Answer:
27.63 g of H2.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
8CO + 17H2 → C8H18 + 8H2O
Thus, we can say that:
From the balanced equation above,
8 moles of CO reacted with 17 moles of H2.
Next, we shall determine the number of mole H2 that will react completely with 6.50 moles of CO.
This can be obtained as illustrated below:
From the balanced equation above,
8 moles of CO reacted with 17 moles of H2.
Therefore, 6.5 moles of CO will react with = (6.5 x 17)/8 = 13.813 moles of H2.
Therefore, 13.813 moles of H2 is needed to react completely with 6.50 moles of CO.
Finally, we shall convert 13.813 moles of H2 to grams. This can be achieved by doing the following:
Molar mass of H2 = 2x1 = 2 g/mol
Mole of H2 = 13.813 moles
Mass of H2 =.?
Mole = mass /molar mass
13.813 = mass of H2 /2
Cross multiply
Mass of H2 = 13.813 x 2
Mass of H2 = 27.63 g
Therefore, 27.63 g of H2 is needed for the reaction.
Read the two passages. Silicon is an element that is directly below carbon on the periodic table. Silicon can form bonds similar to carbon. Silicon-silicon single bonds require 222 kJ/mol of energy to break. Based on the statements, how much energy would it take to break a carbon-carbon single bond?
Answer:
100kj/mol
Explanation:
A compound containing oxygen and group 16 and/or group 17 elements contains one of the following elements. The compound dissolves in water. Which element does
the compound contain?
A. Magnesium
B. Potassium
C. Barium
D. Strontium
Explanation:
pottassium its one of covalent bond
The temperature of a sample of gas at 8.5 atm and 59.2 °C increases to 140.0 °C. If the
volume is unchanged, what is the new gas pressure?
Select one:
O a. 10.6
Ob. 20.1
Oc. 6.84
Od. 119
Answer:
since that's the closest option we have
10.6atm
Explanation:
Since volume is constant
P1/T1 = P2/T1
P1 =8.5atm
T1 = 59.2°C = 332.2k
T2 = 140°C = 413k
P2 = ?
8.5/332.2 = P2/413
0.026 = P2/413
P2 = 0.026 x 413
P2 = 10.74atm
What causes hydrogen bonding?
bonding of a covalently bonded hydrogen atom with an unshared electron pair
motion of electrons
attraction between ions
sharing of electron pairs between two adjacent hydrogen atoms
Answer:
the tendency of some atoms in molecules to attract electrons more than their accompanying atom.
Explanation:
Which would cause an electric circuit to lack a current?
open switch
closed switch
lighted bulbs
unlighted bulbs
Answer:
A) open switch
Explanation:
it is an open switch, seeing that when the switch is open, there is a gap between the wire and switch preventing any electric current from flowing. A closed switch is the opposite.
The flow of current is needed to be circuit closed. The electrons are starts following form one end to other end. The lack of current in the circuit is due to open switch.
What is current?Current is said to be the flow of electrons in an electric circuit. The electrons starts flow is mainly due to potential difference.
Current is represented by I.
SI unit of current is Ampere.
In home, the circuit is designed in such a way that, the flow of electricity is controlled by switch. If switch is off mode, there is no electricity flow and glow light or electrical application.
Voltage is the difference in electric potential between two points. Current is just the rate of flow of electric charge.
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Needed to make one s'more: 2 graham crackers, 3 squares of milk chocolate, and 2 marshmallows.
Maddie and her friends are making s'mores over the campfire. they have a bag of 48 marshmallows, 2 packs of graham crackers containing 16 grahams per pack, and 5 chocolate bars that can each be broken into 15 pieces. if maddie's group wants to make s' mores for all, how many can they make and what is the limiting reactant?
Answer:
15
Explanation:
Mr. Avogadro started with 5.14x10^22 atoms of Pa-234. Ten days later Mr. Avogadro calculated the original sample had only 6.43 X 10^21 atoms of Pa-234. What's the half life of Pa-234? PLEASE HELP WILL MARK BRAINLIEST!!
