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choli [55]
3 years ago
11

Elements symbol

Chemistry
1 answer:
Marat540 [252]3 years ago
8 0
1) H
2) He
3) Li
4) Be
5) B
6) C
7) N
8) O
9) F
10) Ne
11) Na
12) Mg
13) Al
14) Si
15) P
16) S
17) Cl
18) Ar
19) K
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Boron (B): 1sE2sF2pG E = F = G =
stellarik [79]

Answer:

E = 2

F = 2

G = 1

Explanation:

Just did edgenuity.

3 0
3 years ago
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On the first day of your new job as a chemist, you are given a bottle of magnesium sulfate and asked to make 30 mL of 0.3 M MgSO
Lady bird [3.3K]

Answer:

The answer to your question is 15500 mg of MgSO₄ 7H₂O

Explanation:

Data

Volume = 30 ml

Concentration = 0.3 M

Formula MgSO4∗7H2O

Process

1.- Calculate the number of moles needed

 Molarity = moles / volume

Solve for moles

 moles = Molarity x volume

Substitution

 moles = 0.3 x 0.03 l

 moles = 0.009 moles of MgSO₄

2.- Calculate the molecular mass of MgSO4∗7H2O

molecular mass = 24 + 32 + 64 + 14 + 112

                           = 246 g

3.- Get the proportion MgSO4 :7H2O, this proportion is 1 : 7

4.- Calculate the amount of MgSO4∗7H2O

    0.009 mol of MgSO4 \frac{7 MgSO4 7H2O}{1 mol MgSO4} \frac{246 g MgSO4 7H2O}{1 mol MgSO4 7H2O}

Simplification

   15.5 g = 15500 mg

5 0
3 years ago
31 Which ion has the smallest radius?<br> (1) O2-(2) S2-(3) Se2-<br> (4) Te2-
bearhunter [10]
The answer 1) Oxygen. And another smallest radius is fluorine, because it is the first in the periodic table.
6 0
3 years ago
Most elements are<br> O non metals<br> O metalloids<br> O metals<br> O gases
Aliun [14]
Metallioids
Explain
4 0
2 years ago
A second unknown substance has a density of 80 g/cm and a mass of 570g. What is the volume?
Salsk061 [2.6K]

Answer:

25 g

10 cm

3

=

2.5 g/cm

3

Explanation:

6 0
3 years ago
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