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3 years ago

The reaction of sodium and chlorine to form salt is best described as an?

1 answer:

4 0

The chemical reaction that takes place between sodium and chlorine to form table salt (NaCl) gives off heat; therefore, this can be described as an exothermic chemical reaction.

Brainliest answer please?

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What fundamental building block makes up all matter in the universe

Sloan [31]

The building block that makes up all matter in the universe is atoms.

Hope that helps you:)

6 0

3 years ago

A grapefruit has a weight on earth of 4.9 newtons. what is grapefruit's mass

Kobotan [32]

The force of gravity is the force with which massively large objects such as the earth attracts another object towards itself. All objects of the earth exert a gravity that is directed towards the center of the earth. Therefore, the force of gravity of the earth is equal to the mass of the object times acceleration due to gravity.

F = ma 
4.9N = m (9.8 m/s^2), note that N (newtons) = kg-m/s^2 
m = 0.5 kg
The mass of the object is 0.5kg.

7 0

3 years ago

Explain how the information given below could be used to determine the concentration of an unknown sample.

Vika [28.1K]

Answer:

See below

Explanation:Plot the known concentrations and adsorbance data. Draw a best fit line through thwe points. When the absorbance of a solution of unknown concentration (but same substance) is determined, find the concentration from the line at that absorption value. See attached graph.

E.g., an sample of the same substance had an absorbance of 0.35. Find that on the x scale and then determine the concentration that would be required to produce that level of absorbance. 0.483M in this case.

8 0

2 years ago

A medicine is given 73 grains ap/lbs. of patient per dose. The patient weighs 65.7 kilograms. how many drams ap should the apoth

erastova [34]

10,573.4

Explanation:

Given parameters:

Dosage per patient = 73ap/lbs

Weight of patient = 65.7kg

Unknown:

Amount of grams/ap to be given to the patient;

Solution:

Since our final answer should be expressed in grams, let us convert all units into grams.

1000g = 1kg

Converting 65.7kg to g = 65.7 x 1000 = 65700g

73ap/lbs;

1lb = 453.6g

73ap/lbs x $\frac{1lb}{453.6g}$ = 0.161ap/g

Now,

For a 65700g person, the number of grains app required;

65700 x 0.161 = 10,573.4grains ap per dose

learn more:

Mass brainly.com/question/3764212

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3 0

3 years ago

Classify chunky peanut butter as an element, a compound, a heterogeneous mixture, or a homogeneous mixture.

andrezito [222]

Chunky peanut butter is a mixture which is NOT uniform throughout, so it is a heterogeneous mixture.

4 0

3 years ago