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otez555 [7]
3 years ago
5

Write the balanced chemical Equation for the following when they are heated ​

Chemistry
1 answer:
ale4655 [162]3 years ago
4 0

Answer:

i. Lead nitrate:

2Pb (NO3)2 Δ= 2PbO+4NO2+O2

ii. Potassium chlorate:

2KClO3 → 2KCl + 3O2↑

iii. clacium carbonate:

CaCO3 + 2HCl -> CaCl2 + CO2 + H2O

iv. cupric carbonate :

CuCO3 → CuO + CO2↑

Hope this helped

All the best!!

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The block in this illustration is floating in water, which has a density of 1.00 g/cm3 .What is a good estimate of the density o
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Answer : The density of the block is estimated to be, 0.30g/cm^3.

Explanation :

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Weight of the Block = Buoyant force exerted by water

\rho_o\times v\times g=\rho_w\times 30\%\text{ of volume of block}\times g

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6 0
3 years ago
The chemical formula H2O represents one molecule of water.
Gennadij [26K]

There is a total of three atoms present in the water (H₂O) molecule.

<h3>What is an atom?</h3>

An atom is the smallest particle of an element that may or may not be capable of independent existence.

<h3>What is a molecule?</h3>

A molecule is the smallest particle of an element or compound that can exist freely.

<h3>What is a subscript?</h3>

Subscripts are the numbers that come below after a symbol. They tell you the number of atoms of an element. If there is no subscript then it is understood that the subscript is 1.

<h3>How to calculate the number of atoms in a molecule?</h3>

For calculating the number of atoms in a molecule, add the subscripts of that molecule, and you will get the total atoms of it.

For example, in molecule C₂H₅O, there are 2 carbon atoms, 5 hydrogen atoms, and 1 oxygen atom.

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Learn more about atoms and molecules:

brainly.com/question/17869588

#SPJ1

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1 year ago
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