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Protons are a subatomic particle. Which description below accurately describes a proton's charge, location, and mass?
a) A proton is in the nucleus, has no charge, and atomic mass of 1 amu.
b) A proton is outside the nucleus, has a negative charge, and is so small it doesn't contribute to the mass.
c) A proton is in the nucleus, has a positive charge, and an atomic mass of 1 amu.
d) A proton is outside the nucleus, has a positive charge, and is so small it doesn't contribute to the mass.
Answer: C) a proton is in the nucleus, has a positive charge, and an atomic mass of 1 amu.
Explanation:
Protons are positive so they give a positive charge, they are also never outside of the nucleus. Only electrons are outside the nucleus.
Arrange these Alkaline Earth metals from lowest to highest electronegativity: Ca, Be, Ba, Sr
Ca is -2
Be is stabilized
Ba is -4
Sr is -3
so it would be => Ba, Sr, Ca, Be
have a wonderful day! :)
The arrangement of the alkaline earth metals from the lowest to highest electronegativity is; Ba< Sr< Ca<Be
Electronegativity refers to the ability of the atoms of an element in a compound to attract the shared electrons of that bond towards itself. It is a property that decreases down the group but increases across the period.
Electronegativity increases across the period as atoms of elements become smaller in size and decreases down the group because of increase in distance between the valence electrons and nucleus.
Since electronegativity decreases down the group, the order of electronegativity from lowest to highest is; Ba< Sr< Ca<Be
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How many grams of oxygen are produced when 3.0 moles of potassium chlorate decompose completely?
The mass of oxygen produced when 3.0 moles of potassium chlorate decomposed completely is 144 g
Equation for the reactionWe'll begin by writing the balanced equation for the reaction. This is given below:
2KClO₃ —> 2KCl + 3O₂
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 3 moles of O₂.
How to determine the number of mole of oxygen produced.From the balanced equation above,
2 moles of KClO₃ decomposed to produce 3 moles of O₂.
Therefore,
3 moles of KClO₃ will decompose to produce = (3 × 3) / 2 = 4.5 moles of O₂.
How to determine the mass of oxygen produced Molar mass of O₂ = 2 × 16 = 32 g/mol Mole of O₂ = 4.5 moles Mass of O₂ =?
Mass = mole × molar mass
Mass of O₂ = 4.5 × 32
Mass of O₂ = 144 g
Learn more about stoichiometry:
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Difference girteen tungsten and nichrome
Answer:Tungsten is made of tungsten while Nichrome is made of nickel chromium. ... Tungsten is used to make filament of bulbs. Nichrome have high resistivity than tungsten.
Explanation:i hope u have a wonderful night and stay safe
5.Explain how to convert the mass of a substance into mole
Answer:
............................................
What happens to electrons in an ionic bond?
Answer:
the metal loses electrons to become a positively charged cation
Explanation:
When a coil of wire is connected to a battery, an electric current flows through it.
True
false
Two or more substances combined but not chemically, are called what?
Answer:
a mixture
Explanation:
Two or more substances combined chemically, are called a compound
I need help someone plz
Answer:It has 8grams of hydrgen
Explanation:
how many moles of MgO can be made from 10 moles of fe2O3?
Answer:
Fe 2 O3 .
Explanation:
why the iron nail not rusted on a chemical to absorb water vapour
Answer:
Thus there was no accumulation of ions on the nails, as the dissolved gases were already removed, hence no rust formation. In test tube C, a chemical was added to absorb the water vapour. We know that rust formation takes place when a metal is exposed to water vapour.
Explanation:i hope u have a wonderful night and stays safe
HELP PLEASE || TEN PTS WILL MARK BRAINLEST ||Reaction B could produce a substance with a pH of...
Group of answer choices
4.
14.
10.
7.
Answer:
the answer is 4
Explanation:
i took the test and got it right and i would recommend using quizlet it has these flash cards and the answers are there you just click on the one that says your question and it will say your answer on the back. It helps with most of my test! Hope this helps (:
HELP!!!
write one paragraph describing atomic theory. It is important that you are using science terminology and are accurate.
Answer:
"Atomic theory established that all matter is made of tiny particles, a discovery that led to amazing scientific breakthroughs in areas from modern chemistry to nuclear energy.
Explanation:
Answer:
correct
Explanation:
Which organelle in cytoplasm is responsible for carrying hereditary information?
Answer:
Nucleus
Explanation:
The nucleus serves as the cells command center, sending direction to the cell to grow, mature, divide, or die
What is the relationship between melting/boiling point and intermolecular forces
When polluted water runs off into rivers and groundwater, it reduces the amount
of
available for sustaining life.
