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Artemon [7]
3 years ago
5

How many protons does this atom have?:____

Chemistry
2 answers:
lorasvet [3.4K]3 years ago
7 0

QUESTION:-

How many protons does this atom have?:____

How many neutrons does this atom have?:____

How many electrons does this atom have?:____

ANSWER:-

CIRCLE WITH +VE CHARGE :- PROTONS = 6

CIRCLE WITH NO CHARGE:- NEUTRON = 8

CIRCLE WITH -VE CHARGE:- ELECTRONS = 6

Allisa [31]3 years ago
4 0

Answer:

1.6

2.8

3.6

Explanation:

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A 72.0 mL aliquot of a 1.40 M solution is diluted to a total volume of 248 mL. A 124 mL portion of that solution is diluted by a
Aliun [14]

Answer: 0.20 M

Explanation:

According to the dilution law,

M_1V_1=M_2V_2

where,

M_1 = molarity of stock solution = 1.40 M

V_1 = volume of stock solution = 72.0 ml

M_2 = molarity of diluted solution = m

V_2 = volume of diluted solution = 248 ml

1.40\times 72.0=m\times 248

m=0.41M

Now 124 mL portion of this prepared solution is diluted by adding 133 mL of water.

According to the dilution law,

M_1V_1=M_2V_2

where,

M_1 = molarity of stock solution = 0.41 M

V_1 = volume of stock solution = 124 ml

M_2 = molarity of diluted solution = m

V_2 = volume of diluted solution = (124 +133) ml = 257 ml

0.41\times 124=m\times 257

m=0.20M

Thus the final concentration of the solution is 0.20 M.

8 0
3 years ago
Mg + 2 AgNO₃ → Mg(NO₃)₂ + 2 Ag How many grams of magnesium nitrate, Mg(NO₃)₂, are formed when 9.87 moles of silver nitrate, AgNO
Aleksandr-060686 [28]

Mass of Magnesium nitrate formed : 731.86 g

<h3>Further explanation</h3>

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

Mg + 2AgNO₃ → Mg(NO₃)₂ + 2 Ag

moles of silver nitrate, AgNO₃ = 9.87

mole ratio AgNO₃ : Mg(NO₃)₂ = 2 : 1, so mol Mg(NO₃)₂ :

\tt \dfrac{1}{2}\times 9.87=4.935

mass of Mg(NO₃)₂(MW=148,3 g/mol) :

\tt mass=mol\times MW\\\\mass=4.935\times 148,3\\\\mass=731.86~g

4 0
3 years ago
When a substance dissociates into OH- ions, they are classified as ________ ?
djyliett [7]
When a substance dissociates into OH- ions, they are classified as bases.
4 0
3 years ago
QUESTION 3
ddd [48]

Answer:

Different visible waves show different colors

5 0
3 years ago
Match the special cases of each gas law with its description. A law may be used more than once. In the equations, K is a constan
Reptile [31]

Answer:

A - P1V1 = P2 V2

B - V/T = K

B - V1 / T1 = V2 / T2

C - V = kn

A - PV = k

D - P total = P1 + P2 + P3 + .

Explanation:

8 0
3 years ago
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