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boyakko [2]
2 years ago
7

What is the colour change that would be observed if carbon dioxide gas were bubbled into a mixture of calcium oxide, bromothymol

blue, and water?
Chemistry
1 answer:
olya-2409 [2.1K]2 years ago
8 0
Bromothymol blue is acid base indicator which has pH intervals 6 - 7.6 and its two colors are yellow in acid and blue in basic.
The pH of CaO is about 11.5 to 12.5 this will make the indicator has blue color at the beginning.
By bubbling CO₂ to CaO this leads to formation of CaCO₃ which also basic (pH about 9.5 - 10) so the color of indicator remains blue
No color change of the indicator will observed (remains blue)
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Orlov [11]

The final temperature of the sample of gas is 689.65 Kelvin.

<h3>What is the relation between temperature and pressure?</h3>

Relation between the temperature and pressure will be represented by the ideal gas equation PV = nRT, and for this question required equation is:

P₁/T₁ = P₂/T₂, where
P₁ & T₁ are the pressure and temperature of the initial sample.

P₂ & T₂ are the pressure and temperature of the final sample.

Pressure is in mmHg and on putting values from the question on the above equation, we get

T₂ = (810)(390.8) / (760) = 416.5 degree C = 689.65K

Hence required temperature of the sample is 689.65K.

To know more about ideal gas equation, visit the below link:
brainly.com/question/555495

#SPJ1

7 0
2 years ago
What does a red shift indicate about a galaxy?
Ad libitum [116K]
The only cause we know of that could shift the spectrum of a source toward longer wavelengths isthe source moving away from us. That's how we interpret the red shift when we see it, and that's where the whole idea of the expanding universe comes from. But ... just like gravity and the Earth going around the sun ... it can't be proved, so it's "only a theory".
6 0
2 years ago
Read 2 more answers
How many atoms of carbon are found in a 30.0 gram sample of the element?
saveliy_v [14]

Answer:

1.50 × 10²⁴ atoms C

Explanation:

Step 1: Define

Molar mass of C - 12.01 g/mol

Avagadro's Number: 6.02 × 10²³ atoms, molecules, formula units, etc.

Step 2: Use Dimensional Analysis

30.0 \hspace{3} g \hspace{3} C(\frac{1 \hspace{3} mol \hspace{3} C}{12.01 \hspace{3} g \hspace{3} C} )(\frac{6.02(10)^{23} \hspace{3} atoms \hspace{3} C}{1 \hspace{3} mol \hspace{3} C} ) = 1.50375 × 10²⁴ atoms C

Step 3: Simplify

We are given 3 sig figs.

1.50375 × 10²⁴ atoms C ≈ 1.50 × 10²⁴ atoms C

3 0
3 years ago
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nadezda [96]
4)
a) Natural selection will work negatively against rabbits that only eat berries as the drought is preventing berries from growing. It wont have any negative impact on rabbits that only eat grass as the grass is still surviving.

b) The statement ‘population has variations’ is backed up by the fact that the rabbits eat different things. They aren’t all the same. The statement ‘some variations are favorable’ is backed up by the fact that the rabbits that only eat grass are able to survive the drought. Their variation in eating grass instead of berries let’s them live. The statement ‘a population will change over time’ is backed up by the fact that the rabbits that only eat berries will die out. This will not only change the size of the population but going forward will create a population that has more rabbits that eat only grass on account of natural selection.
7 0
3 years ago
What name would you give to an orange smelling ester formed by adding octanol to acetic acid
Iteru [2.4K]

The name of the ester is octyl acetate.

Explanation:

Octanol will react with the acetic acid to form octyl acetate. You may find the structure of the compounds in the attached picture.

Learn more about:

structure of organic compounds

brainly.com/question/14122960

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4 0
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