Answer: m = nM= 242.8 g
Explanation: amount of MgCl2 is same as n(Mg)
M(MgCl2) = 95.21 g/mol
95.21 g/mol is the mass in grams of MgCl[tex]_2[/tex] are produced by 2.55 mol Mg in the reaction Mg + 2HCl ⟶ MgCl[tex]_2[/tex] + H[tex]_2[/tex].
What is mass?A body's mass is an inherent quality. Prior to the discoveries of the concept of atom as well as particle physics, it was widely considered to be tied to the amount of matter inside a physical body. It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses.
There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to accelerate (change of velocity) in the presence of a net force can be measured experimentally as mass. The gravitational pull an object has on other bodies is also influenced by its mass.
m = n×M= 242.8 g
M(MgCl[tex]_2[/tex]) = 95.21 g/mol
Therefore, 95.21 g/mol is the mass in grams of MgCl[tex]_2[/tex] are produced by 2.55 mol Mg in the reaction Mg + 2HCl ⟶ MgCl[tex]_2[/tex] + H[tex]_2[/tex].
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Explain how an aqueous acidic solution differs from an aqueous basic solution according to the Arrhenius theory for acids and bases
Answer:
An Arrhenius acid is a substance that associates in water to form hydrogen irons (H+) In other words an acid increases the concentration of H+ ions in an aqueous solution
Plants are living organisms that respond to stimuli, use resources for energy, grow and develop, are organized by cells, and reproduce. A. true B. false
Answer:
true
Explanation:
Answer:
b. trueeeeeeeeeeeeeeeeeeeeeeeeeeee
pleaseeeeeeeeeee someone help urgent we are writing a test tmr can some one please explain subatomic particles to me...
Answer:
n physical sciences, subatomic particles are smaller than atoms. They can be composite particles, such as the neutron and proton; or elementary particles, which according to the standard model are not made of other particles. Particle physics and nuclear physics study these particles and how they interact.
Explanation:
a particle smaller than an atom (e.g., a neutron) or a cluster of such particles (e.g., an alpha particle).
Describe the region(s) of the Atlantic Oceans where dense waters will likely sink/
Answer:
The densest ocean water is formed in two primary locations near the poles, where the water is very cold and highly saline as a result of ice formation. The densest deep water mass is formed in the Weddell Sea of Antarctica, and becomes the Antarctic Bottom Water (AABW).
Explanation:
The densest ocean water is formed in two primary locations near the poles, where the water is very cold and highly saline as a result of ice formation. The densest deep water mass is formed in the Weddell Sea of Antarctica, and becomes the Antarctic Bottom Water (AABW).
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, north Atlantic Ocean is the region of Atlantic Oceans where dense waters will likely sink.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density = Mass of the metal ball ÷volume marked on the graduated cylinder
North Atlantic Ocean is the region of Atlantic Oceans where dense waters will likely sink. Here, water is very cold and salty which makes the water denser.
Therefore, north Atlantic Ocean is the region of Atlantic Oceans where dense waters will likely sink.
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heeeeeeeeeeeeeeeeeeeeeeeeeeeeeelp
Which organism is at the base of a marine food web?
A. Crab
B. Phytoplankton
C. Whale
D. Zooplankton
how minimising the use of cars can help save the ozone layer
Answer:
minimizing the use of cars can help save the ozone layer by Minimizing the amount of gasoline which damages the ozone layer.
therefore the ozone layer is preserved.
have a nice day.
1. How many liters of a 0.50 M solution are needed to give 3.5 moles of solute?
Answer:
The volume of solution in liters required to make a 0.250 M solution from 3.52 moles of solute is 14.08 liters of solution
Explanation:
The question relates to the definition of the concentration of a solution which is the number of moles per liter (1 liter = 1 dm³) of solution
Therefore we have;
The concentration of the intended solution = 0.250 M
Therefore, the number of moles per liter of the required resolution = 0.250 moles
Therefore, the concentration of the required solution = 0.250 moles/liter
The volume in liters of the required solution that will have 3.52 moles of the solute is given as follows;
The required volume of solution = The number of moles of the solute/(The concentration of the solution)
∴ The required volume of solution = 3.52 moles/(0.250 moles/liter) = 14.08 liters
The required volume of solution to make a 0.250 M solution from 3.52 moles of solute = 14.08 liters.
Therefore the number of liters required to make a 0.250 M solution from 3.52 moles of solute = 14.08 liters.
what is the function of a prism
Answer:
Prisms are sometimes used for the internal reflection at the surfaces rather than for dispersion. If light inside the prism hits one of the surfaces at a sufficiently steep angle, total internal reflection occurs and all of the light is reflected.
Explanation:
Prism, in optics, piece of glass or other transparent material cut with precise angles and plane faces, useful for analyzing and reflecting light. An ordinary triangular prism can separate white light into its constituent colours, called a spectrum.
What is the diameter of Neptune in standard notation and scientific notion?
