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Brrunno [24]
3 years ago
9

What is the atomic number of an element that has 43 protons and 50 neutrons?

Chemistry
1 answer:
zimovet [89]3 years ago
8 0
The atomic number is based on the number of protons, so the atomic number would be 43
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PLS heLPPP. IM DYINGG
Shkiper50 [21]

Answer:

exothermic

Explanation:

This chemical reaction is an exothermic reaction because heat is liberated into the environment.

In organic chemistry, the reaction is termed a combustion reaction. In such a reaction, a fuel combines with oxygen to produce carbon dioxide and water.

It is an energy transformation from chemical energy to heat energy.

  • An exothermic reaction is one in which heat is liberated to the surrounding.
  • The surrounding becomes hotter at the end of the reaction.

In the reaction depicted, heat is liberated.

4 0
3 years ago
How much energy has your body used, in joules, if your health
Verdich [7]

Answer:

  1. 1,882.8 joules
  2. 83.652 calories

Explanation:

Given:

Amount in calories = 450 calories

Amount in joules = 3.5 × 100 joules

Find:

  1. Change in joules
  2. Change in calories

Computation:

We know that,

1 calories = 4.184 joules

So,

Amount in calories = 450 calories

= 450 × 4.184

= 1,882.8 joules

Amount in joules = 3.5 × 100 joules

=  [3.5 × 100] / 4.184

= 83.652 calories

8 0
3 years ago
How many moles of gas are in a 30 liter scuba canister if the temperature
In-s [12.5K]

Answer: the answer is n= 0.487 mol

Explanation: i took the test and got it right

7 0
3 years ago
What mass, in grams, of bromine gas (Br2) is contained in a 15.7-liter tank at 24.6 degrees Celsius and 0.986 atmospheres? Show
Nezavi [6.7K]

PV = nRT

P is pressure, V is volume, n is number of moles, R is the gas constant, T is temperature in K

(2.85 atm)(12.5 L) = (n)(.08206)(27 C + 273)

n = 1.45 moles x 35.45 grams / mol Cl2 = 51.3 grams

4 0
3 years ago
Read 2 more answers
What might cause the percent yield of sodium chloride to be less than 100%? How about when it is more than 100%?
blagie [28]

The cause the percent yield of sodium chloride to be less than 100% is that there are less solute particles of Sodium chloride present in the solution. When it is more than 100%, the solute particles are more than the solvent particles in the solution.

6 0
3 years ago
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