Answer:
the particles with a negative charge are protons
Answer:
D
Explanation:
D because living things don't take carbon to survive
Answer:
Ca^2+
Explanation:
As we know, more energy is required to remove an electron from a positively charged ion than is required to remove an electron from a neutral atom. Hence, the second ionization energy of calcium is greater than its first ionization energy.
However, the third and fourth ionization energies of calcium are much higher than the second ionization energy because they involve removal of electrons from an inner filed shell. This process requires a lot of energy and is often not feasible.
Hence, the most common ion of calcium must be Ca^2+ where only two electrons are removed from calcium.
Answer: <span>b. 34.5 g/kg
</span>
The average salinity of the ocean would be 3.45% or 35 parts per millions(ppm). That means 3.45% of the ocean water weight would be contributed by salt. Water density is 1kg/liter or 1000g/1000ml.
Then, 3.45% of it would be: 3.45% * 1000= 34.5g/kg or 34.5g/l
Answer:
450 g/mol
Explanation:
To solve the problem the problem, it is necessary to use Graham's Law of effusion
This answer is consistent with what we know. A heavier gas will require more time to effuse than a lighter gas