How many atoms are in 1 mole of cobalt atoms?
Answer:
Explanation:
Explanation: NA,Avogadro's number specifies 6.0221×1023 individual particles. It is simply another collective number like a dozen, or a score, or a gross. NA has the property that 6.0221×1023 individual cobalt atoms has a mass of 58.93⋅g
Answer:
6.0221×1023
Explanation:
Is this statement true or false?
Inner planets have many natural satellites.
true false
Answer:
true
Explanation:
we have many sattelites that are seen by many astounouts in space by telescope but more than half space is not discoverd
Explain why a flash of green light made flubber so energetic
Answer:
The flash of green light may give off some type of energy that only emits from green light which probably energizes the Flubber
Explanation:
A flubber is a rubber like polymer that absorbs and amplifies energy. A flubber absorbs energy from a light source and electrons present in it are excited in order to emit light of higher wavelength. The green light absorbed by the flubber to emit longer wavelength of light emitting more energy.
Based on the equation, how many grams of Br2 are required to react completely with 72.4 grams of AlCl3
NEVERMIND, I FIGURED IT OUT
Answer: 131 g of bromine is required.
Explanation:
The balanced equation will be :
[tex]2AlCl_3+3Br_2\rightarrow 2AlBr_3+3Cl_2[/tex]
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
moles of [tex]AlCl_3[/tex]
[tex]\text{Number of moles}=\frac{72.4g}{133g/mol}=0.544moles[/tex]
According to stoichiometry :
2 moles of [tex]AlCl_3[/tex] require = 3 moles of [tex]Br_2[/tex]
Thus 0.544 moles of [tex]AlCl_3[/tex] require=[tex]\frac{3}{2}\times 0.544=0.816moles[/tex] of [tex]Br_2[/tex]
Mass of [tex]Br_2=moles\times {\text {Molar mass}}=0.816moles\times 160g/mol=131g[/tex]
Thus 131 g of bromine is required.
In plants, what does chlorophyll absorb so photosynthesis can take place?
OA.
water
OB.
gases
OC. energy
OD.
nutrients
Answer:
OC energy
Explanation:
PLEASE HELP
Vehicles use diesel fuels. Which one of these energy transformations takes place when the fuel is used by the engine
Answer:
A
Explanation:
I would say a because we all know that kinetic energy is energy in motion and fuel is an example of chemical energy. So it must be from chemical to kinetic energy.
identify this compound: KClO4
Answer: Potassium perchlorate
Explanation:
Which type of mass movement is the most destructive
Answer:
Landslide
Explanation:
its most destructive because its various rocks falling and it goes blammow
Answer: the answer is C
Landslide
Explanation:
Which statement is false
Answer:
B
Explanation:
Answer:
B - O has a higher ionization engery then P
Explanation:
Please Help! I Really Really Need It!
Answer:
The picteure isnt lodeing
Explanation:
mark brainly
A sample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. How much
potassium-40 was in the sample originally if the half-life of potassium-40 is 1.3 billion years?
A. 4.20
B. 8.40 g
c. 12.6 g
D. 16.8 g
E. 25.2 g
Answer:
The correct answer is b
Explanation:
Answer:
Correct Answer is (B)
Explanation:
Got it right on plato Chemistry Post test
Hope I helped you out :)
What do the cells do with the things they absorb
Answer:
Use them as nutrients probably
Is the following equation balanced correctly?
NaCl + H2 Na + 2HCl
a 120 volt power supply connected to a 10Ω resistor will produce amps of current
5. Thomson's experiments with cathode rays led to the discovery of the:
electron
Neutron
Deoxyribonucleic acid is also referred to as
The answer is nucleic acid
Answer:
(DNA) is a molecule that encodes an organism's genetic blueprint
Explanation:
Deoxyribo Is the D
nucleic Is the N
acid Is the A
{DNA}
Hope that helps :)
How do you know when a saturated solution has been produced?
11. A student is studying guppies, a type of fish. The student learns
that common guppies normally live in water with temperatures from
22°C to 30°C. The student counts the number of movements in 1
minute at several different temperatures. According to the student's
graph, about how many movements on average would the guppies
most likely make at 30°C?
