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Ray Of Light [21]
3 years ago
10

Use the drop-down menus to label each of the following changes P for physical change and C for the chemical change. The substanc

e changes to a new substance, the original substance can be recovered, the color changes, gas is produced and given off, and the substance changes size, shape, or volume
Chemistry
2 answers:
zhannawk [14.2K]3 years ago
8 0

Answer:c,p,c,c,p

Explanation:

dlinn [17]3 years ago
6 0

Answer:

Chemical, Physical, Chemical, Chemical, Physical!!

Explanation:

I just did it correctly.

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_Au2S3 + _H2---> _Au + _H2S
timofeeve [1]
The answer is A because if you place the first two numbers 1 and 3
Au=2
S=3
H=6
It has to equal to the product so then you put in the last two numbers 2 and 3
Au=2
S=3
H=6
4 0
3 years ago
Read 2 more answers
Sammy and Marisa are asked to determine what kind of bonds are present in the
kotykmax [81]

Answer:

I think Sammy is right because I'm sure the compound contains ionic bonds

7 0
2 years ago
Pls help this a test for Google classroom
muminat

Occurs at a specific temperature

5 0
3 years ago
Determine the equilibrium constant, Keq, at 25°C for the reaction
adelina 88 [10]

Explanation:

The given chemical reaction is:

2Br^- (aq) + I_2(s)  Br_2(l) + 2I^- (aq)

E^ocell=oxidation potential of anode + reduction potential of cathode\\

The relation between Eo cell and Keq is shown below:

deltaG=-RTlnK_e_q\\delta=-nFE^o cell\\=>nFE^o cell=RTlnK_e_q\\lnK_e_q=\frac{nF}{RT} E^o cell

The value of Eo cell is:

Br- undergoes oxidation and I2 undergoes reduction.

Reduction takes place at cathode.

Oxidation takes place at anode.

Hence,

E^ocell= (-1.07+0.53)V\\=-0.54V

F=96485 C/mol

n=2 mol

R=8.314 J.K-1.mol-1

T=298K

Substitute all these values in the above formula:

ln K_e_q=\frac{2mol* 96485 C/mol}{8.314 J.K^-^1.mol^-^1x298K} \\\\lnK_e_q=77.8\\K_e_q=e^7^7^.^8\\=>K_e_q=6.13x10^3^3

Answer:

Keq=6.13x10^33

3 0
3 years ago
How many moles of iron in a sample that contains 7.91×10^23 atoms of iron?
vazorg [7]

Answer: 1.31

Explanation:  

No.of moles = given no.of atoms/Avagadro number

= 7.91×10^23 / 6.022 x 10^23

= 1.31

therefore, no.of moles = 1.31

Hope it helped u,

pls mark as the brainliest

^_^

5 0
3 years ago
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