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dem82 [27]
2 years ago
15

What is the molecular formula for water?

Chemistry
2 answers:
Alexxandr [17]2 years ago
5 0

Answer:

H2O

Explanation:

There are 2 hydrogen atoms and 1 oxygen atom

Katena32 [7]2 years ago
5 0

Answer:

H2O

Explanation:

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A metal (M) forms an oxide with the formula MO. If the oxide contains 7.17 % O by mass, what is the identity of the metal?
Nataly_w [17]

The metal is lead, Pb.

One unit of the oxide contains one atom of O (16.00 u).

∴ Mass of oxide = 16.00 u O × (100 u MO/7.17 u O) = 223.15 u MO

Mass of M = mass of MO – mass of O = 223.15 u -16.00 u = 207.2 u

The only element with an atomic mass of 207.2 u is lead (Pb) and the formula of the oxide is PbO.

7 0
3 years ago
The difference between paper chromatography and thin layer chromatography is that
Lera25 [3.4K]

The basic difference between thin layer chromatography (TLC) and paper chromatography (PC) is that, while the stationary phase in PC is paper, the stationary phase in TLC is a thin layer of an inert substance supported on a flat, unreactive surface. ... Paper chromatography is performed using paper.

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3 years ago
The. bond dissociation enthalpies of the H-H bond and the H-Cl bond are 435 kJ mol^-1 and 431 kJ mol^-1, respectively. The ΔHfO
Novay_Z [31]

The bond dissociation energy of the Cl - Cl bond is -958 kJ mol^-1.

<h3>What is the dissociation enthalpy?</h3>

Given that;

H-H bond energy =  435 kJ mol^-1

H-Cl bond energy = 431 kJ mol^-1

ΔHfO of HCL(g) = -92kJ mol^-1

Bond dissociation enthalpy of the Cl-Cl bond = x

-92 = 435  +  431 + x

x = -92 - (435  +  431)

x = -958 kJ mol^-1

Learn More about dissociation enthalpy:brainly.com/question/9998007?

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6 0
2 years ago
What is the source of energy for an earthquake
MA_775_DIABLO [31]
Seismic waves is the energy of and earthquake aka Elastic Energy
3 0
3 years ago
Read 2 more answers
What is the mass of an object that requires a force of 25 N to accelerate at 5 m/s/s?
AfilCa [17]
The mass is 6 Kilograms

Explanation:

Force
=
mass
⋅
acceleration

30
=
m
⋅
5

m
=
6
K
g
The mass is 6 Kilograms
8 0
3 years ago
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