Answer:
an oxygen atom with 8 electrons, 8 protons and 9 neutrons
Comets are icy bodies because they originate in areas beyond Neptune.
Option a
<u>Explanation:</u>
Comets are icy, “small solar system” bodies that, warms up and begins to release gases or dust when it passes close to the Sun. The nucleus of a comet is made up of an combination of rock, dust, water ice, and frozen carbon dioxide, carbon monoxide, methane, and ammonia while the surface of the nucleus is generally dry, dusty or rocky.
They are often called as dirty snowballs because of their physical appearance and due to the fact that these Short-period comets originate in the Kuiper belt that lies beyond the orbit of Neptune. Comets have an icy body because they originate from a disk-shaped band of icy objects known as the “Kuiper Belt” that lies just “beyond Neptune's orbit”, with gravitational interactions with the outer planets dragging these bodies inward.
Molarity is defined as the number of moles dissolved in 1 L of solution .2 mol of NaOH has been dissolved in a volume of 3 L.
we need to then find the number of NaOH moles dissolved in 1 L.
Molarity = number of moles / volume in L
Molarity = 2 mol / 3 L = 0.67 mol/L
Therefore molarity of NaOH - 0.67 M
<u>Answer:</u> The number of phosphorus atoms in given amount of copper(II) phosphate is 
<u>Explanation:</u>
We are given:
Moles of copper(II) phosphate 
= 7.00 mol
1 mole of copper(II) phosphate contains 3 moles of copper, 2 moles of phosphorus and 8 moles of oxygen atoms
Moles of phosphorus in copper(II) phosphate = 
According to the mole concept:
1 mole of a compound contains 
number of particles
So, 7.00 moles of copper(II) phosphate will contain = 
number of phosphorus atoms.
Hence, the number of phosphorus atoms in given amount of copper(II) phosphate is
Answer: C
Explanation: Took the test
