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algol [13]
3 years ago
10

PLEASE HELP ASAP I'LL GIVE BRAINLIEST: What would be the correct electron dot structure for silicon?

Chemistry
1 answer:
Vinvika [58]3 years ago
7 0
The second is the correct answer ^.^.
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Joe is given a 118 g sample of an impure aqueous solution. The solution does not conduct electricity so he assumes the impurity
DochEvi [55]

Answer: 186 g/mol

Explanation:

Weight of solvent (water)=100 g = 0.1 kg      (1 kg=1000 g)

Molar mass of solute (impurity) = ?

Mass of solute (impurity) added = mass of solution - mass of solvent (water) = (118- 100) = 18 g

\Delta T_f=K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}

\Delta T_f = change in freezing point

K_f = freezing point constant for water = 1.86^0C/m

\Delta T_f=T_f^0-T_f=(0-(1.80))^0C=1.80^0C

1.80=1.86\times frac{18}{M\times 0.1}

M=186g/mol

The molecular mass of the impurity is 186 g/mol.

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3 years ago
What is the molar mass of Ni(SiO3)3
Vsevolod [243]
The molar mass is 286.94 g/mol
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What are elements in the tall columns of the periodic table called?
mihalych1998 [28]
They are called representative elements. 
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How many molecules of water are in 3.8 moles of water?
Salsk061 [2.6K]

Answer:

2.29*10^24 molecules of water

Explanation:

1 molof water =6.022*10^23 molecules of water

therefore

molecules of water = 3.8*6.022*10^23

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Which compound has both ionic and covenant bonds
Mashutka [201]

Answer:

Calcium carbonate is another example of a compound with both ionic and covalent bonds.

Explanation:

In chemistry, an ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions.

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