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vlabodo [156]
3 years ago
8

What is common about the elements of a period? Select all that apply. They have the same number of electron energy levels. They

have similar chemical characteristics. They have similar physical characteristics. They transition from a metal to noble gas.
Chemistry
1 answer:
Ann [662]3 years ago
4 0

Answer:

They have the same number of electron energy levels.

They transition from a metal to noble gas.

Explanation:

Periods in the periodic table of elements refer to elements in the same row. All the elements in a certain row of the periodic table;

have the same number of electron energy levels.

transition from a metal to noble gas.

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If 9.5 × 10²⁵ molecules of CO₂ are produced in a combustion reaction, what is the mass in kg of CO₂ that is produced?
Leno4ka [110]

Answer:

6.9428 kg of CO2

Explanation:

1) Use Avogadro's number that states 1 mole = 6.022 x 10^23 particles. Convert 9.5 x 10^25 molecules into moles.

9.5 x 10^25 CO2 moleculesx\frac{1 mole CO2}{6.022 x 10^23} = 157.75 moles CO2

2) Convert 157.75 moles of CO2 into grams. CO2's molar mass is 44.01g.

157.75moles CO2 x \frac{44.01g/mol}{1 mole CO2} = 6942.79g

3) Convert 6942.79 grams into kilograms (divide by 1000):

6.9428 kg

4 0
3 years ago
Dosage calculation order: 3 mg available: 2 mg per 6 ml how many ml will be given?
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3 0
1 year ago
(b) Why is nitrogen used for storage of semen<br>in artificial insemination?​
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3 years ago
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(the heat bomb calorimeter gained)=(the heat material A gave)
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7 0
3 years ago
How many unpaired electrons would you expect on iron in [fe(h2o6] 3+?
MrMuchimi
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6 0
3 years ago
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