Answer:
C3H7NO2
Explanation:
The chemical formula of Alanine is C3H7NO2 and it belongs to almost all food category because it is present in one food of each food category such as dairy products, meat, nuts, soy, and whole grains etc. Alanine is a nonessential amino acid means that it does not directly obtained from the diet but it can be produced by the body using raw materials present in the food.
What does the fossil record tell us about the evolution of the hominin skull?
The face grew wider as hominins evolved
The face stuck out farther from the rest of the skull as hominins evolved
The part of the skull surrounding the brain grew larger as hominins evolved
The part of the skull surrounding the brain grew more pointed as hominins evolved
Answer:
The part of the skull surrounding the brain grew larger as hominins evolved
The skulls are all casts of the original fossils. By determining the skulls we can explore the characteristics which reflect the evolutionary relationships. The part of the skull surrounding the brain grew larger as hominins evolved. The correct option is C.
What is hominin evolution?Hominin evolution is characterized by two mains trends, transition to bipedality and increase in brain size. Fossil evidence shows that both trends had a major impact on the structure and function of the hominin skull.
Hominins or homo species are characterized by relatively and absolutely large brains, a modern skeleton, reduced tooth and jaw size and an involvement in cultural activities. Hominins have a larger cranial capacity and this is an indication of their brain size.
In addition, the contour of the hominin forehead eventually shifted from being angled to more vertical.
Thus the correct option is C.
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Suppose you are provided with a 36.89 g sample of potassium chlorate to perform this experiment. What is the mass of oxygen you expect
to release upon heating?
Answer:
14.45 g of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2KClO₃ —> 2KCl + 3O₂
Next, we shall determine the mass of KClO₃ that decomposed and the mass of O₂ produced from the balanced equation. This can be obtained as follow:
Molar mass of KClO₃ = 39 + 35.5 + (16×3)
= 39 + 35.5 + 48
= 122.5 g/mol
Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g
Molar mass of O₂ = 2 ×16 = 32 g/mol
Mass of O₂ from the balanced equation = 3 × 32 = 96 g
SUMMARY:
From the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂.
Finally, we shall determine the mass of O₂ produced by heating 36.89 g of KClO₃. This can be obtained as follow:
From the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂.
Therefore, 36.89 g of KClO₃ will decompose to produce =
(36.89 × 96)/245 = 14.45 g of O₂
Thus, 14.45 g of O₂ were obtained from the reaction.
Draw a mechanism for this reaction. In the reaction scheme, an acyl chloride reacts with an acid to give an acid anhydride. The acyl chloride contains a central C atom that has a double bond to O, a single bond to Cl, and a single bond to a benzene ring. The acid is CH3COH with an O atom double-bonded to the second (from left to right) carbon. The produced anhydride is COCCH3 with a benzene ring attached to the first (from left to right) carbon and an O atom double-bonded to the firth and the second carbons.
Answer:
See explanation and image attached
Explanation:
The reaction shown here is the reaction between an acyl chloride and a carboxylic acid. This reaction produces an acid anhydride.
The first step in the reaction is the nucleophillic attack of the acid on the acyl carbon of the acyl chloride. This is followed by loss of HCl to yield the acid anhydride as shown in the image attached.
The product formed is PhCOOCOCH3.
PLZ HELP NEED HELP ASAP
Answer:
The third answer choice.
A gas occupies 5.0 cubic meters at a temperature of 600. K. If the temperature is lowered to 300. K at constant pressure, the new volume occupied by the gas will be:
Answer:
[tex]V_2=2.5m^3[/tex]
Explanation:
Hello!
In this case, according to the Charles' law as a directly proportional relationship between volume and temperature:
[tex]\frac{V_2}{T_2}=\frac{V_1}{T_1}[/tex]
Thus, in order to compute the final volume, V2, we obtain the following expression:
[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{5m^3*300K}{600K}\\\\V_2=2.5m^3[/tex]
Best regards!
Which Sphere does condensation occur.
Answer:
The atmosphere, I believe.
Explanation:
Why is co2 so bad for our bodies and why do we need to remove it? In the context of protons and ions acid/base solution.
Which statement best explains how weather is related to the water
cycle?
Answer:
Increased evaporationof water vapour from sea or land will increase rainfall
Answer:
Explanation:
increased evaporation of water vapor from sea to land will increase rainfall
NO GO*GLE ANSWERS PLEASE!
Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal, X-ray light is transmitted through the material, and visible light is reflected off the metal. Tyrel wonders if the metal will get warm if he shines the lights on it.
Answer:
Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal. X-ray light is transmitted through the metal. ... Yes, light can cause the metal to get warm because light carries energy.
Hydrofluoric acid and water react to form fluoride anion and hydronium cation, like this:
HF(aq) + H2O(I) rightarrow F-(aq) + H3O+(aq)
At a certain temperature, a chemist finds that a 5.6 L reaction vessel containing an aqueous solution of hydrofluoric acid, water, fluoride anion, and hydronium cation at equilibrium has the following composition:
Compound Amount
HF 1.62 g
H2O 516 g
F- 0.163 g
H3O+ 0.110 g
Calculate the value of the equilibrium constant for this reaction.
