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3 years ago

How many hydrogen atoms are present in .46 moles of NH3

Chemistry

1 answer:

mixas84 [53]3 years ago

3 0

Answer:

2.78 x 10²³

Explanation:

1 mole contains 6.02 x 10²³ hydrogen atoms => 0.46 mole contains 0.46(6.02 x 10²³) hydrogen atoms or 2.78 x 10²³ atoms.

Caution => When to use H vs H₂ => This problem is specific for 'hydrogen atoms' but some may simply say hydrogen. In such cases use H₂ or 'molecular hydrogen' is the focus. it's a matter of semantics, H vs H₂.

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The process of change in a population over time is called what?

guapka [62]

Answer:

Microevolution

8 0

3 years ago

Gaseous methane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . What is the theoretical yie

maks197457 [2]

Answer:

The theoretical yield of carbon dioxide formed from the reaction of methane and oxygen gas is 1 mol.

Explanation:

The equation below shows the reaction of combustion of methane:

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

When no reactants are wasted and the reaction is complete, 1 mol of gaseous CO₂ will be produced. This means that the theoretical yield of carbon dioxide is 1 mol.

4 0

3 years ago

Read 2 more answers

Answer the questions about the following reaction.

Tomtit [17]

Answer:

1) 1.807 * 10^24 molecules of O2

2) 6 oxygen atoms required

3) There are 2 moles of Al2O3 formed

4) Mole ratio Al to oxygen = 2/3 = 0.6667

Explanation:

Step 1: The balanced equation

4Al(s) + 302(g) → 2Al203 (s)

We see that we need to consume 4 moles of Aluminium and 3 moles of oxygen to produce 2 moles of Al2O3

How many molecules of O2 are used in the reaction?

we have 3 moles of 02

The number of molecules of 02 in the reaction = 3 moles * 6.022 *10^23 = 1.807 * 10^24 molecules of O2

How many oxygen atoms are required?

Since we have 3 moles of 02 this means there is 3*2 = 6 oxygen atoms required

How many moles of Al2O3 are formed?

There are 2 moles of Al2O3 formed

What is the mole ratio of Al to O?

In the reactant side 4 Al reacts with six oxygen atoms to for two molecules of Al2O3

Mole ratio Al to oxygen = (No of atoms of Al in Al2O3)/ (Number of atoms of oxygen in Al2O3)

Mole ratio Al to oxygen = 2/3 = 0.6667

6 0

3 years ago

Read 2 more answers

In response to Boyle’s Law, the pressure of a gas increases as the volume decreases because

kondaur [170]

Answer:

the gas particles strike the walls of the container more often

Explanation:

Following Boyle's law, if the amount of gas and the temperature remain constant, the product of the pressure for the volume remains constant, but when altering any of these conditions this value changes and is expressed through the equation:

$P_{1} V_{1} = P_{2}V_{2}$

So, when the volume decreases, the distance that the particles have to travel is smaller and therefore more collisions between particles and between the walls occur per unit of time, that is, the system pressure increases.

7 0

3 years ago

What are the boiling point and freezing point of a 0.40 m solution of sucrose in ethanol?

dimulka [17.4K]

The solution would be like this for this specific problem:

For freezing point

Tf, soln= -114.6-(i*Kf*m)
Tf, soln= -114.6 - (1*1.99*0.40)
Tf= -115.4 C

For boiling point:

Tb=78.4+(i*Kf*m)

Tb=78.4+(1*1.99*.40)
Tb= 79.2 C

So the boiling and freezing point of a 0.40m solution of sucrose in ethanol is 79.2 C and -115.4 C respectively.

4 0

3 years ago