Answer:
Standard notation: 49,244 km
Scientific notation: 4.92x10⁴ km
Explanation:
The diameter of Neptune in standard notation is:
49,244 km
In the standard notation, we write the result in a normal way.
Now, to express the diameter in scientific notation we need to use a base ten power as follows:
4.92x10⁴ km
In the above result, the positive exponent indicates that the number is larger. The decimal point is located near the first digit.
Therefore, the diameter of Neptune in standard notation is 49,244 km and in scientific notation is 4.92x10⁴ km.
I hope it helps you!
When dissolved in water, all aclds will
Answer:
when dissolved in water they dissociate in anion and H+ cation.
Explanation:
When dissolved in water, acids donate hydrogen ions (H+). Hydrogen ions are hydrogen atoms that have lost an electron and now have just a proton, giving them a positive electrical charge. Bases, on the other hand, mixed with water yield hydroxide ions (OH-).
When a substance freezes, _____.
it releases thermal energy
it absorbs thermal energy
it changes from a solid to a liquid
its temperature drops
Answer:
It's temperature drops, and if releases thermal energy
Answer:
Its temperature drops
6) Which type of orbital is represented by this image?"
Z,Y,X
Answer:
the immage is not uploaded
Calculate the pH during the titration of 20.00 mL of 0.1000 M HNO2(aq) with 0.1000 M KOH(aq) after 13.27 mL of the base have been added. Ka of nitrous acid = 7.1 x 10-4.
Answer:
pH = 2.462.
Explanation:
Hello there!
In this case, according to the reaction between nitrous acid and potassium hydroxide:
[tex]HNO_2+KOH\rightarrow KNO_2+H_2O[/tex]
It is possible to compute the moles of each reactant given their concentrations and volumes:
[tex]n_{HNO_2}=0.02000L*0.1000mol/L=2.000x10^{-3}mol\\\\n_{KOH}=0.1000mol/L*0.01327L=1.327x10^{-3}mol[/tex]
Thus, the resulting moles of nitrous acid after the reaction are:
[tex]n_{HNO_2}=2.000x10^{-3}mol-1.327x10^{-3}mol=6.73x10^{-4}mol[/tex]
So the resulting concentration considering the final volume (20.00mL+13.27mL) is:
[tex][HNO_2]=\frac{6.73x10^{-4}mol}{0.01327L+0.02000L} =0.02023M[/tex]
In such a way, we can write the ionization of this weak acid to obtain:
[tex]HNO_2+H_2O\rightleftharpoons NO_2^-+H_3O^+[/tex]
So we can set up its equilibrium expression to obtain x as the concentration of H3O+:
[tex]Ka=\frac{[NO_2^-][H_3O^+]}{[HNO_2]}\\\\7.1x10^{-4}=\frac{x^2}{0.02023M-x}[/tex]
Next, by solving for the two roots of x, we get:
[tex]x_1=-0.004161M\\\\x_2=0.003451M[/tex]
Whereas the correct value is 0.003451 M. Finally, we compute the resulting pH:
[tex]pH=-log(0.003451)\\\\pH=2.462[/tex]
Best regards!
Does a reaction occur when aqueous solutions of sodium sulfide and manganese(II) chloride are combined?
Oyes Ono
If a reaction does occur, write the net ionic equation.
Answer:
Yes, a reaction occurs
Explanation:
net ionic equation
Mn 2+ (aq) + S 2- (aq) --> MnS (s)
SOMEBODY HELP ME THIS IS MY THRID EVER QUESTION AND I NEED YOUR AMAZING HELP PLEASE PLEASE HELP ME FREINDS
Why does the earth experience high tides?
Lesson 3.01
Question 2 options:
High tides occur because Jupiter is in alignment with Saturn
This causes areas of water that bulge away from the earth.
The earth experiences high tides because the gravitational force of the moon attracts the water and solid earth, pulling them closer to the moon
High tides occur because the comet Neowise passed by Earth
Spring Tides: Choose ALL that apply
Lesson 3.01
Question 3 options:
Moon, Sun, and Earth are aligned
Highest of the high tides and lowest of the low tides.
Occurs twice a month
Moon, Sun, and Earth are perpendicular
Question 4 (1 point)
Choose ALL that apply for neap tides
Lesson 3.01
Question 4 options:
Moon, Sun, and Earth are in alignment
Smaller than normal range of high and low tides.
Gravity of the Sun and Moon work against each other
Moon and Sun are at right angles to the Earth
Question 5 (1 point)
What is the difference between rotation and revolution?
Lesson 3.03
Question 5 options:
Revolution is when an object travels in a path around another.
Rotation is when an object travels in a path around another.
Revolution is when an object spins around its axis.
Rotation is when an object spins around its axis.
Question 6 (1 point)
What is the shape of the planet's revolutions?
Lesson 3.03
Question 6 options:
It is a circle
It is an oval
It is elliptical
It is a sqare
Question 7 (1 point)
How long does it take for the Earth to make ONE revolution around the Sun? How long does it take for Earth to rotate?
Lesson 3.03
Question 7 options:
It takes a day. It takes a year
It takes a week. It takes a day.