A certain polyatomic ion contains 49 protons and 50 electrons. What's the net charge of this ion?
A. +1
B.-2
C. +2
D. -1
Answer:
The charge - 1
Because the charge of proton is + and electron -
Charge = +49 +(-50)
= - 1
Explanation:
A gaseous substance turns directly into a solid. Which term describes this change?
O deposition
O evaporation
O melting
O sublimation
Answer:
deposition
Explanation:
Sublmation- solid transforming into a gas, skipping the liquid stage.
eveporation- a liquid transformimg into a gas
melting- a solid transforming into a liquid
deposition- the opposite of sublimation (your anwser)
A gaseous substance turns directly into a solid. The term which is indicative of this change is deposition.
Evaporation is a process in which a liquid which when exposed to heat boils and converted into vapors of water. For example, the water is converted into water vapors. Melting is a process in which the solid substance when exposed to heat melts . In this a solid is converted into liquid. For example, a solid ice is melted into liquid. Sublimation is a process in which a solid is converted into a vapor state without being converted into a liquid. For example, dry ice in which the solid dry ice is converted into vapors in presence of air. Deposition is the process in which gaseous molecules aggregate and combine to form a solid. It is opposite of sublimation process. For example, conversion of water vapors to ice.Hence, deposition is the correct option.
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6. The diagram shows the building blocks of a lipid molecule.
A. Determine the name of each type of molecule.
Molecule A:
Molecule B:
B.How many molecules of A normally combine with one molecule of B to form a single fat molecule?
Answer:
A) Molecule A: Fatty acid
Molecule B: Glycerol
B) 3 molecules of molecule A(fatty acid) normally combine with one molecule of B (glycerol) to form a single fat molecule
Explanation:
QUESTION A:
Fats/lipids are one of the four major biomolecules in living systems. They are polymers, and like any polymer, they are made up of monomeric units which serve as building blocks. In the case of fats/lipids, fatty acids and glycerol are the two major building blocks.
Fatty acids are biological compounds made up of a hydrocarbon chain with a terminal carboxyll group (-COOH), which confers its acidic properties upon it. Hence, based on the structural diagram of molecule A in the attached image, it can be observed that the functional group is a carboxyll group. Therefore, molecule A is a FATTY ACID.
Glycerol is a compound with more than one hydroxyll group (-OH) in its chemical structure. It has the chemical formula; C3H8O3 with three hydroxyll groups attached to each of the carbon atoms. Therefore, as observed in the image, molecule B is a GLYCEROL because it contains 3 hydroxyll groups.
QUESTION B:
In the chemical structure of a fat molecule, three fatty acids are attached to each of the three carbon atoms of the glycerol molecule. This is done through the process of esterification i.e. combination of carboxyll group with hydroxyll group. Due to the fact that it takes 3 molecules of fatty acids to combine with one molecule of glycerol, fats are referred to as triglycerides.
Give the IUPAC name of the given compound.
(CH3)-CH(NH2)-CH3
this compound is called 2-propanamine 2 indicates the position of the amino group propan- indicates the radical (joy123333 do they make anyone a mod?)
Based on the electron configuration of the two
atoms, predict the ratio of metal cationic (+) atom
to nonmetal anionic (-) atom in the compound.
Lithium 1s²2s1
Nitrogen 1s22s22p3
Answer:
3:1
Explanation:
Lithium is a group 1 element. This means it would donate one electron to form the cation.
Nitrogen on the other hand is a group 5 element. It would accept 3 electrons to form the anion.
This means there has to be three lithium atoms, each donating an electron each to the nitrogen atom for a compound to be formed.
The formular for the ionic compound would be given as;
Li₃N
Hence the ration is 3:1
Which is the proper order for using a fire extinguisher? pull, aim, squeeze, sweep sweep, squeeze, aim, pull aim, pull, sweep, squeeze pull, sweep, aim, squeeze
Answer:
P.A.S.S
pull, aim, squeeze, sweep.
hope this answer correct (^^)..
Answer:
The proper way of using an extinguisher is:
pull, aim, squeeze and sweep.
