Answer:
0.324 mol
Explanation:
Mass of one mole or atomic mass of potassium is 39 g. Thus, number of moles in 12.65 g of potassium is 0.32 moles.
What is atomic mass?Atomic mass of an element is the mass of one mole of that element. One mole of an element contains 6.022 × 10²³ atoms. This number is called Avogadro number.
Potassium is 19th element n periodic table. It is an alkali metal in the first group. The atomic mass of potassium is 39 g/mol. This is the mass of one mole of potassium. The chemical symbol of potassium is K.
Given mass of potassium = 12.65 g
atomic mass = 39 g/mol
number of moles in 12.65 g = mass/ atomic mass
no.of moles = 12.65 /39 = 0.32 moles.
Therefore, the number of moles of 12.65 g of potassium is 0.32 moles.
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What cloud does cirrus and cumulus make???
Answer:
They're sometimes called 'mackerel skies' because they can sometimes have a grayish color which makes the clouds look a bit like fish scales. Cirrocumulus clouds exhibit features from both cumulus and cirrus clouds but should not be confused with altocumulus clouds.Explanation:
When solving mass to mass stoichiometry problems, where do you get the molar ratio for the first and second chemicals?
In the mole ratio. If you have moles of one substance. And the coefficients from the balanced equation you can use the ratio to figure out the moles of the other compounds.
A una sustancia que tenia una etiqueta poco legible se le determina de iones de 3.16x10 a la -10 M.Calcula su pH determina si se trata de jugo de naranja o leche magneisa
Answer:
pH = 9.44, leche de magnesia
Explanation:
Número de iones [H⁺] de 3.6x10⁻¹⁰M
El pH es una medida en química utilizada para determinar si una sustancia es ácida o básica.
Si el pH < 7 La sustancia será ácida (Jugo de Naranja)
Si el pH > 10 La sustancia será básica (Leche de Magnesia)
Ahora, el pH es definido como el -log[H⁺], el pH de la solución será:
pH = -log[3.6x10⁻¹⁰M]
pH = 9.44Como el pH > 7, probablemente se trate de leche de magnesia
There
are
approximately
317,000,000
people
in
the
U.S.,
and
the
area
of
the
U.S.
is
about
4,000,000
square
miles.
If
the
people
were
spread
out
evenly,
about
how
many
people
are
there
per
square
Answer:
yesddgfhzxhcvnjxkcncjzdkccchjjbxbxbbk
Which flows through the other?
Which term describes the molecule shown below?
H-C=C-H
ethyne CxHy
A. Unsaturated alkene
B. Unsaturated alkyne
O C. Saturated alkyne
O D. Saturated alkene
Answer:
Saturated alkyne
Explanation:
The hydrocarbons are known as the compounds which is made up of only carbon and hydrogen atoms. They may be saturated or unsaturated based on the number of bonds present. The molecule H-C≡C-H is an Unsaturated alkyne. The correct option is B.
The hydrocarbons in which the carbon and hydrogen atoms are connected through double or triple bonds are known as unsaturated hydrocarbons. Here ethyne is an unsaturated hydrocarbon.
Ethyne is an alkyne which have the C-C and C-H atoms connected through triple and single bonds.
Thus ethyne is option B.
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How many chlorine atoms are there in 100 g of carbon tetrachloride
Answer:
1.566x10²⁴ atoms of Cl
Explanation:
In Carbon tetrachloride, CCl₄, you have 4 moles of Cl per mole of CCl₄. To solve this question we must find the moles of CCl₄ in order to find the moles of Cl. Using Avogadro's number we can solve the chlorine atoms:
Moles CCl₄: 153.82g/mol
100g * (1mol / 153.82g) = 0.65 moles CCl₄
Moles Cl:
0.65 moles CCl₄ * (4 moles Cl / 1mol CCl₄) = 2.6 moles Cl
Atoms Cl:
2.6 moles Cl * (6.022x10²³ atoms / mol) =
1.566x10²⁴ atoms of ClHow many moles of H2 can be made from the complete reaction of 1.5 moles of Al? Given: 2 Al + 6 HCl → 2 AlCl3. + 3 H2
Answer:
2.25 mol H₂
Explanation:
To calculate mol of H₂ ensure that the equation is balanced. Then use the equation and dimensional analysis to convert the given 1.5 mol Al to mol of H₂.
what is the order in which types of elements are found as you move from left to right across a period? metals, nonmetals, and metalloids?
Answer:
metals, metalloids, nonmetals
Explanation:
a p e x, just took the quiz
The order is metals, metalloids, non metals in which elements are found as you move from left to right across a period.
MetalsWhen we move from left to right across a period Metals are located on the left hand side of the periodic table. Metals have high thermal conductivity.
MetalloidsWhen we move from left to right across a period Metalloids are located between metals and nonmetals. Metalloids are present p-block elements. Metalloids have good thermal conductivity.
NonmetalsWhen we move from left to right across a period Nonmetals are located on the right hand side of the periodic table. Non metals have low melting point and boiling point. Non metals have low thermal conductivity.
Thus, from conclusion we can say that the order is metals, metalloids, non metals in which elements are found as you move from left to right across a period.
