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3 years ago

Why are metals good conductors of heat and electricity

2 answers:

7 0

Electric current is the flow of electrons in a wire. ... They are no longer firmly held by a specific atom, but instead they can move freely through the lattice of positive metal ions

SVETLANKA909090 [29]3 years ago

7 0

Metals are good conductors because the molecules that are inside the metal are tightly packed together. This is why the heat moves through the metal quickly.

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Based on the structure, which material will dissolve this biomolecule the best? dilute alcohol water oil ionic solution

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I think that it would be ionic solution

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3 years ago

Which statement correctly describes metallic bonds?

Black_prince [1.1K]

Answer:

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2 years ago

Which compound would you expect to be soluble in the nonpolar solvent carbon disulfide?

ch4aika [34]

Answer:

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2 years ago

An atom has a mass number of 43 and an atomic number of 23. How many protons does it have?

Airida [17]

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3 years ago

A 29.7 g sample of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to

Softa [21]

Answer: The mass of iron in the ore is 10.9 g

Explanation:

We are given:

Mass of iron (III) oxide = 15.6 g

We know that:

Molar mass of Iron (III) oxide = 159.69 g/mol

Molar mass of iron atom = 55.85 g/mol

As, all the iron in the ore is converted to iron (III) oxide. So, the mass of iron in iron (III) oxide will be equal to the mass of iron present in the ore.

To calculate the mass of iron in given mass of iron (III) oxide, we apply unitary method:

In 159.69 g of iron (III) oxide, mass of iron present is $(2\times 55.85)=111.7g$

So, in 15.6 g of iron (III) oxide, mass of iron present will be = $\frac{111.7g}{159.69g}\times 15.6g=10.9g$

Hence, the mass of iron in the ore is 10.9 g

7 0

3 years ago