Answer: 1.5mol NH3
Explanation: 1N2+3H2= NH3
0.5 mol N2x 3NH3/1molN2= 0.5x3= 1.5mol NH3
The third element in group nine is: I<span>ridium</span>
Step 3
Explanation:
Step 3 contains a major error.
In step 3, it is stated as molten rocks are heated.
Molten rocks are not heated.
Solid rocks are heated as the plate is pushed down under the earth due to movement of tectonic plates.
When the rock is heated, the rock is melted to become molten.
- The molten rock is called magma.
- When the magma cools, it solidifies to form igneous rocks.
A molten rock is not heated to form igneous rocks.
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Volcanic eruptions brainly.com/question/5055821
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Answer:
Number of molecules = 23.9 × 10²³ molecules
Number of moles = 3.97 mol
Explanation:
Mass of HNO₃ = 250 g
Number of moles = ?
Number of molecules = ?
Solution:
Number of moles = mass / molar mass
Number of moles = 250 g/63 g/mol
Number of moles = 3.97 mol
Number of molecules:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
For 250 g of HNO₃:
250 g/ 63 g/mol = 3.97 mole
3.97 × 6.022 × 10²³ molecules = 23.9 × 10²³ molecules
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