Sulfur react with fluorine according to the equation: S (s) + F2 (g)  SF6 (g)

1. Balance the equation

2. Calculate the quantity of matter of SF6 obtained when 5g of sulfur react with fluorine

3. Deduce the mass of the obtained product

M(S) = 32 g. mol-1

; M(F)= 19 g. mol-1

Exercise 2:

The thermic decomposition of potassium chlorate (KClO3

) is a method used at laboratory to produce oxygen (O2

) and produce potassium

chloride (KCl).

1. Write the balanced equation of the reaction

2. Calculate :

3.1. The molar mass of KClO3

3.2. The number of moles of oxygen gaz produced during the decomposition of

0,5mol de KClO3

(s)

3.3. The mass of potassium chloride obtained from 30,6 g KClO3 solid

M(K)= 39 g. mol-1

; M(Cl)= 35 g. mol-1

; M(O)= 16 g. mol-1​

Activity two: just lemons, inc. production here's a one-batch sample of just lemons lemonade production. determine the percent yield and amount of leftover ingredients for lemonade production and place your answers in the data chart. hint: complete stoichiometry calculations for each ingredient to determine the theoretical yield. complete a limiting reactant-to-excess reactant calculation for both excess ingredients. water sugar lemon juice lemonade percent yield leftover ingredients 946.36 g 196.86 g 193.37 g 2050.25 g 89% just lemons lemonade recipe equation: 2 water + sugar + lemon juice = 4 lemonade mole conversion factors: 1 mole of water = 1 cup = 236.59 g 1 mole of sugar = 1 cup = 225 g 1 mole of lemon juice = 1 cup = 257.83 g 1 mole of lemonade = 1 cup = 719.42 g show your calculations below. analysis questions 1. based on taste observations only, which ingredients were in excess in the lemonade samples in activity one? in activity one the excess substances for each sample were the water and sugar. 2. based on the data in activity two, which excess ingredients are affecting the taste of the lemonade in the sample batch? 3. what can just lemons, inc. do during production to reduce the amount of excess ingredients and improve the taste of their lemonade? 4. try to reduce the amount of leftover ingredients by changing the amount of one, two, or all three starting ingredients. show your stoichiometric calculations below. 5. during factory inspection, just lemons, inc. discovered that a water valve to the lemonade mixing station was not functioning. once they repair it, more water will enter the mixing station. from what you know about the limiting and excess ingredients for current lemonade production, what advice would you give engineers about the upcoming increase in water?

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

The minerals found in bones are deposited by living cells called