Answer:
B; 4 L
Explanation:
From the Boyle’s law of gases, the volume occupied by a given mass of gas is inversely proportional to the pressure exerted by the gas
Mathematically, we have this as;
PV = K
Given;
P1 = 2 atm
V1 = 12 l
P2 = 6 atm
V2 = ?
We have that;
P1V1 = P2V2
2 * 12 = 6 * V2
V2 = (2 * 12)/6
V2 = 24/6
V2 = 4 L
In the combustion reaction between propane and oxygen gas, if 44.0 g of propane is burned
in 160.0g of oxygen. How many total grams of products will be formed if the Law of
Conservation of Mass is fulfilled?
A.116.0g B.126.0g C.204.0g D.214.0g
What change in volume results if 170.0 mL of gas is cooled from 30.0 °C to 20.0 °C? (CHARLES LAW)
Answer:
164.4 L
Explanation:
use charles' law formula Volume 1 over Temp. 1 equaled to Volume 2 over Temp. 2
How many atoms are in 0.256 mol Fe?
For this one, you can use the formula:
# of atoms = # of moles * Avogadro's number
# of atoms = (0.256 mol) * (6.02 * 10^23)
# of atoms = 1.54 * 10^23 atoms
Hope It helped you!
Atoms are the smallest unit of molecules. In 0.256 mol of iron, there are 1.54 × 10²³ atoms.
What are atoms?Atoms are small entities of the compound or the molecule that can be measured by Avogadro's number. The number of atoms can be given as the product of the moles and the Avogadro's number.
If 1 mole of iron = 6.02 × 10²³
Then, 0.256 moles = 0.256 × 6.02 × 10²³
Therefore, 1.54 × 10²³ atoms of iron are present in 0.256 moles.
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Equal chemical equations!
H2 + Cl2 ----> HCl
P4 + O2 ----> P4O10
Na + Cl2 ----> NaCl
CH4 + O2 ----> CO2 + H2O
Answer:Na+Cl2---->NaCl
Explanation:
Answer:
I've balanced the equations.
They are in the attached image.
The values in red are the added number to make the equation balanced .
An aluminum soft drink can is approximately 0.55 moles of aluminum. How many
aluminum atoms are used in manufacturing each soft drink can?
Explanation:
Round 87.073 meters to 3 significant figures. write your answer in scientific notation. step 1: 87.073 rounds to step 2: write scientific notation : meters...
One mole of aluminum contains 6.022 × 10²³ atoms. This number is called Avogadro number. Therefore, 0.55 moles of aluminum contains 3.31 × 10²³ atoms.
What is Avogadro number ?One mole of any substance contains 6.022 × 10²³ atoms. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Aluminum is 13th element in periodic table. It shows metallic properties as well as some non-metallic properties. The symbol of aluminum is Al. It forms compounds mostly through covalent bonding.
One mole of aluminum contains 6.022 × 10²³ atoms.
Thus, number of atoms in 0.55 moles = 0.55 × 6.022 × 10²³ = 3.31 × 10²³ atoms.
Therefore, the number of Al atoms in 0.55 moles is 3.31 × 10²³ .
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Which of the following would make it easier for a plant to do photosynthesis?
O Colorful flowers
O Very large leaves.
Very tall stem.
O Short roots
How is sedimentary rocks formed?
Answer:
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension
Explanation:
If a combination reaction takes place between lithium and fluorine, the chemical formula for the product is A. LF B. LiF C. LiF2 D. Li2F
FOR BRAINLIST!!!
A Student 1
B Student 2
C Student 3
D Student 4
Answer:
Student 2
Explanation:
I am not 100% sure but I would say Student 2
:)
i agree with the other answer
The graph below shows distance over time. Which of these situations
could be represented by this graph?
Pls answer quick
Answer:
the second option
Explanation:
look at the distance where the meet up at the house and the go to school
Question 21 of 25
Which of the following best describes an Arrhenius acid-base reaction?
