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4 years ago

Ernest Rutherford's gold-foil experiment showed which of the following?

Chemistry

1 answer:

loris [4]4 years ago

4 0

Ernest Rutherford's gold-foil experiment showed the density of atoms.
The experiment proved that most of an atom is empty space with a very small positively charged nucleus in the middle.
So, from the given statements he following is true:
Ernest Rutherford's gold-foil experiment showed the existence of a dense, positively charged center in an atom.

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Which of the following elements is a metalloid

vladimir1956 [14]

Traditionally they include boron from group 3A, silicon and germanium in group 4A, aresnic and antimony in group 5A and tellurium from group 6A, although sometimes selenium, astatine, polonium and even bismuth have also been considered as metalloids. Typically metalloids are brittle and show a semi-metallic luster.

The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. Five elements are less frequently so classified: carbon, aluminium, selenium, polonium, and astatine.

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3 years ago

When elemental boron, B, is burned in oxygen gas, the product is diboron trioxide. If the diboron trioxide is then reacted with

zalisa [80]

Answer: The chemical equation is written below.

Explanation:

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.

The chemical equation for the reaction of elemental boron and oxygen gas follows:

$4B+3O_2\rightarrow 2B_2O_3$

By Stoichiometry of the reaction:

4 moles of elemental boron reacts with 3 moles of oxygen gas to produce 2 moles of diboron trioxide.

The chemical equation for the reaction of diboron trioxide and water follows:

$B_2O_3+3H_2O\rightarrow 2H_3BO_3$

By Stoichiometry of the reaction:

1 mole of diboron trixoide reacts with 3 moles of water to produce 2 moles of boric acid.

Hence, the chemical equations are written above.

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3 years ago

What is the percent yield of 20.0g P4 O10 are produced?

enyata [817]

Answer:

You must divide the grams of your actual yield by the grams of the theoretical yield and multiply by 100 in order to obtain percent yield

Explanation:

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3 years ago

Given the reaction that occurs in an electrochemical cell:

KatRina [158]

Answer:

c) +2 to 0

Explanation:

SO4 has a charge of -2, so the Cu attached to that has to be a +2 since the polyatomic molecule has no overall charge

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Copper undergoes Oxidation (gain of electrons)

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3 years ago

Read 2 more answers

The is the variable that gets measured

ddd [48]

Answer:

what? what's the full question?

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3 years ago