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4 years ago

Why do most mass numbers on the periodic table have a decimal?

Chemistry

1 answer:

Westkost [7]4 years ago

3 0

Answer:

cause they big

Explanation:

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What is lever (Question answer)

aliina [53]

A lever is a machine made of fulcrum and rigid beam. Force is added to either side of them beam.

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3 years ago

Read 2 more answers

Perform the following conversions:

jek_recluse [69]

Answer :

The conversion used for the temperature from Fahrenheit to degree Celsius is:

$^oC=\frac{5}{9}\times (^oF-32)$

The conversion used for the temperature from degree Celsius to Kelvin is:

$K=^oC+273$

(a) $1.06^oF$

$^oC=\frac{5}{9}\times (^oF-32)$

$^oC=\frac{5}{9}\times (1.06^oF-32)$

$^oC=-17.188$

The temperature in degree Celsius is, $-17.188^oC$

$K=^oC+273$

$K=-17.188+273$

$K=255.812$

The temperature in Kelvin is, 255.812 K

(b) $3410^oC$

$^oC=\frac{5}{9}\times (^oF-32)$

$3410^oC=\frac{5}{9}\times (^oF-32)$

$^oF=6106$

The temperature in degree Fahrenheit is, $6106^oF$

$K=^oC+273$

$K=3410+273$

$K=3683$

The temperature in Kelvin is, 3683 K

(c) $6.1\times 10^3K$

$K=^oC+273$

$6.1\times 10^3K=^oC+273$

$^oC=5827$

The temperature in degree Celsius is, $5827^oC$

$^oC=\frac{5}{9}\times (^oF-32)$

$5827^oC=\frac{5}{9}\times (^oF-32)$

$^oF=10456.6$

The temperature in degree Fahrenheit is, $10456.6^oF$

8 0

3 years ago

The Battle of Gettysburg proved to be the turning point of the war. true or false

xxTIMURxx [149]

The Battle of Gettysburg proved to be the turning point of the war.

TRUE

6 0

3 years ago

Sugar can be removed from a sugar water solution through dialysis.

Fantom [35]

Answer:

false

which I think

I am not sure

4 0

3 years ago

calculate the amount of heat energy required to evaporate 25.7g of water at 100 degrees celcius. (Molar heat of vaporization of

Vikentia [17]

Answer:

5.82 ×10⁴ j

Explanation:

Given data:

Mass of water = 25.7 g

Amount of heat to evaporate it = ?

Molar heat of vaporization = 4.07×10⁴ j/mol

Solution:

First of all we will calculate the number of moles of water.

Number of moles = mass/ molar mass

Number of moles = 25.7 g/ 18 g/mol

Number of moles = 1.43 mol

Energy needed for one mole is 4.07×10⁴ j.

For 1.43 mol:

1.43 mol × 4.07×10⁴ j/ 1mol

5.82 ×10⁴ j

8 0

4 years ago