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vitfil [10]
3 years ago
12

1) Choose the correct statement from the options below.

Chemistry
2 answers:
docker41 [41]3 years ago
6 0

Number (1), the answer is D

Number (2), the answer is A

Elena L [17]3 years ago
3 0

<u>Answer:</u>

For 1: The correct answer is Option D.

For 2: The correct answer is Option A.

<u>Explanation:</u>

  • <u>For 1:</u>

Polar molecules are defined as the of molecules, in which two atoms that combine must be of different element and therefore can create a dipole. For a dipole, there must be a difference in electronegativity and that is achieved when two atoms of different electronegativity combine. The negative dipole or charge is created on the electronegative atom and positive dipole or charge is created on the electropositive atom.

Thus, the correct answer is option D.

  • <u>For 2:</u>

Non-polar molecules are defined as the molecules which are formed when two atoms of same element combine, so that a dipole cannot be created. When there is no dipole, there will be no difference in electronegativity and this is achieved when two atoms of same electronegativities combine.

Thus, the correct answer is A.

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Calculate the molar mass of the following compound: Ca3P2
julia-pushkina [17]

Answer:

The molar mass of the compound given is 182.182 g/mol.

Explanation:

To calculate the molar mass of the compound, we must multiply the number of moles of each element by the the individual molar mass of each element and add them together.

Let's start with Calcium.  The molar mass of Calcium is 40.078.  In this compound, we have three moles of Calcium, so we should multiply this number by 3.

40.078 g/mol * 3 mol = 120.234 g

Now, let's do the same for Phosphorus.

30.974 g/mol * 2 g/mol = 61.948 g

To find the molar mass of the entire compound, we should add these two values together.

120.234 g + 61.948 g = 182.182 g

Therefore, the correct answer is 182.182 g/mol.

Hope this helps!

6 0
3 years ago
I need to know what the answer to number 4 letter a.
QveST [7]
I believe it is C. I hope
4 0
3 years ago
Read 2 more answers
Calcium chloride, CaCl2, is commonly used as an electrolyte in sports drinks and other beverages, including bottled water. A sol
zhannawk [14.2K]

Answer:

Mole percent of CaCl_{2} in solution is 1.71%

Explanation:

Number of moles of a compound is the ratio of mass to molar mass of the compound.

Molar mass of CaCl_{2} = 110.98 g/mol

Molar mass of H_{2}O = 18.02 g/mol

Density is the ratio of mass to volume

So, mass of 60.0 mL of water = (60\times 0.997)g=60.8g

Hence, 6.50 g of CaCl_{2} = \frac{6.50}{110.98}moles of CaCl_{2} = 0.0586 moles of CaCl_{2}

60.8 g of H_{2}O= \frac{60.8}{18.02}moles of H_{2}O = 3.37 moles of H_{2}O

So, mole percent of CaCl_{2} in solution = \frac{n_{CaCl_{2}}}{n_{total}}\times 100% = \frac{0.0586}{0.0586+3.37}\times 100% = 1.71%

5 0
4 years ago
Which of these is the best definition of a fuel cell?
oksian1 [2.3K]

Answer:

A voltaic cell that uses the oxidation of a fuel to produce electricity  

Explanation:

A fuel cell is a voltaic cell that converts the chemical energy of a fuel and an oxidizing agent into electricity.

A. is wrong. This definition is so broad that it could include a candle in a cup.

C is wrong. The batteries in flashlights and cell phones are not fuel cells.

 

3 0
3 years ago
How many atoms of copper are there in 95.5 moles of copper?
aksik [14]

Answer:

Explanatio≡

6.022

×

10

22

 

copper atomsn:

4 0
3 years ago
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