Answer:
10
Explanation:
Deca or deka is a decimal unit prefix in the metric system denoting a factor of ten. For example, DECAGON is a 10-sided polygon (10-gon).
Answer:
Mass of NaBr produced = 23.67 g
Explanation:
Given data:
Mass of AgBr = 42.7 g
Mass of NaBr produced = ?
Solution:
Chemical equation:
2Na₂S₂O₃ + AgBr → NaBr + Na₃(Ag(S₂O₃)₂
Number of moles of AgBr:
Number of moles = mass/molar mass
Number of moles = 42.7 g/ 187.7 g/mol
Number of moles = 0.23 mol
now we will compare the moles of AgBr with NaBr.
AgBr : NaBr
1 : 1
0.23 : 0.23
Mass of NaBr:
Mass = number of moles × molar mass
Mass = 0.23 mol × 102.89 g/mol
Mass = 23.67 g
It is an example of physical change. The molecules are not changing, so it is not chemical, and a physical property is something that a physical thing has.
Answer:
<u>3.39 grams </u>of AgNo3 are required to make 25 ml of .80M solution
Explanation:
Molarity , M = 0.80
Volume = 25 ml
V = 0.025 L
Here n = number of moles
n = 0.02 mole
Molar mass of AgNO3 = 169.87 g/mol
Mass = 3.397 g
