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lilavasa [31]
3 years ago
7

FORENSIC SCIENCE HELP

Chemistry
1 answer:
Annette [7]3 years ago
7 0
That is correct c
Explanation
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What mass of oxygen is needed to burn 4g of hydrogen, given the equation below
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32g of oxygen is required to burn 4g of hydrogen.

Define molecular mass.

A specific molecule's mass is expressed in daltons and is known as the molecular mass (m) (Da or u). Due to the varying isotopes of an element that they contain, multiple molecules of the same substance can have distinct molecular weights.

The total atomic mass of every atom in a molecule, calculated using a scale with hydrogen, carbon, nitrogen, and oxygen having atomic masses of 1, 12, 14, and 16, respectively. For instance, water has a molecular mass of 18 (2 + 16), which consists of two hydrogen atoms and one oxygen atom. known also as molecular weight.

In ,2H2+O2-----> 2H2O

H 2 molecules have a mass of 2 g/mol.

The molecular weight of oxygen is 32 g/mol.

When the chemical equation is balanced,

To totally react, 32 g of oxygen are needed for every 22=4 g of hydrogen.

To know more about molecular mass use link below:

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1 year ago
Which family on the periodic table has a filled outer energy level?
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3 years ago
If an unknown element displays many extremely strong metallic properties, where is it most likely to be located on the periodic
dalvyx [7]
It is placed on the far left. Hope I helped:)

3 0
3 years ago
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What is a neutralisation reaction? Give two examples.
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Explanation:

A neutralization is a type of double replacement reaction. a salt is the product of an acid-base reaction and is a much broader term then common table salt.

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(ii) H2SO4 + 2NH4OH ---> (NH4)2SO4 + 2HOH.

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Which expressions are equal to 675? 700 – 25 O 700 – 75 O 600 + 75 O 634 + 31 500 275​
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Answer:

30

Explanation:

6 0
2 years ago
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