Answer:b
Explanation:
I searched it
Need organic chemistry 11th grade
for practice and 1 question is enough :)
Answer:
ok all you need is a little study
Explanation:
organic chemistry isn't something to worry about is something that is a very simple concept if you understand what you're doing so a little bit of studying will help you go through it and you really don't this is not the topics that you will really understand if you just go through it as once so there is no need to worry about organic chemistry it is very simple concept just learning you are a you are close just learn all those simple aspects alkane etc it's very easy
In the reaction
Cu° + 2 H2SO4 → CuSO4 + 2 H2O + SO2,
copper is
A) reduced and is the oxidizing agent
B) reduced and is the reducing agent
C) oxidized and is the oxidizing agent
D) oxidized and is the reducing agent
Some one help me with these real quick I need help with questions 4 & 6.!
Answer:
4 is chemical and 6 is a
Explanation:
hope this helps
What is the molarity of a solution prepared by adding enough water to 2 g of acetone to make a total volume of 1.60 l?
Explanation:
answer is in photo above
URGENT HELP
26. A solution of hydrogen peroxide is 23.3% H2O2 by mass and has a density of 1.11
g/cm”. The molarity of the solution is:
a) 7.14 M
b) 0.259 M
c) 7.60 M
d) 7.93 M
e) none of these
4 Calculate the mass of tin that can be extracted from 100 kg of tin ore that contains
1% tin by mass. Calculate the mass of waste produced.
Answer:
formula for calculating mass is
first U will HV to find number of moles
m=n×M
Use the average acceleration obtained in Activity 1 to determine how far the ball should drop at 0.3 second, 0.5 second, and 0.7 second. Using the simplified formula y = 1/2 at2 (because y0 = 0 and v0 = 0), calculate y to one decimal place.
Answer:
0.3 sec : -0.4 m
0.5 sec: -1.2 m
0.7 sec: -2.3 m
Explanation:
0.3 sec: 1/2(-9.3 m/s^2)(0.3 s)^2 = -0.4 m
0.5 sec: 1/2(-9.3 m/s^2)(0.5 s)^2 = -1.2 m
0.7 sec: 1/2(-9.3 m/s^2)(0.7 s)^2 = -2.3 m
When an Li atom becomes an Li+ ion, the Li atom
Answer:When a lithium atom forms an Li+ ion, the lithium atom (1) gains a proton (2) gains an electron (3) loses a proton (4) loses an electron
What is the structure of an amino acid? A. Amino group, phosphate group, pentose sugar, nitrogen base B.Amino group, R group, carboxylic acid group C. Amino group, disulfide group. R group D. Phosphate group, pentose sugar, nitrogen base
Amino acids are the monomers that make up proteins. Each amino acid has the same fundamental structure , which consists of a central carbon atom, also known as the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom.
Amino group, R group, and the carboxylic acid group. Hence, option B is correct.
What are Amino acids?Amino acids are the monomers that makeup proteins.
Each amino acid has the same fundamental structure, which consists of a central carbon atom, also known as the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom.
Hence, option B is correct.
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Please help please help
Answer:
The mass percentage of chlorine is 60.66 % chlorine in the compound sodium chloride.
Explanation:
Please answer the question
Answer:
Oxygen is the nearest noble gas
List the two pairs of atoms referred to in the
previous question in order of increasing ionic
character of the bonding between them.
Which statements are correct regarding the Law of Conservation of Matter and Energy?
Matter or energy can create itself.
Matter or energy was created by known principles of physics and chemistry.
Matter or energy can change from one form to the other.
The law agrees with the Biblical account of Creation
(more than one answer)
Answer:
Matter or energy can change from one form to the other
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed but can only be transformed i.e. changed from one form to another. For example, mechanical energy can be changed to electrical energy.
Likewise, the law of conservation of mass/matter states that matter can not be destroyed or created but can change via physical or chemical means to conserve it. For example, matter can change from liquid state to gaseous state.
From the above two laws, it can be said that "matter or energy can change from one form to the other".
Please help please help
Answer:
sry I don't know much about chemistry
Define the boiling and evaporation using kinetic theory
Answer:
Explanation:
By the kinetic molecular theory (particle model), all matter consists of particles, there are spaces between the particles, the particles are in constant random motion, and there are forces of attraction and repulsion between the particles.
