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noname [10]
2 years ago
12

A student was given a mixture of iron of iron fillings and sulphur. He was told to heat it and observe the compound.

Chemistry
1 answer:
Fynjy0 [20]2 years ago
3 0

Answer:

a) Black

b) Non-magnetic

c) No reaction with carbon disulphide.

d) i don't know sry

But i had to go through my 6th grade notes for this .____.

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Determine the molarity of the solution assuming the salt water solution has a density of 1.01 g/cm3.
Gnesinka [82]

Answer:

Explanation:

Molarity is number of moles÷ volume of the solution.

Density = mass÷ volume.

Moles is mass÷molar mass

Molar mass of Nacl is 58.44g/mol

Moles is 1/58.44=0.017moles.

0.017 moles divided by volume which is 1.

Molarity is 0.017 moles

Molarity is the number of moles of solutes divided by volume of the solution.

4 0
4 years ago
Given the reactions, X ( s ) + 1 2 O 2 ( g ) ⟶ XO ( s ) Δ H = − 607.3 kJ XCO 3 ( s ) ⟶ XO ( s ) + CO 2 ( g ) Δ H = + 356.9 kJ wh
tresset_1 [31]

Answer:

The answer to your question is ΔH = -964.2 kJ

Explanation:

Data

Reaction 1        X  +  12O₂  ⇒  XO            ΔH = -607.3 kJ

Reaction 2       XCO₃  ⇒  XO  +  CO₂      ΔH = 356.9 kJ

ΔH for  Reaction 3   X  +  12O₂ +  CO₂  ⇒  XCO₃

Process

1.- Write the Reaction 1 the same      

2.- Invert the order of reaction 2, and change the sign of the Enthalpy

Reaction 1        X  +  12O₂  ⇒  XO            ΔH = -607.3 kJ

Reaction 2       XO  +  CO₂ ⇒ XCO₃       ΔH = - 356.9 kJ

3.- Sum up the reactions

                       X + 12O₂ + XO + CO₂ ⇒  XO + XCO₃

4.- Simplify

                       X + 12O₂ + CO₂ ⇒  XCO₃  ΔH = -964.2 kJ

7 0
3 years ago
What are homogenous mixtures
svetoff [14.1K]

Answer:

a mixture in which the composition is uniform throughout the mixture.

Explanation:

7 0
3 years ago
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What are the forces plz help
Diano4ka-milaya [45]
The first 3 are pushes and the last one is a pull.

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