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drek231 [11]
3 years ago
13

9. The major human causes of extinction today are

Chemistry
1 answer:
DaniilM [7]3 years ago
8 0

Answer:

c

Explanation:

because of over-hunting, poaching, pollution, loss of habitat, the arrival of invasive species, and other human-caused problems

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How can carbon 14 and carbon 12 be the same element when both have the same number of protons (6 protons) but different number o
lys-0071 [83]
Carbon 14 and carbon 12 are the same element because they contain the number of proton in the periodic table. but the different in number (14 and 12) is from the neutron
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4 years ago
Explain whether each of the possible reactions listed below will occur. For those that will, predict what the products will be.
Alex777 [14]

Answer:

Zn(s) + 2H₂O (l) → Zn(OH)2(aq) + H2(g)

Sn(s) + O2(g) →SnO2(s)

Cd(s) + Pb(NO3)2 (aq) →Cd(NO3)2 (aq) + Pb(s)

Cu (s) + HCl(aq) → can not occur

Explanation:

Metals reacts with liquid water to yield the corresponding metallic hydroxide and hydrogen gas as shown above; Zn(s) + 2H₂O (l) → Zn(OH)2(aq) + H2(g)

Tin reacts with oxygen to yield tin (IV) oxide. This is an oxidation reaction as shown; Sn(s) + O2(g) →SnO2(s)

The reaction between Cd and Pb(NO3)2 is a single replacement reaction. It is possible because Cd is above Pb in the electrochemical series. Hence the reaction occurs thus; Cd(s) + Pb(NO3)2 (aq) →Cd(NO3)2 (aq) + Pb(s)

Copper does not displace hydrogen from dilute acids (such as HCl) since copper is lower than hydrogen in the electrochemical series hence the reaction does  not occur.

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3 years ago
A liquid that occupies a volume of 4.7 liters has a mass of 5.1 kilograms what is the density of the liquid in kg/L
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