Answer:
10.0g of solute before reaching saturation
Explanation:
A saturated solution is the solution that contains the maximum amount of solute that can be dissolved. In the problem, you can have
50.0g of solute / 500.0g Solvent
Now, in 800.0g solvent you can dissolve:
800.0g Solvent * (50.0g solute / 500.0g Solvent) = 80.0g of solute can be added
As you dissolve initially 70.0g of solute. You can add:
80.0g - 70.0g =
10.0g of solute before reaching saturationBalance the following equation by providing the correct coefficients C2H6 + O2 -> CO2 + H2O
Is this an alpha or beta decay?
Answer:
In Alpha Decay the nucleus is split into 2 parts with one of these parts – the alpha particle – zooming off into space. The nucleus has its atomic number reduced by 2 and its mass number is reduced by 4 (2 protons and 2 neutrons are removed). In Beta Decay (minus) a neutron turns into a proton.
Explanation:
An engine operates on a Carnot cycle that uses 1mole of an ideal gas as the
working substance and operates from a most compressed stage of 100 Nm and
327 K. It expands isothermally to a pressure of 90 Nm and then adiabatically to a
most expanded stage of 27 K. Calculate the AU, 9, and w for each step. Calculate
the net work done and the efficiency of the cycle [Cv,m for the gas) is 25 J/k/mol.
Answer:
Step 1;
q = w = -0.52571 kJ, ΔS = 0.876 J/K
Step 2
q = 0, w = ΔU = -7.5 kJ, ΔH = -5.00574 kJ
Explanation:
The given parameters are;
[tex]P_i[/tex] = 100 N·m
[tex]T_i[/tex] = 327 K
[tex]P_f[/tex] = 90 N·m
Step 1
For isothermal expansion, we have;
ΔU = ΔH = 0
w = n·R·T·ln([tex]P_f[/tex]/[tex]P_i[/tex]) = 1 × 8.314 × 600.15 × ln(90/100) = -525.71
w ≈ -0.52571 kJ
At state 1, q = w = -0.52571 kJ
ΔS = -n·R·ln([tex]P_f[/tex]/[tex]P_i[/tex]) = -1 × 8.314 × ln(90/100) ≈ 0.876
ΔS ≈ 0.876 J/K
Step 2
q = 0 for adiabatic process
ΔU = 25×(27 - 327) = -7,500
w = ΔU = -7.5 kJ
ΔH = ΔU + n·R·ΔT
ΔH = -7,500 + 8.3142 × 300 = -5,005.74
ΔH = ΔU = -5.00574 kJ
8.
(a) Tick (™) the box next to the correct statement about the mixture.
mixture of four elements
mixture of four compounds
mixture of two elements and two compounds
mixture of one element and three compounds
Answer:
mixture of four compounds
mixture of two elements and two compounds
Explanation:
it can be one of thosecan u tell me if its correct pls I'm studying this tooWhy does Watney get left behind on Mars?
Answer:
I think it's because he was presumed dead after a storm, or like a problem with his suit
Explanation: I think it was because somebody thought he was dead in the storm? And the remaining of the crew were forced to leave him behind thinking he was dead on mars.
I might be right, might not ^^
How can autoimmune diseases be dangerous?
What are mycelium
??????????
Answer:
Mycelium is a group of hyphae which are fungus.... these are like roots in structure
Answer:
A mycelium is the vegetative part of a fungus, consisting of a network of fine white filaments
Explanation:
A gas is contained in a horizontal cylinder with a moveable piston of cross-sectional area 0.33\text{ m}^20.33 m 2 . The region outside the cylinder is at standard ambient temperature and pressure, 298\text{ K}298 K and 1\text{ bar}1 bar. When 2040\text{ J}2040 J of heat flow into the gas, the internal energy of the gas increases by 1380\text{ J}1380 J. Calculate the distance through which the piston moves. You may assume friction is negligible.
Answer:
0.02 m
Explanation:
∆U = q + w
w = ∆U - q = (1380 - 2040) J = -660 J
w = -p∆V = -pA∆h
∆h = -w/(pA)
p = 1 bar × (100000 Pa/1 bar) = 100000 Pa
∆h = -(-660 J)/(100000 Pa×0.33 m²) = 0.02 m
A gas is contained in a horizontal cylinder with a moveable piston of cross-sectional area 0.33\text{ m}^20.33 m 2. The distance through which the piston moves is 0.02 m.
What is piston ?Among other related systems, pistons are found in reciprocating engines, reciprocating pumps, gas compressors, hydraulic cylinders, and pneumatic cylinders. It is the moving part that is enclosed in a cylinder and sealed off from the gas by piston rings.
The piston, which is a part of combustion engines, transforms the energy released during combustion into a mechanical action and sends it, via the piston pin and connecting rod, to the crankshaft as a torsional force. The piston in the cylinder goes up and down when the engine is running.
