Write a balanced equation for the combustion reaction that occurs between propane and oxygen. and limiting reactant
Final answer:
The balanced chemical equation for the combustion of propane is C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l). To find the limiting reactant, convert the mass of the reactants to moles, then compare the mole amounts to the ratio in the balanced equation.
Explanation:
Combustion of Propane
The balanced chemical equation for the combustion of propane is:
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)
To determine the limiting reactant, compare the mole ratio of the reactants to the amounts you have. For propane and oxygen, the mole ratio is 1:5. In the given problem, 30.0 g of propane (C3H8) reacts with 75.0 g of oxygen (O2). First, convert the mass of each reactant to moles using their molar masses (propane: 44.10 g/mol, oxygen: 32.00 g/mol). Then compare the mole amounts given the ratio required by the balanced equation. The reactant that provides the smaller number of moles required by the ratio is the limiting reactant.
number of grams in four moles of BaCO3
When atoms are split, from which part of the atom is the energy released?
nucleus
electrons
isotopes
Answer: Option (a) is the correct answer.
Explanation:
It is known that an atom consists of three sub-atomic particles which are protons, neutrons, and electrons.
When an atom splits then only neutrons and protons are involved and no electrons are involved into the reaction.
Hence, energy is released by the nucleus of the atom. And, these type of reactions reactions are known as nuclear reactions.
For example, [tex]^{16}_{8}O + ^{1}_{1}n \rightarrow ^{13}_{7}N + ^{4}_{2}He[/tex]
Whereas isotopes are the species which have same atomic number but different mass number.
Thus, we can conclude that when atoms are split, from nucleus of the atom is the energy released.
How many calories of heat energy are required to melt 20 grams of ice at 0 °c?
Part a use valence bond theory to devise a hybridization and bonding scheme for co2. match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.
PLEASE HELP!
The location of the dot is _____.
Latitude/Longitude
30° N/60° W
30° N/60° E
60° N/30° W
60° N/60° E
Answer:
the answer is D: 60o N/60o E
Explanation:
sorry i had to but a o for a degrees sign :)
Answer:
it is a. 30° N/60° W
Explanation:
The solar system formed from the
A. grouping together of asteroids.
B. explosion of an interstellar sun.
C. collision of two massive stars.
D. collapse of an interstellar cloud.
The ksp of cadmium carbonate, cdco3, is 1.0 × 10-12. calculate the solubility of this compound in g/l.
The solubility of cadmium carbonate, CdCO3, in a 0.010-M solution of cadmium bromide can be calculated using the compound's Ksp value. The molar solubility is found to be 1.0 × 10^-6 M. Converting this to grams per liter gives a solubility of 1.724 × 10^-4 g/L.
Explanation:The solubility of cadmium carbonate, CdCO3, can be determined using the Ksp value. The Ksp value represents the product of the concentrations of the dissolved ions in a saturated solution. In this case, the Ksp of CdCO3 is 1.0 × 10^-12. Since the compound dissociates into Cd2+ and CO3^2- ions, the solubility can be calculated by assuming x as the molar solubility of CdCO3. Thus, [Cd2+] = x and [CO3^2-] = x. Plugging in these values into the Ksp expression, we get:
(x)(x) = 1.0 × 10^-12
x^2 = 1.0 × 10^-12
x = √(1.0 × 10^-12) = 1.0 × 10^-6 M
Since the question asks for the solubility in g/L, we need to convert the molar solubility to grams per liter. We can use the molar mass of CdCO3, which is approximately 172.4 g/mol. Therefore, 1.0 × 10^-6 M is equivalent to 1.724 × 10^-4 g/L.
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Based on a kc value of 0.200 and the given data table, what are the equilibrium concentrations of xy, x, and y, respectively? express the molar concentrations numerically.
Without additional data from the data table regarding initial concentrations and change, we cannot calculate the equilibrium concentrations of XY, X, and Y based on the provided Kc value. An ICE table and the presumed small value of x in concentration changes are needed to employ the equilibrium constant effectively.
