How much heat is needed to warm 250g of water from 22℃ to 98℃?
Answer:
Thus, the required heat is 79kJ 79 k J .
Explanation:
i think its the right bottem one
Name the following cycloalkane:
CH2CH2CH2CH3
A. butylcyclohexane
B. butylcyclopentane
C. propylcyclohexane
Answer:
The answer for this question is A. butylcyclohexane
Explanation:
Choose letter A
You welcome have a nice day.
Name of the given compound is butyl cyclohexane.
What are cyclo alkanes?Cyclo alkanes are those organic compounds in which alkanes are present in the cyclic form.
In the nomenclature of cyclo alkane, name of the substitute is put before the name of the main ring. In the given structure number of carbons in ring is 6 so that given cycloalkane is cyclohexane and butyl group is attached as substitute. So name of the given compound is butyl cyclohexane.
Butyl cyclopentane is wrong because 6 carbons are present in ring.Propylcyclohexane is also wrong because 4 carbons are attached in the ring.Hence name of the compound is butyl cyclohexane.
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Fe2O3 (s) + 2 Al (s) ---> 3 Fe (l) + Al2O3 (s) Based on the thermite reaction, how much aluminum oxide (Al2O3) is formed from 8.0 grams of aluminum (Al)?
Answer:
15.3 g
Explanation:
Fe₂O₃ (s) + 2Al (s) → 3Fe (l) + Al₂O₃ (s)First we convert 8.0 grams of aluminum into moles, using its molar mass:
8.0 g Al ÷ 27 g/mol = 0.30 mol AlThen we convert 0.30 moles of aluminum into moles of aluminum oxide, using the stoichiometric coefficients:
0.30 mol Al * [tex]\frac{1molAl_2O_3}{2molAl}[/tex] = 0.15 mol Al₂O₃Finally we convert 0.15 moles of Al₂O₃ into grams, using its molar mass:
0.15 mol Al₂O₃ * 102 g/mol = 15.3 g Al₂O₃2
The current temperature, wind, precipitation and
other atmospheric conditions at any given time describes what?
A Controls
B Climate
C Tropics
D Weather
Observa los dibujos cada uno representa una sustancia. Cada bolita representa un simboliza un átomo de un elemento.
Answer:
A: Elemento
B: Elemento
C: Elemento
D: Compuesto
E: Elemento
F: Compuesto
G: Compuesto
H: Compuesto
I: Elemento
J: Compuesto
K: Elemento
L: Elemento
Se adjunta la imagen con los dibujos.
Explanation:
Un elemento químico está compuesto por átomos específicos, por ejemplo el oxígeno, el helio, el sodio, cloro. Por otro lado, un compuesto químico es la combinación de dos o más elementos químicos diferentes, por ejemplo, cloruro de sodio, que forma por la combinación de sodio y cloro (NaCl), dióxido de carbono, que se forma por la unión de carbono con tres átomos de oxígeno (CO₃), agua que se forma por la combinación de dos átomos de hidrógeno con un átomo de oxígeno(H₂O), etc.
Which element would you predict to have the highest first ionization energy? Why?
a) neon or carbon
b) fluorine or francium
c) beryllium or strontium
d) iodine or fluorine
A doctor tapes a patients knees with a hammer to test the reflex which can provide information about the condition of the _____
Answer:
lol this is what you get for not answering my question and stealing points
Explanation:
A gas in the form of Bubbles is released is it a chemical change or a physical change
Answer:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. Another clue that a chemical change has occurred is the formation of a solid.
Explanation:
Calculate the number of moles in 3.440 x 10^35 formula units of RbF. (Molar mass of RbF is 104.47g/mol).
Two students pull a box with force of 100 N to the left and 200 N to the right.
What is the net force and direction in which the box moved?
Answer:
net force is 100 N and direction is right
Explanation:
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What happens when something reaches absolute zero?
Question 5 options:
1)There are no particles left in it
2)The particles completely stop moving
3)The particles are vibrating at a rate greater than the speed of light
4)There is no such thing as absolute zero
Answer:
There's no such thing as absolute zero
Answer:
I think number 1 but if wrong report me
How
much heat must be added to
85g
of water
to raise its temperature 225?
Answer:
One of water's most significant properties is that it takes a lot of heat to it to make it get hot. Precisely, water has to absorb 4,184 Joules of heat (1 calorie) for the temperature of one kilogram of water to increase 1°C.
