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3 years ago

What are the base units the SI units are based on? A-10 B-100 C-1,000 D-1

Chemistry

1 answer:

Olegator [25]3 years ago

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Answer:

A-10

Explanation:

In the SI, designations of multiples and subdivision of any unit may be arrived at by combining with the name of the unit the prefixes deka, hecto, and kilo meaning, respectively, 10, 100, and 1000, and deci, centi, and milli, meaning, respectively, one-tenth, one-hundredth, and one-thousandth.

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¿Cuál es la velocidad de un electrón que gira en la órbita n=2 en un átomo de cobre?

Marrrta [24]

Answer:Estructura de la materia, átomo de hidrógeno, modelo de Bohr. ... Esto significaba que el electrón no puede tener cualquier velocidad, y por lo ... Despejando el valor del radio de la órbita del electrón en el primer postulado de ... ecuación (10) cuando n = 1; el segundo r2 para n = 2; el tercero r3 para n = 3

Explanation:

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3 years ago

How many electrons, protons and neutrons are in the element tin

lisabon 2012 [21]

Answer: Tin has 48 electrons, 69 neutrons, and 50 protons.

Explanation:

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3 years ago

Infrared radiation A) Heat from warm objects, used to detect the location of objects Microwaves B) All the radiation humans can

Kazeer [188]

Answer:

Infrared radiation → A) used to detect the location of objects

Microwaves → D) Used in radar and to heat food

Ultraviolet light → C)Given off by very hot objects, such as the sun Heat from warm objects

Visible light → B) All the radiation humans can see, ranging from red to violet

Explanation:

Microwaves have magnetic waves with very long lengths, greater than that of infrared light. These waves are produced through vibrations that produce heat, as the microwave is turned on, which allows the food to be heated. These waves are also used to provide communication on some types of devices.

Infrared radiation is a type of non-ionizing radiation that has a low frequency and therefore cannot be visualized, since it is not within a visible electromagnetic spectrum, having a frequency lower than red. It can be used to detect the licalization of objects and does not pose a health risk.

Ultraviolet radiation is extremely harmful to our body. It is characterized by radiation with very small wavelengths, less than 400nm. This type of radiation can be released by the sun and ultraviolet lamps.

Visible light refers to the simplest form of electromagnetic wave and covers all the radiation that our eyes can see, allowing different colors to be seen in the objects we observe according to the reorganization of atoms and molecules.

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3 years ago

10) Explain what arsenic had to do with preserving bodies in the past and how that related to Sylvester’s body. Tell me how the

Salsk061 [2.6K]

10) Arsenic is a chemical agent which was used in preserving dead bodies in the past. It is mainly a formaldehyde mixture with coloring agents to give a dead body the look of life. Sylvester was a third mummy that was embalmed with arsenic in the late 1800s and is now on exhibit at Ye Olde Curiosity Shop in Seattle, Washington. His mummified body showed an extremely unusual since the remains weighed approximately 80 lbs when a body is composed of 70-80% water, after dehydration, the weight should be about 20-30% the premortem weight. The solution was also used during Civil War to preserve dead bodies <span>as the dead were being shipped home from the battlefield.
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9) R<span>esearch can yield dates when certain plants/animals became domesticated and entered the standard diets of people, meaning you would not see masses eating beef before the cow became domesticated. To further this you can look at when a specific food was introduced into the diets of people in the geographic area of the person you are studying. </span>

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4 years ago

To maximize the yield in a certain manufacturing process, a solution of a weak monoprotic acid that has a concentration between

stira [4]

Answer: C 115 ml

Explanation:

If you have a solution of a monoprotic acid, it means that it has the form HA (just one Hydrigen atom). Therefore, one molecule of acid is going to react with just one molecule of NaOH.

So, if you have a solution of 100 ml of 0,2 HA acid, it is going to react with a 100 ml of 0,2 M NaOH solution. Beacause we know that the acid can be a little more concentrated than 0,2 M (0,2-0,3), it probably needs a little more than 100 ml of NaOH to react. So, the answer is C.

in 100 ml of 0,2M acid you can find 0,002 mol of HA

in 100 ml of 0,3 M acid you can find 0,003 mol of HA

in 100 ml of 0,2 M NaOH you can find 0,002 mol of NaOH

the answer can not be 200 because in 200 ml of 0,2 M NaOH there are 0,004 mol of NaOH, which is more than 0,003 mol.

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4 years ago