Answer: The value of the equilibrium constant is 0.000023.
Explanation:
Equilibrium concentration of [tex]HF[/tex] = [tex]\frac{1.62g}{20.01g/mol\times 5.6L}=0.014M[/tex]
Equilibrium concentration of [tex]H_2O[/tex] = [tex]\frac{516g}{18g/mol\times 5.6L}=5.12M[/tex]
Equilibrium concentration of [tex]F^-[/tex] = [tex]\frac{0.163g}{18.9g/mol\times 5.6L}=0.0015M[/tex]
Equilibrium concentration of [tex]H_3O^+[/tex] = [tex]\frac{0.110g}{18g/mol\times 5.6L}=0.0011M[/tex]
The given balanced equilibrium reaction is,
[tex]HF(aq)+H_2O(l)\rightleftharpoons F^-(aq)+H_3O^+(aq)[/tex]
The expression for equilibrium constant for this reaction will be,
[tex]K_c=\frac{[F^-]\times [H_3O^+]}{[HF]\times [H_2O]}[/tex]
[tex]K_c=\frac{(0.0015\times 0.0011}{(0.014\times 5.12)}[/tex]
[tex]K_c=0.000023[/tex]
Thus the value of the equilibrium constant is 0.000023.
In order to predict the outcome of the reaction, write the molecular, full ionic, and net ionic equations for a mixture of aqueous ammonia (NH3) and silver nitrate (AgNO3) in which a diammonia silver complex ion is produced. Molecular: Full ionic: Net ionic: Predict your observations based on above molecular equation: Actual observations:
Answer:
See explanation
Explanation:
Full molecular equation;
2NH3(aq) + AgNO3(aq) -------> [Ag(NH3)2]NO3(aq)
Full ionic equation
2NH3(aq) + Ag^+(aq) + NO3^-(aq) --------> [Ag(NH3)2]^+(aq) + NO3^-(aq)
Net ionic equation;
2NH3(aq) + Ag^+(aq) --------> [Ag(NH3)2]^+(aq)
When Silver nitrate is mixed with a solution of aqueous ammonia, a white and cloudy solution was observed.
Write a balanced net ionic equation for each of the following aqueous metathesis reactions. Classify each reaction as a neutralization, precipitation, or gas--forming reaction.
A. Hydrobromic acid and cesium hydroxide.
B. Sulfuric acid and sodium carbonate.
C. Cadmium chloride and sodium sulfide.
Answer:
See explanation
Explanation:
A. This is a neutralization reaction.
Molecular equation;
HBr(aq) + CsOH(aq) ---------> CsBr(aq) + H20(l)
Complete ionic equation;
H^+(aq) + Br^-(aq) + Cs^(aq) + OH^-(aq) --------> Cs^+(aq) + Br^- + H20(l)
Net ionic equation;
H^+(aq) + OH^-(aq) --------> H20(l)
B. This is a gas forming reaction;
H2SO4(aq) + Na2CO3(aq) ------->Na2SO4(aq) + H2O(l) + CO2(g)
Complete ionic equation;
2H^+(aq) + SO4^-(aq) + 2Na^+(aq) + CO3^2-(aq) ------->2Na^+(aq) + SO4^-(aq) + H2O(l) + CO2(g)
Net ionic equation;
2H^+(aq) + CO3^2-(aq) -------> + H2O(l) + CO2(g)
C. This a precipitation reaction
Molecular equation;
CdCl2(aq) + Na2S(aq) ------->CdS(s) + 2NaCl(aq)
Complete ionic equation;
Cd^2+(aq) + 2Cl^-(aq) + 2Na^+(aq) + S^2-(aq) ---------> CdS(s) + 2Na^+(aq) + 2Cl^-(aq)
Net ionic equation;
Cd^2+(aq) + S^2-(aq) ---------> CdS(s)
what explains the bonding in a compound made from carbon and hydrogen
1) ch4 because every hydrogen gets two electrons to bond
2) ch4 because 8 electrons are shared in this molecule
Answer:
2) ch4 because 8 electrons are shared in this molecule
Explanation:
The bond between carbon and hydrogen in the molecule; CH4 is a covalent bond. This bond involves sharing of electrons. Carbon has a valency of 4 and needs four more electrons to complete it's electronic configuration. These 4 electrons are taken care of by the 4 hydrogen atoms which each have a valency of 1.
calculate the percentage of sodium and carbon and oxygen in sodium carbonate
Help please it’s due in 3 minutes
Answer:
A
Explanation:
Both students are Pushing/Pulling towards the same direction meaning if enough force is applied the object will move into that direction
A solution contains 6 mg isopropanol dissolved in 2 kg H2O. The isopropanol concentration is?
Answer:
the concentration of isopropanol is 3 ppm.
