Which are steps in the formation of hail pellets? check all that apply.

they are tossed up and down in clouds.
they gain layers of ice and grow larger.
they grow to less than 5 mm in diameter.
they grow too heavy and fall to the ground.
they form ice crystals directly from water vapor.

moles fe2o3 = 16.5 /159.691 g/mol=0.103 moles fe = 0.103 x 2 = 0.206 mass fe = 0.206 x 55.847 g/mol=11.5 g

there are four f atoms on the products side.

since two more f atoms are required on the reactant side, you multiply the number of f2 molecules by two.

so 2 should be placed in front of f2

answer:

a) 2mg + ticl₄ ⟶ 2mgcl₂ + ti

b) 1.02 kg

step-by-step explanation:

a) balanced equation

we know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.  

m_r:     24.30                                 47.87

            2mg + ticl₄ ⟶ 2mgcl₂ + ti

m/kg:                                               1.00

b) mass of mg

(i) calculate the moles of ti

n = 1.00 kg ti   × (1 kmol ti /47.87 kg ti)

  = 0.020 89 kmol ti

(ii) calculate the moles of mg

the molar ratio is (2 kmol mg/1 kmol ti)

n = 0.020 89 kmol ti × (2 kmol mg/1 kmol ti)

  = 0.041 78 kmol mg

(iii) calculate the mass of mg

m = 0.041 78 kmol mg × (24.30 kg mg/1 kmol mg)

    = 1.02 kg mg

you need 1.02 kg mg to produce 1.00 kg ti.

heat = m deltah

m = 150.0 g

deltah= 1.38 kj/gram

heat = 150*1.38

heat = 207 kj         answer