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dimulka [17.4K]
9 months ago
5

The size of early universe was...

Chemistry
1 answer:
joja [24]9 months ago
6 0

Answer: A

Explanation:

The universe was infinite and is still infinite

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When the pressure of a gas decreases, which quantity will increase, assuming all other variables are held constant?
frosja888 [35]

I don't think the answer is in one of the options- unless I am reading it wrong and there is a 'V' option.

The volume (V) of gas increases when the pressure of the gas decreases assuming all the other variables are held constant.

I hope this helps!

7 0
3 years ago
What is the molecular weight for H3PO4
Dominik [7]
<span>H</span>₃<span>PO</span>₄<span> - Phosphoric Acid :

H</span>₃<span>PO</span>₄<span> = 1.0 * 3 + 31.0 + 16.0 * 4 = 98.0 g/mol

hope this helps!</span>
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3 years ago
Which of the following best explains how an organism's phenotypic traits increase the chances for a species to survive?
andreyandreev [35.5K]

Answer:

A

An organism’s phenotype may influence its ability to find food, and also might affect the organism’s ability to reproduce and pass on favorable alleles.

B.

An organism’s phenotype may influence its ability to produce chromosomes and pass those chromosomes to future generations

C.

An organism’s phenotype may influence its ability to turn on certiain genes necessary for survival.

D.

An organism’s phenotype is not connected with the chances for a species to survive.

Explanation:

4 0
2 years ago
Read 2 more answers
Calculate the concentration of an anthracene solution which produced a fluorescence intensity ( I ) of 775 when the irradiance o
Kay [80]

Answer:

The concentration of an anthracene solution is  c = 3.560 *10^{-5}M

Explanation:

From the question we are told that

       The incident beam P_o is =1532

         The fluorescence intensity is  I = 775

          The length of the medium is b = 0.875 cm

         The molar extinction coefficient is  \epsilon = 9.5 *10^3 M^{-1} cm^{-1}

          The proportionality  constant k = 0.30

 

According to Lambert law the Absorbance of the anthracene solution is mathematically represented as

              A = log (I_O/I)

Where I_o =P_o

and A  is the  Absorbance

    Substituting value

                A = log( (1532)/(775))

                  =0.2960

Generally beers law can be represented mathematically as

                   A = \epsilon c l

where c is the concentration of an anthracene solution

Making c the subject of the formula

          c = \frac{A}{cl}

Substituting  0.875 cm for length = b ,

We have  

            c = \frac{0.2960}{9.5*10^{3} * 0.875}

              c = 3.560 *10^{-5}M

             

6 0
3 years ago
Vinegar is a dilute solution of acetic acid (CH 3 COOH) , a density of .81g / m * L and freezes at approximately 2has a sour tas
ELEN [110]

Answer:

Vinegar consists of acetic acid (CH3COOH), water and trace amounts of other chemicals, which may include flavorings. The concentration of the acetic acid is variable. Distilled vinegar contains 5-8% acetic acid. Spirit of vinegar is a stronger form of vinegar that contains 5-20% acetic acid.Jun 4, 2019

Explanation:does this answer your question?

8 0
2 years ago
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