O A. Acid + base = H+ + OH-
B. Acid + base = salt + water
C. Acid + base = conjugate base + conjugate acid
D. Acid + base =
H20
Answer:
B. Acid + base = salt + water
Explanation:
In accordance to the proposal of a scientist called Svante Arrhenius, an acid is a substance that increases the H+ concentration of a solution by dissociating into it while the base increases the OH- concentration of a solution by dissociating into it. Furthermore, Arrhenius stated that this two ions combine in an aqueous solution to give water.
Hence, Arrhenius acid-base reaction is the combination of an acid and base to produce salt and water as products. That is; Acid + base = salt + water.
substances decrease in size on __ (heating/ cooling) and contract.
A buffer solution contains 0.345 M acetic acid and 0.377 M sodium acetate . If 0.0613 moles of potassium hydroxide are added to 250 mL of this buffer, what is the pH of the resulting solution ? (Assume that the volume does not change upon adding potassium hydroxide. )
Answer:
pH = 5.54
Explanation:
The pH of a buffer solution is given by the Henderson-Hasselbach (H-H) equation:
pH = pKa + log[tex]\frac{[CH_3COO^-]}{[CH_3COOH]}[/tex]For acetic acid, pKa = 4.75.
We calculate the original number of moles for acetic acid and acetate, using the given concentrations and volume:
CH₃COO⁻ ⇒ 0.377 M * 0.250 L = 0.0942 mol CH₃COO⁻ CH₃COOH ⇒ 0.345 M * 0.250 L = 0.0862 mol CH₃COOHThe number of CH₃COO⁻ moles will increase with the added moles of KOH while the number of CH₃COOH moles will decrease by the same amount.
Now we use the H-H equation to calculate the new pH, by using the new concentrations:
pH = 4.75 + log[tex]\frac{(0.0942+0.0613)mol/0.250L}{(0.0862-0.0613)mol/0.250L}[/tex] = 5.54In which of these two states of matter is water the least dense: solid or liquid?
Answer:
liquid
Explanation:
it is only the thing in what water can disslove
Select the structure that corresponds
to the name:
3,5,6-trichloro-2-heptanol
Answer:C both
Explanation:
The Structure that correspondsto the name: 3,5,6-trichloro-2-heptanol is C both.
How nomenclature is done in organic compound ? First name the principal carbon chain and also check type of bonds single or double present on the carbon chain. Name the functional group according to Seniority table. Name the substituent alphabetically. Both are isomers∵ all are substituent and OH alcohol is added on the principal carbon chain both names are suggested.
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Determine the number of grams of carbon-14 remaining in this sample at 17,100 years.
Answer: I need help
Explanation:
0.24 moles of a gaseous product from a reaction is collected in a 25.0-L container at a pressure of 300.0 kPa. Determine the temperature (in °C) at which the gas was collected.
Answer:
3428.58 °C
Explanation:
We'll begin by converting 300 KPa to atm. This can be obtained as follow:
101.325 KPa = 1 atm
Therefore,
300 KPa = 300 KPa × 1 atm / 101.325 KPa
300 KPa = 2.96 atm
Next, we shall determine the temperature. This can be obtained as follow:
Number of mole (n) = 0.24 mole
Volume (V) = 25 L
Pressure (P) = 2.96 atm
Gas constant (R) = 0.0821 atm.L/Kmol
Temperature (T) =?
PV = nRT
2.96 × 25 = 0.24 × 0.0821 × T
74 = 0.24 × 0.0821 × T
Divide both side by 0.25 × 0.0821
T = 74 / (0.24 × 0.0821)
T = 3755.58 K
Finally, we shall convert 3755.58 K to °C. This can be obtained as followb:
T(°C) = T(K) – 273
T(K) = 3755.58 K
T(°C) = 3755.58 – 273
T(°C) = 3428.58 °C
Thus, the temperature at which the gas was collected is 3428.58 °C
How do I balance coefficient equations
Answer:
In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.
Answer: When you balance a chemical equation, you change coefficients. You never change subscripts. A coefficient is a whole number multiplier. To balance a chemical equation, you add these whole number multipliers (coefficients) to make sure that there are the same number of atoms on each side of the arrow.
Explanation:
what is the reaction type for Zn(C2H3O2)2 + Na3(PO4)?
Answer: This is a precipitation reaction: Zn 3(PO 4) 2 is the formed precipitate.
