Answer:
[tex]250 \times \frac{1}{63.5} \times \frac{2}{1} = 7.874mol \: ag[/tex]
Calculate the molarity of a MgSosolution
prepared by adding 0.37 moles of MgSO, to
enough water to make 11 of solution.
Answer in units of V.
Answer:
is
Explanation:
because
A compound has the empirical formula CH20 and a
gram-formula mass of 60. grams per mole. What is the
molecular formula of this compound?
Answer:
The molecular formula of this compound is (2) C2H4O2.
Explanation:
Which material would conduct heat best?
А.Air
B.Copper
C.Wood
D.Rubber
Answer:
I believe the best answer is B. Copper.
Explain why water and syrup are able to mix?
2nd attempt
*
Feedback
See Periodic Table O See Hint
Calculate AEfor a system that absorbs 599,0 kJ of heat from its surroundings
and does 3510 kJ of work on its surroundings.
Answer:
-2911 kJ
Explanation:
Step 1: Given data
Heat absorbed by the system (Q): 599.0 kJ (By convention, when the systems absorbs heat, Q > 0)Work done by the system on the surroundings (W): -3510 kJ (By convention, when the systems does work on the surroundings, W < 0)Step 2: Calculate the change in the internal energy (ΔE)
We will use the following expression.
ΔE = Q + W
ΔE = 599.0 kJ + (-3510 kJ) = -2911 kJ
What heats up faster but loses heat faster?
-Water
-Air
Or
Land
Covalent bonds are formed between the
two nonmetals
and
The nonmetals will
electrons.
Answer:
Explanation:
A covalent bond is formed between two non-metals that have similar electronegativities. Neither atom is "strong" enough to attract electrons from the other
A student pours 800.0 mL of a 3.000 molar solution of sodium hydroxide into a 2.00 liter volumetric flask and fills the flask up with water. What is the new molarity of the solution?
A) 12.00 M
B) 1.20 M
C) 14.00 M
D) 0.0750 M
Combustion of hydrocarbons such as octane (C_8H_18) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth's atmosphere can trap the Sun's heat, raising the average temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.
1. Write a balanced chemical equation, including physical state symbols, for the combustion of liquid octane into gaseous carbon dioxide and gaseous water.
2. Suppose 0.330 kg of octane are burned in air at a pressure of exactly 1 atm and a temperature of 10.0 ?C. Calculate the volume of carbon dioxide gas that is produced. Round your answer to 3 significant digits.
Answer: 1. [tex]2C_8H_{18}(l)+25O_2(g)\rightarrow 16CO_2(g)+18H_2O(g)[/tex]
2. The volume of carbon dioxide gas that is produced is 537 L
Explanation:
1. Combustion is defined as the type of chemical reaction where a hydrocarbon is combusted in the presence of oxygen to give carbon dioxide and water.
The balanced reaction for combustion of octane is:
[tex]2C_8H_{18}(l)+25O_2(g)\rightarrow 16CO_2(g)+18H_2O(g)[/tex]
2.
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex] [tex]\text{Moles of octane}=\frac{0.330\times 1000g}{114.23g/mol}=2.89moles[/tex]
According to stoichiometry:
2 moles of octane produce = 16 moles of carbon dioxide
2.89 moles of octane produce = [tex]\frac{16}{2}\times 2.89=23.1moles[/tex] of carbon dioxide
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = 1 atm
V = Volume of gas = ?
n = number of moles = 23.1
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]10.0^0C=(10+273)K=283K[/tex]
[tex]V=\frac{nRT}{P}[/tex]
[tex]V=\frac{23.1\times 0.0821Latm/K mol\times 283K}{1atm}=537L[/tex]
Thus the volume of carbon dioxide gas that is produced is 537 L
How do surface currents differ from deep ocean currents? Deepwater currents are dependent on the wind and landmasses. Deepwater currents are dependent on temperature and salinity. Deep ocean currents are affected by salinity and wind. None of the above
Answer:
surface currents are caused by winds : deep water currents are caused by difference in water density.
I guess the answer of your question is this
Answer:
Deepwater currents are dependent on temperature and salinity.
Explanation:
Is that flirting? I'm not sure and I really need to know-
Answer:
I mean ig it is, but i dk
Explanation:
Identify each of the patterns labeled in the ridge pattern diagram
Answer: The suspected and crime scene fingerprint patterns are similar which means they belong to the same individual.
Explanation:
A: Ending ridge between two lines forming a loop like structure common in both suspected and crimes scene patterns.
B: Bifurcation which includes the formation of fork like shape of the ridge.
