1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nasty-shy [4]
3 years ago
8

Some scientists hypothesize that Earth's ozone layer is being damaged by

Chemistry
2 answers:
Amanda [17]3 years ago
6 0

Answer:

Some scientists hypothesize that Earth's ozone layer is being damaged by chlorofluorocarbons .

Explanation:

Please mark brainliest and have a great day!

Sladkaya [172]3 years ago
5 0

Answer:

chlorofluorocarbons

You might be interested in
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4
ddd [48]

Answer:

178.35g

Explanation:

Molarity of a solution can be calculated using the formula:

Molarity = number of moles ÷ volume

Based on the information provided in this question, molarity (M) of the solution = 1.50 M, volume = 725 mL = 725/1000 = 0.725L, n = ?

1.50 = n / 0.725

n = 1.50 × 0.725

n = 1.0875mol

Molar mass of Na3PO4

23(3) + 31 + 16(4)

= 69 + 31 + 64

= 164g/mol

Mole = mass ÷ molar mass

1.0875 = mass/164

mass = 178.35g

5 0
3 years ago
Question List (4 items) (Drag and drop into the appropriate area) Find the volume of HCl that will neutralize the base. Find the
expeople1 [14]

The question is incomplete, the complete question is:

The solubility of slaked lime, Ca(OH)_2, in water is 0.185 g/100 ml. You will need to calculate the volume of 2.50\times 10^{-3}M HCl needed to neutralize 14.5 mL of a saturated

<u>Answer:</u> The volume of HCl required is 290mL, the mass of Ca(OH)_2 is 0.0268g, the moles of

<u>Explanation:</u>

Given values:

Solubility of Ca(OH)_2 = 0.185 g/100 mL

Volume of Ca(OH)_2 = 14.5 mL

Using unitary method:

In 100 mL, the mass of Ca(OH)_2 present is 0.185 g

So, in 14.5mL. the mass of Ca(OH)_2 present will be =\frac{0.185}{100}\times 14.5=0.0268g

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(1)

Given mass of Ca(OH)_2 = 0.0268 g

Molar mass of Ca(OH)_2 = 74 g/mol

Plugging values in equation 1:

\text{Moles of }Ca(OH)_2=\frac{0.0268g}{74g/mol}=0.000362 mol

Moles of OH^- present = (2\times 0.000362)=0.000724mol

The chemical equation for the neutralization of calcium hydroxide and HCl follows:

Ca(OH)_2+2HCl\rightarrow CaCl_2+2H_2O

By the stoichiometry of the reaction:

Moles of OH^- = Moles of H^+ = 0.000724 mol

The formula used to calculate molarity:

\text{Molarity of solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (mL)}} .....(2)

Moles of HCl = 0.000724 mol

Molarity of HCl = 2.50\times 10^{-3}

Putting values in equation 2, we get:

2.50\times 10^{-3}mol=\frac{0.000724\times 1000}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{0.000725\times 1000}{2.50\times 10^{-3}}=290mL

Hence, the volume of HCl required is 290mL, the mass of Ca(OH)_2 is 0.0268g, the moles of

5 0
3 years ago
What gas is necessary for combustion to take place
madreJ [45]
Oxygen for complete combustion
6 0
3 years ago
Read 2 more answers
What is the maximum amount of kcl that can dissolve in 200 g of water? (the solubility of kcl is 34 g/100 g h2o at 20°c.) (1 poi
Solnce55 [7]
The answer is 68g
hope this helps!!
5 0
4 years ago
what happens to the yield of hydrogen if the reaction is carried out at a higher temperature but at the same pressure​
valkas [14]

Answer: It increases the rate of desulfurization at a constant feed rate

Explanation:

5 0
3 years ago
Other questions:
  • What element has three electrons in its 5d sublevel? nd nb ta u
    10·2 answers
  • What elements can be joined by a covalent bond?
    15·1 answer
  • Infer: Is the reaction below possible? Explain why or why not. H2O + NaOH NaCl + H2
    7·1 answer
  • Oil is a natural resource that is found inside of Earth. Oil can be used
    10·1 answer
  • You may remember that fresh water is the only type of water humans and animals can drink. For this reason, it is essential to li
    9·1 answer
  • What is called oxidizing agent and reducing agent?
    10·1 answer
  • Different types of cells​
    8·2 answers
  • State the types of change that take place in each of the following
    10·1 answer
  • 2. How can where you live affect the amount of available water to use?
    9·1 answer
  • Carbon and oxygen combine to form carbon dioxide. What are the reactants, or what
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!