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dem82 [27]
3 years ago
10

ANSWER ASAPP WILL MARK BRAINLIST Describe in 3 sentences each type of matter

Chemistry
1 answer:
Vinvika [58]3 years ago
6 0

Answer:

electrons are i the electron cloud and have a - charge.

neutrons are in the nucleus and have no charge.

protons have a + charge and is also in the nucleus

Explanation:

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When magnesium burns in air, it combines with oxygen to form magnesium oxide according to the following equation. What mass in g
Kisachek [45]

Answer: The given quantity is 2 moles of magnesium or 48 g of magnesium.

The unknown quantity is mass of MgO in grams.

Molar mass of MgO = 40 g

Explanation: 2Mg+O_2\rightarrow 2MgO

As can be seen from the chemical equation, 2 moles of magnesium react with 1 mole of oxygen gas to give 2 moles of MgO.

According to mole concept, 1 mole of every substance weighs equal to its molar mass.

Thus 2\times 24= 48 g of magnesium produce=2\times 40= 80 g of MgO.

Molar mass is the mass in grams of 1 mole of the substance.

Thus if 2 moles of MgO weigh= 80 g

1 mole of MgO will weigh=\frac{80}{2}\times 1 =40g

Thus molar mass of MgO is 40 g.

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