Explanation:
The isopropanol concentration is
As we know that
Concentration = mass isopropanol ÷mass of water
= 6 mg ÷ 2 kg
= 3 mg/Kg
Now convert 3 mg/Kg to ppm.
As we know that
1 mg/Kg = 1 ppm
So,
3 mg/Kg = 3 ppm
Hence, the concentration of isopropanol is 3 ppm.
TEST QUESTION FOR CHEMISTRY GENIUSES ONLY...
Answer:
HBr has an electronegativity difference of .76 because Hydrogen's electronegativity is 2.2 and the electronegativity of Bromide is 2.96, and by the chart, it has a polar-covalent bond
Hope this helps!
True of false
nad + and fad are also used to shuttle energy from the favourable oxidations that take place in anabolism, to the unfavourable reactions that take place in catabolism.
Answer:
true
Explanation:
Particle size directly affects which of the following spil properties?
Answer:
The size of soil particles is important. The amount of open space between the particles influences how easily water moves through a soil and how much water the soil will hold. Too much clay, in proportion to silt and sand, causes a soil to take in water very slowly. Such a soil gives up its water to plants slowly.
calculate the wavelength of the first line in the lymen series of hydrogen spectrum
elements have similar characteristics?
Periodic TaBle
oF The Elements
Answer:
See attachment.
Explanation:
Elements that are in the same group will definitely possess similar characteristics because they tend to have the same valence electron which determines their reactivity.
On a periodic table, elements in the same group can be found arranged on the same column in the periodic table.
Therefore the two elements that have similar characteristics are those two elements you can see on the same column in group 2. See the two elements indicated in the attachment below.
.
In an investigation, the volume of a material is measured
as 80.0 cm3 and its mass is measured as 253 g. Which
calculation of density correctly uses the precision rules:
3.1625 g/cm3, 3.163 g/cm3, 3.16 g/cm3, 3.2 g/cm3, or 3
g/cm3?
Answer:
3.2 g/cm3
Explanation:
Mass = 253 g
Volume = 80.0 cm3
Density = Mass / Volume = 253 g / 80.0 cm3
Density = 3.1625 g/cm3
The precision rule means the answer must not have more significant values than the value with the least number of significant figures. In this case, the value with the least number of significant figures is 80.0 with two signiificant figures. Hence;
Answer = 3.2 g/cm3
A chemical plant produces ammonia using the following reaction at high
temperature and high pressure. Which issue are plant engineers and
investors most likely to see as a drawback of this method?
3H2 + N2 = 2NH3 + energy
A. This reaction system will solidify at a higher temperature and
obstruct the equipment.
B. The high temperature will increase the rate of the reactant-favored
reaction at equilibrium.
C. The high pressure will increase the rate of the reactant-favored
reaction at equilibrium.
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Answer:
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Explanation:
The chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
What is the chemical plant?An industrial processing facility known as a "chemical plant" produces chemicals, typically on a large scale.
What are fossil fuels?The components of fossil fuels are decaying plants or animals. These fuels may be consumed to provide energy and could be discovered in the crust of the Earth. Fossil fuels include, for example, coal, oil, as well as natural gas.
Therefore, the chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
Hence, the correct answer will be option (D)
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How many moles are in 3.2 x 10^25 atoms of silver?
53 mol Ag
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 3.2 × 10²⁵ atoms Ag
[Solve] moles Ag
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 3.2 \cdot 10^{25} \ atoms \ Ag(\frac{1 \ mol \ Ag}{6.022 \cdot 10^{23} \ atoms \ Ag})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 53.1385 \ mol \ Ag[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
53.1385 mol Ag ≈ 53 mol Ag
How does a jacket keep you warm?
Answer:
Your body releases heat. Your jacket helps your body preserve that heat by shielding the heat from going out in the cold.
ASAP!!
Identify the limiting reactant when 6 moles of CaCl2 is combined with 6 moles of Al2O3.
Reaction: 3CaCI2 + Al2O3 -> 3CaO + 2AlCI3
Answer:
just downloud smart
Explanation:
thank me later
Which of the following is a strong acid?
O HF
ОКОН
O HCIO4
O HCIO
O HBrO
Why didn't you just clean the spill with water?
Answer:
if you did it would probably make it bigger...
Explanation:
:)
Question
In Woodward's 1952 synthesis of cholesterol, an elimination reaction was used to remove the C20 alcohol
substituent as shown below. The transformation is performed with acetic acid (hint: as opposed to a strong
base). Would you classify this as an E1 or E2 elimination?
Ola.E2
O b, E1
Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter at 22.4 o C causes the temperature to rise to 25.8 o C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g o C? Is the reaction exothermic or endothermic?
Answer:
Explanation:
Heat involved Q = mcΔt where m is mass , c is specific heat of water and Δt is rise in temperature
= 150 x 4.18 x 25.8 J .
= 16176.6 J .
As the temperature rises , the reaction is exothermic.