Explanation:
Go this Answer form, (chemequations.com)
Im Glad I helped! =)
How do you think our understanding of genes might affect doctors ability to treat or prevent disease in the future?
Answer:
dentifying genetic variants Genome sequencing has the potential to improve the diagnosis of conditions caused by changes in the DNA and indicate what treatments may be most effective. Importantly, it may also red-flag treatments likely to cause adverse reactions.
Explanation:
Answer:
Identifying genetic variants Genome sequencing has the potential to improve the diagnosis of conditions caused by changes in the DNA and indicate what treatments may be most effective. Importantly, it may also red-flag treatments likely to cause adverse reactions.
Explanation:
How can you use the Periodic Table of Elements to help you find information about specific elements? PLZZZ HELP MEEEEEE!!!!
Answer:
Yuh imma help-........
Which structure is unique to vertebrates?
limbs
brain
skin
backbone
Answer:
Backbone
Explanation:
Organisms that have backbones are known as vertebrates, while the ones without a backbone are classified as invertebrates.
The structure that is unique to vertebrates is the backbone.
What are vertebrates?Vertebrate, also known as the Craniata. It is the type of animal where it should be predominant of subphylum. Moreover, it contains the backbones. The animal or the organism that have the backbones that we called as the vertebrates however the organism or animal that does not have any backbone is known as the invertebrates
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what is fermentation
Fermentation is a metabolic method that creates chemical changes in natural substrates through the action of enzymes.
Explanation: hope this helps :)
What is the volume of an object with the mass of 7.9 grams in the density of 2.28g/ml.
Answer:
3.7mL is the volume of the object
Explanation:
To convert the mass of any object to volume we must use density that is defined as the ratio between mass of the object and the space that is occupying. For an object that weighs 7.9g and the density is 2.28g/mL, the volume is:
7.9g * (1mL / 2.28mL) =
3.7mL is the volume of the objectI need to know why the particles at the surface in the image below have surface tension while the particles below the surface do not.
Your friend John is having trouble with his compost bin. The material in his compost pile doesn't seem to be decomposing
well. You take a sample of the pole and check for the presence of microorganisms under the microscope You see that there
are indeed microorganisms, however, they don't appear to be growing very fast John says that he regularly mixes his
compost pile to expose it to oxygen What is the most likely explanation for this problem?
The temperature may not be high enough to encourage microorganism growth
Inorganic materials may have been included in the compost pile
The temperature may be too high for microorganisms to tolerate
Inappropriate food waste may have been included in the compost pile
Some factories that burn coal produce smoke with harmful chemicals, such as sulfur. Scrubbers are devices that are attached to the smokestacks to reduce the amount of sulfur put into the atmosphere. To evaluate the effectiveness of these devices, what data would need to be collected?
Answer:
4.5 CH4 (g) + 2 O2 (g) CO2 (g) + 2H2O (l) +ENERGY Hydrocarbon fuels like methane (CH4) burn in the presence of oxygen to produce carbon dioxide and water. This process of combustion releases energy. When energy is released during the course of a chemical
Explanation:
Why is boiling water a physical change
Answer:
it is cleaning the water and heating it
Answer:
When boiling the water, the water will begin to evaporate and thats the physical change.
before phase change: molecules move around each other 15. The medicine in the diagram above has molecules that are moving around each other. The doctor needs to slow down the molecules enough to cause a phase change. How will she do this, and how will this affect the medicine? I She transfers energy ... a into the medicine until it is a liquid. b) into the medicine until it is a gas. C out of the medicine until it is a solid. d out of the medicine until it is a liquid. LE 1 21 Illuminate Education, Inc.
Answer:
She transfers energy out of the medicine until it is solid. So the answer would be C.
Explanation:
According to the forces of attraction , molecules can be slowed down by moving out of the medicine until it is a solid , it will decrease the rate of absorption of medicine.
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.
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A room is filled with 45.0 kg of Nitrogen gas (N2). If the temperature of the gas is 26.0 degrees C and has a pressure of 794 torr, what is the volume of the room, in gallons? (1 gal = 3.785 L)
Hi this is not a answer but I just wanna warn you so listen to these person just in case u see that scammer