Answer:
2.18x10^-9 M
Explanation:
From the question given,
Hydrogen ion concentration, [H+] = 4.59x10^-6 M
Hydroxide ion, [OH-] =?
The hydroxide ion concentration, [OH-] in the solution can be obtained as follow:
[H+] x [OH-] = 1x10^-14
4.59x10^-6 x [OH-] = 1x10^-14
Divide both side by 4.59x10^-6
[OH-] = 1x10^-14 / 4.59x10^-6
[OH-] = 2.18x10^-9 M
Answer:
Hope the above picture might help you :)
2.5 X 10²⁴ atoms of copper is equivalent to 266.7g of Cu.
HOW TO CALCULATE MASS:
- The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass. That is;
- mass of substance (g) = no. of moles (mol) × molar mass (g/mol)
- However, the number of moles of copper must first be calculated by dividing the number of atoms by Avogadro's number as follows:
- no. of moles of Cu = 2.5 X 10²⁴ ÷ 6.02 × 10²³
- no. of moles = 2.5/6.02 × 10²⁴-²³
- no. of moles = 0.42 × 10¹
- no. of moles = 4.2moles of copper.
- Molar mass of copper = 63.5g/mol
- Mass of copper = 4.2mol × 63.5g/mol
Therefore, 2.5 X 10²⁴ atoms of copper is equivalent to 266.7g of Cu.
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<h2>Answer:</h2>
The elements that can form basic compounds are;
- Rubidium
- Arsenic
- Silicon
- Antimony
Rubidium, Arsenic, Silicon, Antimony are the substances that can for the basic compounds. I think sulfur also play its role somehow in formation of basic compounds.