Explanation:
P-pull
A-aim
S-squeeze
S-sweep
You can always use this to remember, okay.
Hope it helps.
A reaction between ethene and oxygen is used to produce epoxyethane. When silver is combined with ethene, the reaction for producing epoxyethane occurs much faster. What role does silver play in this chemical process?
A. Silver is a catalyst in this reaction.
B. Silver is a p-type semiconductor in this reaction.
C. Silver causes hydrolysis in this reaction.
D. Silver is an n-type semiconductor in this reaction.
Answer:
A. Silver is a catalyst in this reaction.
Explanation:
The most common use of rare-earth metals is as catalysts in chemical reactions.
To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option A that is Silver is a catalyst in this reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
A reaction between ethene and oxygen is used to produce epoxyethane. When silver is combined with ethene, the reaction for producing epoxyethane occurs much faster. Silver is a catalyst in this reaction.
Therefore, the correct option is option A that is Silver is a catalyst in this reaction.
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Which of these is an example of how engineers have contributed to society?
A. Our current understanding of viruses
B. The theoretical mathematics describing the orbits of planets
around the sun
C. The seven-mile bridge that spans across the Gulf of Mexico to
connect two cities of the Florida Keys
D. Nomadic tribes traveling in search of food to hunt and gather
A sample of oxygen gas has a volume of 45.8 mL when its pressure is 0.492 atm. What
will the volume of the gas be at a pressure of 0.954 atmospheres, if the temperature
remains constant?
Select one:
O a. 23.6
Ob. 0.0102
O c. 88.8
O d. 0.0113
Answer:
a. 23.6Explanation:
[tex]P_1=0.492\:atm\\V_1 = 45.8\:ml\\V_2 = ?\\P_1 = 0.954\:atm\\\\Boyle's Law = P_1V_1 = P_2V_2\\\\Lets \:make\: V \:subject\:of\:the\:formula\\\\\frac{P_1V_1}{P_2} = \frac{P_2V_2}{P_2} \\ \\V_2 =\frac{P_1V_1}{P_2} \\V_2 = \frac{0.492\times45.8}{0.954}\\ \\V_2 = \frac{22.5336}{0.954} \\\\V_2 = 23.620\\\\V_2 = 23.6[/tex]
A solution of Cuso, is labelled 1.743 M. How much Cuso, in grams, must be used to make
1.4957 liter of solution?
Select one:
O a. 416.1
Ob. 0.007301
O c. 166.6
Od. 129.2
Answer:
Option A. 416.1 g.
Explanation:
Data obtained from the question include the following:
Molarity = 1.743 M
Volume = 1.4957 L
Mass of CuSO4 =..?
Next, we shall determine mole of CuSO4 present in the solution.
This is illustrated below:
Molarity is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:
Molarity = mole /Volume
With the above formula, we can obtain the mole CuSO4 present in the solution as follow:
Molarity = 1.743 M
Volume = 1.4957 L
Mole of CuSO4 =..?
Molarity = mole /Volume
1.743 = mole of CuSO4 /1.4957
Cross multiply
Mole of CuSO4 = 1.743 x 1.4957
Mole of CuSO4 = 2.607 moles
Finally, we shall convert 2.607 moles of CuSO4 to grams.
This can be obtained as follow:
Molar mass of CuSO4 = 63.55 + 32.06 + (16x4) = 159.61 g/m
Mole of CuSO4 = 2.607 moles
Mass of CuSO4 =..?
Mole = mass /molar mass
2.607 = mass of CuSO4 /159.61
Cross multiply
Mass of CuSO4 = 2.607 x 159.61
Mass of CuSO4 = 416.1 g
Therefore, 416.1 g of CuSO4 is needed to prepare the solution.
Describe one way in which each of the items you listed in Part 1 could be at least temporarily disrupted from equilibrium. Can you think of a way your body could respond to restore homeostasis after one of these disruptions? (3 points) Think about things that stress the body or do not supply the body's needs properly.
Answer:
Not enough exercise, not enough water, not a healthy diet. Consume fluids regularly during exercise, and drink 16 ounces of fluid for every pound lost during your workout.
