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Ilia_Sergeevich [38]
3 years ago
14

Since a element has a pH number of 7, meaning it is ______. That element can be classified as neither a ____ or a _____.

Chemistry
2 answers:
Nana76 [90]3 years ago
6 0
- - Since a element has a pH number of 7, meaning it is neutral. That element can be classified as neither a acid or a base.
- - No this is not balanced.
- - This is because its no balanced considering the o has 6 sides and 4 has one.
- - Because of this it is not true based on the com (conversion of mass) This law was made by Antoine Lavoisier and using his law I was able to know that it was not a balanced equation. 


Lilit [14]3 years ago
4 0
If a number has a pH of 7, it is neutral, therefore, one blank is neutral. 

1. Neutral

Therefore, the element is not an acid or a base.

2. Acid, Base

That is NOT a balanced equation because:

c=4    o=2
c=4     o = 6

Not balanced, o has 6 and one side it has 4. It contradicts the Law of conversation of mass. 
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How many molecules (not moles) of NH3 are produced from 5.25x10^-4 g of H2?
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Explanation:

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8 0
3 years ago
A student is determining the density of an unknown metal with a mass of 32.56 g. The student partially fills a graduated cylinde
xenn [34]

Answer:

The metal is Tin (Sn)

Explanation:

The following data were obtained from the question:

Mass of metal = 32.56 g

Volume of water = 14.78 mL

Volume of water + metal = 20.44 mL

Next, we shall determine the volume of the metal. This is illustrated below:

Volume of water = 14.78 mL

Volume of water + metal = 20.44 mL

Volume of metal =..?

Volume of metal = (Volume of water + metal) – (Volume of water )

Volume of metal = 20.44 – 14.78

Volume of metal = 5.66mL

Next, we shall determine the density of the metal.

Density of a substance is defined as the mass of the substance per unit volume of the substance. Mathematically, the density of a substance is expressed as:

Density = Mass / volume

With the above formula, we can obtain the density of the metal as follow:

Mass of metal = 32.56 g

Volume of metal = 5.66mL

Density =.?

Density = Mass /volume

Density = 32.56g/5.66mL

Density of the metal = 5.75g/mL

Comparing the density of the metal with standard density of elements, the metal is Tin (Sn)

4 0
3 years ago
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