the answer is by adding the vectors.
i (J)hope this helps
The river current is moving with velocity vc=10 km/h in a certain direction relative to the shore. The boat is moving with velocity vb=10 km/h relative to the current, and in the same direction as the current, so the total velocity of the boat relative to the shore will be equal to the sum of the two vectors (because they are in the same direction):
v=vb+Vc = 10 km/h + 10 km/h = 20 km/h
First convert mass to number of moles. Molar mass
of H2C2O2 • 2H2O = 94 / mol
1.89g / (94 g / mol) = .02 mol H2C2O2 • 2H2O
Then we divide by 0.1 L, or 100 mL, and we get a
concentration of 0.2 M.
Since there are two positive ions (2 H+), therefore
normality is:
<span>0.4 N</span>
Answer:
a. H
b. H
c. N
d. N
Explanation:
a. Human error - It should be their responsibility to calibrate the balance
b. Human error - they should've known to put the right amount of sig figs.
c. Nonhuman error - they can't control the temperature
d. Nonhuman error - the balance must've been broken, therefore not a human error