To calculate the equilibrium concentrations of XY, X, and Y based on the given Kc value of 0.200, we need additional data from the data table. The statement mentions XY, X and Y but only provides information about X2, Y2, and Ke. Assuming we are dealing with a chemical equilibrium that can be represented as:
X2 + Y2 → 2XY
A mathematical expression for the equilibrium constant Kc can be written as:
[tex]Kc = [XY]^2 / ([X2][Y2])[/tex]
Since an ICE table and initial concentrations are not provided in the question, we cannot calculate the equilibrium concentrations without that information. Additionally, Ke may refer to the equilibrium constant in terms of pressure (Kp), so it's unclear how to proceed without more context. The provided value of Ke or Kc needs to be used with the initial concentrations to determine equilibrium concentrations after setting up an ICE (Initial, Change, Equilibrium) table. Typically, to find x (the change in concentration), we assume x is small and can be ignored in the expressions (0.78 - x) and (0.21 - x) considering the very small Kc value, leading to a simplification in solving the equation for x, if applicable.
A carbon compound X turns blue litmus to red and has a molecular formula C2H4O2.Identify X and draw its structure.Write a chemical equation for the reaction and name of the product formed in each case when X reacts with
a. ethanol in the presence of conc.H2SO4 (
b. sodium carbonate
Answer: Substance X is ethanoic acid and the reactions are given below.
Explanation:
A compound having molecular formula of [tex]C_2H_4O_2[/tex] which turns blue litmus to red is considered as an acid.
The compound is ethanoic acid which is generally termed as acetic acid.
Thus, the compound X is acetic acid.
The chemical equations for the reaction of X with
a. Ethanol in the presence of [tex]H_2SO_4[/tex]When acetic acid reacts with etahnol in the presence of an acid, it leads to the formation of a fruity smelling compound known as ester which is ethyl acetate.
[tex]CH_3COOH+CH_3CH_2OH\xrightarrow[]{H_2SO_4}CH_3COO-CH_2CH_3+H_2O[/tex]
b. Sodium carbonateWhen acetic acid reacts with sodium carbonate, it leads to the formation of sodium acetate, carbon dioxide and water.
[tex]2CH_3COOH+Na_2CO_3\rightarrow 2CH_3COONa+CO_2+H_2O[/tex]
A sample of neon occupies a volume of 375 ml at stp. What will be the volume of neon If the pressure is reduced to 90.0 KPA?
A. 422 ml
B. 422 L
C. 333 ml
D. 333 L
At STP conditions value of absolute pressure is 101.325 kPa.
From the given data we can determine the new volume of neon using following proportion:
V : V1 = p : p1
375 : V1 = 101.325 : 90
101 * V1 = 90 * 375
V1 =33750/101 =333ml
guyys .... please this is really urgent.....................short definition for sea breeze and land breeze.......10 points
A sea breeze is a wind that blows from the sea to the warmer land during the day, while a land breeze blows from the land to the sea at night due to differences in temperature creating distinct pressure areas.
Land Breezes and Sea Breezes Defined
A sea breeze is a local wind pattern that occurs during the day or summer when the land heats up faster than the water. As a result, lower pressure forms over the land, drawing cooler, higher pressure air in from the sea towards the land to replace the rising warm air. Conversely, a land breeze occurs at night when the land cools down more quickly than the water, creating higher pressure over the land and lower pressure over the water.
This causes air to move from the land out towards the sea. Both phenomena are examples of land/sea breezes which occur due to differential heating and cooling of land and water, creating pressure gradients that drive local winds.
In which medium would light have the longest wavelength? water air glass diamond
the answer is b air
Why does a blue shirt look blue? Choose the BEST explanation.
Question 2 options:
The shirt reflects all wavelengths of light.
All wavelengths of light are absorbed by the shirt.
The shirt absorbs the blue wavelengths.
The shirt reflects the blue wavelengths.
The nucleus of an isotope of sulfur contains 34 neutrons. what is the atomic number of this isotope?
