Answer:
It is double displacement reaction
Answer:
millions
Explanation:
the 1 is seven decimbal places to the left (seven places left of zero), which is the millions place
If enough HCl is not added, the percent yield will be lower as all the magnesium metal has not reacted with HCl.
<h3>What is percent yield of a reaction?</h3>
The percent yield of a reaction is the ratio of the actual yield and the expected yield expressed as a percentage.
- Percent yield = actual yield/expected yield × 100%
The reaction between magnesium metal and HCl liberates hydrogen gas and forms magnesium chloride salt.
If enough HCl was not added to react with all the magnesium metal, the actual yield will be lower.
Hence, percent yield will be lower as well.
Therefore, the percent yield will be lower if all the magnesium metal has not reacted with HCl.
Learn more about percent yield at: brainly.com/question/10046114
Answer:
Co (assuming there's a typo in not capitalizing the first letter)
Explanation:
The elements are depicted in the periodic table. Those are fundamental atoms that are not bonded to anything else but exist in their natural states without forming a bond with anything. That said, we're interested in a monoatomic species listed (the species which consist from only one single atom).
Out of all the choices, we have Co, cobalt, which is a single atom and can be found as an element with the atomic number 27.
Carbonic acid, 
, consists of 3 different elements: hydrogen (atomic number of 1), carbon (atomic number of 6) and oxygen (atomic number of 8). It's a compound rather than an element, as it consists of several atoms bonded together.
Oxygen, 
, is also a molecule. It consists of more than a single atom, even though the two atoms are identical. We have a compound, oxygen gas, which consists of two same oxygen (O) atoms (or elements).
Hydroxide anion, 
, also consists of two elements: oxygen and hydrogen. It also contains a charge on it, so rather than being a molecule, this is now an ion. Since it consists of more than a single atom, this is not an element as well.
Answer:
45
Explanation:
the answer is 45 due to the calculation of the master calculation