C: Island is a dot or point like structure which is common in both patterns.
D: It includes delta which is seen in the case of loop and whorl patterns of the fingerprint in loop there is only one delta and in case of whorl there are two deltas. The delta have an island and a bifurcation in it which is common in both patterns of the fingerprints.
E: Intersection occurs when two ridges changes their directions. It is common in the two patterns.
A solution is made from 0.5 moles of sodium dichromate. If the volume of the solution is 1 Liter, what is the molarity of the solution
2 M
0.5 M
4 M
1 M
Answer:
4 M
Explanation:
See the steps and explanation in the picture
What is the concentration of kl solution if 20.68g of solute was added to enough water to form 100ml solution?
Answer:
1.25 M
Explanation:
Step 1: Given data
Mass of KI (solute): 20.68 g
Volume of the solution: 100 mL (0.100 L)
Step 2: Calculate the moles of solute
The molar mass of KI is 166.00 g/mol.
20.68 g × 1 mol/166.00 g = 0.1246 mol
Step 3: Calculate the molar concentration of KI
Molarity is equal to the moles of solute divided by the liters of solution.
M = 0.1246 mol/0.100 L= 1.25 M
The models show the phases of a substance at various temperatures. Which model BEST communicates the kinetic energy and particle arrangement of a liquid? A. Model D, because it has high kinetic energy so the particles in the model have ionized B. Model B, because it has some kinetic energy and the particles have a free flowing shape C. Model C, because it has high kinetic energy so the particles in the model have no definite shape D. Model A, because it has some kinetic energy and the particles move freely
Answer: Model B. I have included a graph for this question. Model D is incorrect because that is a model for plasma as liquid doesn't contain ionized particles. Model C is incorrect as that represents a solid. Model A is incorrect because that is showing a gas; the particles are moving very freely
According to the forces of attraction, model B communicates the kinetic energy and particle arrangement of a liquid.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
Learn more about forces of attraction,here:
https://brainly.com/question/23841038
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Your question is incomplete but most probably your full question was, The models show the phases of a substance at various temperatures. Which model BEST communicates the kinetic energy and particle arrangement of a liquid? A. Model D, because it has high kinetic energy so the particles in the model have ionized B. Model B, because it has some kinetic energy and the particles have a free flowing shape C. Model C, because it has high kinetic energy so the particles in the model have no definite shape D. Model A, because it has some kinetic energy and the particles move freely
5. Choose the best description of a reversible reaction.
a reaction that occurs in both directions at the same time
a reaction that has used up all the reactants and has stopped
a reaction that can only proceed to the right
a reaction that can only proceed to the left
Answer:
A reaction that can only move towards the right.
Explanation:
For a reversible reaction when one of the products of the reaction is removed the reaction moves towards right hand side. More and more reactants will be converted into products. This will nullify the effect of removal of product.
he image shows two air fronts moving in a region. The cold front is moving faster than the warm front.
Which will likely happen if the cold front continues to advance faster than the warm front?
Cold air will pass over the warm air, causing dry weather in the region.
Cold air will pass over the warm air, causing dry weather in the region.
Cold air will push up the warm air, resulting in heavy rainfall in the region.
Cold air will push up the warm air, resulting in heavy rainfall in the region.
Cold air will push up the warm a
Answer:
Cold air will push up the warm air, resulting in heavy rainfall in the region.
does anyone know the answer???
Answer:
ethyl ethernal
Explanation:
no explanation
Which refers to the force that one massive object exerts to attract another object?
velocity
gravity
acceleration
newt
Answer:
acceleration
mhmm..whichuksnackru?..fishnchiips OUHHHOOUUHHYESS SandyROASTthatsevenbaetterthanfishnchips
The electrons in an atom tend to assume the arrangement that gives the atom the least possible energy
T
F
The given statement is correct or true.
• The alignment of electrons in an atom is termed as the electronic configuration.
• The electrons in an atom seem to assume the alignment, which gives the atoms the least possible energy.
• This alignment of electrons is the most stable alignment and is known as the atom's ground-state electronic configuration.
• In the ground state of an atom, the electron first enters the lowest energy orbital and later subsequent electrons are aligned in order of increasing energy. This is known as the Aufbau principle.
Thus, the given statement is true or correct.
To know more about:
https://brainly.com/question/16562099
in which location are there no changes in season
a north pole
B South Pole
C equator
D antártica
Answer: I'm going to say it's Antartica because the only seasons it have is summer and winter and it doesn't change.