Explanation:
To what volume will a 2.33 L sample of gas expand if it is heated from 10.0°C to 100.0°C? Group of answer choices 0.233 L 4.41 L 23.3 L 3.76 L 3.07 L
Answer:
3.07 L
Explanation:
This question describes Charles law, which shows the direct relationship of the absolute temperature to its volume when the pressure is kept constant. The Charles' law equation is:
V1/T1 = V2/T2
Where; V1 is the volume of the gas at an initial state
V2 is the volume of the gas at a final state
T1 is the absolute temperature of the gas at an initial state
T2 is the absolute temperature of the gas at a final state.
According to the question, V1 = 2.33L, V2 = ?, T1 = 10°C, T2 = 100°C
The absolute temperature unit, which is Kelvin, need to be used. Hence, we convert °C to Kelvin using:
T(K) = T(°C) + 273.15
T1 (K) = 10°C + 273.15 = 283.15K
T2 (K) = 100°C + 273.15 = 373.15K
To solve for V2 in the above Charles law equation, we make V2 the subject of the formula by saying:
V2 = V1 × T2 / T1
V2 = 2.33 × 373.15 / 283.15
V2 = 869.4395/ 283.15
V2 = 3.0705
Hence, the gas will be expanded to a volume of 3.07L when heated from 10.0°C to 100.0°C.
how many molecules of water are present in a 5.65 mole sample of water
Answer:
5.65
Explanation:
The chemical equation shown represents photosynthesis. Carbon dioxide plus A plus light with a right-pointing arrow towards B plus oxygen. The arrow has an x above it. What is the role of substance A in photosynthesis? (5 points) Question 4 options: 1) It stores chemical energy for plants and animals. 2) It traps light energy and converts it into chemical energy. 3) It combines with carbon dioxide and light to form glucose. 4) It combines with carbon dioxide and light to form hydrogen.
Answer:
2
Explanation:
crossover formula of potassium oxide.
Answer:
K2O
Explanation:
It carries the chemical formula K2O. Potassium cannot be found free because it is too reactive. It has valency +1 and combines readily with oxygen atoms forming K2O.
hope it helps
What is DNA? A. A Carbohydrate B. A protein C. A nucleic acid D. A lipid
Answer:
C: a nucleic acid
Explanation:
The function of nucleic acids is to store and express genetic information. Since fragments of DNA called genes encode the information to produce certain proteins, they are classified as nucleic acids.
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Calculate the amount of 0.1 M acid needed to neutralize 10,000 liters of pH 8.0 water. The acid is Sulfuric Acid - H2SO4 Show your work for brainliest
Answer:
0.963
Explanation:
pH is the potential of hydrogen that can be determined by the hydrogen or hydroxide ion concentration. 10 mL is the amount required of 0.1 M to neutralize.
What is pH?pH estimates the acidic and the basicity of the solution when a solute is dissolved in the solvent.
Sulfuric acid is dissociated as:
H₂SO₄(aq) ⇌ H⁺(aq) + HSO₄⁻(aq)
pH is calculated as:
pH = -log [H⁺]
[H⁺] = 1x10⁻⁸ M
The moles in 10,000 L is, 10000L × 1x10⁻⁸ = 0.0001 moles
Moles of sulfuric acid required:
0.0001 moles × ( 1 mol H2SO4 ÷ 1 mol H⁺) = 0.001 moles
Further, volume is calculated as:
0.001 × (1L ÷ 0.1moles) = 0.01 L
Therefore, 10 mL of 0.1 M acid is needed to neutralize.
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Which molecule contains a total of seven carbon atoms?
2-methyl-heptyne
2-methyl-propane
3-methyl-2-hexene
3-methyl-1-pentene
Answer:
3-Methylhex-2-ene
Explanation:
You count the atoms in the stems of the names and add them up.
C. 3-Methylhex-2-ene
Methyl = 1C
Hexene = 6C
Methylhexene = 7C
A. 2-Methylhept-1-yne is wrong. It has 1C + 7C = 8C
B. 2-Methylpropane is wrong. It has 1C + 3C = 4C
D. 3-Methylpent-1-ene is wrong. It has 1C + 5C = 6C
Which of the following statements is true?
