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damaskus [11]
3 years ago
8

Your pupil opens and closes automatically in response to light.what part of your nervous system controls this response

Chemistry
2 answers:
solong [7]3 years ago
6 0
The brain controls it
Dahasolnce [82]3 years ago
3 0
The sympathetic nervous system control's the pupils activities.
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How many moles of H2O are produced when 64.0 g C2H2 burns in oxygen
Gnoma [55]
The balanced chemical reaction will be: 

C2H2 + 5/2O2 = 2CO2 + H2O

We are given the amount of C2H2 being burned. This will be our starting point.

64.0 g C2H2 (1 mol C2H2 / 26.02 g C2H2) (1 mol H2O/1mol C2H2) ( 18.02 g H2O/1mol H2O) = 44.32 g H2O.

Thus, the answer is 44.32 g H2O.
6 0
3 years ago
Discuss the pros and cons of the various methods that have been proposed to regulate or control global warming?
dimulka [17.4K]
For example, a method that has been used to regulate or control global warming is planting trees. The pros of planting trees is they serve as an absorber of carbon dioxide which helps the ozone layer get protected by the oxygen trees produce and they also regulate the temperature in the atmosphere although the cons are these trees can also catch fire eaaily due to the rising temperature in the atmosphere which can make them less effective in regulating the warming of the globe.
3 0
3 years ago
6.
frez [133]

Answer:

Ni^2+

Explanation:

The following data were obtained from the question:

Proton = 28

Electron = 26

Neutron = 34

Next, we shall determine the atomic number of the element.

Atomic number of an element is simply defined as the number of protons in the atom of an element.

Thus,

Atomic number = proton number

Proton = 28

Atomic number = proton number = 28

Atomic number = 28

Therefore, the element is Nickel since no two elements have the same atomic number.

Finally, we shall determine the charge on the Nickel atom as follow:

Proton = 28

Electron = 26

Charge on atom =

Charge on atom = Proton – Electron

Charge on atom = 28 – 26

Charge on atom = +2

Therefore, we can represent the Particle as Ni^2+

4 0
3 years ago
How many moles are found in a 100.0 g sample of CuF2?
labwork [276]
You can solve this by dividing the mass by the molar mass. The molar mass of CuF2 is about 101.5 g/mol. Therefore there are 100.0/101.5 = 0.985 mol.
3 0
4 years ago
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Wha exampleof matter
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Matter is anything & everything around you.

A chair,baseball,person,shoes,desk,etc are all made of matter

8 0
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