In 1 molecule of the compound C₆H₁₂O₂ there are 12 moles of hydrogen atoms
Further explanationGiven
C₆H₁₂O₂ compound
Required
moles of Hydrogen
Solution
In a compound, there is a mole ratio of the constituent elements.
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
In the C₆H₁₂O₂ compound, there are 3 forming elements: C, H and O
The number of each element is indicated by its subscript
C: 6 moles
H = 12 moles
O = 2 moles
What occurs when a molecule combines with oxygen and produces heat?
Answer:
It combusts
Explanation:
If an atom has 9 protons and 10 neutrons, how many electrons would it have if the atom is neutral?
Explanation:
it will have 9 electrons because atomic number is equals to number of protons and number of protons is equal to number of electrons in an atom
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U-238 which has a long half-life is also find the ages of geological formations (rocks). Meanwhile I-131, which has much shorter half-life, is used for diagnosing thyroid disorders. What is the mass of an original 5.6 gram sample of I-131 that is still radioactive after 16.042 days?
The mass after 16.042 days : 1.4 g
Further explanationGiven
mass of 5.6 gram sample of I-131
time=16.042 days
Required
The mass of a sample
Solution
General formulas used in decay:
[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}[/tex]
T = duration of decay
t 1/2 = half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
Half-life of I-131 = 8 days
Input the value :
[tex]\tt Nt=5.6.\dfrac{1}{2}^{16.042/8}\\\\Nt=\boxed{\bold{1.4~g}}}[/tex]
when chemical reactions require a substance called a catalyst. the main purpose of a catalyst is?
Answer:
Catalyst, in chemistry, any substance that increases the rate of a reaction without itself being consumed. Enzymes are naturally occurring catalysts responsible for many essential biochemical reactions.
Explanation:
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GOOD ANSWER = BRAINLIEST
Answer:
The answer is 10.8 g of lH2.
Explanation:
As per the equation, let us calculate the mole ratio.
N2+3H2→2NH3
As per the equation one mole of nitrogen reacts with 1 mol of hydrogen.
In terms of mass. 28.01 g of nitrogen needs 3 mol of hydrogen or 6.048 g of hydrogen.
We can set up the ratio:
28.01 g of lN2 needs 6.048 g of lH2
1 g of lN2 needs 6.048 / 28.01 g of lH2
50.0 g of lN2 needs 6.048×50.0 28.01 lg of lH2
=
10.8 g of lH2
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What is the name of this safety equipment?
Answer:
eye wash station
Explanation:
Can frozen ice transfer thermal energy to another substance? if so, how?
Answer:
Matter can change state when thermal energy is transferred into or out of the substance. Ice melts and liquid water boils as thermal energy is added. Water vapor condenses and liquid water freezes as thermal energy is removed.
A _________ mixture is not well mixed.
A.) Saturated
B.) Insoluble
C.) Homogeneous
D.) Heterogeneous
30)
A scientific theory is based on
A)
data collected over time.
B)
a general claim by scientist.
0
the best guess of a scientist.
D)
an idea that can only be proven true.
I think it’s (a)but, I’m not sure.
Answer:
D has to be based on facts so d would be the answer and idea that can only be proven true those are facts not hypothesis or guesses
Explanation:
based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world."
A runner can run at a speed of 4km/h in 2 hours. What distance will she
cover in that time? Remember to put the correct units too. *
Answer:
Distance cover = 8 km
Explanation:
Given:
Speed of runner = 4 km/h
Time taken = 2 hour
Find:
Distance cover
Computation:
Distance = Speed x Time
Distance cover = Speed of runner x Time taken
Distance cover = 4 x 2
Distance cover = 8 km
How many moles of H3PO4 would produce 12 moles of water in this reaction? ЗKOH + H3PO4 K3PO4 + 3H20
Answer:
4 moles of H₃PO₄
Explanation:
The reaction expression is given as;
3KOH + H₃PO₄ → K₃PO₄ + 3H₂O
Number of moles of water = 12moles
Unknown:
Number of moles of H₃PO₄ = ?
Solution:
From the balanced reaction expression we see that;
3 moles of water is produced from 1 mole of H₃PO₄
So; 12 moles of water would be produced from [tex]\frac{12}{3}[/tex] = 4 moles of H₃PO₄
Answer:4 moles of H₃PO₄
Explanation: did the test homie
Explain cathode rays and discovery of electron
Answer:
: cathode rays
a beam of electrons emitted from the cathode of a high-vacuum tube.
During the 1880s and '90s scientists searched cathode rays for the carrier of the electrical properties in matter. Their work culminated in the discovery by English physicist J.J. Thomson of the electron in 1897.
A particular power source releases kinetic energy that is used to move giant
magnets. These giant magnets are rotated to create electron flow. This
process describes which power source?
A. An electric generator
B. An electric motor
C. An electric reactor
D. Electromagnetism
Answer: an electric generator
Explanation:
The answer is A) An electric generator.
What is kinetic electricity in easy phrases?Kinetic power is the strength of the movement, observable as the motion of an item, particle, or set of debris. Any item in motion is using kinetic electricity: someone on foot, a thrown baseball, a crumb falling from a desk, and a charged particle in an electric field are all examples of kinetic power in paintings.