A Question Progress A
A. Factors that affect the reaction rate can increase the speed of a reaction but not the
yield.
O
B. None of these
C. Catalysts are important to industry to increase product yields
D. A reaction can be sped up by reducing the surface area of solid reactants.
Reset Selection
Answer:
c
Explanation: c
The statement that is true from the following is catalysts are important to the industry to increase product yields. The correct option is C.
What is a catalyst?Catalysts are substances that speed up or increase the rate of reaction. The biological catalysts are enzymes. Enzymes are made up of proteins, and they are used in the reaction to increase the yield in less time. Catalyst does not mix with the process and after the reaction.
There are many chemical catalysts like nickel and iron. These catalysts are used in chemical and manufacturing processes. They impact, accelerate, and promote the reaction to get different yields.
Thus, the correct option is C. Catalysts are significant to industry to increase product yields.
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What is the percent yield of lithium hydroxide from a reaction of 7.40g of lithium with 10.2g of water? The actual yield was measured to be 12.1g.
Answer:
[tex]\boxed{Percentage \ Yield = 47.6 \ percent}[/tex]
Explanation:
The balanced chemical reaction is
[tex]2Li + 2H_{2}O \ \ \ -> \ \ \ 2LiOH + H_{2}[/tex]
For the balanced reaction, we've
Lithium = 14 g
Water = 36 g
LiOH = 48 g
Hydrogen gas = 2 g
So,
14 g of lithium = 48 g of lithium hydroxide
And we have:
7.40 g of lithium = x grams of lithium hydroxide
Cross Multiplying,
x grams = [tex]\frac{48*7.4}{14}[/tex]
Grams of lithium = 25.4 g of lithium hydroxide
So, Theoretical Yield = 25.4 g of lithium hydroxide
Now, The %age yield:
%age Yield = [tex]\frac{Actual \ Yield}{Theoretical \ Yeild } * 100[/tex]
%age Yield = [tex]\frac{12.1}{25.4} * 100[/tex]
%age Yield = 47.6%
Why is warm honey easier to pour than cold honey?
A) Increasing the temperature breaks the molecules down into atoms, which are smaller.
B) Increasing the temperature increases the kinetic energy of the molecules, which makes it easier to overcome the attractive forces between molecules.
C) Increasing the temperature converts the sugars into water, which flows easier.
D) Increasing the temperature makes the honey more viscous.
Explanation:
Warm honey is easier to pour because the molecules or what we call as atoms are tightly packed in solids and when solids convert into liquid they flow easily.I HOPE YOU MIGHT FIND THIS VERY HELPFULLWITH LOVE FAULTYDEVILLOVE YA......warm honey easier to pour than cold honey due to Increasing the temperature converts the sugars into water, which flows easier.
What are the components of honey ?
Honey contains sugar, water and other ingredients, where Sugar gives gives sweetness, water maintain fluidity, and other components are present in a least amount and the differences are the color, aroma and taste.
Three types of sugar such as fructose (41%), grape sugar or glucose about 34% and sucrose contain 1 and 2%, other components include minerals, proteins, acids and undetermined matter.
Minerals constitute 3.68%, increase the value of honey for human consumption and the most common minerals are potassium, chlorine, sulfur, calcium, sodium, phosphorus, magnesium, silicon, iron, manganese and copper.
Proteins are collected from nectar and pollen which is the integral parts of plants, acids are also the component, vitamn C and some B complex vitamins such as riboflavin, pantothenic acid, pyridoxine, biotin, nicotinic acid are present.
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In what type of reaction is a C=C or C≡C bond created?
Answer:
A carbon–carbon bond is a covalent bond between two carbon atoms.
Explanation:
What type of solid consists of positive metal cations surrounded by valence electrons that
are donated by the metal atoms and belong to the solid as a whole?
Select one:
O a. ionic
O b. covalent network
O c. metallic
O d. covalent molecular