Acertain chemical reaction releases 16.8/kjg of heat for each gram of reactant consumed. how can you calculate what mass of reactant will produce 800.j of heat? set the math up. but don't do any of it. just leave your answer as a math expression

Mass of reactant that will produce 800 joules can be calculated using ;

Given that :

I gram of reactant produces  16.8 Kilojoules of heat

Express The formula to determine the mass that produces 800 joules of heat

1 gram = 16.8 Kj

x gram = 800 joules

∴ The mass of reactant that will produce 800 joules ( x gram )

= Heat produced by the unknown mass * ( 1kj / 1000j ) / conversion rate

= ( 800 joules ) * ( 1 kilojoules / 1000 joules) / ( 16.8 kilojoules / grams)

Note : ( 1kj / 1000j ) = conversion factor

Hence we can conclude that Mass of reactant that will produce 800 joules can be calculated using ;  ( 800 joules ) * ( 1 kilojoules / 1000 joules) / ( 16.8 kilojoules / grams).

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i just got this problem. it's 90.3

it's c. elements are placed in rows based on how may valencies electrons have.