Answer:
B
Explanation:
first find the no. Of moles of H2SO4
= 75/98.1
= 0.7645
Next step
In on mole of H2SO4 the no.of oxygen atom is 4.
1 H2SO4 : 4 O
0.7645 : x x= 0.7645x4= 3.0581
next multiply avogadros constant
3.0581 x 6.022× 10^23 =1.84x10^24
Explanation:
true true true true true true
Answer:
D) Cool air is warming quickly.
Explanation:
d is the answer.
Answer and Explanation:
The bond that holds together the two amino acids is a peptide bond, or a covalent chemical bond between two compounds (in this case, two amino acids). It occurs when the carboxylic group of one molecule reacts with the amino group of the other molecule, linking the two molecules and releasing a water molecule.
Answer:
Answers are given below.
Explanation:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1) 0.680 moles of H₂S
0.680 mol × 6.022 × 10²³ molecules / 1mol
4.09× 10²³ molecules
2) 8.96 moles of KI
8.96 mol × 6.022 × 10²³ molecules / 1mol
53.96 × 10²³ molecules
3) 6.500 moles of KClO
6.500 mol × 6.022 × 10²³ molecules / 1mol
39.143 × 10²³ molecules
4) 0.950 moles of NaOH
0.950 mol × 6.022 × 10²³ molecules / 1mol
5.721 × 10²³ molecules
5) 4.73 moles of Na₂CO₃
4.73 mol × 6.022 × 10²³ molecules / 1mol
28.48 × 10²³ molecules
