How many C-13 atoms are present, on average, in a 1.6000*104-atom sample of carbon?

15 grams of NaCl are added to a beaker. It is dissolved in 200 ml of water and diluted up to 250 ml. What is the Na + concentration in moles/liter in the final solution? (Atomic mass are Na = 22.99 g/mole, Cl=35.45 g/mol)

What is the effect of acid rain in delaware

Of element x has 22 protons, how many electrons does it have

What are the pros and cons of the banana with a vaccine embedded in its DNA?

Is concrete a homogenous or heterogenous mixture?

A student is planning an investigation of an acid-base reaction. Which of the following is not an accepted method of monitoring the progress of the neutralization reaction? Question 16 options: Conductivity meter pH paper Visual indicator

One light year is about 9 trillion kilometers. Arcturus is a star that is 37 light years from earth. If you are about 11 years old now, how old will you be when light that is leaving Arcturus today reaches earth?

What is melted rock and minerals found below earths crust

What do many bases have in common? A. They often release oxygen gas. B. They often form hydrogen ions. C. They often release hydrogen gas. D. They often form hydroxide ions.

What is 3 tenths+4tenths