Answer:
8.15 L I2
Explanation:
So, I have the balanced equation of: 2CuBr2 +4KI → 2CuI + 4KBr + I2
Now, we do:
241.6g / 1 mol KI / 1 mol I2 / 22.4 L
--------------------------------------------------------- = 8.15 L I2
/ 166g KI / 4 mol KI / 1 mol I2
Hope this helps! ^u^
SOMEONE SMART HELP PLS!!
Which of the following best describes the difference between a mixture and a pure substance? A. A mixture has different properties throughout; a pure substance has the same properties throughout. B. A mixture is made up of more than one type of atom; a pure substance is made up of only one type of atom. C. A mixture is made up of only one type of atom; a pure substance is made up of more than one type of atom. D. A mixture has the same properties throughout; a pure substance has the different properties throughout.
Answer:d
Explanation:
Answer:
A mixture has different properties throughout; a pure substance has the same properties throughout.
Explanation:
what does this graph represent?
A. speed
B. velocity
C. acceleration
D. momentum?
A 40.0 gram sample of water releases 503 Joules of energy when cooled from 25.0˚C to 22.0˚C. What is the value of the specific heat of water? Round to the nearest hundredth.
Answer:
Explanation:
i dont know either but im working on it now, i think that you are supposed to use this equation Q = m * ΔT * Cp once i get the answer ill tell you
Folding and faulting are two examples of slow changes by which plate tectonics can shape Earth’s surface. Which of the following describes a difference between these two processes?
A. Folding is caused by circular movement of the plates around each other, while faulting causes pressure and heat to be reduced.
B. Folding begins with the fracturing of the rock, while faulting takes place when high heat and pressure are exerted horizontally.
C. Folding takes place when pressure and heat bend rock horizontally or vertically, while faulting begins with fracturing of the rock.
D. Folding is caused by forces of the plates found close to the surface of Earth, while faulting occurs through continental collisions deep within Earth.
Answer:
d
Explanation:
Answer:
D
Explanation:
1. A student predicted the reaction between hydrogen and oxygen gas would yield 125
mL of water. However, after measuring the water formed in the reaction, the
student determined that only 110mL of water was actually formed. What is the
percent yield of this reaction?
Answer:
88%
Explanation:
percent yield is the actual yield divided by the theoretical (predicted) yield, then multiplied by 100 to get a percentage.
110/125 = 0.88
0.88 x 100 = 88%
24ethanjones88 unfvbfuhgtbnuthigthtijbtnibttbhiitti
Answer:
mmm Nice B)
Explanation:
Thermal energy would naturally flow between objects at which temperatures?
O A. from 5°C to -5°C
OB. from 15°C to 15°C
OC. from 35°C to 45°C
OD. from -15°C to 15°C
Answer:
i think the answer is letter C. From 35°c to 45°c
Explanation:
sorry if it is wrong
Which of these layers is found directly above the Earth's core?
Group of answer choices
Outer core
Mantle
Inner core
Crust
Answer: Mantle
Explanation:
there are 3 layers of the earth- core, mantle and crust. The layer found directly above the earth's core is the mantle.
Answer:
The answer depends on what you are taking about: the outer core or the inner core?
Answer: Mantle
Explanation:
If you find a picture of the Earth's layers, you can see that the inner core is the bottommost layer. However, if you combine the Inner Core and Outer Core, that could be determined as the Earth's core.
I would chose the Mantle because if the two cores are combined, the layer directly above them is the Mantle.
Can somebody give me some backup for this question?
1. Which group of elements does not get an electronegativity value
because they do not form compounds? *
Alkali Metals
Alkaline Earth Metals
Boron Group
Carbon Group
Nitrogen Group
Oxygen Group
Answer:
noble gases from what i learnt
553.5 mL ?:cm^3
how do i get my answer? and what is the answer?
Answer:
553.5 cm3
Reason:
1 mL = 1 cm3
How much uranium does helium have?
Answer:
Helium is produced by the decay of uranium and thorium in granitoid basement rocks. The liberated helium is buoyant and moves toward the surface in porosity associated with basement faults.
Explanation:
Matching
Match each definition with the correct term.
Definitions
_____ 1. device for measuring temperature
_____ 2. total kinetic energy of particles of matter
_____ 3. amount of energy needed to raise the temperature of 1 gram of a substance by 1 °C
_____ 4. average kinetic energy of particles of matter
_____ 5. scale for measuring temperature
From the CK-12 Physical Science For Middle School Workbook
_____ 6. transfer of thermal energy between objects with different temperatures
_____ 7. measure that affects the thermal energy of matter but not its temperature
Terms
thermal energy
heat
temperature
thermometer
mass
Celsius
specific heat
Answer:
1. thermometer
2. thermal energy
3. specific heat
4. temperature
5. Celsius
6. heat
7. mass
8. What is the [H+] of a solution with a pH of 4.78
Answer:
7.01 is the answer of the [H+] of a solution with a pH of 4.78
HELP ME PLEASE I NEED THE ANDEER NOW
1. Convert 1.5 moles to molecules 2. Convert 1.204x10^24 molecules to moles 3. Convert 1.5x10^20 molecules to moles 4.Convert 0.35 moles to molecules 5. Convert 15 moles H2O to atoms 6.Convert 0.75 moles CaSO4 to atoms
Answer:
Explanation:
1.5 moles to molecules
1 mole = 6.02 x 10²³ molecules
1.5 moles = 6.02 x 1.5 x 10²³ molecules
= 9.03 x 10²³ molecules
2 )
Convert 1.204x10²⁴ molecules to moles
6.02 x 10²³ molecules = 1 mole
1.204x10²⁴ molecules = 1.204x10²⁴ / 6.02 x 10²³ moles
= 2 moles
3 ) Convert 1.5x10^20 molecules to moles
6.02 x 10²³ molecules = 1 mole
1.5x10²⁰ molecules = 1.5x10²⁰ / 6.02 x 10²³ moles
= .25 x 10⁻³ moles
= 2.5 x 10⁻⁴ moles .
