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olganol [36]
3 years ago
11

Which of the following represents alpha decay?

Chemistry
1 answer:
aliya0001 [1]3 years ago
8 0

Answer: b

Explanation: alpha decay or particle consist of two protons and two neutrons hence it is a helium nucleus.

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Choose the substance with the lowest surface tension. choose the substance with the lowest surface tension. (ch3)2so ch3ch2ch2ch
8090 [49]

Surface tension is defined as the tendency of elasticity of a liquid surface that makes it to achieve the possible least surface area. It depends upon the intermolecular forces present on the boundary of the surface of the compound and its contact.

n-butane (CH_{3}CH_{2}CH_{2}CH_{3}) is non-polar compound and it consist of only weak dispersion forces that are responsible for any contact with the surface.

In comparison to other given substances, n-butane has the weakest dispersion forces. Thus, n-butane has lowest surface tension.

4 0
3 years ago
PLEASE HELP ASAP!!!
kogti [31]
1 CH4 (g) + 2 O2 (g) -----> CO2 (g) + 2H2O(l) ΔH= - 890 kJ
1 mol           2 mol
1)  If ΔH has minus, it means "release". We need only "release" choices.<span>
2) From reaction
1 mol </span>CH4 (g)  "releases"  ΔH= - 890 kJ  - We do not have this choice.

2 mol  O2 (g)   "release" ΔH= - 890 kJ, so
1 mol  O2 (g)   "release" ΔH= - 445 kJ
Correct answer is B.
3 0
3 years ago
Read 2 more answers
What is the poH of a 3.67 x 10-5 M OH solution and is it acidic, basic, or neutral?
Anni [7]

Answer:

The pOH is  4, 44 and the solution is basic.

Explanation:

The pOH is a measure of the concentration of OH (hydroxyl) ions in the solution.

The pOH is calculated as :

pOH = -log (OH-)= -log (3.67 x 10-5 )= 4, 44. In this case, the solution is basic.

The p0H scale ranges from values of 0 to 14 (less than 7.0 is basic and greater than 7.0 is acidic, a pH = 7.0 is neutral)

3 0
3 years ago
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daser333 [38]

It looks red because you can see the red gelatin particles in the mixture. However, the particles are too small to settle to the bottom of the dish. A suspension is a heterogeneous mixture with large particles. The particles are large enough to see and also to settle or be filtered out of the mixture


5 0
3 years ago
In which of the following is the number of neutrons correctly represented? A. fluorine: atomic number 9, mass 19, neutrons 0 B.
Digiron [165]
D. uranium: atomic number 92, mass 238, neutrons 146

238-92=146
4 0
3 years ago
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