Furthermore, temperature is defined to be a measure of the average kinetic energy of the particles.
Evaporation is a change of phase from liquid to gas explained as follows :
When particles in the liquid phase are heated, they gain kinetic energy and move faster and further apart. Eventually they have enough energy to escape the forces of attraction holding them together in the liquid phase and they move very fast and far from each other and exist in the gaseous phase.
In the chemical reaction between aqueous magnesium chloride and sodium metal, what chemical amount (mol) of magnesium metal can be precipitated (produced) with 12.6 mol of sodium metal?
Answer:
6.3moles
Explanation:
The balanced equation of the reaction described above between aqueous magnesium chloride and sodium metal is as follows:
MgCl2(aq) + 2Na(s) → 2NaCl(aq) + Mg(s)
From the above equation, 2 moles of sodium metal (Na) produces 1 mole of Magnesium metal (Mg)
Hence, 12.6 mol of Na will produce (12.6/2) mol of Mg.
12.6/2 = 6.3moles of Mg metal.
The reactants of two chemical equations are listed.
Equation 1: CuSO4 and NaOH
Equation 2: Fe and CuSO4
Based on the type of reaction, which reaction can be used to extract copper metal from copper sulfate solution?
A - Equation 2, because Fe being more reactive, replaces Cu from CuSO4
B - Equation 2, because Fe being more reactive, replaces S from CuSO4
C - Equation 1, because Na being more reactive, exchanges position with Cu in CuSO4
D - Equation 1, because Na being more reactive, exchanges position with S in CuSO4
The reaction that can be used to extract copper metal from copper sulfate solution would be equation 2.
Fe will displace Cu from CuSO4 because it is more reactive. In other words, Fe ranks higher than Cu in the reactivity series.
Thus: [tex]Fe + CuSO_4 ---> Cu + FeSO_4[/tex]
Even though Na will displace Cu from CuSO4, equation 1 will result in the formation of Cu(OH)2 instead of free Cu because it is a double replacement reaction.
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SOMEONE HELP chemistry
AMSWER IN THE ATTACHMENT.
is it true that the most reactive metals are quite plentiful in the Earth's crust?
Answer:
yes
Explanation:
as it had got crushed down in the dinosaurs age
Which describes the molecule below?
O
A. A lipid with three unsaturated fatty acids
O
B. A lipid with three saturated fatty acids
O C. A lipid with two unsaturated fatty acids and one saturated fatty
acid
O D. A lipid with two saturated fatty acids and one unsaturated fatty
acid
The molecule is described as the, A. lipid with three unsaturated fatty acids.
A collection of two or more atoms bonded together by attractive forces known as chemical bonds is referred to as a molecule. In the given question, the molecule shown in diagram is a lipid, or triglyceride, with three fatty acids and a glycerol backbone. Unsaturated fatty acids are those with double or triple bonds in their molecular makeup.
Depending on how many double or triple bonds are typically there in its structure, a fatty acid can either be polysaturated or monounsaturated. Generally, there are three unsaturated fatty acids in this lipid, all of which contain one double bond in their structures.
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PLEASE HELP ASAP Put these events in order, from earliest to latest.
-the first fusion bomb is tested
-uranium atoms are split
-atomic bombs are dropped on Japan at the end of world war ll
-the first nuclear-powered submarine is put into action
-Enrico fermi creates the first known nuclear chain reaction
Answer:
1) Uranium atoms are split
2) Enrico Fermi creates the first known nuclear chain reaction
3) Atomic bombs are dropped on Japan at the end of WWll
4) The first fusion bomb is tested
5) The first nuclear-powered submarine is put into action
Increasing the concentration increases the speed of reaction by... increasing the number of collisions between products increasing the amount of energy in the system increasing the number of collisions between reactants lowering the activation energy of the reaction
Answer: increasing the number of collisions between reactants
Explanation:
A reaction is possible due to collisions between the reactants to create products. If we increase the concentration of reactants then that means that we are increasing the molecules of the reactants which would give them more chances to collide and make products.
For instance, using a non-chemistry example, if there are few cars in a large city, the accidents there will be less because the cars will have such space that they wouldn't collide with each other. If the number of cars in the city is increased however, there is now less space and more chances for cars to collide.
The ksp of StS04 is 3.2x10-7 What is the equilibrium concentration of sulfate lon a 1.0-L solution of strontium sulfate to which 0.10 mol of Sr(CH3CO2)2 has been added?
