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3 years ago

15

Consider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the periodic table. The atoms of which elem

ent require the least amount of energy to give up an electron when forming chemical bonds?

2 answers:

Allisa [31]3 years ago

5 0

Barium is the answer, hope it helps you :D

Ghella [55]3 years ago

4 0

Answer:

Explanation:Barium is the answer, hope it helps you :D

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A nickel compound has the formula Ni(NO3)2•xH,0 and a molar mass

Fofino [41]

<h2>Answer: x = 6</h2>

Explanation:

Molar mass of a compound is the sum of the molar mass of all the atoms of the compound.

⇒ Molar mass of the Nickel Compound (Hydrated Nickel (II) Nitrate)

= Molar mass (Ni+ 2N + 6O)+ x (2H+ O)

= [58.693 + 2(14.007) + 6(15.999)] + x [2(1.008) + 15.999] g/mol

= (182.701 + 18.015x) g/mol

Since the molar mass is known to be 290.7 g/mol

then 182.701 + 18.015x = 290.7

⇒ 18.015x = 290.7 - 182.701

x = (290.7 - 182.701) ÷ 18.015

∴ x = 6 [conventionally expressed as a whole number]

that makes the compound Nickel Nitrate Hexahydrate

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3 years ago

Which statement describes covalent bases?

noname [10]

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Paladinen [302]

Answer:

$Kp_2} =2.0$

Explanation:

$K_{p1}= 1.8$

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$\delta H$ = 0.64 kJ/mol = 640 J/mol

R = 8.314 J/mol.K

Using Van't Hoff Equation:

$In (\frac{Kp_2}{Kp_1} )=(-\frac{DH}{R} *(\frac{1}{T_2}-\frac{1}{T_1} )$

$In (\frac{Kp_2}{1.8} )=(-\frac{640}{8.314} *(\frac{1}{415}-\frac{1}{298} )$

$In (\frac{Kp_2}{1.8} )=0.072827$

$(\frac{Kp_2}{1.8} )= e^{0.0728727}$

$\frac{Kp_2}{1.8} =1.075593605$

$Kp_2} =1.075593605*1.8$

$Kp_2} =1.936068489$

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3 years ago

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3 years ago

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Which solution has the lowest freezing point?

Leokris [45]

<span>Correct Answer: Option 3 i.e. 30 g of KI dissolved in 100 g of water.

Reason:
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4 years ago

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