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3 years ago

CARDS

Chemistry

1 answer:

Contact [7]3 years ago

8 0

Answer:

The sun is very important, but its rays can also be harmful.

Explanation:

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Equivalent mass of AL2O3

Maru [420]

Answer:

$Mass = 102g$

Explanation:

Given

Compound: $Al_2O_3$

Required

Determine the equivalent mass

In the above compound, we have: 2 Al and 3 (O)

The atomic mass of Aluminium is:

$Al = 27$

The atomic mass of Oxygen is:

$(O) = 16$

So, the equivalent mass is:

$Mass = 2 * 27 + 3 * 16$

$Mass = 54 + 48$

$Mass = 102g$

5 0

3 years ago

I need help on this may u help me?

sergij07 [2.7K]

Answer:

just go to googel and it will tell you

Explanation:

7 0

3 years ago

What was the ERA?

BabaBlast [244]

The answer is: C. A failed constitutional amendment.

The Equal Rights Amendment (ERA) is a proposed amendment to the United States Constitution.

This amedment is designed to guarantee equal legal rights for all American citizens regardless of sex.

Hawaii was the first state to ratify ERA, followed by approximately 30 other states.

During the mid-1970s, a conservative women in opposition eroded support for the Equal Rights Amendment and amadment failed to achieve ratification.

7 0

4 years ago

Read 2 more answers

A concentration cell is constructed using two Ni electrodes with Ni2+ concentrations of 1.0 M and 1.00 � 10�4 M in the two half-

Komok [63]

Answer: The cell potential of the cell is +0.118 V

Explanation:

The half reactions for the cell is:

Oxidation half reaction (anode): $Ni(s)\rightarrow Ni^{2+}+2e^-$

Reduction half reaction (cathode): $Ni^{2+}+2e^-\rightarrow Ni(s)$

In this case, the cathode and anode both are same. So, $E^o_{cell}$ will be equal to zero.

To calculate cell potential of the cell, we use the equation given by Nernst, which is:

$E_{cell}=E^o_{cell}-\frac{0.0592}{n}\log \frac{[Ni^{2+}_{diluted}]}{[Ni^{2+}_{concentrated}]}$

where,

n = number of electrons in oxidation-reduction reaction = 2

$E_{cell}$ = ?

$[Ni^{2+}_{diluted}]$ = $1.00\times 10^{-4}M$

$[Ni^{2+}_{concentrated}]$ = 1.0 M

Putting values in above equation, we get:

$E_{cell}=0-\frac{0.0592}{2}\log \frac{1.00\times 10^{-4}M}{1.0M}$

$E_{cell}=0.118V$

Hence, the cell potential of the cell is +0.118 V

5 0

3 years ago

Water and salt are compounds made of the combination of more than

Nikolay [14]

This is false

Because they are compounds, they cannot be pure substances.

Because:Compounds are pure substance

3 0

3 years ago