structure of 2,6-diiodo-4-methyl-5-propylheptane
Answer:
diiodo????
Explanation:
recheck the question and resend
plzzzzzzz help asap its just one question plzzzzz its in the file <3
Answer:
There are 6 atoms of oxygen in 2Ca(NO3)2
What is the mass of 2.2 moles of magnesium chloride? With work shown
on analysis an ammonium salt of an alkanoic acid gave 60.5% C and 6.5% H if 0.309g of the salt yield 0.0313g of Nitrogen determine the empirical formula of the salt [ H = 1, C =12, N = 14, O= 16]
Answer: C7H9NO2
Explanation:
%N = 0.0313/0.309 x 100
= 10.1%
%0 = 100 — (60.5 + 6.5 + 10.1)
= 22.9
C; 60.5/12 H; 6.5/1 N; 10.1/14 O; 22.9/16
C; 5.04/0.72 H; 6.5/0.72 N; 0.72/0.72 O; 1.43/0.72
Empirical formula — C7H9NO2
what does the picture depict about ecology?
What is the activation energy of a reaction?
A. The energy that is given off when a reaction happens
B. The kinetic energy of the colliding molecules
C. The speed at which the molecules must be moving in order to
react
D. The energy the molecules must have in order to react
SUBMIT
Answer:
D i took it aswell
Explanation:
The energy the molecules must have in order to react. Hence, option D is correct.
What is activation energy?Activation energy is the sufficient amount of energy necessary to initiate a chemical reaction.
It can also be said as the minimum amount of energy needed to energize molecules or atoms so that they can undergo a chemical reaction or transformation.
Hence, the energy the molecules must have in order to react.
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The image shown here is a good illustration of which law?
Answer:
The answer is A.Newton's First law
For the following reaction, 14.3 grams of phosphorus (P4) are allowed to react with 32.1 grams of chlorine gas. phosphorus (P4) (s) + chlorine (g) phosphorus trichloride (l) What is the maximum amount of phosphorus trichloride that can be formed? grams What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete? grams
Answer:
Limiting reactant: Cl2.
Max mass of PCl3 = 41.44 g.
P4 leftover = 5.51 g.
Explanation:
Hello!
In this case, since the undergoing chemical reaction is:
[tex]P_4+6Cl_2\rightarrow 4PCl_3[/tex]
In order to compute the maximum amount of PCl3, it is necessary to compute the grams of this product produced by each reactant, just as shown below, whereas molar masses and mole ratios are used:
[tex]m_{PCl_3}^{by\ P_4}=14.3gP_4*\frac{1molP_4}{123.89gP_4} *\frac{4molPCl_3}{1molP_4} *\frac{137.33gPCl_3}{1molPCl_3} =63.41gPCl_3\\\\m_{PCl_3}^{by\ Cl_2}=32.1gCl_2*\frac{1molCl_2}{70.91gCl_2} *\frac{4molPCl_3}{6molCl_2} *\frac{137.33gPCl_3}{1molPCl_3} =41.44gPCl_3[/tex]
Thus, since chlorine gas yields fewer grams of PCl3 than P4 we infer Cl2 is the limiting reactant and 63.41 grams of PCl3 product are yielded.
Finally, for the excess reactant, we see a difference of 63.41-41.44=21.97g, so we can compute of the leftover of P4 as follows:
[tex]m_{P_4}^{leftover}=21.97gPCl_3*\frac{1molPCl_3}{137gPCl_3} *\frac{1molP_4}{4molPCl_3} *\frac{137.33gP_4}{1molP_4} =5.5gP_4[/tex]
Best regards!
HELP ASAP PLS. The melting of a glacier is an example of the interactions among which of Earth’s spheres?
A. geosphere, troposphere, cryosphere
B. atmosphere, geosphere, cryosphere
C. atmosphere, asthenosphere, biosphere
D. hydrosphere, asthenosphere, atmosphere
Answer:
d. hydrospher, asthenosphere, atmosphere
Answer:
its actually b atmosphere, geosphere, cryosphere atmosphere
Explanation: atmosphere is most likely the heat in the air or the water evaporating , cryosphere is the ice that forms the glaciers. and thats how i know im not sure about geosphere but i know its none of the others ones hope this helps :D
What is the correct name for Cr2O3?
A. Chromium trioxide
B. Chromium(III) oxide
C. Dichromium trioxide
D. Chromium(II) trioxide
Beryllium oxide, Beo, is an electrical insulator. How
many moles of beryllium oxide qre in a 250 gram
sample of the compound?
Answer:
There are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.
