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alisha [4.7K]
3 years ago
8

1. Calcium chloride is a salt that is added to roads and sidewalks

Chemistry
1 answer:
Sholpan [36]3 years ago
8 0

Answer:

(d) In the presence of sulfuric acid, calcium chloride reacts to form hydrogen chloride.

Explanation:

It's because it lowers the melting point of the ice / etc so I think it is, but check it yourself too!

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The density of concentrated ammonia, which is 28.0% w/w nh3, is 0.899 g/ml. what volume of this reagent should be diluted to 1.0
vlada-n [284]

Answer: 2.4 ml

Solution :

Molar mass of NH_3 = 17 g/mole

Given,: 28% w/w of NH_3 solution means 28 g of ammonia in 100 g of solution.

Mass of solution = 100 g

Now we have to calculate the volume of solution.

Volume=\frac{Mass}{Density}=\frac{100g}{0.899g/ml}=111.2ml  

Molarity : It is defined as the number of moles of solute present in one liter of solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute NH_3=\frac{\text {given mass}}{\text {molar mass}}=\frac{28}{17}=1.65moles

V_s = volume of solution in liter = 0.11 L

Now put all the given values in the formula of molarity, we get

Molarity=\frac{1.65moles}{0.11L}=15mole/L

Using molarity equation:

M_1V_1=M_2V_2

15\times V_1=0.036\times 1.0\times 10^{3}

V_1=2.4ml

6 0
3 years ago
A few pieces of dry ice, CO2(s), at -78°C are placed in a flask that contains air at 21°C. The flask is sealed by placing an uni
arsen [322]
The direction of heat flow is from surroundings to system (air to ice), the dry ice is subliminating.
8 0
3 years ago
Read 2 more answers
What is the difference between Renewable Energy and Non renewable Energy? Which one is better for the environment and why? Also
goblinko [34]

Answer:

The difference between them is that renewable energy is something that can be used practically and not run out. Non-renewable energy has a limited supply.

Explanation:

Renewable energy is better for the environment as it is not something that takes millions of years to form, as some non-renewable energy sources are.

Brainliest please! :>

6 0
2 years ago
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If the mass is 10g and the volume<br> is 2cm3 what is the density?
SSSSS [86.1K]

Answer:

The density is 5 g/cm3

Explanation:

The density (δ) is the ratio between the mass and the volume of a compound:

δ=m/v= 10 g/2 cm3= 5 g/cm3

3 0
3 years ago
2C2H2(g) + 502(g) → 4C02(g) + 2H20(g) reaction type?
ratelena [41]

Answer:

The answer is combustion.

7 0
2 years ago
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