3 years ago

How many naturally occurring elements are present on the product table?

Chemistry

1 answer:

algol [13]3 years ago

6 0

The first 92 elements of the periodic table are naturally occurring elements.

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True or false

Ivanshal [37]

Answer:

true because of the elements

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3 years ago

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N76 [4]

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3 years ago

What is the atomic number for neon?

Anna35 [415]

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3 years ago

Two moles of magnesium (Mg) and five moles of oxygen (O2) are placed in a reaction vessel. When magnesium is ignited, it reacts

SOVA2 [1]

Answer:

$\boxed{\text{Mg is the limiting reactant}}$

Explanation:

We are given the amounts of two reactants, so this is a limiting reactant problem.

We know that we will need moles, so, lets assemble the data in one place.

2Mg + O₂ ⟶ 2MgO

n/mol: 2 5

Calculate the moles of MgO we can obtain from each reactant.

From Mg:

The molar ratio of MgO:Mg is 2:2

$\text{Moles of MgO} = \text{2 mol Mg} \times \dfrac{\text{2 mol MgO}}{\text{2 mol Mg}} = \text{2 mol MgO}$

From O₂:

The molar ratio of MgO:O₂ is 2:1.

$\text{Moles of MgO} = \text{5 mol O}_{2} \times \dfrac{\text{2 mol MgO}}{\text{1 mol O}_{2}} = \text{10 mol MgO}\\\\\boxed{\textbf{Mg is the limiting reactant}} \text{ because it gives the smaller amount of MgO}$

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3 years ago

Why is much of the ocean floor so difficult to see?

nlexa [21]

Answer:

because ocean currents deposit sediment on the ocean floor.

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