Answer:
Dark matter also called baronic matter is the matter that makes up 27% of the universe.
In 1933 it was determined as that mass that cannot be seen, that is, the non-visible mass of outer space.
Dark matter also plays a central role in the formation of structures and the evolution of galaxies and has measurable effects on the anisotropy of cosmic microwave background radiation. The composition of this matter is unknown today.
The dark matter component has considerably more mass than the "visible" component of the Universe.
Explanation:
There are certain researchers who say that the appearance of dark matter was before the appearance of the big bang.
A relevant fact of this matter is that dark matter exerts gravity, and that gravity affects the movements of objects.
Despite the fact that nothing is known about its origin, astronomers have amply demonstrated that dark matter plays a determining role in the formation of galaxies and galactic clusters, which could not maintain their cohesion without its existence, but many doubt that it is the remainder / remnant or product of a big bang.
My number one tip is to STUDY! I know it sucks, but once you're in high school, it's going to become a part of your routine every single day. Even if you study right now, keep on doing it over and over and over. Trust me! It'll help. Also, get a tutor! Maybe someone you know is doing well and you could ask them to help, or you could ask a student who was in your class and passed. My number one advice is to just keep working hard. I get it; chemistry is HARD. You'll get there!
Answer: Matter is not destroyed, only changes forms.
Explanation: Take my answer with a grain of salt, I'm not a genius in this type of stuff but, the law of matter states that matter is not destroyed, only changes forms. This can be applied to photosynthesis because the plants take water and use it to make glucose to eat.
Again, I'm not genius so take my answer with a grain of salt but, hope it at least helps a little.
B. The independent variable
C. The linear values
D. The inverse values
Answer:the answer is a
Explanation:I’m 90% positive.
2. Points
How is hydrogen in heavy water different from hydrogen in normal water?
A. The hydrogen atoms in heavy water have a neutron in the nucleus,
doubling the mass.
B. The hydrogen atoms in heavy water have an extra proton in the
nucleus.
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C. The hydrogen in heavy water is radioactive.
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D. The heavy water molecules contain 3 hydrogen atoms instead of
Hydrogen in heavy water different from hydrogen in normal water as the hydrogen atoms in heavy water have a neutron in the nucleus,doubling the mass.
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
Learn more about atom,here:
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Answer:
Explanation:
Heavy water (deuterium oxide, 2
H
2O, D
2O) is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium (2
H or D, also known as heavy hydrogen), rather than the common hydrogen-1 isotope (1
H or H, also called protium) that makes up most of the hydrogen in normal water.[4] The presence of deuterium gives the water different nuclear properties, and the increase of mass gives it slightly different physical and chemical properties when compared to normal water. It can be used to create ice and snow at higher temperatures since its melting point is 3.82 C.