Explanation:
We can calculate the number of moles (η) of BeO as follows:
[tex] \eta = \frac{m}{M} [/tex]
Where:
m: is the mass = 250 g
M: is the molar mass = 25.0116 g/mol
Hence, the number of moles is:
[tex] \eta = \frac{250 g}{25.0116 g/mol} = 10.0 moles [/tex]
Therefore, there are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.
I hope it helps you!
MEDICAL FORENSICS
please help me i only get one chance to do this please
Answer:
i think the answer is b temperature
Answer:
no
Explanation:
Who made the first periodic table
What type of element has 8 electrons in their outer most level?
non-metals
metals
noble gases
alkali metals
Answer:
Noble gases
Explanation:
Neon and argon have 8 electrons in their outermost shells. The elements which have 8 electrons in the outermost shell or in the valence shell,are known as the noble gases.
It's the third one or Noble gases.
Answer please I need help
Answer:
Explanation::::
i have to match the word lithosphere to life, sky/air, land and water which one?
Answer:
The answer is air
Explanation:
This is from the web:
"The lithosphere is located below the atmosphere, which is the air that surrounds the planet, and above the asthenosphere."
Hope this helps and answers your question! Have a great day/night!
A balloon is filled with 30L of helium gas at 1atm.What is the volume when balloon rises to an attitude where the pressure is only 0.25 atm?
Answer:
[tex]V_2=120L[/tex]
Explanation:
Hello!
In this case, since Helium is undergoing a volume-pressure change, according the Boyle's law, we infer the following equation is used:
[tex]P_1V_1=P_2V_2[/tex]
Thus, since we are not given the volume at 0.25 atm, we can solve for V2 to do so:
[tex]V_2=\frac{P_1V_1}{P_2}[/tex]
Thus, we plug in to obtain:
[tex]V_2=\frac{1atm*30L}{0.25atm}=120L[/tex]
Best regards!
The final volume of the balloon at the given altitude is 120 L.
The given parameters;
initial volume of the balloon, V₁ = 30 Linitial pressure, P₁ = 1 atmfinal pressure of the balloon, P₂ = 0.25 atmThe final volume of the balloon at the given altitude is calculated by applying Boyles law as follows;
[tex]P_1 V_1 = P_2 V_2\\\\V_2 = \frac{P_1V_1}{P_2} \\\\V_2 = \frac{30 \times 1 }{0.25} \\\\V_2 = 120 \ L[/tex]
Thus, the final volume of the balloon at the given altitude is 120 L.
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What are the main parts of a simple electrie motor, like the one found inside a remote control car? O a generator, wires, and turbine magnets and coils of wire O electromagnets only
Answer:
A DC power supply, commutator, rotor armature, axle, and a field magnet.
a molecure that contains 3 iddentical polar bonds to the central atom will be
ANSWER:
Nonpolar
sorry if I'm wrong
what is the overall equilibrium constant of 4NH3+7O2=4NO2+6H2O
Answer:
An apple, potato, and onion all taste the same if you eat them with your nose plugged
Explanation:
What are some positive and negative things about living near a volcano?
Which of the following statements best goes with the Law of Conservation of Energy?
all energy conversions are 100% efficient
O all energy from the sun is transferred to organisms directly by the 10% rule
O all of the sun's energy is either transformed into kinetic energy, and eventually heat energy
O all matter cannot be created or destroyed
Answer:
all letter cannot be created or destroyed just transformed
Many inland areas around Florida contain extinct marine fossils. Which of the following statements best describes how this might have occurred?
Answer:
D
Explanation:
strong winds carried marine organisms inland where they were buried and fossilized under layer of sediment
Answer:
Strong winds carried marine organisms inland where they were buried and fossilized under layers of sediment.
Explanation:
Which is the formula for nitrogen trihydride? NH3 N3H 3NH N3H3
NH3
N3H
3NH
N3H3
Answer:
NH3
Explanation:
The "tri" attached to the trihydride means 3. So your hydrogen is going to have 3 atoms.
Answer:
All Answers only for the elite; Nomenclature of Covalent Compounds Quiz
You're Welcome :)
Explanation:
A-hydrochloric acid
B-sulfuric acid
C-dinitrogen pentoxide
C- IBr3
A- carbon dioxide
B- Start the name with hydro-.
B- H3BO3
C-sulfur trioxide
A- NH3
B- The chemical name ends with “hydroxide.”
Why does there appear to be another duck head in the water?
A
The water in the pond reflects light from the Sun, making a mirror image
B
The molecules in the atmosphere refract the light, splitting it into two ima
С
The duck scatters the light, making hundreds of tiny refractions that collec
D
The bottom of the pond absorbs the light, then projects it toward the surfa
Answer:
it's A. The water in the pond reflects light from the Sun, making a mirror image
Explanation:
i just took the test
The hydrolysis of adenosine triphosphate (ATP) is represented by the equation below. This reaction is critically important in cellular biology, but the reaction itself proceeds at a very slow rate. Based on the information given, which of the following best explains why an enzyme (biological catalyst) is required for the reaction to occur at a faster rate?
