The answer would be 8 just took the test
Answer:- C. Hafnium.
Solution:- Mass of the sample is 46.0 g and it's volume is
.
From mass and volume, we can calculate it's density using the formula:



On the basis of the density, this substance could either be mercury or hafnium. Since the substance is a solid at room temperature where as mercury is liquid. So, it can't be mercury.
The right choice is C) Hafnium.
Answer:
Let me know what is your questions!!
The answer is Mole, but send me a message if you need the equation for how to get it
True because hydrogen ions combines with h2o to make hydronium ion, so in a sense h2o is acting like a base.