Answer:
See explaination
Explanation:
Go to the attached file for the detailed and step by step solution of the given.
Answer:
its 1 not negative
the atom shown below was hydrogen, known as H.
Answer:
21 g/mL
Explanation:
To solve this problem, first look at the density equation, which is D=M/V, which D stands for density, M stands for mass, and V stands for volume. When you substitute in the variables, you get D=17.5/.82, which is equivalent to 21.34. However, since we need to pay attention to the sig fig rules for multiplying, we need to have the same amount of sig figs as the value with the least amount of sig figs, which is the number .82. .82 has two sig figs, so you round down. Your answer will be 21 g/mL.
A physical change.
Physical change = can be reverted + doesn't change substance
Chemical = changes substance
