Answer:
Explanation:
It is easier if you convert the kelvin temperature into Celsius degrees:
- ºC = T - 273.15 = 150 - 273.15 = -123.15ºC
Now, you know that that is a very cold temperature. Thus, may be the oxygen is not gas any more but it changed to liquid . . . or solid?
You must search for the boiling point and melting (freezing) point of oxygen in tables or the internet. At standard pressure (about 1 atm) they are:
- Melting point: −218.79 °C,
- Boiling point: −182.962 °C
That means that:
- below -218.79ºC oxygen is solid (not our case).
- between -218.79ºC and -182.962ºC oxygen is liquid (not our case)
- over -182.962ºC oxygen is a gas. This is our case, because -123.15ºC is a higher temperature than -182.962ºC.
Hence, <em>the state of matter of oxygen at 150K</em>, and standard pressure, is gas.
I’m assuming this means mass percent, because that is typical of these types of problems. The substance with the highest mass percent of Br would be the one where the molar mass of Br over the molar mass mass of the substance has the highest value. This would require the other component of the substance to have as small of a molar mass as possible, and by inspection of the periodic table, it is evident that this would be lithium, which has a molar mass of 6.941 amu rather than potassium’s 39.10 or cesium’s 132.91. This means that the correct answer should be C. LiBr.
Answer:
A chemical reaction happens when substances break apart or combine to form one or more new substances.
Explanation:
hope its right.
This site is used for learning, so to give a better understanding, here is a walkthrough.
So let's create a question:
Can a molecule have a dipole moment if it has no polar covalent bonds?
Here's the answer to that question:
Even though a molecule contains only one element, it can have a persistent dipole moment. The most common example is ozone (trioxygen). It is curved and has a partial positive charge on the center oxygen atom (similar to sulfur dichloride).
Permanent dipole moments are caused by an unequal, directed charge distribution within a molecule, not by changes in electronegativity. Such charge distributions are frequently caused by so-called "polar covalent bonds," which occur between atoms with markedly varying electronegativity. However, they are not the sole explanation.
So using this information, try to answer this question on your own.
#SPJ2
Answer:
Hexane is a 6-carbon hydrocarbon.
Cyclopentyl is a 5-carbon, hydrocarbon ring.
The 1- indicates that the cyclopentyl is attached to the first carbon in hexane.
Two ways of drawing the structure of 1-cyclopentylhexane are below: