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masha68 [24]
2 years ago
6

Penny has a pencil that is 19 cm long. How long the pencil In inches

Chemistry
2 answers:
JulijaS [17]2 years ago
8 0
You divide 19 centimeters by 2.54 making 19 centimeters equivalent to 7.48 inches
marysya [2.9K]2 years ago
3 0

Answer : The length of pencil in inches are 7.48 inches.

Explanation :

The conversion used form centimeter to inch is :

1in=2.54cm

As we are given that the length of the pencil is 19 cm. Now we have to determine the length of the pencil in inches.

As, 2.54 centimeter length of pencil = 1 inch

So, 19 centimeter length of pencil = \frac{19cm}{2.54cm}\times 1inch=7.48inches

Therefore, the length of pencil in inches are 7.48 inches.

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Draw a schematic of the hydrogen atom with the single proton in the nucleus, and the n=1, n=2, n=3, and n=4 energy level options
max2010maxim [7]

Explanation:

According to Bohr's postulates, the electron in the present in the lower energy level can absorb energy and exits to higher energy level. Also, when this electron returns back to its orbit, it emits some energy.

Since the hydrogen consists of 1 electron and 1 proton. The lowest energy configuration of the hydrogen is when n =1 or, when the electron is present in the K-shell or the ground state.

The possible transition for the electron given in the question is :

n = 2, 3 and 4

The schematic diagram of the hydrogen atom consisting of these four quantum levels in which the electron can jump (Absorption) and comeback to from these energy levels (emission) .

3 0
3 years ago
How many moles in 2.33E25 molecules of NO?
Sindrei [870]

Answer:

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6 0
3 years ago
How many grams are in 1.6 moles of potassium bromide?​
slava [35]

Answer:

190.4g

Explanation:

1.6mol of KBr (119.002g KBr/1 mol) = 190.4g

since you want to find grams, take the molar mass of KBr (119.002) per 1 mol and use it as your conversion factor (119.002g KBr/1 mol) which will then cancel out mols and leave you with grams.

6 0
3 years ago
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Elanso [62]

Answer:

Hi!!!

Explanation:

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5 0
2 years ago
What is the molarity of a KF(aq) solution containing 3.0 mol of KF in 2.00L of solution?
sergeinik [125]

Answer : The molarity of KF in the solution is 1.5 M.

Explanation : Given,

Moles of KF = 3.0 mol

Volume of solution = 2.00 L

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Moles of }KF}{\text{Volume of solution (in L)}}

Now put all the given values in this formula, we get:

\text{Molarity}=\frac{3.0mol}{2.00L}=1.5mole/L=1.5M

Therefore, the molarity of KF in the solution is 1.5 M.

4 0
3 years ago
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