It takes a year. It takes a day
It takes a day. It takes a week
Question 8 (1 point)
Earth's revolution causes day and night.
Lesson 3.03
Question 8 options:
True
False
Question 9 (1 point)
Why is it warmer in the summer?
Lesson 3.04
Question 9 options:
The earth's axis does not have a tilt
The rotation of Earth
The tilt of the earth's axis away from the sun allows those parts of the earth to have more sunlight.
The tilt of the earth's axis towards the sun allows those parts of the earth to have more sunlight.
Question 10 (1 point)
The seasons are caused by the tilt of Earth's axis
Lesson 3.04
Question 10 options:
True
False
Answer:
Answer 4. C and D also known as "Gravity of the Sun and Moon work against each other "
"Moon and Sun are at right angles to the Earth"
Answer 5. A and D also known as "Revolution is when an object travels in a path around another." "Rotation is when an object spins around its axis"
Answer 6. It is elliptical
Answer 7. It takes a year. It takes a day
Answer 8. False
Answer 9. The tilt of the earth's axis towards the sun allows those parts of the earth to have more sunlight.
Answer 10. True
If magnesium and nickel were used as electrodes to construct an electrochemical cell like the one shown at right, which metal would form the anode and which the cathode?
anode:
cathode:
Answer:
anode: magnesium
cathode: nickel
Explanation:
edg. 2021
this is the work
I'm rlly confused what should I write?
Answer:
Q 1: Why did the man get sick but not his children? Why did he use a cube?
Q 2: By knowing how he heated the water and everything we can infer what happened to him and not his children.
Explanation:
Hope this helps! plz mark brainliest <3
Answer:
Ill just comment this for fun So he can get brainliest since u need 2 comments for that
How do I do nunber 8?
Answer:
DONT CLICK THAT LINK THAT IS HACK AND VIRUS
Explanation:
Chemical equation=CH4 + O2 = CO2 + H2O.
i. identify the products of the chemical reaction.
ii. explain why these are the products based on trends in the periodic table (the number of
valence electrons, electronegativity, etc.).
iii. identify the types of bonds in the reactants and products.
iv. identify the number of each type of bond in the reactants and products.
v. identify the type of reaction
Answer:
1.The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.The combustion of methane or octane is exothermic; it releases energy. CH4 + 2 O2 → CO2 + 2 H2O + energy The energies of the products are lower than the energiies of the reactants.
Explanation:
How many atoms in 12 moles of Mg?
helpppppppppppppp!!!!!!!!!!!!!how did chlorine atom attain saturation in potassium chloride and oxygen dichloride
I need help with this question
Answer:
there is no question posted
For which of the reactions listed below will Gibbs free energy always be.
positive?
O A. An exothermic reaction that decreases in entropy
B. An exothermic reaction that increases in entropy
O C. An endothermic reaction that decreases in entropy
D. An endothermic reaction that increases in entropy
I think the answer is: C. An endothermic reaction that decreases in entropy
An endothermic reaction that decreases in entropy. Hence, option C is correct.
What is entropy?Entropy is the energy of a system that is unuseful to do work.
For a reaction to be spontaneous, the Gibbs' Free Energy must be negative.
The equation for Gibbs Free energy is given by:
G= H-TS
Where, G = Gibbs free energy
H = Enthalpy of the reaction
T = Temperature of the system
S = Entropy of the system
Sign convention for all the quantities:
For H: It is negative for exothermic reactions and positive for endothermic reactions
For S: It is positive when there is an increase in entropy and it is negative when there is a decrease in entropy.
If we want G to be negative, the conditions necessary are:
G= (-ve) - (+ve) = -ve
The product of temperature and entropy must be positive and that will be positive when there is increase in entropy at any temperature.
Hence, option C is correct.
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Which is true regarding the density of air?
in general how are natural resources and population size related
Answer:
The magnitude of the threat to the ecosystem is linked to human population size and resource use per person. Resource use, waste production and environmental degradation are accelerated by population growth.
1. All societies base their calendars and timekeeping systems on the
apparent motion of the Sun and Moon.
Can someone help please
Answer:
fuse
Explanation:
fuses are made by metal alloys , have low melting point
How does moving water help shape earth?
Answer:
Moving water helps plant's and islands form and grow. Which shapes earth.
can someone help me ????
Answer:
B) Lithium
C) Barium
F) Potassium
Explanation:
All of the above are Inorganic Compounds.
Answer:
[tex]\boxed {\boxed {\sf Cobalt, Iron, and \ Copper}}[/tex]
Explanation:
The Stock System states that In a chemical formula or equation, some metals need a roman numeral after their symbol. If a metal has multiple oxidation states, it needs a roman numeral.
Use the Periodic Table to see the oxidation states for each metal.
Cobalt (Co): +3, +2 Lithium (Li): +1 Barium (Ba): +2 Iron (Fe): +3, +2 Copper (Cu): +2, +1 Potassium (K): +1We can see that cobalt, iron, and copper have more than one oxidation state, so they would require a roman numeral.