hellppp

lesantik [10]

False :) :) :) :) :) :) :)

8 0

3 years ago

Describe the development of the modern periodic table

Simora [160]

There had been new discoveries of chemicals that have been added to the periodic table in recent years

8 0

2 years ago

What is the coefficient of MnO2when you balance the equation for this redox reaction? KCN( aq) + KMnO4( aq) + H2O( l) → KCNO( aq

chubhunter [2.5K]

Answer:

2MnO2 (s)

Explanation:

3KCN(aq) + 2KMnO4(aq) + 1H2O(l) → 3KCNO(aq) + 2MnO2(s) + 2KOH(aq)

Reactants:

K: 5

C: 3

N: 3

Mn: 2

O: 9

H: 2

Products:

K: 5

C: 3

N: 3

Mn: 2

O: 9

H: 2

8 0

2 years ago

How much energy is released when 20.0 g of water is cooled from 50°C to 30°C (Cwater= 4.18 J/ g*°C)

marissa [1.9K]

Answer:

1672 J

Explanation:

We are supposed to find out the energy released by water when cooled from 50° C to 30°C .

We have the relation that ,

H=msΔT

Information is given that s=4.18 J/ g*°C ,

m=20.0 g,

and ΔT is -20° C.

Hence by substituting we get,

H=-20*20*4.18

(minus symbol represents that energy is being released)

1672 J is release when water is cooled from 50° C to 30°C .

7 0

2 years ago