As per the given chemical formula- Na2CO3.10H2O, one mole of the chemical compound contains 13 moles of oxygen atoms. Hence
Number of moles of oxygen atoms in one mole of Na2CO3.10H2O = 13
number of moles of oxygen atoms in 0.2 moles of Na2CO3.10H2O = 13 X 0.2 = 2.6
Now, one mole of a substance contains 6.022 X 10^23 particles of the substance. Thus
number of atoms of oxygen in one mole of oxygen atom = 6.022 X 10^23
number of moles of oxygen atoms in 2.6 moles of oxygen atoms = 2.6 X 6.022 X 10^23 = 15.657 X 10^23
= 1.566 X 10^24
Thus, there are 1.566 X 10^24 atoms of oxygen in 0.2 moles of Na2CO3.10H2O.
4.7
Answer:
1. Which of these is not an example of a community? an individual who is raising money for cancer research THERE IS NO SUCH THING AS A ONE PERSON COMMUNITY
2. What are folkways? the social customs that teach an individual how to act within a group. FOLKWAYS ARE PART OF OUR CULTURE
3. Which term is associated with this scenario? The governor announces a new program that is designed to improve the algebra scores of ninth-grade students. institution THE ANNOUNCE APPLIES TO ALL HIGH SCHOOLS AND WAS MADE BY AN ELECTED AUTHORITY
4. Which of these statements is true? The family is the main source of socialization in a society. FAMILY IS THE BASIS OF SOCIETY
5. What are mores? the serious prohibitions against deviant behavior in a society that result in severe punishment MORES ARE VERY STRICT SOCIAL NORMS
6. What are laws? the protection of all people within a society EVERYBODY SHOULD BE EQUALLY PROTECTED UNDER THE LAW
Answer:
Researchers refer to DNA found in the cell's nucleus as nuclear DNA. An organism's complete set of nuclear DNA is called its genome. Besides the DNA located in the nucleus, humans and other complex organisms also have a small amount of DNA in cell structures known as mitochondria.
<h2>hσpє ít hєlpѕ uh</h2><h3>plz mαrk mє αѕ вrαínlíєѕt</h3>
Open system ( exchanges energy and matter with the surroundings)
Closed system ( exchanges only energy with the surroundings)
Isolated system ( does not exchange energy or matter)
Adiabatic system ( does not allow any heat to be transferred into or out of the system)
I believe the answer is D
