Atoms are composed of subtomatic particles called

A chemical equation does not give information about what

Lana71 [14]

A chemical equation does not give information about the following:

It usually does not give the "state of the substances". There are three states: Solid(s), liquid(q) and gas(vap).
The chemical equation does not show whether it is complete or incomplete.
The "speed of the reaction" is not mentioned.
The "concentration of the substance" whether it is diluted or concentrated is not mentioned.
The "rate of the reaction", temperature, catalyst, pressure etc is not mentioned. These can be mentioned "above or below the arrow".

8 0

2 years ago

Find the height of a triangle that has an area of 30 square units and a base measuring 12 units.

Gala2k [10]

The answer is b. 5 units

5 0

2 years ago

Arbon dioxide is dissolved in blood (ph 7.5) to form a mixture of carbonic acid and bicarbonate. Part a neglecting free co2, wha

Aleks04 [339]

Answer : The fraction of carbonic acid present in the blood is 5.95%

Explanation :

The mixture consists of carbonic acid ( H₂CO₃) and bicarbonate ion ( HCO₃⁻). This represents a mixture of weak acid and its conjugate which is a buffer.

The pH of a buffer is calculated using Henderson equation which is given below.

$pH = pKa + log \frac{[Base]}{[Acid]}$

We have been given,

pH = 7.5

pKa of carbonic acid = 6.3

Let us plug in the values in Henderson equation to find the ratio Base/Acid.

$7.5 = 6.3 + log \frac{[base]}{[acid]}$

$1.2 = log \frac{[base]}{[acid]}$

$\frac{[Base]}{[Acid]} = 10^{1.2}$

$\frac{[Base]}{[Acid]} = 15.8$

$[Base] = 15.8 \times [Acid]$

The total of mole fraction of acid and base is 1. Therefore we have,

$[Acid] + [Base] = 1$

But Base = 15.8 x [Acid]. Let us plug in this value in above equation.

$[Acid] + 15.8 \times [Acid] = 1$

$16.8 [Acid] = 1$

$[Acid] = \frac{1}{16.8}$

$[Acid] = 0.0595$

[Acid] = 0.0595 x 100 = 5.95 %

The fraction of carbonic acid present in the blood is 5.95%

4 0

2 years ago

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which of the following describes something an engineer would probably do first when developing new technology meant to reduce oc

JulijaS [17]

Answer:

Option B. is the right answer.

Explanation:

Before developing a new technology, an engineer has to evaluate the advantages and disadvantages of the chemical used in order to clean water bodies. If the chemical has more disadvantages as compared to advantages, so its usage will be avoided while if the chemical does not harm the marine organisms of the ocean so it can be used for the purpose of cleaning. So we can say that first the engineer has to study the chemicals.

3 0

2 years ago

There is a limited amount of matter on Earth.

riadik2000 [5.3K]

I'm not sure where the question is here. Yes it is true that there is a limited amount of matter on Earth...

8 0

3 years ago

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