Explanation:
A 12.0 g sample of O2gas is inside a rigid, metal container with a volume of 5.00 L at 3.00 atm of pressure. What is the temperature of the gas?
is butanoic acid a hydrocarbon?
How many grams of hydrogen reacts with 32 g of oxygen to produce 34 g of hydrogen peroxide
Answer:
2 grams.
Explanation:
H2 + O2 ---> H2O2
Using molar masses:
2*1 g hydrogen reacts with 2*16 g oxygen.
so 2g H2 reacts with 32 g O2.
What’s the answer? I need an answer as soon as possible please!
Answer:
1, 1, 2
Explanation:
1, 1, 2
The battery gets it's energy from the
Q3 - Complete the word equation *
1 point
Bromine +
Chlorine
Bromide +
Potassium
Chloride
Bromine +
Potassium
Chloride
Hydrogen
bromide +
Potassium
Chloride
Chlorine +
Potassium
Bromide ->
OPEN ENDED QUESTION A chemistry student has a 5.001 g of CaCl2. How many moles of CaCl2 does the student have? (mm CaCl2 = 110.98 g)
Answer:
0.04506 mol
Explanation:
For this problem, you need to convert grams to moles. To do this, you need the molar mass, which is given. Divide the mass by the molar mass to find the moles you have.
(5.001 g)/(110.98 g/mol) = 0.04506 mol
Frost forming on a car's windshield is a chemical change
True or false
Answer:
True
Explanation:
The reason why is because frost is a result of a chemical reaction
Can anybody do this?
Answer:this should be c
Explanation:
Which formula represents a hydrate compound?
Answer:
H2O2
Explanation:
There's hydrogen and ox in the formula to represent
बा
If OPPOSITE poles (N and S) of
a magnet are placed near
each other, what happens?
Type answer here
Answer:
They attract each other
Explanation:
A magnet has two poles;
North pole and south pole
When two opposite poles are placed close to each other, they attract each other. The short rule is opposite opes attract.
When two like poles are placed close to each other, they repel each other. The short rule is like poles repel.
I need help with energy
Answer:
Explanation:
The correct answer is
energy resulting from the flow of charged particles , such as electrons or ions.
hope it helps :)
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PLS HURRY MY TEST IS TIMED
Currently, some commercially available explosives are tagged with traceable
radioactive isotopes
chemical markers
cell-signal components
acetone compounds
Answer:chemical markers
Explanation:
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Fish can be killed by a sudden increase in water
A. Temperature
B. Level
C. Density
D. Color
Answer:
i think it is A
Explanation:
Answer:
Explanation:
A. Most definitly Temperature!
The process of water changing from a liquid to solid is called?
Answer:
freezing
Explanation:
When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt. ... The reverse of the melting process is called freezing. Liquid water freezes and becomes solid ice when the molecules lose energy.
hope it becomes helpful to you ☺️☺️
good luck
Why do some animals defend their territory after they have mated
and reproduced?
a.They can gain more food for their offspring
b.they can provide a larger nest for their offspring.
c.They are naturally aggressive.
d.They are carrying out a mating dance.
Answer:
i believe it is a
Explanation:
The reason is :a.They can gain more food for their offspring
Animals tend to protect their territory because they don't want intruders to invade their territory.
Animals majorly protect their territory in order to protect their foods from been eating by intruders as this will enables their offerings to have enough foods to eat.
They as well guard their territory in order to prevent intruders from invading the place they have prepare as their mating place.
Inconclusion The reason why some animals defend their territory after they have mated
and reproduced is :a.They can gain more food for their offspring
Learn more here:
https://brainly.com/question/19604368
I NEED HELP PLZZ THX <3
Question 16
A hockey puck is hit with a large force. The puck moves at a high speed as it slides over the ice.
What happens according to Newton’s first law of motion?
A) The puck does not lose any speed because ice is a very slippery surface.
B) The puck gradually slows down because mass makes objects slow down.
C) The puck gradually slows down because friction would be acting on it.
D) The puck does not lose any speed because once an object starts moving, the force of friction would no longer apply to it.
Answer:
C) The puck gradually slows down because friction would be acting on it.
Explanation:
It would be C because the puck would be scraping the ice and when it's scraping it slowly losses its speed because the ground is pushing it lightly
Hoped that helped :/