There are 3 subcategories of kinetic energy: vibrational, rotational, and translational. Vibrational kinetic strength is, unsurprisingly, a result of items vibrating. Rotational kinetic power is created with the aid of shifting items, while translational kinetic power is due to gadgets colliding with one another.
Something at domestic that moves are an instance of kinetic energy. this can be a cue ball rolling on a billiards table, a fan circulating air on a warm day, or glass shattering on the floor after it falls from the counter. electrical gadgets that are becoming on use kinetic energy as do humans transferring about the residence.
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Does water evaporates only from the sea
Why are models used to represent Atoms
Answer:
C
Explanation:
Different scientific models are used to represent an atom. It is because atoms are too small to see and to study their structure and electronic properties we need a model.
What are scientific models?Scientific models are visual representations or mathematical expression to make a scientific concept easy to understand. Atomic models are scientific models to represent the atomic structure and properties.
There are various theoretical models for atomic structure in which the latest one is Bohr's model. This model suggests that the electrons are revolving around the nucleus through circular paths of definite energies.
Subatomic particles, electrons, protons, and neutrons are microscopically small and we can't make its clear picture by reality. Therefore, using suitable experiments and assumptions scientists are proposing various theoretical models for atomic structure.
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What two conversion factors would you need in order to determine the number of moles of H 2O used to run the reaction?
Answer:
mol ratio and molar mass
Explanation:
What does a reaction energy diagram represent ?
A. The changes in concentrations with time
B. The changes in energy during reaction reaction
C. The changes in phases with temperature
D.The changes in the reaction rate with time
Answer:
B. changes in energy during the reaction
Explanation:
y-axis measures "energy" and x-axis measures "reaction progress". Those units fit well with (B) and not so well with concentration and time (A), phases and temperature (C), or reaction rate and time (D).
Answer:
b. changes in energy during reaction
Explanation:
graph
What kind of spectra was analyzed to determine atomic
numbers of elements?
Answer:
Optical Atomic Spectroscopy
Explanation:
...
The kind of spectra used to measure the atomic number of elements is X-ray spectra.
The atomic number of elements is the number of protons in the nucleus of the element. According to the modern periodic law, the properties of elements is a periodic function of their atomic numbers.
In 1913, Mosely demonstrated that the atomic number of elements can be obtained from the X-ray spectra of elements. Using this method, he arranged the elements in order of increasing atomic number.
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As rocks erode from Earth's surface, they are replaced by the process ____of
A. recrystallization
B. uplift
C. weathering
D. foliation
Answer:
B. uplift is answer
Explanation:
may be this is helpful!
which part of the human body is more complex your heart of the circulatory system
Compare and contrast carbon dioxide and water.
GRADEC
Evaluate these two sound waves and determine what property they have in common
A)
They have the same amplitudes.
B)
They have the same wavelengths.
c)
They make the same exact sound.
D)
They have crests in the same position
Answer:
it's-B.....................
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is
its density?
A. 1/3 g/cm3
O B. 3 g/cm3
C. 39 g/cm3
D. 27 g/cm3
Answer:
B. 3 g/cm³
Explanation:
Given data:
Mass of paper clip = 9 g
Volume of paper clip = 3 cm³
Density of paper clip = ?
Solution:
Formula:
d = m/v
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
by putting value,
d = 9 g / 3 cm³
d = 3 g/cm³
. A frog’s heart has ___________ chambers. Two atrium and _____ ventricle.
Answer:
A frog heart has three chambers.two atrium and one ventricle is answer
Explanation:
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tate whether the following changes are physical or chemical for rancidipication fixation of water 2 tearing of paper 3 rusting of iron 4 electrolysis of water
Answer: Physical change : tearing of paper, fixing of wtaer
Chemical change: rusting of iron , electrolysis of water, Rancidification
Explanation:
Physical change is a change in which there is no rearrangement of atoms and thus no new substance is formed. There is only change in physical state of the substance.
Example: tearing of paper, fixing of wtaer
Chemical change is a change in which there is rearrangement of atoms and thus new substance is formed. There may or may not be a change in physical state.
Example: rusting of iron , electrolysis of water, Rancidification
Which grouping lists the states of matter in order of increasing distance
between particles?
O1. gas, liquid, solid
O2. liquid, solid, gas
O3. solid, gas, liquid
O4. solid, liquid, gas
(PLZ HELP I GIVE BRAINLY!!!! 02.03 LC)
Which of these landforms is created due to deposition?
O Cirque
O Fjord
O Horn
O Sandbars
Answer: sandbars
Explanation:
Which of these is not produced when a fuel undergoes complete
combustion?
Carbon monoxide
Carbon dioxide
Water
Answer:
Carbon monoxide
As then Oxygen is available in sufficient amount
Explanation:
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the diagram below represents the organization levels of living things. Which of the following examples represents the missing organizational level?
Answer:
The heart
Explanation:
Answer:
The heart
Explanation:
Because its an organ and i got it right ;)
what does density have to do with atoms?
A: density describes how many atoms are in a substance
B:Density describes how closely the atoms of a substance are packed together
C: density describes how atoms float
Answer:
B
Explanation: Density by definition is the amount of matter per given volume.
