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d1i1m1o1n [39]
3 years ago
8

Can someone help me on number 7

Chemistry
1 answer:
Artist 52 [7]3 years ago
3 0

The answer is "C" because all isotopes have a different mass number. The number of protons does not change. The mass of electrons is negligible. Thus, the number of neutrons changes.

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I believe it is A accumulation of lactic acid in the muscles of her limbs.
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3 years ago
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_________ is the mechanical separation of a mixture based upon the sizes of the mixtures components.
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Answer:

Sieving

Explanation:

Sieving is a mechanical separation technique which depends on the relative sizes of particles in the mixture.

A mesh is used to discriminate between particle sizes. Particles in the mixture which are larger than the mesh size do not pass through the sieve, hence particles whose size is less than that of the mesh are separated from the rest of the particles in the mixture.

4 0
3 years ago
¿Cuáles son las grasas e hidróxidos más efectivos en la elaboración de jabón?
d1i1m1o1n [39]

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Explanation:

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Juntos estos dos productos forman el proceso de saponificacion.

6 0
3 years ago
If you want to use a serial dilution to make a 1/50 dilution. The first dilution you make is a 1/5 dilution with a total volume
uranmaximum [27]

Answer:

0.2 mL stock solution, 0.8 solvent, 0.1 mL first solution and 0.9 solvent

Explanation:

The final volume for fist solution is 1 mL and concentration must will be 1/5, then 1 mL/5=0.2 mL. For complete the 1 mL add the missing solvent volume 1 mL-0.2 mL=0.8 mL. For second solution, assuming final volume is 1 mL, and concentration 1/10, then we have 1 mL /10=0.1 mL solution 1/5. Completing volume, 1 mL-0.1 mL= 0.9 mL solvent.

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.Which of the following is an exothermic reaction?
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4 years ago
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