D an average train goes 300 km/h or 190-220 mph
Actually, I strongly believe it is a switch.
C
the chances of survival is the amount of offsprings the animal has therefore the answer is C.
About <u>1 in 500,000,000</u> molecules in a glass of water are dissociated.
<h3>What is water?</h3>
Water can be defined as a liquid molecule or chemical compound that typically comprises two (2) main chemical elements in a ratio of two (2) atoms of hydrogen to one (1) atom of oxygen. This ultimately implies that, these two (2) chemical elements include the following:
Water is an amphoteric chemical compound (substance), which ultimately implies that it can accept a proton that is also acting as a base, while also donating a proton that acts as an acid as shown in the balance chemical reaction below:
2H₂O(l) ⇄ H₃O⁺(aq) + OH⁻(aq)
Based on scientific research and experiments, approximately one (1) water molecule in half a billion (500,000,000) dissociate into an OH⁻ ion, especially by losing a proton to another water molecule.
Read more on water here: brainly.com/question/15164981
#SPJ1