4 )
Convert 0.35 moles to molecules
1 moles = 6.02 x 10²³ molecules
.35 mole = 6.02 x .35 x 10²³ molecules
= 2.1 x 10²³ molecules.
5 )
Convert 15 moles H₂O to atoms
1 moles = 6.02 x 10²³ molecules
15 moles = 15 x 6.02 x 10²³ molecules
= 90.3 x 10²³ molecules of water
1 molecule of water has 3 atoms in total
90.3 x 10²³ molecules of water = 90.3 x 3 x 10²³ atoms
= 270.9 x 10²³ atoms .
6 )
0.75 moles CaSO₄ to atoms
1 moles = 6.02 x 10²³ molecules
.75 moles = .75 x 6.02 x 10²³ molecules of CaSO₄
= 4.515 x 10²³ molecules of CaSO₄
1 molecule of CaSO₄ = 6 atoms
4.515 x 10²³ molecules of CaSO₄ = 6 x 4.515 x 10²³ atoms
= 27.09 x 10²³ atoms .
HELP QUICKLY PLEASE!!! Thermal energy is transferred from a hot object to a colder object by means of ___
a. heat
b. energy
c. work
d. temperature
e. none of the above
Answer:
Heat is the transfer of energy
Explanation:
Heat refers to the energy transferred from a hotter object to a cooler one. Heat is transferred in three ways: radiation, conduction, and convection. Radiation is the direct transfer of energy. The direct transfer of heat from one substance to another substance that it is touching is called conduction.
How do scientists know a reaction in dynamic equilibrium hasn't just stopped?
Answer:
any reaction will be in dynamic equilibrium if it's reversible and the rates of the forward and reverse reactions are equal.
Explanation:
say that you prepare a solution that is saturated with an aqueous solution of NaCl
how many grams will be produced??
Explanation:
b is correct. 30.6 g H2O is produced.
plz help this was due yesterday butttttt i didn’t want to do it...
Answer:
It is the same it has cycles related to it (that's what I could think of)
Complete the Replication and Transcription of the following DNA Sequence:
GGAGTTACAGTTAGTA
Replication (DNA to DNA):
Transcription (DNA to RNA):
Answer:
CCUCAAUGUCAAUCAU or you could try CCTCAACGTCAATCAT i could be wrong so sorry im not the best
Answer:
Replicated DNA: CCT-CAA-TGT-CAA-TCA-T
Transcription sequence (mRNA): CCU-CAA-UGU-CAA-UCA-U
Explanation:
If the volume is 500 mL, the mass of air is 60g (molar mass of air= 29g/mol), and the temperature is 0 C, what is the pressure inside the bottle?
Answer:
The pressure inside the bottle is 92.678 atm.
Explanation:
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case:
P= ?V= 500 mL= 0.500 Ln= 60 g* [tex]\frac{1 mole}{29 g}[/tex] = 2.07 molesR= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= 0 C= 273 KReplacing:
P* 0.500 L= 2.07 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] * 273 K
Solving:
[tex]P=\frac{2.07 moles* 0.082 \frac{atm*L}{mol*K} * 273 K}{0.500 L}[/tex]
P= 92.678 atm
The pressure inside the bottle is 92.678 atm.
How might knowing the indicators of a chemical reaction help you explain what happened when the sulfuric acid was mixed with powdered sugar? How does this relate to the rearrangement of atoms that occurs in a chemical reaction? Record your evidence.
Answer:
I don't know I'm sorry I will tell you another
How many atoms are there in 0.655 moles of C6H14?
Answer: 3.94 x 10^23 molecules
Explanation: hope this helps!
Match the items to use the analogy of time to the vocabulary of chemistry.
Answer:
1 year- 1 mole
time in general- amount of matter
1 second- 1 atom/ particle
Answer:
1 Year => 1 Mole
Time in General => Amount of Matter
1 Second => 1 Atom/Particle
Explanation:
These pairs make the most sense.
Hope it helps!!!
What's the element from this electron configuration?
1s22s22p63s23p4
What is the molar mass of Pb(ClO )4 ?
Answer:
605.0024
The molar mass and molecular weight of Pb(ClO4)4 is 605.0024.
Explanation:
How many moles are in 45.5 g of P2O5 ?
Answer:
0.327214 mol
Explanation:
45.5/278.106=0.163607
Then, 0.163607x2= 0.327214
The Kₐ of carbonic acid is 4.3 x10⁻⁷ . H₂CO₃ ⇄ H⁺ + HCO₃ ⁻ This means that H₂CO₃ is a
A) Good hydrogen-ion acceptor.
B) Poor hydrogen-ion acceptor.
C) Good hydrogen-ion donor.
D) Poor hydrogen-ion donor.
Answer:
A good hydrogen ion acceptor