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An experiment requires 0.52 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(

Bingel [31]

Answer: 0.52 L of 15 M $NH_3(aq)$ will be used to prepare this amount of 0.52 M base.

Explanation:

But on diluting the number of moles remain same and thus we can use molarity equation.

$C_1V_1(stock)=C_2V_2$ (to be prepared)

where,

$C_1$ =concentration of stock solution = 15 M

$V_1$ = volume of stock solution = ?

$C_2$ = concentration of solution to be prepared = 0.52 M

$V_2$ = volume of solution to be prepared = 15 L

$15\times V_1=0.52\times 15$

$V_1=0.52L$

Thus 0.52 L of 15 M $NH_3(aq)$ will be used to prepare this amount of 0.52 M base

8 0

3 years ago

How are organisms classified as Eukarya different from organisms classified as Archaea and Bacteria?

inn [45]

Answer: D

Explanation: The Eukarya differ from the Archea and Bacteria in that their cells are eukaryotic, meaning they contain a membrane enclosed nucleus and other membrane enclosed organelles.

6 0

3 years ago

Read 2 more answers

a radioisotope has a half life of three hours how much of a 120g sample remains after 9 hours. what will the g amount be after 3

aksik [14]

$\huge\boxed{♔︎Answer♔︎}$

60g after 3 hours, 30g after 6 hours and 15g after 9 hours

Explanation:

Weight of the radioactive sample = 120g

half life time period = 3 hours

(a) The weight of sample after 3 hours

$\textsf{ No. of half lives} = \sf \cancel\frac{3}{3} = 1$

The fraction of sample left

$\sf { \frac{1}{2} }^{1} = \frac{1}{2}$

Mass of the sample left

$\sf \frac{1}{2} \times 120 = \cancel\frac{120}{2} = 60g$

60g of sample is left after 3 hours

(b) The weight of sample after 6 hours

$\textsf{ No. of half lives} = \sf \cancel\frac{6}{3} = 2$

The fraction of the sample left

$\sf { \frac{1}{2} }^{2} = \frac{1}{2} \times \frac{1}{2} = \frac{1}{4}$

Mass of the sample left

$\sf \frac{1}{4} \times 120 = \cancel\frac{120}{4} = 30g$

30g of sample is left after 6 hours

(c) The weight of sample after 9 hours

$\textsf {No. of half lives} = \sf \cancel\frac{9}{3} = 3$

The fraction of sample left

$\sf { \frac{1}{2} }^{3} = \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} = \frac{1}{8}$

Mass of sample left

$\sf \frac{1}{8} \times 120 = \cancel \frac{120}{8} = 15g$

15g of sample is left after 9 hours.

3 0

2 years ago

What is the frequency of radiation which has a wavelength of 7.00 x 10⁻⁵cm? In what region of the electromagnetic spectrum is th

Novosadov [1.4K]

Answer:Frequency (hz) is some sort of vibration occurs during a particular period of time as either in a sound waves or in an electromagnetic field. Given below an online frequency of light with wavelength calculator to convert from wavelength to hz. Wavelength (λ) is the distance between two waves of energy traveling from one point to another point.

Explanation:

6 0

3 years ago

How do I do lewis dot structures with multiple elements

Nutka1998 [239]

Answer:

5:59

Dot structures II: Multiple bonds (video)

Explanation:

try this video! hope it helps!

8 0

3 years ago