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Ket [755]
3 years ago
12

Water can only dissolve inorganic compounds

Chemistry
1 answer:
mote1985 [20]3 years ago
4 0
Water can only dissolve inorganic compounds is false 


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How much energy is evolved during the formation of 98.7 g of Fe, according to the reaction below? Fe2O3(s) + 2 Al(s) → Al2O3(s)
gtnhenbr [62]

Answer:

-753kJ of energy are involved

Explanation:

Based on the reaction:

Fe₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Fe(s) ΔH°rxn = -852 kJ

<em>When 2 moles of Fe are produced, there are released -852kJ.</em>

<em />

98.7g of Fe are:

98.7g Fe × (1mol / 55.845g) = 1.767 moles of Fe

If 2 moles of Fe are producen when -852 kJ of energy are involved, 1.767 moles of Fe envolved:

1.767mol × (-852kJ / 2mol Fe) = <em>-753kJ of energy are involved</em>

6 0
3 years ago
Tính nộng độ mol/l của các chất tan trong các dung dịch sau: a) Trong 100ml dung dịch (A) có chứa 0,0365g HCl. (Cho: H=1; Cl=35,
makkiz [27]

Explanation:

2 Because visual specialization skills are important to success in so many career

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8 0
3 years ago
The reaction described in part a required 3.35 l of calcium chloride. what is the concentration of this calcium chloride solutio
kupik [55]
Assuming you are talking about the atomic mass of calcium chloride...
M = n/V
M = 1/3.35
M = 0.298
5 0
3 years ago
How many equivalents are present in 13.5g of Al3+
gogolik [260]
Answer:

= 1.5 eq

Explanation:

One definition of an equivalent weight is that it is mass of a substance that gains or loses 1 mole of electrons.
Al3+ has lost 3 e-, so there are 3 equivalent weights in 1 mol Al3+.

1 mol Al3+ =3 eq. wts.
1 mol Al x(27 g / 1 mol)x(1 mol / 3 eq. wts.) = 9.0 g = 1 eq. wts.

13.5 g Al3 + x (1 eq.wt. / 9.0 g) = 1.5 eq
4 0
3 years ago
The variable n represents
Vika [28.1K]
C is the correct answer
8 0
3 years ago
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