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Musya8 [376]
3 years ago
11

Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown.

Chemistry
1 answer:
vovikov84 [41]3 years ago
6 0

The Correct option is B. 102 kJ/mol , Endothermic

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Is smoke a element, compound , heterogenous mixture or a solution??
Anna71 [15]
Heterogeneous mixture
6 0
3 years ago
Read 2 more answers
What kind of waves can travel through a vacuum?
enyata [817]

Answer:

electromagnetic wave

Explanation:

Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate.

8 0
3 years ago
Calculate the number of milliliters of 0.753 M KOH required to precipitate all of the Pb2+ ions in 135 mL of 0.775 M Pb(NO3)2 so
MrRa [10]

Answer:

278 ml of KOH.

Explanation:

The equation for the reaction is: Pb(NO3)2(aq) + 2KOH(aq) --> Pb(OH)2(s) + 2KNO3(aq)

Pb(NO3)2:

Half ionic equation:

Pb(NO3)2(aq) --> Pb2+ + 2NO3^-

Pb(OH)2 --> Pb2+ + 2OH-

Volume = 135 mL

Molar concentration = 0.775 M

Number of moles = molar concentration * volume

= 0.775 * 0.135

= 0.105 mol of Pb(NO3)2

Since 1 mole of Pb(NO3)2 reacted with 2 moles of KOH to give 1 mole of Pb2+ (Pb(OH)2).

By stoichiometry,

Number of moles of KOH = 0.105 * 2

= 0.21 mol

Molar concentration = number of moles/volume

Volume = 0.21/0.753

= 0.278 l

To ml, 0.278 l * 1000 ml/1l

= 278 ml of KOH.

3 0
3 years ago
Which coefficient should appear in front of LiNO3 in the balanced equation?
ikadub [295]
Missing chemical reaction:
Pb(NO₃)₂(aq) + Li₂SO₄(aq) → PbSO₄(s) + LiNO₃(aq).
Answer is:
Balanced chemical reaction:
Pb(NO₃)₂(aq) + Li₂SO₄(aq) → PbSO₄(s) + 2LiNO₃(aq).
Number of atoms on both side of chemical reaction must be the same. There is two lithium atoms, two nitrogs, ten oxygen atoms, one lead and one sulfur on both side of balanced chemical reaction.
4 0
4 years ago
What must happen in order for atoms to bond either lonically or covalently with one another?
irga5000 [103]

Answer:

Explanation:

In ionic bonding, atoms transfer electrons to each other. Ionic bonds require at least one electron donor and one electron acceptor. In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.

8 0
2 years ago
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