200° Celsius
300° Celsius
400° Celsius
Boiling point is at 200° Celsius
Explanation:
Matter exists in three states:
- Solid state: the molecules of the element are fixed in their place and strongly bonded to each other - therefore, they can only vibrate around their fixed position.
- Liquid state: the molecules of the element are free to slide past each other - however, there are still intermolecular forces that keep them close to each other
Gas state: the molecules of the element are completely free to move far from each other
Evaporation is the process that occurs when a substance changes from liquid to gas state. This process occurs when the temperature of the substance reaches its boiling point.
In the graph given in this problem (find it in attachment), we observe that:
- At first, the temperature increases up to 50 Celsius; this is the solid state
- Then the temperature stops increasing --> this is the transition of phase from solid to liquid (melting), which occurs at a constant temperature of 50 Celsius (melting point)
- Then, the temperature increases again up to 200 Celsius (liquid state)
- Then the temperature stops increasing again --> this is the transition of phase from liquid to gas (evaporation), which occurs at a constant temperature of 200 Celsius, which is therefore the boiling point
- Then, the temperature increases again (gas state)
Therefore, the boiling point of the substance in this problem is
200° Celsius
Learn more about temperature:
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Answer:
B
Explanation:
200 degrees Celcius.
B. The heavy caffeine molecules are more likely to fall apart than the lighter CuCl2 molecules.
C. The metallic bonds in copper chloride are stronger than the ionic bonds in caffeine.
D. Caffeine is a network solid and has a low melting point like other network solids.
Option-A " The intermolecular forces holding the caffeine molecules together are weaker than the ionic bonds in CuCl₂ ".
There are two types of interactions among the atoms and molecules. One are known as intramolecular forces while the other are known as intermolecular forces.
Examples of Intramolecular forces are ionic bonds and covalent bonds e.t.c. while examples of intermolecular forces are hydrogen bond interactions, dipole-dipole interactions e.t.c.
Remember that intramolecular forces ar far more greater in strength than the intermolecular forces. Hence, in given statement the interactions between Caffeine molecules are intermolecular forces while, that between Cu and Cl ions in CuCl₂ are intramolecular forces.
b.it will travel striaight line but eventually slow down
c.it will continue to speed up forever
d.it will slow down and turn
2.a car accelerates down the road .what is the reaction to the tires pushing on the road?
a.the car in the tires moving the car
b.the masses of the car pushing on the tires
c.the road pushing on the tires
d.the road moving away from the tires
What's the formula for this problem?
For this problem, we use the following expression:
Speed = distance / time
Distance = Speed * timeSince the problem tells us the speed of the plates, we know that
Speed_plates = 6.0 cm/year
Which is equal to
Speed_plates = 6.0 cm/365 days = 6.0 cm/(365*24 hours)
Speed_plates = 6.0 cm/(365*24*60 minutes)
Speed_plates = 6.0 cm/(365*24*60*60 seconds)
Speed_plates = 190.258 E -9 cm / s
We multiply by 25, to get the distance traveled after 25 seconds
Distance traveled = 4.756 E-6 cm