C I think not sure give it a try
Answer:
If someone is suffering from the problem of acidity after overeating Baking soda solution would be suggested as a remedy as it is basic in nature, it neutralises excess acid in the stomach.
Answer:
2.41x10²¹ atoms
Explanation:
First we <u>calculate the mass of nickel in the coin</u>, using <em>the given mass and percent composition</em>:
- 0.942 g * 25/100 = 0.2355 g Ni
Then we<u> convert 0.2355 grams of nickel to moles</u>, using its<em> molar mass</em>:
- 0.2355 g Ni ÷ 58.69 g/mol = 0.004 mol
Finally we <u>convert moles into number of atoms</u>, using <em>Avogadro's number</em>:
- 0.004 mol * 6.023x10²³ atoms/mol = 2.41x10²¹ atoms
The molarity of potassium ions in a 0.122 M K2CrO4 is 0.244 M
<u><em>Explanation</em></u>
write dissociation reaction for K2CrO4
that K2CrO4 (aq)→ 2K^+ (aq) + CrO4^2- (aq)
K2CrO4 dissociate to give 2 ions of potassium ,therefore the molarity of potassium ion = 2 x 0.122 = 0.244 M
