Answer:
9.72 moles.
Explanation:
From the question given above, the following data were obtained:
Mass of H₂O = 175 g
Number of mole H₂O =?
Next, we shall determine the molar mass of H₂O. This can be obtained as follow:
Molar mass of H₂O = (2×1) + 16
= 2 + 16
= 18 g/mol
Finally, we shall determine the number of mole H₂O. This can be obtained as follow:
Mass of H₂O = 175 g
Molar mass of H₂O = 18 g/mol
Number of mole of H₂O =?
Mole = mass /Molar mass
Number of mole of H₂O = 175/18
Number of mole of H₂O = 9.72 moles
what element has 1 proton, 1 neutron, and 2 electrons?
Answer:
Tritium
Tritium is a hydrogen isotope consisting of one proton, two neutrons and one electron. It is radioactive, with a half-life of 12.32 years.
Explanation:
hope it helps :)))
The element which possess one neutron, one proton and two electrons is helium, He. The atomic number of helium is 2 in periodic table and have a mass number of 4 also.
What is helium ?Helium is second element in the periodic table. It is a noble gas and thus unreactive because its valence shell is completely filled and thus helium is placed in the noble gas group 18.
Atomic number of an element is number of electrons in it. For a neutral atom the number of electrons and protons are equal. Thus, all the positive charges is neutralised by equal number of electrons.
Neutrons have no charge and thus, they are neutral. Atoms forms positive ions when number of protons dominate and they will form negative ions if they gain electron and thus number of electrons dominates.
The sum of number of protons and neutrons is called mass number of the element. Helium contains 2 neutron and 2 oproton, thus its mass number is 4 and its atomic number is two.
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What do a fruit salad, a carbonated beverage, and a pile of clothes have in common?
Answer:
They're all mixtures of something
Explanation:
Which Kingdom does the organism belong to?
Animalia
Protista
Fungi
Plantae
pls help guys
Why is Pluto a dwarf planet?
Group of answer choices
A) it can't clear its orbital path of smaller objects
B) its not round
C) its too far away from the sun
D) it doesn't orbit the sun
Please help me fast What is the Molarity of 100g of Vit. C (C6HBO6) with 2.5L of water?
Which example is NOT a chemical change? *
A. Hydrogen peroxide bubbles in an open wound on your skin.
B. Piece of pizza digested when eaten.
C. Rotting Easter eggs. .
D. Dissolving salt in water.
Answer:
The answer would be D as no chemical change is occuring.
Explanation:
Answer:
D. Dissolving salt in water.
Explanation:
No chemical change is actually occurring when salt is added to water
which of the following is not found in the tropical rainforest?
a.ilang - ilang b. wild pigs c.ferns d. shark
Answer:
B. Wild Pigs!!!!!!!!
A nonvolatile organic compound Z was used to make up a solution. Solution A contains 6.00 g of Zdissolved in 100 g of waterand has a vapor pressure of 754.5 mmHgat the normal boiling point of water. Calculate the molar mass of Z in solution A.
Answer:
Molar mass of Z in solution A is 148.2 g/mol.
Explanation:
To solve this, we need to use colligative property about vapor pressure.
In any ideal solution, the vapor pressure of solution is lower than vapor pressure of pure solvent. Formula is:
ΔP = P° . Xm
ΔP = Vapor pressure of pure solvent - Vapor pressure of solution
At the normal boiling point of water (100°C), vapor pressure is 760 mmHg.
Let's replace in the formula, to find out Xm (mole fraction of solute)
760 mmHg - 754.5 mmHg = 760 mmHg . Xm
(760 mmHg - 754.5 mmHg) / 760 mmHg = Xm
Xm → 0.00724
Mole fraction of solute = moles of solute /total moles (st + sv)
In this case, our mole fraction will be
(6 g / MM) / ( (6 g/ MM + 100 g / 18g/mol) = 0.00724
Our unknown is MM (molar mass of Z). We solve the equation:
6 g / MM = 0.00724 . ((6 g/ MM + 100 g / 18g/mol))
6 g / MM = 0.04344 g /MM + 0.0402 g/mol
6 g/MM - 0.04344 g /MM = 0.0402 g/mol
5.95656 /MM = 0.0402 g/mol
5.95656 / 0.0402 g/mol = MM → 148.2 g/mol
The molar mass of Z in solution A is 150 g/mol.