Answer:
Sewage pollutes our waters with pathogens, excess nutrients, heavy metals, and other toxins. It kills aquatic life and creates algal blooms that can suffocate fisheries. Sewage carries pathogens that can end up in our drinking water supplies and swimming areas.
Missing:
Explanation:
Need quick! Please help rn! THANK YOU!
Answer:
B. Unbalanced force
Explanation:
Answer:
I think its unbalanced force
Explanation:
crazy what a quick go.ogle search can do! :)
which basic postulates of Dalton's atomic theory are modified by the modern atomic theory
Answer:
Dalton's atomic theory has been modified as
Explanation:
Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes
Answer:
On the basis of new experimental facts, Dalton's atomic theory has been modified as: ... Atoms of same element may not have same atomic mass. For example, some atoms of chlorine have atomic mass 35 amu while others have atomic mass 37 amu. Such atoms of same element having different atomic masses are called isotopes.
Explanation:
Plz mark brainliest thanks
Consider the reaction Mg₂Si(s) + 4 H₂O(ℓ) → 2 Mg(OH)₂(aq) + SiH₄(g). How many grams of silane gas (SiH₄) are formed if 25.0 g of Mg₂Si reacts with excess H₂O?
Answer:
10.60 grams of silane gas are formed.
Explanation:
From the reaction:
Mg₂Si(s) + 4H₂O(l) → 2Mg(OH)₂(aq) + SiH₄(g)
We know that the limiting reactant is Mg₂Si, so to find the mass of SiH₄ formed we need to calculate the number of moles of Mg₂Si:
[tex]\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}}[/tex]
Where:
m: is the mass of Mg₂Si = 25.0 g
M: is the molar mass of Mg₂Si = 76.69 g/mol
[tex]\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}} = \frac{25.0 g}{76.69 g/mol} = 0.33 moles[/tex]
Now, the stoichiometric relation between Mg₂Si and SiH₄ is 1:1 so:
[tex] \eta_{Mg_{2}Si} = \eta_{SiH_{4}} = 0.33 moles [/tex]
Finally, the mass of SiH₄ is:
[tex] m_{SiH_{4}} = \eta_{SiH_{4}}*M_{SiH_{4}} = 0.33 moles*32.12 g/mol = 10.60 g [/tex]
Therefore, 10.60 grams of silane gas are formed.
I hope it helps you!
(HELP ASAP) what is the reaction for Si + S₈ --> Si₂S₄
Answer:
Synthesis reaction~~~~~~~
Explanation:
How many grams are in 1.3 moles of Cr?
Answer:
40.38 grams
Explanation:
NEED HELP!!! pls help mee :)
What are chemical formulaes?
give your own response!!
Answer:
is a way of presenting information about the chemical proportions of atoms
Explanation:
Which is the most important part of the food web? Producers, decomposers, carnivores, or herbivores
Answer:
All parts of the food chain are very important for if one is part of the food chain is tooken away than other parts of the food chain will be affected.
Explanation:
Answer:
all is important
Explanation:
Answer ASAP Homework
Answer:
1.98 ×10^2 g
Explanation:
follow the method in the above image
What is the molarity of NaOH if 300.mL of
5.00M HCl is titrated with 200.mL of NaOH?
How do movement of rocks cause earthquakes?
Answer:
Well its actually the movement of tectonic plates under the earths surface that when the slide along each other, pull away from each other, or push up against each other they create earth quakes.
Explanation: yes.
Which diagram shows two waves with different amplitudes and the same wavelengths?
Answer: a
Explanation:
im big brain
The diagram that shows two (2) waveforms with different amplitudes but the same wavelengths is: Diagram A.
A wave can be defined as a disturbance that is created in a medium, which progressively transports energy from a source to another location without the transportation of matter. Some of the parameters that are associated with a waveform include the following:
SpeedCrestFrequencyWavelengthAmplitudeAmplitude refers to the maximum displacement of a wave when measured from its equilibrium position.
In the attached diagram, the amplitudes are 1 meter and 0.5 meter.Wavelength refers to the distance between two (2) successive crests (troughs) of a wave.
In the attached diagram, the wavelengths are 2 meters respectively.Note: Amplitude is measured vertically from an equilibrium position while wavelength is measured horizontally.
In conclusion, Diagram A shows two (2) waveforms with different amplitudes but the same wavelengths.
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Which of the following factors is the most in-
fluential in the formation of soil?
A volume of 20.0L of oxygen is warmed from -30.0C to SATP condition. What is the new volume if the pressure is kept constant