Silver has a density of 10.5 g cm3 and gold has a density of 19.3 g/cm3. which would have the greater mass, 5cm^3 of silver or 5cm^3 of gold?
Which of these agreements has goals of peace and shared scientific research?
A. Environmental Protection Treaty
B. Migratory Bird and Game Mammal Treaty
C. Antarctic Treaty System
D. Ramsar Convention
Option C, Antarctic Treaty System, is the right answer.
The Antarctic Treaty System, control global connections with regard to Antarctica; the only continent of the earth without the native population of human beings. In other words, the ATS is the entire system of adjustments developed for the intention of managing associations among states in the Antarctic. The main goal of the ATS is to guarantee "in the affair of all humankind that Antarctica shall proceed always to be practised completely for peaceful objectives and shall not become the view or gadget of universal disharmony.
Answer:
The correct answer is "Antarctic Treaty System"
Explanation:
The Antarctic treaty system signed the first arms control agreement. It bans any form of military agreement on the Antarctic, and promotes free scientific investigation. The treaty was signed by 12 countries during the era of the cold war. The only use of military is for peaceful purposes and scientific investigations. It promotes free exchange of scientific knowledge and personnel.
What is the mass of a 10.0 ml sample of urine with a specific gravity of 1.04?
One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate. how many kilocalories, to two significant figures, does this sample contain? (the caloric values are: 4 kcal/g for carbohydrate, 9 kcal/g for fat, and 4 kcal/g for protein.)
One cup of kidney beans with 15 g of protein, 1 g of fat, and 42 g of carbohydrate contains approximately 237 kilocalories, when calculated using the given caloric values for each macronutrient.
Explanation:To calculate the number of kilocalories in a cup of kidney beans that contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate, we can use the given caloric values of 4 kcal/g for carbohydrates, 4 kcal/g for protein, and 9 kcal/g for fat.
The total kilocalories can be calculated as follows:
Carbohydrate kilocalories = 42 g × 4 kcal/g = 168 kcalProtein kilocalories = 15 g × 4 kcal/g = 60 kcalFat kilocalories = 1 g × 9 kcal/g = 9 kcalAdding these together gives:
168 kcal from carbohydrates + 60 kcal from protein + 9 kcal from fat = 237 kilocalories in total.
Therefore, one cup of kidney beans contains approximately 237 kilocalories, to two significant figures.
A 425-ml sample of hydrogen is collected above water at 35°c and 763 torr. find the volume of the hydrogen sample when the temperature falls to 23°c, assuming the barometric pressure does not change. (vapor pressures of water : at 35°c, 42.2 torr ; at 23°c, 21.1 torr)
Volume of hydrogen sample at [tex]23^\circ\text{C}[/tex] is [tex]\boxed{419.4\text{ mL}}[/tex].
Further Explanation:
Ideal gas equation:
A hypothetical gas comprising of many randomly moving particles having perfectly elastic collisions between them is called ideal gas. The expression for ideal gas equation is mentioned below.
[tex]\text{PV}=\text{nRT}[/tex] ...... (1)
Here,
P is the pressure of gas.
V is the volume of gas.
T is the absolute temperature of gas.
n is the number of moles of gas.
R is the universal gas constant.
At temperature [tex]\text{T}_{1}[/tex] , volume [tex]\text{V}_{1}[/tex] and pressure [tex]\text{P}_{1}[/tex] , ideal gas equation for hydrogen gas modifies as follows:
[tex]\text{P}_{1}\text{V}_{1}=\text{nRT}_{1}[/tex] ...... (2)
At temperature [tex]\text{T}_{2}[/tex] , volume [tex]\text{V}_{2}[/tex] and pressure [tex]\text{P}_{2}[/tex] , ideal gas equation for hydrogen gas modifies as follows:
[tex]\text{P}_{2}\text{V}_{2}=\text{nRT}_{2}[/tex] ...... (3)
Dividing equation (3) by equation (2),
[tex]\dfrac{\text{P}_{2}\text{V}_{2}}{\text{P}_{1}\text{V}_{1}}=\dfrac{\text{T}_{2}}{\text{T}_{1}}[/tex] ...... (4)
Rearrange equation (4) to calculate .