Based on the given information,
• The mass of water given is 100 grams.
• The mass of solute given is 6 grams.
• It is known that the molar mass of water is 18 gram per mole.
Now the moles of water can be calculated as,
[tex]n = \frac{mass}{molar mass}[/tex]
Now putting the values we get,
[tex]n = \frac{100 g}{18 g/mol} \\n = 5.5556 moles[/tex]
• It is known that the vapor pressure of water at 100 degree C (Po) is 760 mmHg.
• The given vapor pressure of solution at 100 degree C is 754.5 mmHg.
• Based on Raoult's law, the vapor pressure of solution = mole fraction of water * Po of water.
The mole fraction of water is,
[tex]= \frac{754.5 mmHg}{760 mmHg} \\= 0.9928[/tex]
The mole fraction of solute is,
[tex]= 1-0.9928\\= 0.00722[/tex]
The mole fraction of solute = n1/n1+n2
Now putting the values we get,
[tex]\frac{n1}{n1+n2} = 0.00722\\\frac{n1+n2}{n1} = \frac{1}{0.00722} \\[/tex]
[tex]\frac{n1+5.56 mol}{n1} = 138.50\\n1 = \frac{5.56 mol}{138.50} \\n1 = 0.040 mol[/tex]
Now the molar mass of solute, Z is,
[tex]Molar mass = \frac{mass}{moles} \\Molar mass = \frac{6.0 grams}{0.04 mol} \\Molar mass = 150 g/mol[/tex]
Thus, the molar mass of Z in solution A is 150 g/mol.
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1 point
5. A drug or other chemical compound whose manufacture, distribution,
possession, and use is regulated by the legal system is referred to as a
poison.
a.poison
b. narcotic
c. toxin
d. controlled substance
I'm pretty sure its D because if it's manufactured and distributed its likely not toxin or poison. a narcotic could be a controlled substance so that's why I'm leaning towards D
How would you make up 75 ml of a 45 mg/ml BSA solution?
Answer: see below
Explanation: for 75 ml, take 45*75 mg of BSA and make up to 75 mL with distilled water.
What is the difference between a homogenous and a heterogeneous?
Answer:
Explanation:
A homogeneous mixture consists of one single phase while a heterogeneous mixture consists of two or more phases.
Which statement best describes how an electromagnetic motor works?
Electrons are moved through a magnet, creating a circuit. That circuit interacts with a current, moving the
conductor in the orientation of the field
Electrons are moved through a current, creating a circuit. That circuit interacts with a magnet, moving the
conductor in the onentation of the field.
Elections are moved through a circuit, creating a current That current interacts with a magnet, moving the
conductor in the orientation of the field
Electrons are moved through a magnet creating a current. That current interacts with a circuit, moving the
conductor in the onentation of the field
Answer:
electrons are moved through a magnet creating a current. the current instracts with a circuit, moving the conductor in the onentation of the field
camouflage
2. chemical warfare
3. commensalism
4. indicator species
5. interspecific competition
a relationship in which one
organism lives in or on another organism
and benefits from that relationship while
the host organism is harmed by it
those species that normally live
and thrive in a particular community
species that play critical roles in
their communities and help determine
the types and numbers of other species
in a community
association in which one organism
is benefited and the other organism is
neither benefited nor harmed
20
species that serve as early
warnings of damage to a community or
ecosystem
competition between species for
shared or limited resources
using chemical substances to kill or
injure predator or prey
species that migrate or are
deliberately introduced into a community
where they would not normally live
a relationship between two kinds
of organisms that benefits both
blending in with one's
surroundings
an adaptation in which an animalis
protected against predators by its
6. invasive
7. keystone species
8. mimicry
9. mutualism
10. native species
11 parasitism
If the initial temperature of a movable cylinder was 130 degrees Celsius
with a pressure of 1 ATM and an initial volume of 2 Liters, what would
the new volume be if the temperature was lowered to 324 degrees Kelvin
and the pressure was raised to 1.1 ATM?
Answer: The new volume will be 1.5 L
Explanation:
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 1 atm
[tex]P_2[/tex] = final pressure of gas = 1.1 atm
[tex]V_1[/tex] = initial volume of gas = 2 L
[tex]V_2[/tex] = final volume of gas = ?
