100 points - - chemistry

question 1:
ion charges: (na^+, cu^2+, oh^-,
write a balanced chemical equation for the change you observed in the laboratory

note that the reaction in this experiment is:
copper (ii) nitrate + sodium hydroxide → copper (ii) hydroxide +sodium nitrate

question 2:
ion charges: (na^+, fe^2+, oh^-, so4^2-)
write a balanced chemical equation for the change you observed in the laboratory

note that the reaction in this experiment is:
iron (ii) sulfate + sodium hydroxide → iron (ii) hydroxide + sodium sulfate

question 3:
ion charges: (na^+, fe^3+, oh^-, no3^-)
write a balanced chemical equation for the change you observed in the laboratory

note that the reaction in this experiment is;
iron (iii) nitrate + sodium hydroxide → iron (iii) hydroxide + sodium nitrate
how many grams of sodium nitrate formed when 1.5 moles of iron (iii) nitrate reacted with excess of sodium hydroxide? note: use a periodic table, write units for your result and show your work ☺

Explanation:

1. Cu(NO3)2 + 2NaOH → Cu(OH)2 + 2NaNO3

2. FeSO4 + 2 NaOH = Fe(OH)2 + Na2SO4

3. Fe(NO3)3 + 3 NaOH = Fe(OH)3 + 3 NaNO3

For the second part of 3 since it tells us NaOH is excess we dont care about it. We use our balanced equation 3 to get the correct molar ratios to solve this.

1.5mol Fe(NO3)3 x 3mol NaNO3/1mol Fe(NO3)3 x 84.99gNaNO3/1molNaNO3

= 382.455g NaNO3

is has three carbons, so the answer is propylamine.

meth-

eth-

prop-

but-

pent-

hex-

hept-

oct-

non-

explanation:

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied