Marble is an acid reducer. "Tums" is usually made of powdered marble. Also, marble is very soft and translucent, making it easy to carve into sculptures.
Mixing red and green marbles is a physical change because the marbles retain their original properties and can be separated back into red and green marbles. The act of mixing does not alter the chemical composition of the marbles, making it a reversible physical change.
He will have 13 blue marbles and 10 green marbles.
10 Green marbles, 13 Blue marbles.
A bag of multicolored marbles would be considered a heterogeneous mixture because the marbles are physically distinct from one another and can be easily separated. Each marble maintains its individual properties and does not combine chemically with the others in the bag.
He has 10 green marbles.
There could be 12 white marbles and 16 red marbles
at least 39 blue marbles
8:6
12 blue marbles
12 blue marbles
24 red marbles
If there are 20 red marbles and 40 blue marbles, the ratio of red to blue is 1 over 2. The number of white marbles does not matter.