10 sweets have a mass of 50 g.

How many sweets will have mass of 1/2kg?

1/2 kg * 10sweets/50g * 1000g/1kg = 100 sweets

Or, you could just say that since 1/2 kg = 500g, that's 10 times 50g, so you get 10 times the sweets, or 10*10=100

To find out how many sweets will have a mass of 1/2 kg, we need to determine the mass of each sweet and then divide the total desired mass by the mass of each individual sweet.

Given that 10 sweets have a mass of 50 g, we can find the mass of each sweet by dividing the total mass (50 g) by the number of sweets (10).

Mass of each sweet = Total mass / Number of sweets
= 50 g / 10
= 5 g

Now, to find the number of sweets that will have a mass of 1/2 kg (0.5 kg), we need to convert the mass of each sweet into kg and then divide the total desired mass by the mass of each individual sweet.

0.5 kg = 500 g (since 1 kg = 1000 g)

Number of sweets = Total desired mass / Mass of each sweet
= 500 g / 5 g
= 100

Therefore, you would need 100 sweets to have a mass of 1/2 kg.