[tex]\text{V}_{2}=\dfrac{{\text{P}_{1}\text{V}_{1}\text{T}_{2}}}{\text{P}_{2}\text{T}_{1}}[/tex] …… (5)
The value of [tex]\text{P}_{1}[/tex] can be calculated as follows:
[tex]\begin{aligned}\text{P}_{1}=&763\text{ torr}+42.2\text{ torr}\\=&805.2\text{ torr}\end{aligned}[/tex]
The value of [tex]\text{P}_{2}[/tex] can be calculated as follows:
[tex]\begin{aligned}\text{P}_{2}=&763\text{ torr}+21.1\text{ torr}\\=&784.1\text{ torr}\end{aligned}[/tex]
The value of [tex]\text{T}_1[/tex] can be calculated as follows
[tex]\begin{aligned}\text{T}_1=&\left(35+273.15\right)\text{ K}\\=&\ 308.15\text{ K}\end{aligned}[/tex]
The value of [tex]\text{T}_2[/tex] can be calculated as follows
[tex]\begin{aligned}\text{T}_2=&\left(23+273.15\right)\text{ K}\\=&\ 296.15\text{ K}\end{aligned}[/tex]
Substitute 805.2 torr for [tex]\text{P}_{1}[/tex] , 425 mL for [tex]\text{V}_{1}[/tex] , 784.1 torr for [tex]\text{P}_{2}[/tex] , 308.15 K for [tex]\text{T}_{1}[/tex] and 296.15 K for [tex]\text{T}_{2}[/tex] in equation (5).
[tex]\begin{aligned}\text{V}_{2}&=\dfrac{\left({805.2\text{ torr}\right)\left(425\text{ mL}\right)\left(296.15\text{ K}\right)}}{\left(784.1\text{ torr}\right)\left(308.15\text{ K}\right)}\\&=419.4\text{ mL}\end{aligned}[/tex]
Therefore volume of hydrogen sample at [tex]23^\circ\text{ C}[/tex] comes out to be 419.4 mL.
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Ideal gas equation
Keywords: ideal gas equation, R, T, n, P, V, T1, T2, P1, P2, V1, V2, 419.4 mL, pressure, volume, universal gas constant.
Which renewable energy source depends on changing water levels?
Which of these items best describes the arrangement of electrons in an atom of sulfur? A. Two electrons in its first energy level; eight electrons in its second energy level; six valence electrons in its outermost energy level B. Two electrons in its first energy level; two electrons in its second energy level; eight electrons in its third energy level; four valence electrons in its outermost energy level C. Two valence electrons in its first energy level; eight electrons in its second energy level; six electrons in its outermost energy level D. Eight electrons in its first energy level; eight valence electrons in its outermost shell
THE ANSWER TO THIS QUESTION IS B IF YOU USING PF
SUPER EASY!
12 POINTS
Choose all that apply.
Which of the following contribute to your body's digestive process?
muscle
movements
chemical reactions
physical processes
respiration
You need to measure the brightness of a light bulb using the metric system. In which unit do you express your measurement?
A. meter
B. liter
C. kilogram
D. candela
***My answer: D. Candela
because candela is the unit of light intensity...
idk if that applies here?? :) please explain!! thanks :)
what is the sequence in which energy is converted to allow a gasoline-powered car to move.
The energy conversion or the energy transformation is the process of changing one form of energy to another , the energy produces certain changes within a system , Changes in the total energy of systems can only be accomplished by adding or removing the energy from them as the energy is a quantity which is conserved ( unchanging ) .
The internal combustion engine in the car converts the potential chemical energy in gasoline and oxygen into thermal energy which is transformed into the mechanical energy that accelerates the vehicle ( increasing its kinetic energy ) by causing the pressure and performing the work on the pistons .
