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likoan [24]
3 years ago
10

Where is the Center of the Universe?

Chemistry
2 answers:
Alex17521 [72]3 years ago
8 0

Everywhere

Hope that helps and good luck

~May

yanalaym [24]3 years ago
3 0

There is no center of the universe, the universe has been expanding.

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1. The maximum recommended amount of citric acid (H3C6H5O7; the 3 hydrogens listed first are the acidic hydrogens – the only hyd
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The density has been given as the mass of the substance per volume of the solution. The mass of citric acid in the bottle has been 1.22 grams.

<h3>What is percent mass?</h3>

Percent mass can be given as the mass of substance in the total mass of the solution.

The volume of the face serum has been 250 mL, and the density is 0.979 g/mL.

The mass of face serum in the bottle has been:

\rm Density=\dfrac{Mass}{Volume}\\ 0.979\;g/mL=\dfrac{Mass}{250\;mL}\\ Mass=244.75\;g

The total mass of face serum has been 244.75 grams.

The percent mass of citric acid in face serum is 0.5%. This states the presence of 0.5-gram citric acids in 100 grams sample.

The mass of citric acid in the face serum sample is given as:

\rm 100\;gram\;sample=0.5\;g\;H_3C_6H_5O_7\\\\244.75\;grams\;sample=\dfrac{0.5}{100}\;\times\;244.75\;grams\; H_3C_6H_5O_7\\\\244.75\;grams\;sample=1.22\;grams\;H_3C_6H_5O_7

The mass of citric acid present in 250 mL serum sample has been 1.22 grams.

Learn more about percent mass, here:

brainly.com/question/5394922

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2 years ago
A motorcyclist completes a journey at an average speed of 65 mph
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227.5

Hope this helps :)
8 0
3 years ago
The group that does not receive a treatment during an experiment is called the?
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5 0
3 years ago
The atomic number of an element is 71. is this element diamagnetic or paramagnetic?
Mrrafil [7]
The  element  with atomic  number  71(lutetium) is  paramagnetic

  This  is  because  all  its   electrons   is  not  paired .  lutetium  has  electron  configuration  of  (Xe) 4f^14 5d^1 6S^2
Its 5d   sub shell  is  not  paired  since  the  d  sub shell  can  accommodate  a total  of  10   electrons  hence  lutetium  is  paramagnetic
5 0
3 years ago
Read 2 more answers
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