40.0 g ( 1 mole ) --------------- 6.02x10²³ molecules
? ? --------------------------- 2.90x10²² molecules
mass = 2.90x10²² * 40.0 / 6.02x10²³
mass = 1.16x10²⁴ / 6.02x10²³
mass = 1.9269 g
hope this helps!
Answer:
1 I'm doing this in science class right now I got help yesturday on it! hope this helps
Answer is 3
because on the periodic table, the small number above every element is the number of protons
Answer: Chloroplasts
Reasoning: I just had my 830th lesson in school about these
Answer:
By sharing their valence electrons, both hydrogen atoms now have two electrons in their respective valence shells. Because each valence shell is now filled, this arrangement is more stable than when the two atoms are separate.
Explanation:
