The hydronium ion concentration when pH = 7 is : 8.75 * 10⁻⁹ mole/liter
Determine hydronium ion concentration when pH = 7
Given that :
pH = 8.0
Hydronium ion concentration = 1 * 10⁻⁸ mole/liter
Resolving the question
8.0 = 1 * 10⁻⁸ mole/liter
7.0 = x
therefore :
x = 7 ( 1 * 10⁻⁸ ) / 8.0
= 8.75 * 10⁻⁹ mole/liter
Hence we can conclude that The hydronium ion concentration when pH = 7 is : 8.75 * 10⁻⁹ mole/liter
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Which option is a nonrenewable resource?
O at least some types of lumber
O solar energy
O oil
O wind
ILL GIVE A BRAINLY PLS HELP
1.) How many O atoms are present in 5.00 moles of H2O?
a.)
3.01x1024 atoms
b.)
3.01 atoms
c.)
5 atoms
d.)
6.02x1024 atoms
2.) A sample of CO2 contains 1.8x1024 molecules. How many moles of carbon dioxide are in this sample?
a.)
6.02x1023 mol
b.)
3 mol
c.)
1.8 mol
d.)
3x1024 mol
Atoms are the unit of the molecule of the compound. The 3.01 x 10²⁴ atoms of oxygen are present in 5 moles of water and 3 moles of carbon dioxide in the sample.
What are atoms?Atoms are the smallest fundamental unit of the compounds that can be given by Avogadro's number.
For calculating the oxygen atoms in 5 mole water:
If 1 mole = 6.02 × 10²³
Then, 5 moles = 5 × 6.02 × 10²³
Hence, 3.01 x 10²⁴ atoms of oxygen are present in 5 moles of water.
Moles of carbon dioxide in the sample is calculated as:
If 1 mole of carbon dioxide = 6.02 × 10²³ molecules
Then moles in 1.8 x 10²⁴ molecules will be,
(1.8 x 10²⁴ molecules) ÷ (6.02 × 10²³ molecules) = 3 moles
Hence, 3 moles of carbon dioxide is present in the sample.
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1 Identify Draw an example of a force acting on an object.
Answer:
Answer below
Explanation:
Just draw a photo of someone pushing an object across a table. Your push is the force acting on the object you're pushing.
Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?.
The elements that chlorine will most readily bond with are elements found in group one eg sodium, potassium, etc.
What is group of elements?Elements are arranged in groups in the periodic table based on their number of valance electrons.
Elements in the same group of the periodic table has similar characteristics.
Reaction between metals and nonmetalsWhen metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms, forming ions.
The resulting compound is called an ionic compound.
Chlorine is the most reactive non metal and will bond easily with metals. The most reactive metals are found in group one.
Example of chlorine reaction with a group one elementCl⁻ + Na⁺ -------> NaCl
Thus, the elements that chlorine will most readily bond with are elements found in group one eg sodium, potassium, etc.
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As the temperature increases to the ice cube's equilibrium stage, the average kinetic energy of the molecules….?
increases
decreases
remains the same
increases and then decreases
Answer:
Increase
Explanation:
if the temperature is increasing it will be slowly melting the ice causing it to turn into a liquid which will make the kinetic energy in the molecules increase.
for now pliss help me
Answer:
the nucleoid
Explanation:
Describe the type of force which exists between particles in an Ideal gas. Explain why this type of force exists between the particles.
The Intermolecular force is a type of force which exists between particles in an Ideal gas.
What type of force which exists between particles in an Ideal gas?Intermolecular forces are considered weaker attractions that hold molecules in gas close together. This force of attraction is present between molecules or particles.
So we can conclude that the Intermolecular force is a type of force which exists between particles in an Ideal gas.
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I NEED HELP ASAP!!!!!!!!!!!
WITHIN THE HOUR
Thanks
Answer:
C
Explanation:
Actually, arranged to the size of smallest to least atom radius size = C
Atomic sizes generally get smaller as you go from L to R across a row of the periodic table.
The
gas pressure in an oxygen tank is 3.90 atm at a
If temperature of 298 K. If the pressure decreases to 3.20 atm,
what is the temperature of the gas in kelvin?
Answer: …
Explanation:
trru or false
The atomic number for lithium is 17.
Answer:
False; the correct atomic number for lithuim is 3
Explanation:
Answer to back it up
~rere
a woman put her clothes in the dryer.There is a mix of wool and cotton. After the dryer is finished wool clothes and cotton clothes are stuck together. There's no wool stuck to wool or cotton stuck to cotton.using laws of charge, explain why this is the case
Answer:
Explanation:
Explanation
There is a Plus charge on one of them (I think it is likely the wool).
There is a minus charge on the other one (So it is cotton most likely.
The point is that like charges repel (move away from each other)
Unlike charges attract. (move close to each other.)
You have a case of unlike charges attracting.
Which type of electromagnetic waves are dangerous enough to be used to kill cancerous cells?
gamma rays
visible light
infrared light
microwaves
Answer:
Gamma rays
Since they have high penetrating power.
Answer:
A
Explanation:
Compare the properties of the four state of matter in terms of particle arrangement, particle motion, shape,
size, and compressibility
Solid-
shape-retains a fixed volume and shapenot easily compressibledoes not flow easily , Particles in a solid are tightly packed, usually in a regular pattern. Particles in a solid vibrate (jiggle) but generally do not move from place to place.liquid-
shape-assumes the shape of the part of the container which it occupiesnot easily compressibleParticles in a liquid are close together with no regular arrangement. Particles in a liquid vibrate, move about, and slide past each other.Gas-
shape-assumes the shape and volume of its containercompressibleParticles in a gas are well separated with no regular arrangement. Particles in a gas vibrate and move freely at high speeds.Plasma-
shape-variable volume and shapePlasma is slightly different from the other phases of matter, in that the high temperatures cause the atoms/particles to break apart into electrons and nuclei. This mixture of electrons and nuclei act similarly to gas particles, moving freely and have no distinct arrangement.Calculate the volume of 100. grams of oxygen gas (O₂) at 25.0°C and a pressure of 1.25 atm.
Ideal gas law states
PV = n(RT)V is volume (L), P is pressure (atm), R is universal gas constant: 0.0821 L·atm/mol· K, n is number of moles, T is temperature in Kelvin
Here given:
[tex]\blacksquare[/tex] mass of O₂ : 100 gram
[tex]\blacksquare[/tex] moles: mass/molar mass = 100/32 = 3.125 moles
[tex]\blacksquare[/tex] 25.0 °C = (25+273.15) = 298.15 K
[tex]\blacksquare[/tex] pressure: 1.25 atm
Volume:
[tex]\boxed{\sf V=\dfrac{nRT}{P}}[/tex]
[tex]\Rightarrow \sf V=\dfrac{(3.125 \ x \ 0.0821 \ x \ 298.15 )}{1.25}[/tex]
[tex]\Rightarrow \sf V=61.195 \ L[/tex]
[tex]\Rightarrow \sf V=61.2 \ L \ \ \ (rounded \ to \ nearest \ tenth)[/tex]
Additional Explanation:
Volume can be counted in multiple units.In Liters: 61.2 Liters
In cubic meter: 0.061163 m³
In cubic centimeter: 61,163.5 cm³
how many grams of KNO3 can be dissolved in 100g of water at 80c
Answer:
As temperature increases, its solubility increases as well. Notice, however, that it does not increase significantly. In fact, you can expect to be able to dissolve no more than 40 g of sodium chloride per 100 g of water at 80∘C
Explanation:
As temperature increases, its solubility increases as well. Notice, however, that it does not increase significantly. In fact, you can expect to be able to dissolve no more than 40 g of sodium chloride per 100 g of water at 80∘C
Name the following compound:
CH3 - CH₂ - CH₂ - CH₂ - OH
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here we go ~
There are 4 carbon atoms in the chain, so it's prefix should be " But " and there are only sigma bonds, therefore the primary suffix will be " ane ", and the functional group attached to the end is " OH " denoting alcohol group, so the secondary suffix will be " ol "
Hence, the name of the compound will be ~
[tex]\qquad \sf \dashrightarrow \:Butan - 1 - ol[/tex]
or simply
[tex]\qquad \sf \dashrightarrow \: Butan ol[/tex]
Which of the following reactions would you find in a radioisotope thermal generator?