Explanation:
GIVING BRAINLEST ASAP IM BEING TIMED
Two adaptations to plants are described below:
Adaptation 1: A hornwort is a nonflowering plant that produces a large number of spores instead of seeds.
Adaptation 2: A kangaroo paw has tiny, woolly hairs on it that help it hold onto water droplets.
Which statement is true about these adaptations?
Both are showing adaptations to their physical characteristics.
Both are showing adaptations to their life cycles.
Adaptation 1 is an adaptation to physical characteristics, Adaptation 2 is an adaptation to life cycle.
Adaptation 1 is an adaptation to life cycle, Adaptation 2 is an adaptation to physical characteristics.
Answer:
Adaptation 1 is an adaptation to life cycle, Adaptation 2 is an adaptation to physical characteristics.
Explanation:
Answer:
Adaptation 1: A hornwort is a nonflowering plant that produces a large number of spores instead of seeds
To determine the concentration of a sodium thiosulfate solution as in this experiment, a student pipetted 25.0 mL of 0.0100 M potassium iodate (KIO3) solution into a 125 mL Erlernmeyer flask. Potassium iodide and sulfuric acid were added as in this experiment. The titration needed 15.21 mL of the sodium thiosulfate to reach the end point. What is the concentration of the sodium thiosulfate solution
Answer:
0.0986M is the concentration of the Na₂S₂O₃ solution
Explanation:
Potassium iodate, KIO₃, reacts with sodium thiosulfate, Na₂S₂O₃, as follows:
KIO₃ + 6Na₂S₂O₃ +5KI + 3H₂SO₄ → 3H₂O + 3K₂SO₄ + 3Na₂S₄O₆ + 6NaI
To solve this question we must find the moles of sodium thiosulfate that reacts as follows:
Moles KIO₃:
0.0250L * (0.0100mol / L) = 2.5x10⁻⁴moles KIO₃
Moles Na₂S₂O₃:
2.5x10⁻⁴moles KIO₃ * (6mol Na₂S₂O₃ / 1mol KIO₃) = 1.5x10⁻³ moles Na₂S₂O₃
Molar concentration:
1.5x10⁻³ moles Na₂S₂O₃ / 0.01521L =
0.0986M is the concentration of the Na₂S₂O₃ solutionhelp me with this question?!!
Answer:
Glow sticks and match would be light emission, slime would be preciptate, and cookies would be gas.
Explanation:
Which of the following is true according the the Arrhenius theory of acids?
A strong acid increases the OH-ion concentration in an aqueous solution.
A strong acid decreases the OH-ion concentration in an aqueous solution.
O A strong acid decreases the H+ and OH-ion concentration in an aqueous
solution.
A strong acid increases the H+ ion concentration in an aqueous solution.
How many molecules of CO2 at standard temperature and pressure in 5.4 moles of CO2
Answer:
3.25×10²⁴ molecules.
Explanation:
From the question given above, the following data were obtained:
Number of mole of CO₂ = 5.4 moles
Number of molecules of CO₂ =?
The number of molecules of CO₂ in 5.4 moles can be obtained as follow:
From Avogadro's hypothesis,
1 mole of CO₂ = 6.02×10²³ molecules
Therefore,
5.4 moles of CO₂ = 5.4 × 6.02×10²³
5.4 moles of CO₂ = 3.25×10²⁴ molecules
Thus, 5.4 moles of CO₂ contains 3.25×10²⁴ molecules.
PLEASE HELP WILL GIVG BRAINLEST
Answer:
It is option #1.
Explanation:
Biotechnology is defined as, "The exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganisms for the production of antibiotics, hormones, etc."
Therefore, option #1 is your answer!
does water burn? for my sister that says water does burn
Answer:
No, water doesn't burn. It only can burn under specific conditions in a lab.
Explanation:
help Tell me the answer.
Answer:
it's easy u just have to put them in a calculator the way they are it will give you your answer atleast I think so hope this helps
How many mL of isopropyl alcohol solution (40% v/v) would contain 2.5 mL of isopropyl alcohol? Report your answer in mL
Answer:
[tex]V_{solution}=6.25mL[/tex]
Explanation:
Hello there!
In this case, given the by-volume percent and the volume of isopropyl alcohol as the solute, we can compute the volume of the solution via:
[tex]\% v/v=\frac{V_{solute}}{V_{solution}} *100\%\\\\V_{solution}=\frac{V_{solute}}{\% v/v} *100\%[/tex]
Now, we plug in the given data to obtain:
[tex]V_{solution}=\frac{2.5mL}{40\%} *100\%\\\\V_{solution}=6.25mL[/tex]
Best regards!