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WINSTONCH [101]

3 years ago

15

How is a mixture different from a compound?

2 answers:

kakasveta [241]3 years ago

6 0

Answer:

I think the answer is d. Each substance in a mixture keeps most of its characteristic properties.

never [62]3 years ago

3 0

Answer:

C

Explanation:

Compounds are formed because of chemical bonding between two elements and Mixtures are formed when substances are physically mixed with one another. A mixture contains two or more types of pure substances (elements or compounds) moved physically not chemically; they do not contain any atomic bonds.

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The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic.

aleksley [76]

Answer:

Concentration of hydrogen ion, $[H^+]=5.0118*10^{-6} M$

Explanation:

pH is defined as the negative logarithm of hydrogen ion's concentration.

The lower the value of pH, the higher the acidic the solution is.

The formula for pH can be written as:

$pH=-log[H^+]$

Given,

pH of the saliva of Marco = 5.3

To calculate: Hydrogen ion concentration in the saliva

Thus, applying in the formula as:

$pH=-log[H^+]$

$5.3=-log[H^+]$

So,

$log[H^+]=-5.3$

$[H^+]=10^{(-5.3)}$

$[H^+]=5.0118*10^{-6} M$

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shusha [124]

Answer:

$2C _{6}H _{14} + 19O _{2}→12CO _{2} +14H _{2} O$

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Answer:

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