The equation given by
∆ U = q + w
w = ∆ U - q
= ( 1380 - 2040 )
J = -660 J
w = -p∆V
= -pA∆h
∆h = -w / (pA)
p = 1 bar × ( 100000 Pa / 1 bar )
= 100000 Pa
∆h = - ( -660 J) / ( 100000 Pa × 0.33 m² )
= 0.02 m
Thus, The distance through which the piston moves is 0.02 m.
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Explain in terms of structure and bonding why carbon dioxide has a low boiling point and calcium carbide has a high boiling point
Answer:
See explanation
Explanation:
Let us consider the two compounds carefully. Carbon dioxide is purely a non-polar molecular compound while the bond between the C2^2- ion and Ca^2+ is ionic thereby making CaC2 an ionic compound.
Recall that ionic compounds have high melting and boiling points due to strong ionic interactions in the structure of the compound.
On the other hand, CO2 is a non-polar substance whose molecules are held together only by weak dispersion forces.
As a result of the reasons outlined above, carbon dioxide has a low boiling point and calcium carbide has a high boiling point.
Calculate the current in amperes required to produce 18.0g of aluminium in 1.50hrs (al=27.og )
Answer:
35.7 A
Explanation:
Let's consider the reduction half-reaction of Al³⁺.
Al³⁺ + 3 e⁻ ⇒ Al
We will calculate the charge required to produce 18.0 g of Al using the following conversion factors.
1 mole of Al has a mass of 27.0 g1 mole of Al is formed upon the circulation of 3 moles of electrons1 mole of electrons has a charge of 96486 C (Faraday's constant)[tex]18.0gAl \times \frac{1molAl}{27.0gAl} \times \frac{3mole^{-} }{1molAl} \times \frac{96486C}{1mole^{-} } = 1.93 \times 10^{5} C[/tex]
1.93 × 10⁵ C circulate in 1.50 hours. The intensity is:
[tex]I = \frac{1.93 \times 10^{5} C}{1.50h} \times \frac{1h}{3600s} = 35.7 A[/tex]
14. Which of the following is correct about cells?
O They are made of molecules that are made of atoms.
O They are made of organs that are made of organelles.
O They are made of tissues that are made of atoms.
O They are made of atoms that are made of molecules.
W
You are given a small beaker of solution at room temperature. You add a bit of solute to the solution and it dissolves. The original solution was
Answer:
Unsaturated
Explanation:
An unsaturated solution contains less solute than it can normally hold at a particular temperature.
This kind of solution can also dissolve more solute.
Hence, when a bit of solute is added to this solution, the solute dissolves indicating that the original solution was unsaturated.
If I have 4.4 moles of nitrous oxide (laughing gas) that is kept at 32.9 °C in a container under 1.6 atm, what is the volume of the container? (R = 0.0821 (L*atm)/(mol*K))
Round your answer to 1 decimal place.
Answer:
Explanation:
Using the ideal gas equation as follows:
PV = nRT
Where:
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
Based on the information provided in this question;
P = 1.6atm
n = 4.4 moles
R = 0.0821 L*atm/mol*K
T = 32.9°C = 32.9 + 273 = 305.9K
V = ?
How many Fluorine atoms are needed to accept the electrons of one Ca atom?
1
2
3
4
2 F atoms
Explanation:
A Ca atom has a valence number of +2, which means that when ionized, it will give up two electrons. In turn, a F atom has a valence number of -1, which means it can only accept 1 electron when ionized. So to accommodate the two electrons from Ca atom, we need 2 F atoms.
What is the iupac name of CH3-O-CH2-CH2-CH3?
Answer:
The iupac name of CH3-O-CH2-CH2-CH3 is Methoxybutane.
Two water molecules are weakly attracted to each other when a slightly positive hydrogen atom in the first molecule is attracted to the slightly negative oxygen atom on the second molecule. What type of bond is this
Can I please get help with chemistry.
I got these three questions wrong and I’m wondering which answers would be right for the questions.
Answer: The 3rd one
Explanation: Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.
I might be wrong
The balanced equation for the combustion of Hexane,C6H14 , is
Answer:
[tex]2C _{6}H _{14} + 19O _{2}→12CO _{2} +14H _{2} O[/tex]
Thermal energy is a measure of the __________ of particles of matter. *
(subject is science I just cant change it right now)
container has 3 moles of gas with a volume of 60 liters and at a temperature of 250 K, Calculate the pressure inside the container in kPa
Answer:
103.9 KPa
Explanation:
From the ideal gas equation;
PV=nRT
From the parameters given;
P= ?
