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Aleksandr [31]
3 years ago
12

Pure substance definition is?

Chemistry
2 answers:
Vaselesa [24]3 years ago
8 0

Answer:

It is a sample of matter with both constant and definite composition

Explanation:

Lilit [14]3 years ago
6 0

Answer:

is a sample of matter with both definite and constant composition

Explanation:

a pure substance has a definite quantifier which cannot be changed

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Which of the following interactions would be the strongest?
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Write an equation for the reaction that takes place during the laboratory preparation of dry hydrogen​
olya-2409 [2.1K]

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Zn+2HCl→ZnCl2+H2

Explanation:

Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc.

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What is one property that water and oil do not share
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Hope this helps

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3 years ago
You have just completed assaying the change in absorbance for an enzyme. The initial absorbance was 0.022; the absorbance after
Hitman42 [59]

Answer:

The answer is 0.844/10 minutes

Explanation:

You have an enzyme that catalizes a reaction which gives a product that can be quantified by an absorbance measurement. The more reaction time, the more product quantity and higher absorbance.

The rate of the reaction is the change in products quantity per time unit. As you are using the absorbance as a measure of the product quantity, you can calculate the rate as the change in absorbance (ΔA) per time (in minutes) as follows:

rate= ΔA/time

rate= (final absorbance - initial absorbance) /minutes

rate= (0.444-0.022)/5 min

rate= 0.422/5 min

In 10 minutes will be :

rate= 0.844/10 min

Commonly, a rate is the relation between two quantities measured in different units. For example, the speed of a car is the change in meters (traveled distance) per time (m/s or km/h). For an enzyme, is the same (quantity of product/time).

4 0
3 years ago
Why is HBrO a weak acid
Juli2301 [7.4K]
Because it contains the weak base BrO which makes it a weak acid even though HBr is a strong acid
6 0
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