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lilavasa [31]
3 years ago
6

All of the following are reasons why astronomers have difficulty looking at distant stars except:

Chemistry
1 answer:
OleMash [197]3 years ago
4 0

Answer:

B. They don't understand how red shift affects stars.

Explanation:

Astronomers face difficulty in observing distant stars because they are so far that they are easily viewed by telescope. Light pollution is major concern in present times . There is very less window present for observation. The dim light from the distance stars also gets distorted due to atmosphere and effects astronomical seeing.

Astronomers are aware about the Doppler effect for light that is the redshift effect on the star light. It is not a difficulty for astronomers.

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The total number of each element is not changed during a chemical reaction
Paha777 [63]

false all element when they are combined eachother thier valance number will change

the combination of oxygen and aluminum gives us Al2O3 see even the numbers are changing thank you if you have a comment you can write

3 0
3 years ago
Suppose there is 0.63 g of HNO3 per 100 mL of a particular solution. What is the concentration of the HNO3 solution in moles per
Vadim26 [7]

Answer:

There are 0.09996826 moles per liter of the solution.

Explanation:

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Convert grams to moles

0.63 grams/ 63.02= 0.009996826

Convert mL to L and place under moles (mol/L)

100mL=0.1 L

0.009996826/0.1= 0.09996826 mol/L

4 0
3 years ago
Is freshwater a mixture?
dem82 [27]

Answer:

No

Explanation:

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7 0
3 years ago
Given the formula: what is a chemical name of this compound? propane propanal propanol propanone
katrin [286]
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7 0
4 years ago
What does photosynthesis mean?
AleksandrR [38]
Photosynthesis is the ability for a plant to turn light into energy, thus feeding it
6 0
3 years ago
Read 2 more answers
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