[tex]T_1[/tex] = initial temperature of gas = [tex]130^0C=(130+273)K=403K[/tex]
[tex]T_2[/tex] = final temperature of gas = [tex]324K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{1\times 2}{403}=\frac{1.1\times V_2}{324}[/tex]
[tex]V_2=1.5L[/tex]
The new volume will be 1.5 L
An object has a mass of 15.2 g and a volume of 8.9 mL.
What is the density of the object?
Answer:
recordando también que ** 1mL = 1cm ^ 3 **
(como ** 1 dm ^ 3 = 1 L **)
when energy transforms, which of the following does it produce?
A. heat
B. light
C. sound
D. motion
motion
Explanation:
it works in our daily life
I need 11 12. 13. 14. 15. And 16 please and thank you ❤
Answer:
11.) Radio
12.) Microwave
13.) Infrared
14.) Ultraviolet
15.) X-Ray
16.) Gamma Ray
Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.
similarities between mole and MOL
How do you negatively affect the ecosystem of the Great Lakes area?
Answer:
Threats to the Great Lakes' ecosystems, include invasive species, climate change, pollution, and habitat destruction. Climate change affects water temperatures, weather patterns, and lake levels. Pollutants from residential, agricultural, and industrial areas reduce water quality.
Explanation:
I hope this helps answer your question
:D
Answer:
Other human activities that have had an impact on the Great Lakes include intentional water level regulation, man-made alterations such as dredging, diversions, and water withdrawals, which have resulted in earlier thawing of the lakes, lower water levels, and, of course, the spread of industrial waste.
Explanation:
The sexual reproduction of plants occurs through what process? (2 points)
a
Finalization
b
Fermentation
c
Pollen production
d
Pollination
Answer:
Pollination
Explanation: Involves production of male and female. Sexual reproduction is also the flowering of plants.
Grasses living in an area have shallow but widespread roots that grab
the ground. They can grow their leaves fast even after losing them.
What can we say about these plants?
What is the meaning of matter?
Answer:
Explanation:
physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
Answer:
Anything that takes up space.
Explanation:
Anything that has both volume and mass.
You are given a sample of an unknown solution and are tasked with determining the density. The solution is miscible with water, so you cannot use a float test. To complete this task, you begin by obtaining a clean dry beaker and measure its mass on a balance (120.3621 g). You then use a pipet to transfer the liquid into the beaker. The initial reading on your pipet is 4.126 mL and after you have dispensed the liquid the pipet reads 6.518 mL. You then obtain the mass of the beaker with the liquid inside (123.0194 g).
_____g/mL
Answer: 1.11 g/mL
Explanation:
Density = mass/vol
mass 123.0194-120.3621g = 2.6574
vol 6.518-4.126 ml = 2.392
Write the complete balanced chemical equation _A+_BC3->_AC2 +_ B
Answer:
Prueba con tus argumentos quienes sufren mas con la violencia?
Answer:
Sure! The complete balanced chemical equation for the reaction you provided is: `2A + BC3 -> AC2 + 3B`.
PLEASE MARK AS BRAINLIESTAs you are standing on the beach, the waves appear to be coming towards you. What is actually moving forward and why? A Water is moving towards you replacing the old water because of the winds B Water is moving towards you replacing the old water because of currents C Energy created by currents is moving towards you, and not the water itself. D Energy created by the wind is moving towards you, and not the water itself.
Answer:
B
Explanation:
Because unless you are walking towards it and the ocean is not moving then only you are moving
What is the difference between a renewable and non-renewable source of energy? Give 3 examples of each.
Answer:
There are two major categories of energy: renewable and non-renewable.
Non-renewable energy resources are available in limited supplies, usually because they take a long time to replenish. The advantage of these non-renewable resources is that power plants that use them are able to produce more power on demand. The non-renewable energy resources are:
CoalNuclearOilNatural gasRenewable resources, on the other hand, replenish themselves. The five major renewable energy resources are:
SolarWindWater, also called hydroBiomass, or organic material from plants and animalsGeothermal, which is naturally occurring heat from the earthWhile renewable energy resources have the advantage of unlimited supply over the long haul, they are limited in their availability at any given moment.
For example, the sun rises each day, but its ability to generate power is limited when its cloudy. Another disadvantage is that power plant operators can’t crank up renewable energy production when people are consuming more power, such as on a hot day when many people are running air conditioners at the same time.
Balance each of the following equations by placing coefficients in front of the formulas as needed MgO(s) Mg(s) + 02(8) ZnCI.(ag)
Is the equation wrong. Such a equation cannot be formed. pls enter the write equation i will help you
Naming lonic Compounds
Name the following lonic Compounds using the lonic naming rules. Remember, place the metal's name
first, followed by the non-metal element, replacing the ending with ide"
1.SrBr,
2.NaCl
3. Mgs
4. LIP
5. Ko
6. Ca N,
7. Balz
Answer:
1.storantium bromide
2.sodium chloride
3.magnesium sulphide
4.lithium polymer
5.potassium hydroxide
6.calcium nitride
7.it decomposition of tetrafluroborates and hexaflurophosphates
WILL AWARD BRAINLIEST!!! A chemist performs a reaction combining 100.1 g of aluminum chloride (AlCl3), and 57.2 g of sodium hydroxide (NaOH). The products are aluminum hydroxide (Al(OH)3) and sodium chloride (NaCl).
a. Please write out the balanced equation for this reaction.
b. Assuming all the aluminum chloride is consumed in this reaction, how many grams of aluminum hydroxide will form? Work must be shown to earn credit.
c. If all the sodium hydroxide is used up, how many grams of aluminum hydroxide can be formed? Work must be shown to earn credit.
d. What is the theoretical yield of this reaction? Which reagent is limiting? Explain your answer.
a.The balanced reaction between [tex]AlCl_3[/tex] and NaOH is:
[tex]AlCl_3 + 3NaOH[/tex] → [tex]Al(OH)_3 + 3NaCl[/tex] is the balanced reaction.
b.58.55g of aluminum hydroxide will form? Work must be shown to earn credit
c. 6.50 g grams of aluminum hydroxide can be formed.
d.[tex]Al(OH)_3[/tex] produced from NaOH is less, NaOH will be the limiting reagent. The amount of [tex]Al(OH)_3[/tex] actually produced is 4.13 g.
What is a balanced chemical equation?An equation that has an equal number of atoms of each element on both sides of the equation is called a balanced chemical equation.
a.The balanced reaction between [tex]AlCl_3[/tex] and NaOH is:
[tex]AlCl_3 + 3NaOH[/tex] → [tex]Al(OH)_3 + 3NaCl[/tex] is the balanced reaction.
b) Given mass of [tex]AlCl_3[/tex] = 100.1 g
Molar mass of [tex]AlCl_3[/tex] = 133.34 g/mol
moles of [tex]AlCl_3[/tex] = 100.1 g ÷133.34 = 0.7507 moles
Based on the reaction stoichiometry:
1 mole of [tex]AlCl_3[/tex] produces 1 mole of [tex]Al(OH)_3[/tex]
# moles of [tex]Al(OH)_3[/tex] = 0.7507 moles
Molar mass [tex]Al(OH)_3[/tex] = 78 g/mol
Amount of [tex]Al(OH)_3[/tex] produced = 0.7507 moles x 78 = 58.55g
c) Given mass of NaOH = 57.2 g
Molar mass of NaOH= 40 g/mol
moles of NaOH = 57.2 g ÷ 40 = 1.43 moles
Based on the reaction stoichiometry:
3 moles of NaOH produces 1 mole of [tex]Al(OH)_3[/tex]
moles of [tex]Al(OH)_3[/tex] produced = 1.43÷ 3 = 0.4766 moles
Molar mass [tex]Al(OH)_3[/tex] = 78 g/mol
Amount of [tex]Al(OH)_3[/tex] produced = 0.4766 78 = 6.50 g
d) Since moles of [tex]Al(OH)_3[/tex] produced from NaOH is less, NaOH will be the limiting reagent. The amount of [tex]Al(OH)_3[/tex] actually produced is 6.50 g.
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If false rewrite the statements to make them correct True or False.
1. Only particles in the solid state are in motion.
2. The particles of a solid have more energy than those of a gas.
3. In a glass of iced tea, tea is the solute.