3 years ago

Why do you think the experimenter conducted this experiment in a lab rather than in the natural world, where this

1 answer:

6 0

Answer: The experimenter conducted this experiment in allowed to control the conditions and limit the number of variables

Explanation:

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If 10.0g of oxygen reacts with 10.0g of hydrogen, how many grams of water can be

rusak2 [61]

Answer:

the answer is 90g

Explanation:

2g of H2 produce 18g of H2O/10.0g of H2 to produce x the answer is 90g

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3 years ago

In a ________ change, such as a change of state, the substance as a whole changes, but its underlying structure remain the same.

pav-90 [236]

Answer:

Im pretty sure it is chemical change

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3 years ago

A manganese electrode was oxidized electrically. If the mass of the electrode decreased by 225 mg during the passage of 1580 cou

qwelly [4]

Answer:

<u>Oxidation state of Mn = +4</u>

Explanation:

Atomic mass of Mn = 55g/mol

From Faraday's law of electrolysis,

Electrochemical equivalent = $\frac{mass}{charge}$

i.e Z = $\frac{m}{Q}$ = $\frac{0.225g}{1580C}$ = 0.0001424 g/C

But Equivalent weight, E = atomic mass ÷ valency = Z × 96,485

⇒ $\frac{55}{valency}$ = 0.0001424 × 96,485

<u>∴ Valency of Mn = +4</u>

8 0

3 years ago

Comparing Mirrors

mote1985 [20]

Answer:

convex

concave

plane

Explanation:

4 0

4 years ago

Read 2 more answers

The question is below

rodikova [14]

The anode is the electrode where the oxidation occurs.

Cathode is the electrode where the reducction occurs.

Equations:

Mn(2+) + 2e- ---> Mn(s) Eo = - 1.18 V
2Fe(3+) + 2e- ----> 2 Fe(2+) 2Eo = + 1.54 V

The electrons flow from the electrode with the lower Eo to the electrode with the higher Eo yielding to a positive voltage.

Eo = 1.54 V - (- 1.18) = 1.54 + 1.18 = 2.72

Answer: 2.72 V

3 0

3 years ago