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Maher
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1 vote
2 answers
4k views

Why does HCO₂⁻ exhibit delocalized bonding while CO₂ does not?

1 vote
4 answers
45k views

How to figure out which phase on a phase diagram will be the most dense?

5 votes
2 answers
36k views

How can I find the heat that will be released in kJ per gram for the reaction of Al with Fe2O3?

5 votes
2 answers
6k views

Is viscosity proportional to the number of hydroxyl groups?

0 votes
2 answers
35k views

The relationships between n , T , P , V for a gas?

4 votes
2 answers
2k views

How to calculate the partial pressure of oxygen in this mixture of oxygen and argon?

2 votes
1 answer
183 views

A 1.00 L gas at 100 °C and 500 Torr contains 70.0 % He and 30.0 % Ne by mass. What is the partial pressure of He?

6 votes
6 answers
32k views

What is the proper Lewis structure for HCOOH?

4 votes
1 answer
2k views

Determine the ΔH for the reaction in kJ/mol of ethanol?

1 vote
2 answers
58k views

without using electronegativity, which one of these molecules is polar? [closed]

0 votes
2 answers
5k views

Calculate the second ionization energy for the Mg from the following data?

0 votes
1 answer
3k views

How to identify ions by their quantum number?

3 votes
1 answer
7k views

How to determine the specific heat of methanol from calorimeter data?

2 votes
1 answer
26k views

What total energy (in kJ) is contained in 1.0 mol of photons, all with a frequency of 2.75 • 10¹⁴ Hz?

1 vote
1 answer
2k views

Determine the concentration of the original NaOH solution

2 votes
1 answer
3k views

What is the formula of potassium ammonium sulfate?

1 vote
1 answer
2k views

A sample of copper(II) sulfate pentahydrate (CuSO4·5H2O) contains 0.360 g of water. What is the total number of atoms in the compound

0 votes
1 answer
812 views

what's the ratio of atoms of these two isotopes?

1 vote
1 answer
667 views

Use the given information to write the formula of this compound

0 votes
1 answer
9k views

what's the mass of the original sample (g)?