Given that the vapor pressure of water is 17.54 torr at 20 °c, calculate the vapor-pressure lowering of aqueous solutions that are 2.20 m in (a) sucrose, c12h22o11, and (b) aluminum chloride. assume 100% dissociation for electrolytes.
= [tex]\frac{1000}{18} = 55.55[/tex]
Molarity of the solution = 2.2
The amount of water = moles of solvent
Mole fraction[tex]\frac{55.55}{55.55+2} =0.9619\\\\[/tex]
From Raoults law
Vapor pressure = mole fraction * vapor pressure
= 17.54*0.9619
= 16.87 torr
Lowered vapor pressure
17.54 - 16.87
= 0.67 torr
2. Mole fraction of solvent[tex]\frac{55.55}{55.55+2.2*2} =0.93[/tex]
0.93*17.54 = 16.31
17.54-16.31 = 1.23
The lowered vapor with NACl = 1.23
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What is the oxidation state of an individual nitrogen atom in nh4oh ? express the oxidation state numerically (e.g., +1)?
The oxidation state of an individual nitrogen atom in NH4OH is -3, determined by the rules for assigning oxidation states, where hydrogen is +1 and the ammonium ion has an overall charge of +1.
Explanation:The oxidation state of an individual nitrogen atom in NH4OH can be calculated using the rules for assigning oxidation states. The compound NH4OH consists of the ammonium ion (NH4+) and the hydroxide ion (OH-). To find the oxidation state of nitrogen, we consider that hydrogen generally has an oxidation state of +1 when combined with nonmetals and oxygen has an oxidation state of -2. In NH4+, with four hydrogen atoms, each hydrogen atom contributes +1, for a total of +4. To balance this and give the overall charge of the ammonium ion (+1), the nitrogen must have an oxidation state of -3.
Furthermore, in OH-, the oxygen has an oxidation state of -2, and the single hydrogen has an oxidation state of +1. But since we are only interested in the nitrogen atom, we focus only on the NH4+ part of NH4OH. So, the oxidation state of an individual nitrogen atom in NH4OH is -3.
What new inforamtion can you add the your definition of physical change?
Find the theoretical yield of silicon monocarbide if 50.0 grams of silicon dioxide reacts with carbon. then, calculate the actual amount of silicon monocarbide produced in the lab if the percent yield was 87.2%. (work backwards to find actual yield.)
Final answer:
The theoretical yield of SiC from 50.0 grams of SiO2 is 33.36 grams, and the actual yield is 29.07 grams, based on an 87.2% percent yield.
Explanation:
The theoretical yield of silicon monocarbide (SiC) can be calculated from the stoichiometry of the reaction between silicon dioxide (SiO2) and carbon (C). Given that 50.0 grams of SiO2 are reacting, we first convert this mass to moles using the molar mass of SiO2 (60.08 g/mol). The balanced chemical equation for the reaction is:
SiO2(s) + 3C(s) → SiC(s) + 2CO(g)
Next, we determine the moles of SiC that can be produced from the moles of SiO2, and convert those moles to grams to find the theoretical yield of SiC. To calculate the actual yield, we use the percent yield (87.2%) and apply it to the theoretical yield.
The steps are:
Convert 50.0 grams of SiO2 to moles: n(SiO2) = 50.0 g / 60.08 g/mol.
Use the stoichiometry of the reaction to determine moles of SiC.
Convert moles of SiC to grams, which is the theoretical yield.
Multiply the theoretical yield by the percent yield (87.2%) to determine the actual yield of SiC.
The theoretical yield: n(SiO2) = 50.0 / 60.08 = 0.832 moles of SiO2, which theoretically yields 0.832 moles of SiC since the molar ratio between SiO2 and SiC is 1:1. Now, using the molar mass of SiC (40.10 g/mol), the theoretical yield in grams: 0.832 moles × 40.10 g/mol = 33.36 grams of SiC. The actual yield of SiC is then calculated as: 33.36 g × 87.2% = 29.07 grams.
During pyruvate processing, two carbons from pyruvate combine with ____. see section 9.3 (page 197) .