Answer:
Explanation:
Let us define oxidation and reduction.
Oxidation and reduction deal with the transferring of electrons between reactants. The reactant that loses electrons is oxidized, while the reactant that gains electrons is reduced.
Answer:
9.72 × 10^20 molecules
<h3>
Explanation:</h3>
We are given;
- The mass of the compound C16H18N2O4S as 540 mg
- Molar mass of C16H18N2O4S = 334.4 g/mol
We are required to determine the number of molecules in 540 mg of penicillin.
- We know that 1 mole of a compound contains molecules equivalent to the Avogadro's number.
- That is, 1 mole of a compound = 6.022 × 10^23 molecules
- Therefore, 1 mole of C16H18N2O4S = 6.022 × 10^23 molecules
But, 1 mole = 334.4 g
Thus, 334.4 g of C16H18N2O4S contains 6.022 × 10^23 molecules
Mass of C16H18N2O4S = 540 mg or 0.54 g
Molecules in 0.54 g will be;
= (0.54 g ÷ 334.4 g) × 6.022 × 10^23 molecules
= 9.72 × 10^20 molecules
Answer:
[H3O+] = 1.0*10^-12 M
[OH-] = 0.01 M
Explanation:
We can use the following equation to find the hydronium ion concentration. Plug in the pH and solve for H3O+.
pH = -log[H3O+]
<u>[H3O+] = 1.0*10^-12 M</u>
Now, to find the hydroxide ion concentration we will use the two following equations.
14 = pH + pOH
pOH = -log[OH-]
14 = 12 + pOH
pOH = 2
2 = -log[OH-]
<u>[OH-] = 0.01 M</u>
Significant figures means the number of important figures, 0 not included.
This means that the answer is 1094.00
Hope this helps! :)
When something radiates, it sends out waves or rays. ... If your house has a radiator, that might help you remember this word, because the radiator radiates warmth. Radiating is a concept that applies to anything that emits rays or waves. People camping make a fire so it can radiate light and heat.