What is the density (g/L) of 5.0 moles of NH3, at 1.18 atm and 25.0°C?
Answer:
.821 g/L
Explanation:
It does not matter what the gas is, just the number of moles to calculate volume....
Ideal Gas Law :
PV = n R T R = gas constant = .082057 L-atm/(mol-K) & T in Kelvin units
(1.18)(V) = 5 * .082057 * (25 + 273.15)
V = 103.67 Liters
NOW ...to calculate density, the gas IS important...
mole weight of NH3 (from periodic table) = 17.031 gm/mole
Density = mass / volume = (5 * 17.031) / 103.67 L = .821 gm/L
Calcium is an element with several naturally-occurring isotopes.
(i) What is the meaning of the term element ?
Answer:
Element are substances made up of the same kind of atoms
Use the drop-down menus to classify each of the following compounds.
HR: H
HH
H-C-C-O-C-C-H
H-C-C-
-C-C-H
A
H
RETRY
>
-H
>
HH Br
H-C-C-C-H
Answer:
ester, ether, haloalkane
Explanation:
EDG.2022
A/an _______ is the smallest unit of matter that has the characteristics of a chemical element. Question 9 options: A) proton B) atom C) molecule D) electron
Answer: atom
Explanation: molecule is a group or two or more atoms
protons and electron are subatomic particles
atom is the smallest unit of matter
A helium balloon in a closed car occupies a volume of 2.32 L at 40.0oC. How many moles of helium would exert 5 atm of pressure at the ideal conditions above?
Answer:
.451 mole
Explanation:
PV = n RT R = gas constany = .082057 L-Atm/K-mol T is in units Kelvin
5 *2.32 = n (.082057)(40+273.15)
n=.451 mole
In the space below draw a model of the atoms that make up a water molecule to show the charges of each of these atoms chemistry
Answer:
I didn't draw this but I think they're asking you to draw this
Explanation:
Grilling food creates a chemical compound known as benzo-[a]-pyrene; high levels of this compound are linked to the development of cancer. Therefore, benzo-[a]-pyrene is a/an
Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon found in coal tar with the formula [tex]C_{20}H_{12}[/tex].
What is the meaning of Grilling food?Grilling involves cooking food on a rack over a heat source, usually a charcoal fire or ceramic briquettes heated by gas flames.
A chemical that comes from certain substances when they are not burned completely.
Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon found in coal tar with the formula [tex]C_{20}H_{12}[/tex].
The compound is one of the benzopyrenes, formed by a benzene ring fused to pyrene, and is the result of incomplete combustion at temperatures between 300 °C (572 °F) and 600 °C (1,112 °F).
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how many moles of O2 are needed to produce 3.95 moles of Fe2O3
Answer:
4Fe+3O2- 2Fe2O3
the ratio: 3:2
x:3.95
x=5.92 moles of O2
If 100.0g of nitrogen is reacted with 100.0g of hydrogen, what is the excess reactant? What is the limiting reactant? Show your work.
Kiera and Grace are sisters. They both have blue eyes. Kiera is extremely short for her age and Grace is exceptionally tall for her age. Develop a hypothesis as to why the sisters have different statures. Justify your hypothesis in two or more complete sentences.
The hypothesis as to why the sisters have different statures occurs because from genetics we know that it is linked to the alleles so one sister is shorter than the other one was they had different alleles.
What is the genetic similarity between siblings?On average, siblings share about 50% of their DNA with each other, but some siblings share even more and some less. So while we all have approximately 50% DNA from each parent, the segments we end up getting are completely random.
Hereditary character or gene that is manifested by the absence of the opposite gene, called dominant, in this case, Kiera is extremely short for her age.
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what is 750 grams of phosphorus
Answer:
750 g of phosphorus is 750 g of phosphorus
What substance(s) do you predict will be able to diffuse through the cell membrane and why?
Consider substances that can easily diffuse through the lipid bilayer of the cell membrane, such as the gases oxygen (O2) and carbon dioxide (CO2). These small, fat soluble gasses and other small lipid soluble molecules can dissolve in the membrane and enter or exit the cell following their concentration gradient.
I answered all of the previous questions, but I'm not sure I understand questions 4 and 5, so I'm hoping you can assist me.
