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Doss [256]
3 years ago
7

How many moles of Cl- ions are needed to completely combine with 0.25 moles of Mg+2 ions?

Chemistry
1 answer:
Mnenie [13.5K]3 years ago
4 0
<span>The number of moles of Cl- ions needed to combine completely with 0.25 mole of Mg+2 ions is:
0.50.</span>
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A flask is filled with 50.0 ml of 0.15 M HCl acid. Exactly 0.054 grams of CaCo3 are placed in the acid,
ira [324]

Answer:

See explanation

Explanation:

2HCl(aq) + CaCO3(aq) ------->CaCl2(aq) + CO2(g) + H2O(l)

Number of moles of acid present = 50/1000 * 0.15 = 0.0075 moles

Number of moles of calcium carbonate = 0.054g/100 g/mol = 0.00054 moles

2 moles of HCl reacts with 1 mole of calcium carbonate

x moles of HCl reacts with 0.00054 moles of calcium carbonate

x = 2 *  0.00054/1

x = 0.00108 moles of HCl

Amount of acid left = 0.0075 moles - 0.0075 moles = 0.00642 moles

Reaction of HCl and NaOH

HCl(aq) + NaOH(aq) ------> NaCl(aq) + H2O(l)

Since the reaction is in the mole ratio of 1:1

0.00642 moles of HCl is neutralized by 0.00642 moles of NaOH

8 0
3 years ago
Because amines are basic, they can often accept a proton. draw the protonated structure of n-propylamine
Valentin [98]
Answer is: CH₃-CH₂-CH₂-NH₃⁺.
Amine group (-NH₂) has neutral charge, bet when accepts one proton (H⁺) has positive charge.
Amines<span> are </span>compounds<span> that contain a </span>basic nitrogen atom<span> with a </span>lone pair of electrons<span>. Amines are </span>derivatives<span> of </span>ammonia<span>, where is one or more </span>hydrogen<span> atoms replaced by a </span>substituent<span> such as an </span>alkyl<span> or </span>aryl<span> group (in this compound propyl group).</span>
3 0
3 years ago
An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. What are its atomic number, atomic mass, and net charge?
kirill [66]
The answer to ur question corresponds to the information u provided in option A.
please mark  me brainiest on this and thank me 
6 0
4 years ago
Read 2 more answers
Dinitrogentetraoxide partially decomposes into nitrogen dioxide. A 1.00-L flask is charged with 0.0400 mol of N2O4. At equilibri
artcher [175]

Answer:

Keq=0.866

Explanation:

Hello,

In this case, the undergone chemical reaction is:

N_2O_42NO_2

In such a way, since 0.0055 mol of N₂O₄ remains in the flask, one infers that the reacted amount (x) was:

x=0.04mol-0.0055mol=0.0345mol

In addition, the produced amount of NO₂ is:

2*0.0345mol=0.069mol

Finally, considering the flask's volume, the equilibrium constant is then computed as follows:

Keq=\frac{(2*0.0345M)^2}{0.0055M}=0.866

Best regards.

6 0
3 years ago
If kc = 0.143 at 25°c for this reaction, predict the direction in which the system will shift if the initial concentrations of c
GenaCL600 [577]
The equation is as follows:
Cyclohexane (C6H12) ⇔ Methyl cyclopentane (C6H12)
The equilibrium constant Kc = 0.143 >>> (1)
Qc is the reaction quotient 
where; If Q = K >>>> No shift left or right >>> (2)
Q > K >>>> Reaction shifts left >>> (3)
Q < K >>>> Reaction shifts right >>> (4) 
And in our equation; Q = 0.3 / 0.4 = 0.75 >>> (5) 
From (1), (3) and (5), Q > Kc 
∴ the reaction shifts left

3 0
3 years ago
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