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4 years ago

What is true of neutrons?

1 answer:

7 0

Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.

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A Beer's Law Plot of sample A gives a slope equal to 1.2 M-1cm-1. Calculate molar concentration of this sample at a wavelength o

Rashid [163]

Answer:

$0.192\ \text{M}$

Explanation:

A = Absorbance of solution

E = Molar absorptivity

l = Length of cuvette = 1 cm

c = Concentration of solution

Beer's law is given by

$A=Elc$

The equation of a straight line is given by

$y=mx+c$

Comparing the above equations we get

Value on $y$ axis = A = Absorbance of solution = 0.23

$m$ = Slope of line = El = Molar absorptivity multiplied with length = $1.2\times 1\ \text{M}^{-1}$

$x$ = Value of x axis = c = Concentration of solution

So we get

$c=\dfrac{A}{El}\\\Rightarrow c=\dfrac{0.23}{1.2\times 1}\\\Rightarrow c=0.192\ \text{M}$

The molar concentration of the sample is $0.192\ \text{M}$

5 0

3 years ago

You have a solution of koolaid, and when you add more sugar to it, it dissolves fairly easily. What type of solution was the ori

Amanda [17]

Answer:

Flavored Sugar

Explanation:

8 0

4 years ago

The identity of an element depends on the number of protons and neutrons in the nucleus. protons in the atom. neutrons in the at

labwork [276]

Answer:

protons in the atom.

Explanation:

The identity of an element relies on the number of protons in its atom. This is called the atomic number. The atomic number is the basis of the periodic table of elements. Modern periodic law states that "the properties of elements are a periodic function of their atomic number".

Atomic number of atoms do not change and they are convieniently used in identifying an atom.

8 0

3 years ago

Near a volcano you would find?

Genrish500 [490]

Answer: Could you be more specific?

5 0

3 years ago

What is the mass of 3.2 moles of Sulfur?

FinnZ [79.3K]

Answer:

820.864 g

Explanation:

1) The atomic mass of sulfur (found from the periodic table) is 32.065 amu. Use this mass to find the molar mass of Sulfur. Sulfur is S8 so the molar mass of sulfur is:

8 × 32.065 = 256.52 g/mol

2) To find the mass use the formula:

m = n × M where m is the mass, n is the number of moles, and M is the molar mass.

$m \: = 3.2 \times 256.52$

$m = 820.864 \: g$

8 0

3 years ago