Answer:ehwusvudhwdvwxkwvbxbwxbxiwhxjvwxjvxwjxvjxvwxiwvxiwzgiwxvwjsbwis
HOPE IT HELPS IF YOU LIKE MY ANSWER THEN MARK ME AS BRAINLIEST ;-);-)
Question 24 Multiple Choice Worth 2 points)
[BWS.02] Why is science important for society?
Answer:
Because the scientific knowledge itself helps solve many basic human needs and it also improves how humans live and their standards. For example, without science medications wouldn´t exist and many technological devices we use now-a-days. We´re surrounded by science, we just don´t really notice it.
A student who is performing an experiment must measure out 0.02-mL of 0.50-M HCl. The most accurate piece of equipment to measure the quantity would be a?
A) 50 mL buret
B) 25 mL graduated cylinder
C) 10 mL cylinder
D) 1 mL pipet
Answer:
Choice D) 1 mL pipet
Explanation:
If you are trying to extract 0.02 mL of HCl, you are going to need a piece of equipment that can measure very small units. Thus, Choice D would be the correct answer.
Se trata 50 g de aluminio que posee 10% de impurezas con suficiente cantidad de ácido sulfúrico ¿qué peso de sulfato de aluminio se obtiene si el porcentaje de rendimiento fue de 70%? P.A. (uma): Al: 27, S = 32, O = 16
Respuesta:
199.5 g
Explicación:
Paso 1: Escribir la reacción balanceada
2 Al + 3 H₂SO₄ ⇒ Al₂(SO₄)₃ + 3 H₂
Paso 2: Calcular la masa pura de 50 g de Al
Aluminio tiene 10% de impurezas, es decir, 10% de 50 g = 5 g. Luego, tiene 50 g - 5 g = 45 g de Al puro.
Paso 3: Calcular la masa teórica de Al₂(SO₄)₃ obtenida a partir de 45 g de Al
La relación de masas de Al₂(SO₄)₃ a Al es 342:54.
45 g Al × 342 g Al₂(SO₄)₃/54 g Al = 285 g Al₂(SO₄)₃
Paso 4: Calcular la masa real de Al₂(SO₄)₃ obtenida
El rendimiento de la reacción es de 70%.
285 g × 70% = 199.5 g
Bacteria, viruses, parasites, and mold are examples of which category of hazard-causing agents?
Answer:
abiotic infectious agent
Explanation:
not sure tho
sucrose (sugar)crystals obtained from sugarcane and bet root are mixed together .with it be a pure substancesor a mixture ?give reasons
Answer:
It will be a pure substance (compound) because chemical composition of sugar crystals will be the same whether obtained from sugarcane or from beet root.
hope it's help you plz mark as brain list ...!!An atom has an atomic number of 19 and mass number of 39 how many electrons and protons does it have?
Answer:
19 protons, 20 neutrons and 18 electrons.
Explanation:
The atomic number gives the number of protons 19
p = 19
The atomic mass is the sum of the protons and neutrons
p + n = 39 p = 19
put p into the equation and solve for n the neutrons.
19 + n = 39
Subtract 19 from both sides
19 − 19 + n = 39 − 19
n = 20
The number of electrons equals the number of protons in a neutral atom. The positive charge equals the negative charge. The negative charge is the number of electrons. This ion has a charge of +1. So solve for the negative charge.
− 19 + 1 = − 18
The negative charge is -18 so
e = 18
Which of the following would be expected to have the lowest boiling point?
CH3CH2CH2CH3, CH3CH2NHCH3, NH2CH2CH2NH2, CH3CH2CH2NH2
O CH3CH2NHCH3
O NH2CH2CH2NH2
O CH3CH2CH2NH2
O CH3CH2CH2CH3
Answer:
CH3CH2CH2CH3
Explanation:
The boiling point of a compound depends on the nature of intermolecular interaction between the molecules of the compound.
If a molecule is nonpolar and has a low molecular mass, then its molecules are most likely held together only by weak intermolecular bonds such as dispersion forces. These forces are easily broken and the molecules move apart hence the molecule possess a low boiling point.
Polar molecules and molecules having higher molecular mass tend to have higher boiling points.
Among all the compounds listed, CH3CH2CH2CH3 is non polar and has the lowest molecular mass hence it exhibits the least boiling point.
