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Inga [223]
3 years ago
8

What is the atomic number of an ion with 5 protons, 6 neutrons, and a change of 3

Chemistry
1 answer:
miskamm [114]3 years ago
8 0

The atomic number is the number of protons in an element or the number of electrons in an element.

Atomic number=number of protons=number of electrons

<span>Atomic number=atomic mass - number of neutrons</span>

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What type of energy travels in the form of electromagnetic waves?
almond37 [142]
Light/thermal. Charges move back and forth which move at the speed of light
3 0
3 years ago
25 g of a compound is added to 500 mL of water if the freezing point of the resulting solution is
vlabodo [156]

Answer:

a)   119 g/mol

Explanation:

-We apply the formula for freezing point depression to obtain the molality of the solution:

\bigtriangleup T_f=K_fm, \  \ K_f=1.36\textdegree C/m\\\\\therefore m=\frac{\bigtriangleup T_f}{K_f}\\\\=\frac{0.57\textdegree C}{1.36\textdegree C}\\\\=0.4191\ mol/Kg\\\\

#We use the molality above to calculate the molar mass:

m=\frac{0.4191\ mol}{1\ Kg}=\frac{25\ g}{0.5\ Kg}\\\\\therefore 1 \ mol=\frac{25\ g}{0.5\ Kg}\times\frac{1\ Kg}{ 0.4191}\\\\=119.3033\approx 119\ g/mol

Hence, the molar mass of the compound is 119 g/mol

5 0
3 years ago
Which of the following describes the characteristics of a plasma?
Scorpion4ik [409]

There are essentially 5 states of matter-

1) Solid

2) Liquid

3) Gas

4) Plasma

5) Bose-Einstein Condensate

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Ans B)

7 0
2 years ago
How many milliliters of ammonium sulfate solution having a concentration of 0.218 M are needed to react completely with 62.6 ml
BartSMP [9]

Answer:

330 mL of (NH₄)₂SO₄ are needed

Explanation:

First of all, we determine the reaction:

(NH₄)₂SO₄  +  2NaOH →  2NH₃  +  2H₂O  +  Na₂SO₄

We determine the moles of base:

(First, we convert the volume from mL to L) → 62.6 mL . 1L/1000 mL = 0.0626L

Molarity . volume (L) = 2.31 mol/L . 0.0626 L = 0.144 moles

Ratio is 2:1. Therefore we make a rule of three:

2 moles of hydroxide react with 1 mol of sulfate

Then, 0.144 moles of NaOH must react with (0.144 .1) /2 = 0.072 moles

If we want to determine the volume → Moles / Molarity

0.072 mol / 0.218 mol/L = 0.330 L

We convert from L to mL → 0.330L . 1000 mL/1L = 330 mL

6 0
2 years ago
If element X has 83 protons, how many electrons does it have? ______ electrons
Zolol [24]
The element has 83 electrons
5 0
3 years ago
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