T=250 K
V= 60L
n=3
R=0.082 atmLK-1mol-1
P= nRT/V
P= 3 × 0.082 × 250/60
P= 1.025 atm
1 atm=101325 pascals
1.025 atm = 1.025 atm × 101325 pascals/1atm
= 103.9 KPa
Answer:
103.9kPa
Explanation:
To solve this question we must use the equation:
PV = nRT
P = nRT / V
Where P is pressure in atm
n are moles of the gas = 3mol
R is gas constant = 0.082atmL/molK
T is absolute temperature = 250K
V = 60L
P = 3mol*0.082atmL/molK*250K / 60L
P = 1.025atm
As 1atm = 101.325kPa
1.025atm * (101.325kPa / 1atm) = 103.9kPa
A mixture of oxygen( O2), dinitrogen monoxide (N2O), and argon (Ar) has a total pressure of 0.98 atm. What is the partial pressure of N2O, if the partial pressure of O2 is 0.48 atm and the partial pressure of Ar is 0.15 atm?
Answer: The partial pressure of [tex]N_{2}O[/tex] is 0.35 atm.
Explanation:
Given: Total pressure = 0.98 atm
Partial pressure of [tex]O_{2}[/tex] = 0.48 atm
Partial pressure of Ar = 0.15 atm
Partial pressure of [tex]N_{2}O[/tex] = ?
Total pressure is the sum of partial pressure of each component present in a mixture of gases.
Hence, partial pressure of [tex]N_{2}O[/tex] is calculated as follows.
Total pressure = [tex]P_{N_{2}O} + P_{O_{2}} + P_{Ar}[/tex]
Substitute the values into above formula as follows.
[tex]Total pressure = P_{N_{2}O} + P_{O_{2}} + P_{Ar}\\0.98 atm = P_{N_{2}O} + 0.48 atm + 0.15 atm\\P_{N_{2}O} = 0.35 atm[/tex]
Thus, we can conclude that the partial pressure of [tex]N_{2}O[/tex] is 0.35 atm.
You have 11.27 moles of Cl2 gas. How many moles of NaBr do you need to completely undergo this reaction?
Answer:
22.54 moles of NaBr are needed
Explanation:
The reaction of Cl2 with NaBr occurs as follows:
Cl2 + 2NaBr → 2NaCl + Br2
Where 1 mole of Cl2 requires 2 moles of NaBr for a complete reaction
As in the problem, we have 11.27 moles of Cl2, the moles of NaBr required are:
11.27mol Cl2 * (2mol NaBr / 1mol Br2) =
22.54 moles of NaBr are neededwrite the chemical formula of 25 compound
Inicialmente una muestra de neón tiene un volumen de 2,50 L a 15 °C. ¿Cuál es la
temperatura en °C, cuando el volumen de la muestra cambia a cada uno de los
siguientes volúmenes, ¿manteniéndose la presión constante?
a. 5,0 L b. 1250 ml c. 7,50L d. 3550 ml
naoooooooo seiiiiiiiii !!!!!!!!!!!!!!
All of the following elements are metals EXCEPT?
A. Br B. Co C. Cu D. Zn
Answer:
Br
Explanation:
Can someone help me with this?
During photosynthesis, plants incorporate atmospheric
Cinto more complex energy-storage
molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light
energy into
energy stored in the molecules.
Answer:
carbon dioxide
oxygen
**
During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.
What is Photosynthesis ?
It is the process by which plants , algae and some bacteria uses water from the carbon dioxide, air and soil and in this process food is prepared in the presence of chlorophyll and sunlight. In this process light energy converted to chemical energy.
Thus, we can say that During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.
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Molar mass of propan-1-ol
Answer:
60g/mol.
Explanation:
TO FIND :-
Molar mass of Propan-1-olFACTS TO KNOW BEFORE FINDING ANSWER :-
Chemical formula of Propan-1-ol = CH₃CH₂CH₂OH [or] C₃H₈OMolar mass of C = 12g/mol.Molar mass of H = 1g/mol.Molar mass of O = 16g/mol.SOLUTION :-
Molar mass of C₃H₈O = 3(Molar mass of C) + 8(Molar mass of H) + 1(Molar mass of O)
⇒ Molar mass of C₃H₈O = (3×12) + (8×1) + 16 = 36 + 8 + 16 = 60g/mol.
Calculate the Molar Mass of Radon pentaiodide (Rnls)
857
349
1237
Explanation:
222.01758 g/mol
3.1Computed Properties
(2-2) Looking at the chemical formula CaF2 (calcium fluoride), what do you think this substance is made of? (Choose ALL that apply)
Metal
Metalloid
Non-metal
Answer:
Metal
Non-metal
Explanation:
CaF2 is an ionic compound. Ionic compounds are mostly composed of a metal and a non metal. Metals donate electrons to non-metals to form ionic compounds.
Calcium is a divalent ion of group two in the periodic table while F is a univalent nonmetal of group 17 in the periodic table. Hence the compound CaF2 is composed of a metal and a nonmetal.