only metals above hydrogen
Explanation:
On the activity series, only metals above hydrogen will displace it in solution.
The activity series is a list of metals and non-metals that shows how reactive they are.
- Metals high in the series are highly reactive.
- Those that are down below are less reactive.
- As a rule of thumb, any metal higher than another in the series will displace it from the solution containing the lower metal.
- As with hydrogen, only metals that above it will displace it from solutions.
- Reactions of this kind are called single displacement reactions
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Answer:
D) 3.51x10²³ formula units
Explanation:
To know this, we need to calculate the molecular mass of CaO. To do that, let's use the atomic mass of each element of this compound.
Ca: 40.08 g/mol; O: 16 g/mol
With these given AM, let's calculate the molar mass of CaO:
Mm CaO = 40.08 + 16 = 56.08 g/mol
Now that we have the MM of CaO, it's time to determine the moles of CaO:
moles = mass / MM
moles = 32.7 / 56.08 = 0.5831 moles
Finally to get the formula units, we need to use the Avogadro's number which is 6.02x10²³. According to this number, 1 mole of any substance has this number of atoms, molecules or formula units. So, if we have 0.5831 moles, then the formula units will be:
FU = 0.5831 * 6.02x10²³
<h2>
FU = 3.51x10²³ formula units</h2>
Hope this helps
Answer:hydrates
Explanation:Hydrate, any compound containing water in the form of H2O molecules
Answer:
B. The electronegativities of the two atoms are equal.