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2 years ago

Transcribe and translate the following DNA sequence:

Chemistry

1 answer:

MA_775_DIABLO [31]2 years ago

7 0

Answer:

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A bottle of the antiseptic hydrogen peroxide is labeled 3.0% (v/v). How many mL of hydrogen peroxide are in a 400 mL bottle of t

zepelin [54]

There are several ways of expressing concentration of solution. Few of them are listed below
1) mass percentage
2) volume percentage
3) Molarity
4) Normality
5) Molality

In most of the drugs, concentration is expressed either in terms of mass percentage or volume percentage. For, solid in liquid type systems, mass percentage is convenient way of expressing concentration, while for liquid in liquid type solutions, expressing concentration in terms of volume percentage is preferred. Present system is an example of liquid in liquid type solution

Here, concentration of H2O2 is given antiseptic = 3.0 % v/v

It implies that, 3ml H2O2 is present in 100 ml of solution

Thus, 400 ml of solution would contain 4 X 3 = 12 ml H2O2

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4 years ago

100 POINTS PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

dimulka [17.4K]

Answer:

i need this im struggling with my work

Explanation:

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3 years ago

Read 2 more answers

How many milliliters of 4.00 M NaOH are required to exactly neutralize 50.0 milliliters of a 2.00 M solution of HNO3 ?

kramer

Answer: The volume of $NaOH$ required is 25.0 ml

Explanation:

According to the neutralization law,

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1$ = basicity $HNO_3$ = 1

$M_1$ = molarity of $HNO_3$ solution = 2.00 M

$V_1$ = volume of $HNO_3$ solution = 50.0 ml

$n_2$ = acidity of $NaOH$ = 1

$M_1$ = molarity of $NaOH$ solution = 4.00 M

$V_1$ = volume of $NaOH$ solution = ?

Putting in the values we get:

$1\times 2.00\times 50.0=1\times 4.00\times V_2$

$V_2=25.0ml$

Therefore, volume of $NaOH$ required is 25.0 ml

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3 years ago

How many moles are in 432 g of Ba(NO3)2?

Artist 52 [7]

Answer:

432/261.337=1.65 moles

Explanation:

4 0

3 years ago

The image is a model of sulfuric acid that has a chemical formula of H2SO4. In 1-2 sentences, explain why creating models, like

JulijaS [17]

A model aids in visualizing a molecule and understanding its properties.

In chemistry, models of molecules give us an idea about the arrangement of atoms in the molecules. Usually, the arrangement of atoms in a molecules determines the kind of reactions that the molecule can undergo.

Models are three dimensional representations of what molecules look like. They help us to conceptualize the possible orientation of atoms and groups in the molecule.

Looking at the model of H2SO4, it becomes easier to understand the chemical and physical properties of the compound owing to the arrangement of atoms.

Learn more: brainly.com/question/12000914

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3 years ago