Which one of the following is an example of a difficulty caused by thermal
expansion?
O A. The siding on a house buckles on a hot day.
OB. Watery iced tea
OC. Smog in the air during summer heat
OD. lce cream not getting hard
Answer: A
Explanation:just passed it
Answer:
A. The siding on a house buckles on a hot day
Explanation:
The key word in this question is EXPANSION. Without even knowing the siding expands causing it to buckle when it's hot, you can use process of elimination. It can't be answer B because watered down iced tea would most likely be as a result of the ice melting which is the opposite of expanding. It can't be C because air is not solidified and therefore can't expand. Lastly, D cannot be it because ice cream expands when cold, causing it to become hard. If it's not hardening then it's not expanding. This is also the correct answer on a p e.x
She remembered that chemical equations can summarize what happens in a chemical reaction. What is the name of the two parts found on the left side of the equation below? 4 Fe + 3O2 → 2Fe2O3 A. products B. reactants C. scientific notation D. synthesis
Answer:
The name of the two parts found on the left side of the equation is reactants.
Explanation:
Chemical reaction is the way one substance reacts against another. That is, a chemical reaction is that chemical process in which two or more substances, by the action of an energy factor, are converted into other substances. The new substance (s) that are formed usually present a totally different appearance from that of the starting substances.
In a chemical reaction there are the substances that react, that is, the reactants, and the substances produced, called products.
A chemical reaction is represented by a chemical equation. The formulas of the reactants are written on the left, and those of the products on the right, both separated by an arrow indicating the direction of the reaction.
Reactants ⇒ Products
Then, the name of the two parts found on the left side of the equation is reactants.
how many moles of oxygen molecules can be produced from 6 moles of lead oxide
Answer:
Moles of oxygen molecules produced = 3 mol
Explanation:
Given data:
Moles of oxygen molecules produced = ?
Number of moles of lead oxide decomposed = 6 mol
Solution:
Chemical equation:
2PbO₂ → 2PbO + O₂
Now we will compare the moles of oxygen and lead oxide.
PbO₂ : O₂
2 : 1
6 : 1/2×6 =3 mol
three moles of oxygen molecules are produced.
what were J.J thomson's ideas called
Answer: the plum pudding model
Explanation:
for A P E X i just took the test
Which of the following is an example of a physical change in digestion?
water being absorbed in the large intestines
enzymes break down food nutrients
nutrients are broken down into different molecules
saliva breaking down carbohydrates
Answer:
The answer would be C
Explanation:
I got it right on E D G E N U I T Y
2021
water is set on the stove to boil as it absorbs the temperature increases from 27.5°C to 56.0°C. if there was 325g of water added to the pot, how much energy was absorbed if the heat capacity of water is 4.18J/°C? Round answer to the correct number of significant figures.
Which of the following is an example of a chemical change?
Boiling water
Burning paper
Dissolving sugar in water
Melting gold
Answer:
Burning paper
Explanation:
I got it right on the test.
plsplsplsplsplsplsplsplsplspls help
Answer:
this is difficult but simple to answer
Explanation:
all atoms move in 1 direction no more than 2
________ is defined as average kinetic energy.
A. temperature
B. volume
C. heat
D. pressure
Convert 2.5x10^6mm to km
Answer:
2.5 kilometers
Explanation:
Which of the following is an example of a decomposition reaction?
A rectangular box has the following dimensions on the inside: 5 cm x 5 cm x 10 cm. What volume can the box hold, in milliliters?
- 20 mL
- 259 mL
- 25 mL
- 50 mL
Answer:
The volume in milliliters is 250mL
Explanation:
The volume of a rectangle is obtained using the equation:
Volume = Length * Width * Height
In the problem, we can take length as 5cm, width as 5cm and height as 10cm. Thus, volume of the rectangular box is:
Volume = 5cm * 5cm * 10cm
Volume = 250cm³
1mL = 1cm³.
That means the volume in milliliters is 250mL