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3 years ago

Which conclusion could be made from Ernest Rutherford’s gold foil experiment?

2 answers:

8 0

The nucleus while large has a small ratio of mass when dealing with atoms, they are very spread out and are mostly solid with a blocky shape.

Dmitriy789 [7]3 years ago

5 0

Answer:

The correct option is :Atoms are made up of mostly empty space.

Explanation:

Ernest Rutherford’s gold foil experiment has following observation:

Most of the alpha particles had easily escaped through the atom which accounts for that atom is mostly empty space.
Very less number of alpha particles were deflected from their path which indicated that positive charge is only concentrated in the center of the atom which termed as nucleus of an atom where positively charged i.e protons are located.
Whole the mass of an atom is concentrated in the nucleus of the atom.

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andre [41]

Answer: im not writting a pharaphraph. Buuuuuuuuuuuut... explian the type of reaction then explanie how that type of reaction works.

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2 years ago

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A 20.0 g piece of a metal is heated and place into a calorimeter containing 250.0 g of water initially at 25.0 oC. The final tem

BartSMP [9]

Answer:

$Q_{metal} = -6799\,J$

Explanation:

By the First Law of Thermodynamics, the piece of metal and water reaches thermal equilibrium when water receives heat from the piece of metal. Then:

$Q_{metal} = - Q_{w}$

$Q_{metal} = m_{w} \cdot c_{p,w}\cdot (T_{1}-T_{2})$

$Q_{metal} = (250\,g)\cdot \left(4.184\,\frac{J}{g\cdot ^{\textdegree}C} \right)\cdot (25\,^{\textdegree}C - 31.5\,^{\textdegree}C)$

$Q_{metal} = -6799\,J$

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3 years ago

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An important difference between fuel cells and batteries is that batteries _______. Select the correct answer below: do not requ

aliya0001 [1]

Answer: the correct option is that batteries (do NOT require a continuous source of fuel).

Explanation:

A battery can be classified as an electrochemical cell that has the ability to produce electric current. They do NOT require a continuous supply of fuel because it contains all the reactants needed to produce electricity. Below are some examples of batteries that are commonly used:

--> Primary battery: This is a single use battery because it can't be recharged. A typical example is the dry cell.

--> Secondary battery: This type of battery can be recharged. They are used as a power source for smartphones, electronic tablets, and automobiles.

A FUEL CELL is known as a device that converts chemical energy into electrical energy. Fuel cells are similar to batteries but require a continuous source of fuel, often hydrogen. They will continue to produce electricity as long as they are constantly resupplied with reactants. Hydrogen fuel cells have been used to supply power for satellites, space capsules, automobiles, boats, and submarines.

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2 years ago

Question 10

sveticcg [70]

False. Sarah has not achieved homeostasis.

<h3>What is homeostasis?</h3>

It is the maintenance of a relatively unchanged internal process in the body of organisms.

Since the resting heart rate for Sarah is 70 bpm, a 100 bpm is a far cry from the normal resting heart rate.

Thus, it cannot be said that Sarah has achieved homeostasis.

More on homeostasis can be found here: brainly.com/question/3888340

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2 years ago

Does silver form a gas? Yes or no.

Ilya [14]

Answer:

Yes it does

Explanation:

Silver is a chemical element with the symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.[citation needed] The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.

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3 years ago