Answer:
D) single replacement
Explanation:
Given reaction:
Mg + 2HCl → MgCl₂ + H₂
The reaction shown above is a single displacement reaction.
In a single displacement reaction, a more reactive atom displaces another from a given compound.
The comparison here is between Mg and H.
On the activity series, Mg is higher and more reactive, it will displace H from the solution of HCl. This
This reaction type is called a single replacement reaction.
Answer:
Larynx
Explanation:
The larynx is a cartilaginous structure inferior to the laryngopharynx that connects the pharynx to the trachea.
Answer:
Lithium 7
Explanation:
An isotope is based off the number of neutrons present 3+4=7
Look on the periodic table to find the element number
Answer:
6(3) - 4 + (3)^2
Explanation:
We are given that:
f(x) = 4-x^2
g(x) = 6x
First, we will compute (g-f)(x) as follows:
(g-f)(x) = 6x - (4-x^2) = 6x - 4 + x^2
Now, we will substitute with x=3 as follows:
(g-f)(3) = 6(3) - 4 + (3)^2
Hope this helps :)