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Eddi Din [679]
3 years ago
11

1. which of the following elements is NOT multivalent?

Chemistry
1 answer:
irakobra [83]3 years ago
4 0

Answer: it is A .

hope this helps!!!!

Explanation:Be is not multivalent

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goblinko [34]
It's proteins, (i took the the test and got an A) good luck hope this helps!!!
6 0
3 years ago
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1s2 2s2 2p6 3s2 3p6 is the electron configuration for
kvasek [131]

Answer: The electron configuration is for the element Argon

Explanation: 3p6 is all the way on the right side of the periodic table in the third row or period

3 0
4 years ago
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Determine the overall reaction and its standard cell potential (in V) at 25°C for the reaction involving the galvanic cell made
mel-nik [20]

Answer:

Standard cell potential is 0.56V

Explanation:

Standard reduction potential (E^{0}) are given below-

                             E_{Cu^{+}\mid Cu}^{0}=0.52V

                              E_{Fe^{3+}\mid Fe}^{0}=-0.04V

As E_{Cu^{+}\mid Cu}^{0} is greater than E_{Fe^{3+}\mid Fe}^{0} therefore Fe will be oxidized to Fe^{3+} and Cu^{+} will be reduced to Cu

Oxidation: Fe(s)-3e^{-}\rightarrow Fe^{3+}(aq.)

Reduction: Cu^{+}(aq.)+e^{-}\rightarrow Cu(s)

------------------------------------------------------------------------------------------------------

Overall: Fe(s)+3Cu^{+}(aq.)\rightarrow Fe^{3+}(aq.)+3Cu(s)

Standard cell potential, E_{cell}^{0}=E_{Cu^{+}\mid Cu}^{0}-E_{Fe^{3+}\mid Fe}^{0}=(0.52+0.04)V=0.56V

3 0
4 years ago
A mountaineer shouts for help Half a second later (0.5 she hears the echo How far away is the rock face which is reflecting her
irinina [24]

Answer:

THE DISTANCE OF THE ROCK REFLECTING HER VOICE IS 82.5 METERS.

Explanation:

In sound waves, the speed of a sound is equal to twice the distance divided by time.

Mathematically,

Speed = 2 * Distance/ Time

Speed = 33- m/s

Time = 0.5 second

Distance = unknown

So re-arranging and introducing the variables into the formula, we have;

Distance = speed * time / 2

Distance = 330 * 0.5 / 2

Distance = 82.5 meters.

The distance away from the rock face which is reflecting her voice is 82.5 meters.

7 0
4 years ago
1
larisa [96]

Answer:

group I: alkali metals

group II (beryllium to radium): alkaline earth metals

group II (scandium to zinc , yttrium to cadmium, lanthanoid series to mercury, actinoid series to copernicium): transition metals

group VII (fluorine to astatine): halogens

group VIII: (helium to radon): noble gases

Explanation:

3 0
3 years ago
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