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How would these organisms be arranged in a food chain, beginning with the producers?
Drag and drop each organism into the order they would be arranged in a food chain, with the producers at the top.
help me pls this due today
Answer:
grass, grasshopper, frog, snake, hawk
Explanation:
what is rasching process only chemical reaction
Answer:
The Raschig process, the original commercial production process for hydrazine, involves oxidation of ammonia to chloramine with sodium hypochlorite, then further reaction of the chloramine with excess ammonia and sodium hydroxide to produce an aqueous solution of hydrazine with sodium chloride as a by-product.
Answer: The Rasching process is a chemical process for the producing phenol
Explanation:
The fictional element “Nt” contains atoms with two valence electrons. Which type of intermolecular force is most likely responsible for the properties of NtF2?
O dipole-dipole forces
O ion-ion forces
O hydrogen bonding
O dispersion forces
Which of the following radiations is attracted to the positive electrode?
a.Alpha and beta particle
b.Alpha particle and neutron
c.Photon
d.Beta particle
How many moles are there in 2.35x10^23 molecules of water
Answer:
0.39017 moles
Explanation:
a mole is 6.023×10^23
(2.35×10^23)÷(6.023×10^23)=0.39017
How many moles are in 46.7g of H2O gas?
Where are Gold, Limestone and kaiolin found.
If you want to change the mass of your atom by 1 or more mass units, you can ether
(2 RIGHT CHOICES)
add a proton
add a neutron
add an electron
If you want to change the mass of your atom by 1 or more mass units, you can either? Add a proton and Add a neutron.
Explanation:
Option A and Option B is your answers.
To change the mass of your atom by more mass units ; you can add a proton or add a neutron ( A and B )
The nucleus of an atom is composed of a neutron and a proton while the outer shell of an atom comprises of the electrons.
The mass of an atom is dependent on the mass of the nucleus of the atom therefore to increase the mass of the atom by any number of mass units you can either add a proton or a neutron to the nucleus of the cell.
Hence we can conclude that to change the mass of your atom you can add a proton or add a neutron to the nucleus of the atom
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The shape of the directly sunlit portion of the Moon as viewed from
Earth
your answer:
lunar phases
What is the chemical formula for this?
Answer:
-OOH
Explanation:
This forms an acid if it comes in contact with a metal
Answer:
HO2; Hydroperoxyl
Explanation:
Since there are two oxygen molecules, and one hydrogen molecule, it can be classified as a hydroperoxyl molecule.
It is an inorganic compound with the following characteristics
Covalent compound (O,H are nonmetals) Valence of O (O must form an octet): 6 Valence of H: 1 Total valence electrons: 13 Molar mass: 33.01 g/molHELP HELP HELP !!!!!!!!!!!!!!
Answer:
approximately 83.33
Explanation:
The formula for the area of a right square pyramid is:
V= a^2(h/3)
a= base edge
h= height
The height is 10 inches, and the base edge is 5 inches. Plug it in to the formula:
V= 5^2 (10/3)
V= 25 (10/3)
V= 83.33 in^3
An alpha particle is identical to a:
helium nucleus
hydrogen nucleus
high energy electron
radium nucleus
Answer: helium nucleus
Which molecule is butyne?
H,C CH,
ОА. С=С
н Н
В.
н нннн
| | | | |
Ос. Н-с-с-с-с-с-н
1 І
Н Н Hн Н
Hн
| |
OD. н-c=C-с-с-н
ТІ
Hн
Answer:
H,C CH,
Explanation:
moreee help science plsssssssssssssssss helpp
I’m really confused can someone help me?
Answer:
the second energy level can hold a maximum of eight electrons
How many moles of ammonia are produced due to the reaction with two moles of nitrogen?
Answer:
17.03052 mutiple by 2
34.06104grams
For her science project, Suzanne made an animal cell using a rectangular
shoe box, pipe cleaners, and construction paper. One comment that the
teacher made was that Suzanne should not have used a shoe box. Why did
the teacher make this comment? *
Answer:
Animal cells are more round and do not have a rigid cell wall.
Explanation:
A sports car requires 10 kg of 93 octane to fill the tank. How many grams of octane are in the tank when it is full?
Answer:
There are 10,000 grams of octane in the tank of the sports car when it is full
Explanation:
To solve this problem, we simply need to convert the mass of octane- 93 from kilograms to grams, using the standard conversion factor which is given below.
it will take 10kg of octane-93 to fill up the tank
1 kg = 1000grammes
therefore 10 kg = 10 X 1000 = 10,000 grams.
Hence, there are 10,000 grams of octane in the tank of the sports car when it is full.
I got c, just wondering was it right?
Answer:
Yes you are right.
Explanation:
Answer:
yeah it´s right
Explanation:
How can you Weigh more on the earth than you would on the moon and still have the same mass in both places.
Answer:
Your Mass never changes but your weight can..
Explanation: This all depends on gravity..
Answer:
its because of gravity your mass doesn't change but the gravity does and the gravity from earth and on the moon is way different.please choose me as brainliestPlease help!! The answer that shows work and does not send link will get brainiest!
Answer:
5 mol H₂. this is the answer bro all the best for your test/exam