Which of the following could be the rate equation for a first order reaction? please help this is timed
Rate = k[A] = first order reaction
Further explanationGiven
Rate law
Required
A first-order reaction
Solution
The rate law : equation for the rate of chemical reaction
For reaction
aA + bB ⇒ C
The rate : r = k[A]ᵃ[B]ᵇ
The sum of exponents(a+b) is the reaction order
From the choice :
a. a+b = 2, second order reaction
b. a+b = 3, third order reaction
c. a+b = 4, fourth order reaction
d a+0 = 1, first order reaction
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Maple has a sample of graphite, which is made up of carbon atoms. She has 1.810 x 1024 atoms of carbon. What is the mass of this sample?
Answer:
about 36.10 g
Explanation:
The proportion of interest is ...
mass/atoms = x/(1.810·10^24) = (12.0107 g)/(6.02214076·10^23)
Multiplying by 1.810·10^24, we find the mass of the sample to be ...
x = 36.0991 g
The mass of the sample is about 36.10 grams (to 4 s.f.).
Answer:
about 36.10 gthe mass of the given maple which she has 1.810×1025 atoms of carbon is equal of about 36.10 G/grams.PLS HELP!!
Balance this equation: __H2+ 2 O2---> 2 H2O
Answer:
2H₂ + O₂ → 2H₂O
Explanation:
The expression of the equation is given as:
_H₂ + 2O₂ → 2H₂O
Now for expression above,
Reactants Products
H 2 4
O 4 2
to balance the equation, we use 2 moles of hydrogen gas and 1 mole of oxygen gas;
2H₂ + O₂ → 2H₂O
A 32-year-old man presents describing an intense fear of germs. He continually
experiences thoughts about contracting an illness by coming into contact with things in
the environment, such as doorknobs or seats in public places. His intense fear of germs
has resulted in repetitive hand washing. He describes brief relief after hand washing but,
because his thoughts about contamination keep returning, he states that he "cannot help
but wash again for hours a day" Both of his hands are red, raw, and cracked and he had to
leave his job because of his fear of sitting down in public places,
Why do hotspots appear to move in relation to tectonic plates?
Answer:
The heat that fuels the hot spot comes from very deep in the planet. This heat causes the mantle in that region to melt. The molten magma rises up and breaks through the crust to form a volcano. While the hot spot stays in one place, rooted to its deep source of heat, the tectonic plate is slowly moving above it.
Explanation:
Which material is the medium of ocean waves?
A. Sand
B. Air
C. Rock
D. Water
Answer:
Its D. Water
Explanation:
hope this helps :)
PLSS HELPPP ILL GIVE 30 POINTS PLSS its for a test plss
SHORT ANSWER QUESTION: Include a Claim, Evidence, Explanation, and Conclusion for full credit.
Cells were obtained from a patient with a viral infection. The DNA extracted from these cells consisted of two forms: double-stranded human DNA and single-stranded viral DNA. The base composition of these two forms of DNA are shown in the image.
Construct an argument based on evidence to determine which form was the viral DNA and which form was the human DNA.
(5 Points)
Answer:
I am sorry but this is cheating you have to come up with your own answer
Explanation:
Help with this instruction booklet
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Is anybody see my princess i mean sara
Answer:
hi I dont see princess or sara but have a good day!
Answer:
Hola chica
¿Qué paso?
Dimelo
How many liters of air must react with 2500 mL of hexane in order for combustion to occur completely. The percentage of oxygen in air is 20.9%.
Answer:
118750 ml
Explanation:
The chemical equation for complete combustion of hexane is given as;
2C6H14 + 19O2 → 12CO2 + 14H2O
From the equation of the reaction;
2 mol of C6H14 reacts with 19 mol of O2
2 ml of C6H14 reacts with 19 ml of O2
2500 mL of C6H14 would react with x ml of O2
2 = 19
2500 = x
x = 2500 * 19 / 2 = 23750 ml
Since oxygen is 20% of air;
23750 = 20 / 100 * (Volume of air)
Volume of air = 23750 * 100 / 20 = 118750 ml
3) Convection can only happen in what? *
Answer:
Convection can only happen with liquids and gases.
Hope it helps :)
Help science loook at pictureeee
Answer: Convection current
Explanation:
Answer:
convection currents
Explanation:
A mountain ridge is a geological chain of mountains and/or hills
The diagram shows a convection current
Explain intermolecular forces cause water molecules to stick to a material like a glass pitcher
Answer:
Cohesive forces cause the water molecules to stick together with a lot of elasticity, allowing the water to function very much like a rubber into a material like a glass pitcher.
Intermolecular forces such as dipole-dipole forces, London dispersion forces exist between molecules and these depend on strength of electronegativity of molecule. Therefore, cohesive forces cause water molecules to stick to a material like a glass pitcher.
What is intermolecular forces of attraction?Intermolecular forces of attraction is force of attraction that make two molecule come closer. Intermolecular forces of attraction is directly proportional to the electronegativity of the molecule.
Cohesive forces cause the water molecules to stick together with a lot of elasticity, allowing the water to function very much like a rubber into a material like a glass pitcher.
Therefore, cohesive forces cause water molecules to stick to a material like a glass pitcher.
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A sample of water contains 5.24 x 1022 molecules. How many moles are in this sample?
Answer:
0.087 moles of water
Explanation:
Given data:
Number of molecules of water = 5.24×10²² molecules
Number of moles of water = ?
Solution:
Avogadro number:
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules of water
5.24×10²² molecules × 1 mol / 6.022 × 10²³ molecules
0.87×10⁻¹ mol
0.087 mol
I have it attached plz help ASAP
Answer:
The answer would most likely be C
Subscripts and coefficients are used in chemical equations to show the number of atoms and molecules in a reaction.
True or false
PLEASE HELP YOU HAVE TO CLICK THE CORRECT ONES PLEASE IM BEGGING YALL IF I FAIL THIS I FAIL MY GRADE....... Directions: Select each correct image. More than one image may be correct.
The diagrams below show interactions between charged particles. The blue particles are negatively charged, and the red particles
are positively charged.
Which of the diagrams shows a correct interaction between the fields of two charged particles?
Answer:
D
Explanation:
Since the negative particles are going towards the negative section and the positive particles are leaving the positive section. Additionally, opposite charges attract each other and like charges repel each other.
There will be attraction between the opposite charges and repulsion among the like charges. Here the diagram D shows a correct interaction between the fields of two charged particles.
What is a electric field?The electric force acting per unit charge is defined as the electric field. They are generally produced by changing the electric charges or magnetic fields. The electric field strength is expressed in volt per meter (V/m).
E = F/Q
In an electric field it is the electric charge which provides the direction of field. If the charge is negative, then the field is directed towards the charge. A field is directed away from the charge if the charge is negative.
All the electric fields start form a positive charge and end on a negative charge. If two positive charges interact then there will be repulsion between them. But if a positive charge interact with a negative charge then there will be attraction among them.
In diagram D there is an attraction between the opposite charges.
Thus the correct option is D.
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Which need, want value, or interest was most likely involved in the
development of the device shown?
A. A lack of parking spaces for cars
B. A way to read license plates from afar
C. A safe and fair driving environment
D. A well-funded police department
PREVIOUS
Answer: C
Explanation:
How does the strength
of the force effect the
velocity of the object?
Answer:
nertial mass is a measure of how difficult it is to change the velocity of an object. Example. Calculate the force needed to accelerate a 22 kg cheetah at 15 m/s².
Explanation:
True or False. If a fire destroyed all of the grass in a grassland, this would NOT affect the biodiversity of this ecosystem.
Answer:
This is false
Answer:
100% false
Explanation:
common sense
What is the pauli exclusion principle and how does it apply to electron configuration?
Answer:
pauli exclusion principle states that no two electrons in the same orbital can have the same spin.
Explanation:
this means you can't have 2 up arrows or 2 down arrows in your box
science help me please :))
Answer:
There will be 2 nitrogen and 2 oxygen atoms in the product.
Explanation:
In a chemical reaction, atoms are neither created or destroyed, which means if there are 2 nitrogen atoms in the reactants, there will be 2 nitrogen atoms in the products. Similarly, if there are 2 oxygen atoms in the reactants, there will be 2 oxygen atoms in the products.
Let me know if this helps!
how many moles of H2O will be required to make 17.6 moles of O2
Answer:
1 mole
Explanation:
A mole of water molecules contains 2 moles of hydrogen atoms and 1 mole of oxygen atoms.
What does this quote mean to you?
"You may need to fight a battle more then once to win."
Explanation:
I think it means that even if you dont succeed at something the first time you do it doesn't mean you sould give up.
Which orbital notation represents the second principal energy level of a silicon atom in the ground state?
Answer:
2
Explanation:
Silicon is one the elements found in nature and well positioned the periodic table.
It has an atomic number of 14 with an electronic configuration:
1s² 2s² 2p⁶ 3s² 3p⁴
From this formula the orbital notation that represents the second principal energy level is 2.
The main energy level in which the orbital is located or the average distance of the orbital from the nucleus is the principal quantum number.
It takes the number 1,2,3,4,5 e.t.c
Based on which principle the atomic orbital are filled with electrons?
Answer:
aufbau principle
Explanation:
The Aufbau principle states that electrons fill lower-energy atomic orbitals before filling higher-energy ones (Aufbau is German for "building-up"). By following this rule, we can predict the electron configurations for atoms or ions.
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how many valance electrons do all of the elements under carbon have?
what is the most reactive alkali metal?
Answer:
Na, soudium
Explanation:
also Fr Francium.
Rolf prepares four solutions using different solutes as shown in the table below.
Which solution is unsaturated?
Solution A
Solution B
Solution C
Solution D
Answer:
Solution A
Explanation:
Correct on Edge Cumulative Review Exam 2021
Have a blessed day
The unsaturated solution is the one where, the amount solute is lower than the solubility at a specific temperature. Hence, the solution A will form an unsaturated solution.
What is unsaturated solution?Unsaturated solutions are those having the lower concentration of solute than the saturation point of the solvent. Whereas, a saturated solution will completely dissolve the solute in its maximum amount and beyond a point the solute cannot be dissolved.
At a specific temperature gradient, if the dissolved solute is equal to the solvent's saturation point it will form a saturated solution. From the given table it is clear that except solution A all solutions have higher amount of solute than the saturation point.
As the solute concentration is higher, the solvent will try to dissolve maximum amount of the solute. Hence, in solution A have only 20 g of solute added but its saturation point is 37 g/100g. THus, the solution forms an unsaturated solution.
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