<span>You can answer this question by getting the atomic number and atomic mass of Oxygen from a periodic table. There you will find that the atomic number is 8, that means, by definition, that it has 8 protons. This is, because atomic number is defined as the number of protons of an element. Given that the atom is neutral, that implies that the atoms have the same number of electrons than protons. So you already know that the oxygen atoms has 8 protons and 8 electrons. The number of neutrons can vary, which is what defines the isotopes. Given that the atomic mass of oxygen is 15.999, that means that most atoms of oxygen has 8 neutrons (8 protons +8 neutrons = 16 atomic mass). But you can not be sure that a specific atom of oxygen has 8 neutrons, nevertheless, given that the other options are discarded (because they do not have 8 protons and 8 electrons), the only correct answer is the option A. 8 protons, 8 electrons, and 8 neutrons.</span>
Answer:Water contains almost one thousand times more matter than the same volume of air would, therefore it is denser. ... If 500 mL of a liquid has a density of 1.11 g/mL, what is its mass? ... Density is the mass per unit of volume of a substance. ... A block of platinum with a mass of 4,290 kilograms has a volume of .2 cubic meters.
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Alumminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+H2SO4-->Al2(SO4)+6H2O.
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Answer: ?
Explanation: I translated this and It makes no sense.
Tôi đã dịch điều này và nó không có ý nghĩa.
Based on exposure time and place, the Sun's radiation may have harmful or beneficial effects.
<h3>What is solar radiation?</h3>
Solar radiation refers to the radiation from the Sun in the form heat, light and other forms of radiation.
The radiation from the Sun may have harmful or beneficial effects.
The effects of the Sun's radiation can be classified as BE, HE or SP as follows:
- BE- UV rays can help treat some health conditions. It creates Vitamin D
- SP- Use sunblock lotion with SPF 15 during hot days.
- BE- With the presence of sunlight, farmers can dry their crops.
- HE- UV rays can damage the tissue in your eyes.
- BE- Research says that sunlight helps moods.
- HE- Too much exposure from the sun can cause skin cancer.
- SP- Use sunglasses when you stay under the sun.
- SP- Wear a wide- brimmed hat on sunny days.
- BE- Humans can do recreational activities on a sunny day.
- SP- Wear sunglasses that filter UV light.
- HE- Prolonged exposure to the sun’s heat makes your skin age faster than normal.
- HE- Too much heat from the sun can cause heat stroke and loss of water.
- BE- Sunlight helps strengthen your immune system.
- BE- The vitamin D made thanks to the sun plays a big role in bone health.
- SP- Avoid sun in the middle of the day, from about 10 a.m. to 3 p.m.
Learn more about Sun's radiation at: brainly.com/question/921530
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