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3 years ago

12

Using the periodic table locate the element with the average atomic mass 87.62 which of the following is the chemical symbol for

the element

1 answer:

dalvyx [7]3 years ago

6 0

Answer:

Strontium (Sr)

Explanation:

Atomic number 38

Relative atomic mass 87.62

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Where are metals atoms located on the periodic table? where are non-metal atoms located on the periodic table?

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Metals atoms are located on group 1 & 2 while non- metals atom on group 4 to 8

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3 years ago

2.3 moles of CaBr2 contains how many molecules

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2 years ago

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4 years ago

How much heat must be removed from 357 g of water at 76.9C in order to cool it down to 18.1C?

Scrat [10]

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58.8C of heat

Explanation:

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3 years ago

A 5.00 liter gas sample is collected at a temperature and pressure of 27.0 degree C and 1.20 atm. It is desired to transfer the

kipiarov [429]

Answer:

The temperature of the gas in the 3.00 liter container, must be 150K

Explanation:

Let's apply the Ideal Gas Law, to find out the moles

P . V = n . R . T

1,20 atm . 5L = n . 0,082 L.atm/mol.K . 300 K

(1,20 atm . 5L) / (0,082 mol.K/L.atm . 300 K) = n

6/24,6 mol = n = 0,244 moles

We have the moles now, so let's find the temperature in our new conditions.

P . V = n . R . T

1 atm . 3L = 0,244 moles . 0,082 L.atm/mol.K . T° in K

(1 atm . 3L / 0,244 moles . 0,082 mol.K/L.atm) = T° in K

3/20,008 K = T° in K = 150K

3 0

3 years ago