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2 years ago

A 25 mL sample of 0.100 M HNO3 completely reacts with NaOH according to this equation:

Chemistry

1 answer:

Rama09 [41]2 years ago

7 0

Answer:

2.5x10^–3 mole.

Explanation:

Data obtained from the question include:

Volume of solution = 25mL

Molarity of HNO3 = 0.1M

Mole of HNO3 =..?

First, we'll begin by converting 25mL to L. This can be achieved by doing the following:

1000mL = 1L

Therefore, 25mL = 25/1000 = 0.025L

Now, we can obtain the number of mole of HNO3 present in the solution as follow:

Molarity = mole /Volume

Mole = Molarity x Volume

Mole = 0.1 x 0.025

Mole = 2.5x10^–3 mole.

Therefore, 2.5x10^–3 mole of HNO3 is present in the solution.

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How many xenon atoms are contained in 1.00 moles of xenon?

joja [24]

Answer:

6.022 x 10²³

Explanation:

The number of atoms = the number of moles x with the Avogadro's number.

(The Avogadro's number is 6.022 x 10²³ atoms / moles)

number of atoms = 1.00 moles x 6.022 x 10²³ atoms / mole

number of atoms = 6.022 x 10²³ atoms

(There is no need to simplify?) = 6.022 x 10²³

(ps. This is my first time doing this question so im sorry if i got it wrong

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1 year ago

What are 2 applications of the Colligative Property that allows freezing point depression?

butalik [34]

1) Adding salt on the roads in the winter time,
2) Adding salt to the ice bath when making ice cream.
3) Mixing 2 substances when making coolant for a car.

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3 years ago

What is the primary reason that atomic radius decreases as you move from left to right across the periodic table even through th

Anika [276]

Answer:

As you move across a period the electrons are being added to the same shell. But, protons are being added as well. This makes the nucleus more positively charged and, increasing protons has a greater effect than electrons. So, there is a greater nuclear attraction and, because the electrons are being added to the same shell that shell gets pulled in more. This causes a decrease in atomic radius.

Explanation:

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3 years ago

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n =

Lady bird [3.3K]

Answer:

$4.86\times10^{-7}\ \text{m}$

Explanation:

R = Rydberg constant = $1.09677583\times 10^7\ \text{m}^{-1}$

$n_1$ = Principal quantum number of an energy level = 2

$n_2$ = Principal quantum number of an energy level for the atomic electron transition = 4

Wavelength is given by the Rydberg formula

$\lambda^{-1}=R\left(\dfrac{1}{n_1^2}-\dfrac{1}{n_2^2}\right)\\\Rightarrow \lambda^{-1}=1.09677583\times 10^7\left(\dfrac{1}{2^2}-\dfrac{1}{4^2}\right)\\\Rightarrow \lambda=\left(1.09677583\times 10^7\left(\dfrac{1}{2^2}-\dfrac{1}{4^2}\right)\right)^{-1}\\\Rightarrow \lambda=4.86\times10^{-7}\ \text{m}$

The wavelength of the light emitted is $4.86\times10^{-7}\ \text{m}$ .

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2 years ago

The sodium atom loses an electron to form a sodium ion (Na+). Which statement is correct with respect to its atomic radius? A. T

maw [93]

Answer:B. The sodium ion has a smaller radius than the atom.

Explanation:

Because size of cation is less than neutral atom

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3 years ago