ATP+ H2O ADP+ Pi
ΔG= -30.5Kj/mol
a. Because ΔG < 0, the hydrolysis of ATP is not thermodynamically favorable. In cells, ΔS is increased by increasing the amount of H2O consumed, resulting in ΔG >0 and an increase in the reaction rate.
b. Because ΔG < 0, the hydrolysis of ATP is not thermodynamically favorable. In cells, enzymes act as catalysts that decrease ΔH for the reaction, resulting in ΔG >0 and an increase in the reaction rate.
c. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a small activation energy.
d. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a large activation energy.
Answer:
d. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a large activation energy.
Explanation:
Hello!
In this case, since negative Gibbs free energies of reaction stand for thermodynamically favored processes, we can immediately rule out choices a. and b.
Moreover, since the reaction is slow without the presence of a catalyst, which the context of biochemistry is an enzyme, we infer that correct choice is d. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a large activation energy because the higher the activation energy the slower the reaction according to the Arrhenius equation.
Best regards!
Diffusion of Sucrose in Gelatin. A layer of gelatin in water 5 mm thick and con-taining 5.1 wt % gelatin at 293 K separates two solutions of sucrose. The concentra-tion of sucrose in the solution at one surface of the gelatin is constant at 2.0 g sucrose/100 mL solution, and 0.2 g/100 mL at the other surface. Calculate the flux of sucrose in kg sucrose/s
Answer:
the flux of sucrose is 9.072 × 10⁻⁷ kg sucrose / m² sec
Explanation:
Given the data in the question;
water-gelatin solution separating two different concentration solutions of sucrose; 5.1 wt % gelatin at 293 K; at this conditions diffusivity of sucrose in water gelatin solution is;
[tex]D_{AB}[/tex] = 0.252 × 10⁻⁹ m²/sec.
we know that; 1 L = 0.001 m³, 1mL = 0.001 L
[tex]C_{A1}[/tex] = 2.0 g sucrose/100 mL = 2.0 × 10⁻³ kg sucrose / 100 × 10 ⁻³ L
[tex]C_{A1}[/tex] = 2.0kg sucrose / 100 L
[tex]C_{A1}[/tex] = 2.0 kg sucrose / 100 × 10⁻³ m³
[tex]C_{A1}[/tex] = 20 kg sucrose / m³
[tex]C_{A2}[/tex] = 0.2 g sucrose/100 mL = 0.2 × 10⁻³ kg sucrose / 100 × 10⁻³ × 10⁻³ L
[tex]C_{A2}[/tex] = 2 kg sucrose / m³
Thickness ß = 5 mm = 5 × 10⁻³ m
Now, flux of sucrose in kg sucrose / m³sec will be;
using the formula, [tex]N_{A}[/tex] = [tex]D_{AB}[/tex] /ß ( [tex]C_{A1}[/tex] - [tex]C_{A2}[/tex] )
we substitute
[tex]N_{A}[/tex] = (0.252 × 10⁻⁹ m²/sec / 5 × 10⁻³ m) ( 20 kg sucrose / m³ - 2 kg sucrose / m³ )
[tex]N_{A}[/tex] = (0.252 × 10⁻⁶ / 5) × 18 kg sucrose / m² sec
[tex]N_{A}[/tex] = 4.536 × 10⁻⁶ / 5 kg sucrose / m² sec
[tex]N_{A}[/tex] = 9.072 × 10⁻⁷ kg sucrose / m² sec
Therefore, the flux of sucrose is 9.072 × 10⁻⁷ kg sucrose / m² sec
Write the formulas for the reactants and products. Balance the chemical equation.
Combination/Synthesis Reaction:
Sodium + Oxygen —>
Explanation:
2Na+O2=2N2Ois balanced one
QUESTION 7 Can you use alligation for any type of liquid?
Answer:
Yes you can use alligation for a type of liquid. Explanation: Alligation is an old and practical method of solving arithmetic problems related to mixtures of ingredients.
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Thus, we can use allegation for any type of liquid.
What is matter?
Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Allegation is a form of liquid that we may utilize. Allegation is a time-tested and useful strategy for tackling mathematical issues involving combinations of elements.
Thus, we can use allegation for any type of liquid.
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Identify the acid,
Base and salt of following.
b) lime water
d) potassium oxide
coppor sulphate
( vinegar
Answer:
Lime water Ca(OH)2 is a base
Potassium oxide K2O is a basic oxide
Copper sulphate CuSO4 is a salt
And vinegar is an acid
Explanation: