Posted by **Linda** on Tuesday, March 18, 2014 at 11:02pm.

220 J to kilojoules

350 kj to calories

97.0 kcal to joules

35.0 cal to kilocalories

How do I convert them?

- Chemistry -
**DrBob222**, Tuesday, March 18, 2014 at 11:22pm
1000 J = 1 kJ is the factor so

220 J x (1 kJ/1000 J) = ?

You see you multiply the value you start with by the factor. You can place the factor as 1000/1 or as 1/1000. Only one way is right. The right way will ALWAYS cancel the unit you don't want and keep the unit you want. For example, you see J in the numerator cancels J in the denominator and kJ in the numerator (the unit you want to keep) stays.

Next is 350 kJ to cal.

1000J = 1 kJ and

4.184 J = 1 cal. Here there are two factors but they work the same way even in long lines of factors from one unit to the next.

350 kJ x (1000 J/1 kJ) x (1 cal/4.184 J) = ? cal

You see the first kJ in the numerator cancels with the first kJ in the denominator of the first factor. That factor converts kJ to J. The J in the first factor in the numerator cancels with J in the denominator of the second factor. That factor converts J to cal which is what you want.

For the others:

1000 cal = 1 kcal

1 cal = 4.184 J

1000 cal = 1 kcal.

## Answer this Question

## Related Questions

- Chemistry - Running at a rate of 6 mi/h uses 704 Calories in an hour. Convert ...
- Chem - How do you convert? (a) 4.50 Cal to calories (b) 600.0 Cal to kilojoules...
- chemistry - how do I convert kcal/mol to kJ/mol? how do I convert cal/mol to kJ/...
- chemistry - Can somebody please help me with this question? That'd be great. ...
- Chemistry - is this right when a fuel is burned some of its chemical potential ...
- chemistry - how do you convert joules to kilojoules? example: 2240.48 joules ...
- chemistry - convert the know heat of fusion of water,334j/g to these units. the ...
- Chemistry - Suppose you use 135 calories of energy to perform a task, how many ...
- Chemistry - A fast food item contains 544 nutritional calories. Convert this ...
- AP Chemistry - Convert 8.3×10^5 cal to kiloJoules