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wolverine [178]
3 years ago
6

How many neutrons are in cesium-135 (135/55Cs)

Chemistry
1 answer:
Alexxx [7]3 years ago
3 0
 there are 78 neutrons.

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In an chemicalbreaction involving Fe and S, it was found that 45.2 g of Fes was produced. If the percent yield of the reaction i
saw5 [17]

Answer:

47.8 g

Explanation:

Remember the equation for percent yield:

% yield = actual / theoretical

We're given two of the values in the question, so plug n' play:

0.945 = 45.2 / theoretical

theoretical = 47.8 g

Keep in mind you can use mass here without converting to moles because we're working with products only. If you were given a mass of reactants, you would need to convert to moles and using a balanced chemical equation find the corresponding moles of product produced.

7 0
3 years ago
Name two elements whose outer energy levels are complete with two electrons
cluponka [151]

Answer:

ppsuck

Explanation:

f;lhfadlkahglkaga

4 0
3 years ago
The proper answer gets marked brainiest, answer what the question is asking.
Keith_Richards [23]

A substance is an element if it consists of a single type of atom. A substance is a compound if it is made up of more than one element.

<h3>Elements and compounds</h3>

In chemistry, an element is defined as all pure substances consisting of the same atom. For example, magnesium and potassium metal are all elements because they consist of magnesium and potassium atoms only.

On the other hand, compounds are defined as substances consisting of 2 or more atoms of different elements. For example, sodium chloride consists of atoms of sodium and chlorine. Hence, it is considered to be a compound.

More on elements and compounds can be found here: brainly.com/question/13516179

#SPJ1

6 0
2 years ago
Recorded observations are called:
Lostsunrise [7]
Recorded observations is called data.
7 0
3 years ago
Read 2 more answers
Pls help :)
prisoha [69]

Answer:

0.484 mole

Explanation:

1 mole of glucose reacts with 6 moles of O2, producing :

6 moles of CO2

6 moles of H2O

678 kcal

Using rule of three you have:

1 mole of glucose -> 678 kcal

x mole of glucose -> 328 kcal

x = 328/678 * 1 =0.484 mole

6 0
3 years ago
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