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3 years ago

Help me please I really need it

Chemistry

1 answer:

Kitty [74]3 years ago

8 0

<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>

a) Magnesium, 2.8.2, Group number 2,Metals, They are not non metals.

b) Fluorine, 2.2.5, Group number7, Metal No, Non-Metal yes

c) Carbon, 2,2,2. Group number 4, Metal No, Non-Metal yes

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2>

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A brick has a mass of 100 G and a volume of 25CM3 what is the density of the brick

kumpel [21]

Answer:

$\boxed {\boxed {\sf 4 \ g/cm^3}}$

Explanation:

We are asked to find the density of a brick. Density is a substance's mass per unit volume. The formula for calculating density is as follows.

$\rho= \frac{m}{v}$

The mass of the brick is 100 grams and the volume is 25 cubic centimeters.

m= 100 g
v= 25 cm³

Substitute the values into the formula.

$\rho= \frac{ 100 \ g}{25 \ cm^3}$

Divide.

$\rho=4 \ g/cm^3$

The density of the brick is <u>4 grams per cubic centimeter.</u>

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3 years ago

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3 years ago

A 242 kg motorcycle moves with a velocity of 8 m/s. What is its kinetic energy? 7744 Joules IS this right?

Sergeeva-Olga [200]

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m= 242 kg
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4 years ago

How many moles of iron (Fe) will be produced from 6.20 moles of carbon monoxide (CO)

anzhelika [568]

Answer:

4.13 moles of Fe will be produced in the reaction

Explanation:

To produce Fe from CO, we need to react Fe₂O₃ and the carbon monoxide.

The reaction is:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

1 mol of iron (III) oxide react to 3 moles of carbon monoxide in order to produce 2 moles of Iron and 3 moles of carbon dioxide.

We assume, the Fe₂O₃ in excess, so we propose this rule of three

3 moles of CO can produce 2 moles of Fe

Therefore 6.20 moles of CO will produce (6.20 . 2)/3 = 4.13 moles of Fe

4 0

3 years ago

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What is the solubility of the diazonium salt

NARA [144]

Answer:

Diazonium salts are salts formed from aromatic primary amines by diazotization. Diazonium salts are not very stable but very reactive. It therefore serves as a starting material for the preparation of various derivatives of arenes, azo dyes and pharmaceuticals.

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4 years ago

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Help me please I really need it ​

Help me please I really need it