Read the list of substances. spoon, styrofoam cup, scissors, pencil which substances are likely to float in water?

Explanation:

Density is defined as the mass present in a unit volume of a substance.

Mathematically,       Density =

Since, density is proportional to mass. So, more is the mass of an object more will be its density and vice-versa.

It is known that density of water is 1 g/ml. And any substance that has more density than water will sink into water when added to it. Whereas a substance that has less density than water will float in water when added to it.

Out of the given options density of a styrofoam cup is the least.

Hence, we can conclude that styrofoam cup is likely to float in water.

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles