Answer:
18.9 moles
Explanation:
We have the following data:
V = 50 L
P = 12.4 atm
T= 127°C + 273 = 400 K
R = 0.082 L.atm/K.mol (it is the gas constant)
We use the ideal gas equation to calculate the number of moles n of the gas:
PV = nRT
⇒ n = PV/RT = (12.4 atm x 50 L)/(0.082 L.atm/K.mol x 400 K) = 18.9 mol
can someone please try to help me
Answer:
I would say B all of these
what ingredients are needed to turn the cake mix into cake batter
Answer:
Ingredients
2 ⅓ cups all-purpose flour.
1 tablespoon baking powder.
¾ teaspoon salt.
1 ½ cups white sugar.
½ cup shortening.
2 eggs.
1 cup milk.
1 teaspoon vanilla extract.
Explanation:
Which type of matter tends to become LESS soluble in water as the temperature rises? *
A. solids
B. liquids
C. gases
D. plasmas
Liquids is a type of matter which tend to become less soluble in water as the temperature rises. Therefore, the correct option is option B.
What is solubility?The ability of a material, the solute, to combine with some other substance, the solvent, is known as solubility in chemistry. Insolubility, or the solute's inability to create such a solution, is the opposite attribute.
The concentration of a solute inside a saturated solution—a solution where no more solute can indeed be dissolved—is typically used to gauge the degree of a substance's solubility in a particular solvent. The two compounds have been shown to be just at solubility equilibrium at this time. For some solutes or solvents, there will be no inherent limit, where in case the two materials are be "miscible in any quantities". Liquids is a type of matter which tend to become less soluble in water as the temperature rises.
Therefore, the correct option is option B.
To know more about solubility, here:
https://brainly.com/question/14366471
#SPJ3
Name the following alkane molecule:
Answer:
c
Explanation:
Create 3 multiple choice questions on
photosynthesis and the tropisms.
Number your questions using 1,2,3
and
your answer choices using a,b,c.
Example:
1)What three things are required in order for
photosynthesis to take place
A)Sugar, glucose plants
B)Radiant energy, water, oxygen
C)Radiant energy, water, carbon dioxide
Help ASAP!
47.9 ml hrdrogen is collected at 26° Celsius and 718 torr. Find the volume occupied at STP
Answer:
41.45 mL
Explanation:
Applying the general gas equation,
PV/T = P'V'/T'............... Equation 1
Where P = Initial pressure of hydrogen, V = Initial volume of hydrogen, T= Initial Temperature of hydrogen, P' = Final pressure of hydrogen, V' = Final Volume of Hydrogen, T' = Final Temperature.
make V' the subject of the equation
V' = PVT'/TP'................ Equation 2
Given: P = 718 torr = (718×133.322) N/m² = 95725.196 N/m², V = 47.9 mL = 0.0479 dm³, T = 26 °C = (26+273) = 299 K, T' = 273 K, P' = 101000 N/m²
Substitute these values into equation 2
V' = ( 95725.196×0.0479×273)/(299×101000)
V' = 0.04145 dm³
V' = 41.45 mL
25 g of 116oC steam are bubbled into 0.2384 kg of water at 8oC. Find the final temperature of the system.
Answer: The final temperature of the system will be [tex]13.14^0C[/tex]
Explanation:
[tex]heat_{absorbed}=heat_{released}[/tex]
As we know that,
[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]
[tex]m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)][/tex] .................(1)
where,
q = heat absorbed or released
[tex]m_1[/tex] = mass of steam = 25 g
[tex]m_2[/tex] = mass of water = 0.2384 kg = 238.4 g (1kg=1000g)
[tex]T_{final}[/tex] = final temperature = ?
[tex]T_1[/tex] = temperature of steam = [tex]116^oC[/tex]
[tex]T_2[/tex] = temperature of water = [tex]8^oC[/tex]
[tex]c_1[/tex] = specific heat of steam = [tex]1.996J/g^0C[/tex]
[tex]c_2[/tex] = specific heat of water= [tex]4.184J/g^0C[/tex]
Now put all the given values in equation (1), we get
[tex]25g\times 1.996J/g^0C\times (T_{final}-116)=-[238.4g\times 4.184J/g^0C\times (T_{final}-8)][/tex]
[tex]T_{final}=13.14^0C[/tex]
Therefore, the final temperature of the system will be [tex]13.14^0C[/tex]
Describe how crude oil is formed.
Explanation:
crude oil takes thousands of years before forming.
it takes place when animals and plants die...later they decompose especially the ones in water ..the ones on land burn as fossil fuels and go back to the atmosphere through combustion..the decomposed materials turn into crude oil in the ocean where it's extracted and separated through fractional distillation into several oils such diesel, petroleum, coalter e.t.c
Explain the laboratory preparation of hydrogen
Answer:
laboratory preparation off Hydrogen: Hydrogen is prepared in the laboratory by the action of the dilute hydrochloric acid or dilute sulphuric acid on granulated zinc. Use of Granulated Zinc Granulated zinc contains an impurity like copper which acts as a positive catalyyst.
Explanation:
Hope this helps!
A. chlorine
B. sulfur
C. oxygen
D. none of these
Answer: The correct answer is D
Explanation:
When reacting Na with Cl2 , we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?
Answer:
[tex]\boxed {\boxed {\sf 104 \%}}[/tex]
Explanation:
Percent ratio is the ratio of the actual yield to the theoretical yield. The formula is below.
[tex]Percent \ Yield} = \frac{{Actual \ Yield}}{{Theoretical \ Yield}} \times 100 \%[/tex]
The reaction of sodium and chlorine should theoretically yield 12.5 grams, but the actual yield was 13.0 grams.
actual yield= 13.0 gtheoretical yield = 12.5 gSubstitute these values into the formula.
[tex]Percent \ Yield} = \frac{{13.0 \ g }}{{12.5 \ g}} \times 100 \%[/tex]
Divide.
[tex]Percent \ Yield} = 1.04 \times 100 \%[/tex]
Multiply.
[tex]Percent \ Yield= 104 \%[/tex]
For this reaction, the percent yield is 104%
22. Most plates have a convergent boundary on one side and a
divergent boundary on the other. *
O a true
O b. false
Answer:
the answer for this question is true
How many milliliters of a 5.0 M H2SO4 stock solution would you need to prepare 100.0 mL of 0.25 M H2SO4?
Answer:
5 milliliters
Explanation:
Use the formula M1V1 = M2V2 where M is molarity and V is volume
Plug in numbers
(.25 M)(100 mL) = (5 M)V2
V2 = 5 mL
The volume of stock solution of 5M H₂SO₄ needed to prepare 100mL of 0.25M H₂SO₄ is 5mL.
How do we calculate the volume?Volume of stock solution to prepare any dilute solution will be calculated by using the following formula:
M₁V₁ = M₂V₂, where
M₁ & V₁ is the molarity and volume of stock solution, and
M₂ & V₂ is the molarity and volume of final prepared solution.
On putting values from the question to the above formula and calculate for the value of V₁ as:
V₁ = (0.25)(100) / (5)
V₁ = 5 mL
Hence required volume is 5mL.
To know more about volume & molarity, visit the below link:
https://brainly.com/question/24881505
1. What is the function of the circulatory system? * 10 points A. Provide blood with oxygen from the air, & to get rid of carbon dioxide B. Carry oxygen, nutrients, waste, & to fight pathogens C. Secrete hormones to regulate the body and maintain homeostasis D. Produce red blood cells, white blood cells, & platelets
Answer:
B. Carry oxygen, nutrients, waste, & to fight pathogens
Explanation:
The circulatory system refers to all organs and tissues involved in carrying blood and lymph around the body.
The circulatory system carries oxygenated blood from the heart to cells and deoxygenated blood back to the heart.
Nutrients are carried in the blood to cells in different parts of the body and waste products are also carried from cells in the blood.
White blood cells is a component of blood in the circulatory system that fights off diseases.
A sample of hydrogen gas will behave most like an ideal gas under the conditions of
A) low pressure and low temperature
B) low pressure and high temperature
C) high pressure and low temperature
D) high pressure and high temperature
Answer:
Low pressure and high temperature
Explanation:
Dinitrogen oxide (N2O) gas was generated from the thermal decomposition of ammonium nitrate and collected over water. The wet gas occupied 123 mL at 21◦C when the atmospheric pressure was 760 Torr. What volume would the same amount of dry dinitrogen oxide have occupied if collected at 760 Torr and 21 ◦C? The vapor pressure of water is 18.65 Torr at 21◦C. Answer in units of mL.
Answer:
119.98 mL
Explanation:
Initial volume V1 = 123 ml
Initial temperature = T1 = 21◦C + 273 = 294 K
Initial pressure P1 = 760 Torr - 18.65 Torr = 741.35 Torr
Final volume V2= ???
Final temperature = T2= 21◦C + 273 = 294 K
Final pressure P2 = 760 Torr
From;
P1V1/T1= P2V2/T2
P1V1T2 = P2V2T1
V2 = P1V1T2/P2T1
V2= 741.35 * 123 * 294/760 * 294
V2 = 119.98 mL
Which of the following is not an example of predation?
The shark eating the shrimp
The lion eating the zebra.
The mouse being eaten by the cat.
The flower being pollinated by the bee, and the bee receiving nectar from the flower.
Answer:
the flower big pollinated by The Bee and the receiving letter from the flower
AH for the reaction
IF5 (g) → IF3 (g) + F2 (g)
kJ, give the data below.
IF (8) + F2 (g) → IF3 (8)
IF (g) + 2F2(8) ► F5 (8)
AH=-390 kJ
AH=-745 kJ
A) -1135
B) +35
C) +1135
D) -35
E) +355
Answer:
E) +355 kJ
Explanation:
Based on Hess's law, it is possible to obtain ΔH of a reaction from the sum of similar reactions:
(1) IF(g) + F2(g) → IF3(g) ΔH = -390kJ
(2) IF(g) + 2F2(g) → IF5(g) ΔH = -745kJ
The sum of (1) - (2) is:
IF(g) + F2(g) → IF3(g)
IF5(g) → IF(g) + 2F2(g)
_________________
IF5(g) → IF3(g) + F2(g)
ΔH = -390kJ - (-745kJ)
ΔH = +355kJ
Right answer is:
E) +355 kJwhich of the following elements have the same number of valence electrons?
l. nitrogen (N)
ll. oxygen (O)
lll. fluorine (F)
lv. sulfur (S)
v. selenium (Se)
A. IV, and V
B. I, II, and III
C. I, II, and IV
D. II, IV, and V
The answer is II. Oxygen, IV. Sulfur, and V. Selenium.
Explanation:
Going down the list that was provided, we can use the periodic table of elements to determine the valence electrons.
- Nitrogen has 5 valence electrons
- Oxygen has 6 valence electrons
- Fluorine has 7 valence electrons
- Sulfur has 6 valence electrons
- Selenium has 6 valence electrons
Since oxygen, sulfur, and selenium all have 6 valence electrons, then that is the correct answer.
I hope this helps you!
Which of these are vertebrate chordates? (Select all that apply.)
Ο) fish
Ο) humans
Ο) flatworm
Ο) mockingbird
Answer:
humans
Explanation:
vertebate chordates include animals , mammals also the fish option is correct
NEED THIS LESSS THAN 5 MINUTES HELP!!! ITS 15 POINTSSWhich of the following is FALSE regarding meiosis?
Meiosis results in four genetically unique cells
Meiosis results in gametes with half the number of chromosomes as the parent cell Meiosis is a type of cell division that produces gametes
All of these answers are true regarding meiosis
Meiosis is what happens when body cells divide to form identical body cells
Answer:
This is false: Meiosis is what happens when body cells divide to form identical body cells.
Explanation:
Meiosis is what happens when body cells divide to form identical body cells
Elements in a groups have the same number of ___ and the same ____.
Answer:
Protons, electrons
Explanation:
Elements in a groups have the same number of protons and the same electrons.
What is the average time it took for the tablet to
dissolve in cold water?
Answer:
It might take 20-30 seconds to dissolve in water
Explanation:
Answer:
86
Explanation:
The pressure of a gas is reduced from 1220 mmHg to 836 mmHg as the volume of its container is increased by moving a piston from 85 mL to 350 mL. What would the final temperature (in Kelvin) be if the original temperature was 363 K?
