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nirvana33 [79]
4 years ago
8

If an atom contains 12 protons and 10 neutrons, what's its mass number?

Chemistry
1 answer:
user100 [1]4 years ago
7 0
A = Z + n

A = 12 + 10

A = 22

Answer C

hope this helps!
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A. List three things that your body strives to keep constant. (example metabolism)
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b would be the best none of the rest make any sense.

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3 years ago
If oxygen with an electronegativity of 3.5 were to make a chemical bond with lithium, electronegativity of 1.0, what kind of bon
sergejj [24]

Answer:

Ionic.

Explanation:

Elements with higher electronegativity values are better at attracting electrons in a chemical bond.  

  • A chemical bond is considered "ionic" if the electronegativity difference between the two bonding atoms is greater than 1.8.
  • Otherwise, this chemical bond is considered "covalent".

In this example, the difference between the electronegativity of oxygen and lithium is 3.5 - 1.0 = 2.5. Since 2.5 > 1.8, the bond between the two elements would likely be ionic.

It is possible to reach the same conclusion based on the fact that lithium is a metal while oxygen is a nonmetal. When metal elements react with non-metal elements, the product is typically an ionic compound- with ionic bonds between the atoms.

6 0
2 years ago
Given a condensed structural formula, write a line-angle formula for (CH3)2CHCH(CH3)2
Vlada [557]

Answer : The line-angle formula for (CH_3)_2CHCH(CH_3)_2 is shown below.

Explanation :

Condensed structural formula : It is a formula in which the lines are used between the bonded atoms and the atoms are also shown in the structural formula.

Line-angle formula : In the line-angle formula, the carbon atoms are represented at the corner and ends of the lines with some angle and the hydrogen atoms are hidden.

The line-angle formula for (CH_3)_2CHCH(CH_3)_2 is shown below.

5 0
3 years ago
The best material to be used in making cooking pots handles is made of: a. Polypropylene b. Bakelite c. Rubber d. Polyethylene
frutty [35]

Answer:

b. Bakelite

Explanation:

Bakelite -

Bakelite is a form if plastic , and is the very first plastic synthesized .

The handles of the cooking utensils are used to hold the utensil firmly , and hence need not turn hot while cooking , and need to be strong enough to take care of the food .

Hence , the handle should be of the material which is poor conductor of heat and strong .

Hence , bakelite is used for making the handle.

6 0
3 years ago
If a container holds 1mol of hydrogen, 2.5mol of helium, and 2mol of oxygen at a total pressure of 4atm, what is the partial pre
nlexa [21]

Answer:

Partial pressure O₂  = 1.78 atm

Explanation:

We can apply the mole fraction to solve the question:

Moles of gas / Total moles = Partial pressure of gas / Total pressure

Total moles = 1 H₂ + 2.5 He + 2O₂ = 4.5 moles

2 mol O₂ / 4.5 mol = Partial pressure O₂ / 4 atm

(2 mol O₂ / 4.5 mol ) . 4 atm = Partial pressure O₂  → 1.78 atm

7 0
3 years ago
Read 2 more answers
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