ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
Who determined the mass of the electron?

Niels Bohr
Linus Pauling
Robert Millikan
J.J. Thomson

Answer:

c

Explanation:

Answer:

《●《HOPE IT HELPS YOU 》●》

ANS--> (C)

Answer:

It is and isn't possible at the same time.

Explanation:

Stars form when enough hydrogen collects in one place that the sheer gravitational attraction of the mass to itself causes thermonuclear fusion to commence. Unlike a nuclear bomb, the reaction doesn’t last for milliseconds, but for billions of years, as convection currents carry fresh supplies of unfused hydrogen into the reaction zone, and as heavier, already fused material undergoes fusion again, starting a stepladder of elemental construction, building the table of elements from hydrogen up toward iron as far as conditions will allow.  So basically, the sun doesn’t burn all at once for the same reason a candle doesn’t: It relies on convective processes to freshen its fuel supply

A change that produce matter with a different composition is a chemical change.

Answer:

This question lacks options, the options are:

a. an observation

b. a dependent variable

c. an independent variable

d. a control

The answer is D. Control

Explanation:

According to the question, a student decides to conduct an experiment to determine the effect that the amount of time spent in sunlight has on the overall growth of a plant. The student keeps all other variables needed for the plants' growth in this experiment the same/identical. These variables kept identical by the student is called CONTROL OR CONSTANT.

One of the CONTROL is the amount of water given to each plant. The amount of water given to the two plants being tested must be the same. Hence, WATER in this experiment is a CONTROL VARIABLE.

Note that, the independent/manipulable variable is the amount of time spent in sunlight while the dependent/measurable variable is the growth of the plants.

Answer:

The answer is D control

Explanation:

Answer:

Heterogeneous method

Explanation:

In general, a gravimetric method of analysis consists

of the following steps:

Weighing and dissolving the sample in the proper solvent.

Carrying out a sequence chemical reactions to  obtain a suitable product.

Determining the mass of the product

Calculating the composition of the sample rom mass of product and information about the original sample.

Precipitates obtained by heterogeneous methods are often difficult to filter and are always contaminated by  adsorbed and occluded impurities which ultimately increase the percentage yield of  nickel due to occluded impurities.

Answer:

It is expensive, largely because of the amount of electricity required in the extraction process. Aluminium ore is called bauxite . The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted. The extraction is done by electrolysis.

Answer:

d

Explandation:

Answer:

A.

Explanation:

Because the first organism was bacteria and bacteria does not need oxygen to grow

Answer:

i mean kinda they should throw people in the air tho lol

Explanation:

Answer:

B

Explanation:

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.

Answer:

The correct answer is hot, dense points; each smaller than an atom

Explanation:

The big bang theory was proposed to suggest the expansion of the universe by describing the origin of all components of the universe and it's planetary bodies. It suggested that the whole universe was in a state of high temperature and highly dense points (which were smaller than atoms) but continuously expanded by cooling down which gave rise to the formation of subatomic particles, atoms e.t.c.

Answer:

Its D on edge 2021

Explanation:

just took the test

Answer:

Catalase

Explanation:

These reactive oxygen specie or free radicals that cause damage or injury to cells also lead to oxidative stress if unchecked by antioxidants. As suggested in the question, there are several enzymes that act as antioxidants in mitigating the effects of these reactive oxygen specie or free radicals. These enzymes include catalase, superoxide dismutase and glutathiones (such as glutathione s-transferase).

The enzyme that however prevents the accumulation of hydrogen peroxide (H₂O₂) in the peroxisome is catalase. Catalase is an enzyme that is present in the peroxisome; it (catalase) detoxifies/acts on H₂O₂, converting it (H₂O₂) into water and oxygen.

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\[/tex]

From the question

mass = 112 g

density of mercury = 13.6 g/mL

We have

[tex]volume = \frac{112}{13.6} \\ = 8.23529411...[/tex]

We have the final answer as

Hope this helps you

Answer:

0.6802 mol

Explanation:

1 grams K2S  = 0.00907 mol

0.00907 x 75 = 0.6802 mol

Answer: 250 miles

The rate for 1 hour is 50 miles per hour. We must multiply 50 by 5 to find the distance drove in 5 hours.

50 x 5 = 250.

The answer to the question is 250.

Answer:

196.96657 u

Explanation:

Answer:

I think the answer is stored energy

Explanation:

The energy that an item has stored inside it as a result of its location in relation to a zero point is known as potential energy. If an item is placed at a height above the zero height, it has gravitational potential energy. A good description of potential energy is stored energy.

Potential energy is the power that an item may store due to its position in relation to other things, internal tensions, electric charge, or other circumstances.

The energy released during a chemical reaction is known as chemical potential energy. It is the energy that was accumulated before chemical fusion. Crackers, a charged battery, etc. are a few examples.

Potential energy has a simple definition, It is a type of energy that possesses the ability to perform work but is not now performing work or exerting any force on any other things. In other words, potential energy concerns object positions rather than object movements.

Thus, option B is correct.

To learn more about potential energy follow the link below;

https://brainly.com/question/24284560

#SPJ2

Answer:

B) weight

Thats it no explanation

Answer:

B) weight

Explanation:

Weight is gravity's pull on an object. This would change if you went to the moon. Gravitational

Mass is the amount of the object. This would stay the same if you went to the moon. Non-gravitational

Answer:

thermal and light energy

Answer:

it is helium so A.........

He is the chemical symbol for Helium.

Answer:

If the valves of the heart do not close, the blood will flow backwards. Blood will escape back into the chambers rather than flowing forward through the heart or into an artery.

Explanation:

Answer:

Nucleus

Explanation:

Since electrons are 1/1840 of the weight of a proton or a neutron, all of which are in the nucleus, scientists often don't include them.

Answer:

Metals tend to lose electrons to form positive ions.

Answer:

it's HF

Explanation:

Answer:

116 km/h

Explanation:

We know that km/h means Kilometers an hour. And if this is constant, then he will travel 116 km/h.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 100 g

volume = 12 mL

We have

[tex]density = \frac{100}{12} = \frac{25}{3} \\ = 8.333333...[/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

Scientific investigations produce evidence that helps answer questions and solve problems. If the evidence cannot provide answers or solutions, it may still be useful. It may lead to new questions or problems for investigation. As more knowledge is discovered, science advances.

Answer:

Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)

Explanation:

Iron is extracted in a blast furnace. The temperature inside the blast furnace goes a s high as 2000 degrees centigrade.

The iron III oxide ore fed into the furnace reacts with carbon II oxide obtained by the reduction of carbon IV oxide by coke yielding liquid iron and carbon IV oxide

Answer:

no he just repeated the steps and made more of the same cleaner my guy

Explanation: