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Mekhanik [1.2K]
3 years ago
11

Which element is an example of a metalloid?

Chemistry
1 answer:
Olegator [25]3 years ago
6 0

Answer:

boron

Explanation:

The elements that are generally considered metalloids include boron, silicon, germanium, arsenic, antimony, and tellurium. Other elements such as selenium and polonium are sometimes included as well.

plz mark me as brainliest :)

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What is an isotope?
gizmo_the_mogwai [7]
An isotope of an element is another element that has the same number of protons but a different number of neutrons (for instance ^4_2He and ^3_2He)
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3 years ago
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What is the density of a substance that weighs 100g and has a volume of 68cm3?
exis [7]
D= mass/volume so it's 100/68 which equals 1.47cm3
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Calculate the number of moles of sodium carbonate originally present, if 6.0 ml of 0.100 M HCl were used to titrate the mixture
valina [46]

Answer:

0.0006 mole

Explanation:

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For HCl :

Molarity = 0.100 M

Volume = 6.0 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 6.0×10⁻³ L

Thus, moles of potassium iodide :

Moles=0.100 \times {6.0\times 10^{-3}}\ moles

Moles of HCl = 0.0006 moles

From the reaction shown below:-

HCl+Na_2CO_3\rightarrow NaHCO_3+NaCl

1 mole of HCl reacts with 1 mole of sodium carbonate.

So,

0.0006 mole of HCl reacts with 0.0006 mole of sodium carbonate.

<u>Moles of sodium carbonate = 0.0006 moles</u>

5 0
3 years ago
Hydrogen and helium cannot condense to gas at temperatures above water's freezing point. when planets would be made of gas?
kodGreya [7K]

Answer:

no.

Explanation:

only one planet would be made gas

is earth. and for what you mean like when

planet would be made of gas my answer is no

because theirs so gravity but im not the one

who's deciding and god is the one who's deciding

if when is the other planet having a gas

i know im wrong

8 0
3 years ago
How are archaeological finds dated?
Paladinen [302]

Explanation:

Archaeologists use that assumption, called the law of superposition, to help determine a relative chronology for the site itself. Then, they use contextual clues and absolute dating techniques to help point to the age of the artifacts found in each layer.

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3 years ago
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