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irinina [24]
3 years ago
14

if an atom has two additional valence electrons than the original element has, what would be the charge of the atom

Chemistry
1 answer:
salantis [7]3 years ago
4 0
Answer: 2-

Each electron has a 1- charge, so two additional electrons would add a 2- charge to the previously neutral atom.
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Name the following compounds:
timama [110]
A) sodium fluoride
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How much heat is required to raise the<br> temperature of 835g of water from 35.0°C to<br> 65.0°C?
Anna007 [38]

Answer:

25,050 calories.

Explanation:

A calorie is the amount of energy needed to raise the temperature of one gram of water 1 degree centigrade. If we are raising 835 grams of water 30 degrees then we multiply 835*30 to get 25,050 calories.

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What element in the fourth period is an exception to the Aufbau principle? a. Li c. Ca b. Cr d. Br
gulaghasi [49]

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4 0
4 years ago
How many moles of helium is required to blow up a balloon to 87.1 liters at 74 C and 3.5 atm?
marshall27 [118]

Moles of helium is required to blow up a balloon to 87.1 liters at 74 C and 3.5 atm is  021.65 mole

Mole is the unit of amount of substances of specified elementary entities

According to the ideal gas law he number of moles of a gas n can be calculated knowing the partial pressure of a gas p in a container with a volume V at an absolute temperature T from the equation

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Here given data is volume = 87.1 liters

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Pressure = 3.5 atm

R = 0.0821

Putting this value in ideal gas equation then

n =pV/RT

n =  3.5 atm×87.1 liters / 0.0821 ×347.15 k

n = 021.65 mole

Moles of helium is required to blow up a balloon to 87.1 liters at 74 C and 3.5 atm is  021.65 mole

Know more about mole of helium

brainly.com/question/23365554

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Which source of energy causes most of the water evaporation on Earth’s surface?
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The answer is A. Wind
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3 years ago
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