C
Tarnishing of silver is caused by hydrogen sulfide and other sulfur containing compounds in the air reacting to the silver and resulting in a fine layer of silver sulfide. The other answers don't make sense
Al(OH)3 + 3HBr -> AlBr3 + 3H2O
<span>Al(OH)3 is a solid, HBr is aqueous, AlBr3 is aqueous and H2O is liquid.
</span>
<span>Ionic Equation </span>
<span>Al(OH)3 + 3H^+ -> Al^3+ + 3H2O</span>
Answer:
A
Explanation:
Recall that a mole of any substance contains 6.02 × 10²³ amounts of that substance.
In other words, a mole of gold atoms contains 6.02 × 10²³ gold atoms.
Hence, by dimensional analysis, we have that:
Therefore, there is about 7.99 × 10⁻³ moles of gold present in the sample.
In conclusion, the answer is A.
Answer: I wanna say D because pangea was tectonic plates that moved and reshaped the earth
Explanation:
I hope that helps