Esteban finds that a small bar of pure gold, with a density of 19.3 g/cm³, displaces 80 cm³ of water. he calculates that it's mass is 1,544 g. he then calculates that a smalller bar, with half the volume of the first bar, has a mass half a great. is he correct? explain your reasoning.

Answer : Yes, he is correct.

Solution : Given,

Density of pure gold =

The pure gold displaces of water that means the Volume of pure gold is equal to the volume of water displaces.

Volume of pure gold =

Now we have to calculate the Mass of pure gold.

Formula used :      

By rearranging the formula, we get the mass of pure gold.

So, The mass of pure gold is 1544 g.

Now we have to calculate the Mass of pure gold when the volume become half.

The density of pure gold remains same because density is an intensive property which means that no matter how much of the substance is present, its value remains same.

Volume of pure gold =      

So, we conclude that when the volume become half then the mass also half.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

just did the assignment and the answer was #1 +2 n