Answer:
1024.24 K
Explanation:
From the question,
Applying the general gas eqaution
PV/T = P'V'/T'.................... Equation 1
Where P, V, and T = Initial pressure, initial volume and initial Temperature of the gas respectively, P', V' and T' = Final pressure, Final Volume and Final temperature of the gas respectively
make T' the subject of the equation
T' = P'V'T/(PV).................... Equation 2
Given: P = 1220 mmHg, V = 85 mL, P' = 836 mmHg, V' = 350 mL, T = 363 K
Substitute these value into equation 2
T' = (836×350×363)/(1220×85)
T' = 1024.24 K
Which type of energy would most likely create the worst environmental disaster from an accident or spill?
Answer:
nuclear energy
Explanation:
NEED HELP ASAP!!!!!!!!!!!!!!!!!!!!!!
Which of the organisms below must perform cellular respiration to survive?
A. Tree
B. Bird
C. Human
D. Bacteria
E. Fish
[Need an explanation to with the answer no links]
Answer:
1
Explanation:
What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO? 4NH3+6NO → 5N2 + 6H2O
Explanation:
M
r
N
H
3
=
17
;
M
r
O
2
=
32
;
M
r
N
O
=
26
;
M
r
H
2
O
=
18
Using the equation:
Number of Moles = Mass / Mr
Number of Moles
N
H
3
=
175
17
=
10.3
Number of Moles
O
2
=
310
32
=
9.69
O
2
is the limiting reagent because the least moles of this are used in the reaction.
From the balanced equation, we can see that
O
2
and
N
O
are in a 5:4 ratio
5
4
=
0.8
9.69
×
0.8
=
7.75
7.75 moles of
N
O
is the maximum that can be produced from 310g of
O
2
. To convert this to mass we use the same equation as in the first step.
Mass = Moles x Mr
7.75
×
26
=
202
g
202g is the theoretical yield of
N
O
To calculate the percentage yield, you just divide the actual yield by the theoretical yield and multiply by 100:
197
202
×
100
=
98
%
The limiting reactant for the reaction between 10 moles of NH₃ and 30 moles of NO is NH₃.
The balanced equation for the reaction is given below:
4NH₃ + 6NO → 5N₂ + 6H₂O
From the balanced equation above,
4 moles of NH₃ reacted with 6 moles of NO.
With the above information, we can obtain the limiting reactant as follow:
From the balanced equation above,
4 moles of NH₃ reacted with 6 moles of NO.
Therefore,
10 moles of NH₃ will react with = [tex]\frac{10 * 6}{4}\\\\[/tex] = 15 moles of NO.
From the calculation made above, we can see clearly that only 15 moles of NO out of 30 moles reacted completely with 10 moles of NH₃.
Therefore, NH₃ is the limiting reactant and NO is the excess reactant.
Learn more: https://brainly.com/question/19484093
Outline the steps for a mass-mass stoichiometry problem.
8. List the 4 questions to answer when you find the charge on an ion
Answer:
Hope it helps u
Explanation:
FOLLOW MY ACCOUNT PLS PLS
Questions about the kind of charge, the magnitude of charge etc can be asked when the charge on an ion is determined.
What is an ion?An ion is a charged atom or a charged molecule. It attains a charged state because the number of electrons does not remain equal to the number of protons in the atom or the molecule.
The gain of a positive charge by an atom or a negative charge will depend on the fact that whether the number of electrons in an atom is greater than the number of protons or less than the number of protons.
If the atom loses electrons, the total proton number will be higher, so the atom will become positive. If the atom gains electrons, the total electron number will be higher, so the atom will be negative.
The attraction of an atom to another atom happens because it has an unequal number of electrons and protons, then the atom is called an ION. If the atom has more electrons than protons, it is a negative ion or ANION. If it has more protons than electrons, it is a positive ion.
Read more about ions, here
https://brainly.com/question/1488567
#SPJ2
Explain A student wants to increase the maximum amount of sugar that can dissolve in water. She crushes the sugar and then stirs it into the water. Does this work?
Explanation:
When the student crushes sugar there there occurs an increase in the number of molecules or particles of sugar. This means that now more number of sugar particles (solute) are able to interact with water (solvent).
Therefore, there will be more number of collisions taking place between the solute and solvent molecules.
As a result, sugar will dissolve readily into water as there is an increase in interaction between solute and solvent particles.
Thus, we can conclude that when he crushes the sugar and then stirs it into the water then it will work as this leads to more interaction or collisions between the solute and solvent particles.