Compared to a 2.0 M aqueous solution of NaCl at 1 atmosphere, a 3.0 M aqueous solution of NaCl at 1 atmosphere has a(1) lower boiling point and a higher freezing point
(2) lower boiling point and a lower freezing point
(3) higher boiling point and a higher freezing point
(4) higher boiling point and a lower freezing point
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Which of the following is true in regard to ions?A. Ions can only carry positive charges. B. An ionized atom has a number of protons that is unequal to the number of electrons. C. A cation will hold a positive charge if it gains one or more electrons. D. Losing one or more electrons will turn an atom into an anion.
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(1) argon (3) chlorine
(2) bromine (4) sulfur
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Answer: Option (2) is the correct answer.
Explanation:
STP means standard temperature and pressure.
At STP chlorine exists as a gas, sulfur exists as a solid and argon also exists as a gas.
Whereas bromine exists as a liquid at STP.
Thus, we can conclude that out of the given options bromine is the element which exists as a liquid at STP.
The element that is a liquid at standard temperature and pressure (STP) is bromine (Br). Therefore, option 2 is correct.
Bromine is the only element among the options given that is a liquid at STP. It is a reddish-brown liquid with a strong and unpleasant odor. Bromine is a halogen and exists as diatomic molecules (Br₂).
It has a boiling point of 58.8°C (137.8°F) and a melting point of -7.2°C (19.0°F). Bromine is significantly more reactive than argon but less reactive than chlorine and sulfur.
Argon (Ar) is a noble gas and exists as a colorless and odorless gas at STP. Chlorine (Cl) is a greenish-yellow gas at STP. Sulfur (S) is a solid at STP and melts at a relatively high temperature.
To learn more about the element, follow the link:
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The highly reactive gas that was probably absent from the Earth's primitive atmosphere is oxygen.
The atmosphere refers to the thin layer of gas above the earth's crust. This thin layer of gases is composed of a mixture of gases. The earth's primitive form also had an atmosphere.
However, we must recall that in its primitive form the earth was mostly under reducing conditions and there was no oxygen. However, photosynthesis by plants increased the oxygen content of the earth.
Learn more: brainly.com/question/165414
I hope that helps.
2) Why doesn't the sun make the wheel move?
solve these to and you get picked brainlley
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Answer:
there's no way to answer that
b. the number of electrons
c. period 3
d. the third sub level e. Li
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Answer: b. the number of electrons
Explanation:
1. 4 is the principal quantum number which describes the size of the orbital. It is represented by n.
2. The electrons are present in p sub shell also called as azimuthal quantum Number:This quantum number describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For p orbital, l=1.
3. The p subshell contains 3 electrons.
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When aligned a certain way the the gravitational pulls basically share and add on to each other creating tidal waves.
An example of a certain alignment would be spring tides, which happen during a New or Full moon.
Examples: Boat sailors must watch out for tides and make sure to plan their sailing journeys according to the tide. They don't want to be caught against a tide, especially small board sailors.
Also fisherman keep note of tides since some sea life rely on tides for survival and feeding or some fish simply follow the movement of the tides. Fisherman use tides as an indication of when it'd be best to go fishing.