Answer:
Answer:
3 3 4
2 4
2 5
4
3 3 4
2 4
2 5
4
(( ) )) 143 /
( ) 98 /
( ) 108 /
( ) 474.8 /
484.25 (( ) ) 3.39
143
75.46 ( ) 0,77
98
270 ( ) 2,5
108
546 ( ) 1,15
474,8
m
M
M NH PO g mol
M H SO g mol
M N O g mol
M SnF g mol
NH PO mol
H SO mol
N O mol
SnF mol
According to the mole concept, there are 0.77 moles in 75.46 g of sulfuric acid.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Number of moles is calculated as, mass/molar mass=75.46/98=0.77 moles.
Thus, there are 0.77 moles in 75.46 g of sulfuric acid.
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A student is instructed to design a device that can allow one user to hear a voice of another surer a distance of 5 kilometers which statement describes the most applicable basic design concept
Answer:
A device designed to transmit electromagnetic waves through the air should be developed.
In order to meet the requirement a device is designed to transmit electromagnetic waves through the air should be developed.
What are electromagnetic waves?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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If 20g of fe react with 5l of chlorine gas at stp, how many grams of iron 3 chloride can be produced
Answer:
.........................................
Explanation:
In what type of reaction does one product break down to form 2 new products?
Answer:
decomposition reaction
If 0.25 moles of KBr is dissolved in 0.5 liters of
heavy water which has a mass of 1,100 grams
per liter, what is the concentration?
Answer in units of m (molal).
Answer:
[KBr] = 454.5 m
Explanation:
m is a sort of concentration that indicates the moles of solute which are contianed in 1kg of solvent.
In this case, the moles of solute are 0.25 moles.
Let's determine the mass of solvent in kg.
Density of heavy water, solvent, is 1.1 g/L and our volume is 0.5L.
1.1 g = mass of solvent / 0.5L, according to density.
mass of solvent = 0.5L . 1.1g/L = 0.55 g
We convert the mass to kg → 0.55 g . 1kg /1000g = 5.5×10⁻⁴ kg
m = mol/kg → 0.25 mol /5.5×10⁻⁴ kg = 454.5 m
In an experiment, how many variables should you change at a time? And why?
Answer:
it should test one variable at a time.
Explanation: because you will not be able to tell which variable is responsible for the observed results.
plsss help ive been stuck on this for a week
Answer:
Thomson's atom model.
Explanation:
His model is the plum pudding model of an atom. There are negatively charged subatomic particles or electrons placed within positively charged matter.
Hope this helps!
Why are stars special sources of light?(2 points)
They are made of gas.
O They twinkle in the night sky.
They get their light from the sun.
They give off their own light energy.
Answer:
They give off their own light energy
Explanation:
I'm taking astronomy and I answered this questions not too long ago
Chemistry help needed! (picture included)
Answer:
Use a fine, crystalline solute and stir vigorously
Explanation:
It is better if it is fine instead of coarse since this will provide more surface area. If there is more surface area, the crystals will dissolve faster.
You also have to stir the solution vigorously to keep all of the crystals exposed to the solvent.
Answer:
Use a fine, crystalline solute and stir vigorously
Explanation:
Hope this helps
PLEASE HELP ME ASAP!!!!!!!!!!!!!!!!!!
The two cells produced at the end of MITOSIS
are
Answer:
It produces two identical daughter cells
Explanation:
1 haploid splits into 2 genetically identical haploid cells which are called daughter cells
same thing with diploid cells
20 points! Help please
Answer: 2N2O3 -> 2N2 + 3O2
Explanation:
Answer:
2 2 3
Explanation:
2N2O3=2N2+3O2.. ....
Calculate the specific heat of the substance if 373 J is required to raise the temperature of a 312 gram sample by 25°C?
Explanation:
Q = 373J
∆∅ = 25°C
m = 312g
c = x
Q = mc∆∅
373 = 312(x)(25)
373 = 7800x
x = 373/7800
x = 0.0478J/(g°C)
The specific heat of the substance if 373 J is required to raise teh temperature of a 312 gram sample by 25°C is 0.0478 J/g
What is specific heat?The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.
By the formula of specific heat
Q = mc∆∅
Q = 373J
m = 312g
∆∅ = 25° C
Putting the values in the equation
[tex]373 = 312\times c \times (25)\\\\373 = 7800c\\c= \dfrac{373}{7800} = 0.0478J/(g \circ C)[/tex]
Thus, the specific heat of the substance if 373 J is required to raise teh temperature of a 312 gram sample by 25°C is 0.0478 J/g
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Elements with a high ionization energy lose electrons easily (True or False).
Answer:
False
Explanation:
I need help with these question THAK YOU!!!!
what is Hund's rule?
STOICHEMTRY
A-C PLEASE
Answer:
1=the 77 or and 57
Explanation:
From point A to point B, the car will . From point B to point C, the car will . Assuming the washer on the car is not blocked by the book, once the car hits the book, the washer will still have . This experimental design will examine Newton’s law.
Answer:
Accelerate, Have Constant velocity, Velocity, and First
Explanation:
Got it right on edge. have a wonderful day!!!
From point A to point B, the car will . From point B to point C, the car will assuming the washer on the car is not blocked . It will examine Newton’s law will be "Accelerate, Have Constant velocity, Velocity, and First."
What is Newton’s law ?The link between an object's motion with even the forces acting on it is outlined by Newton's laws of motion, which were three fundamental principles of classical mechanics.
What is velocity?The displacement of the item in one unit of time would be the definition of velocity.
Therefore, from point A to point B, the car will . From point B to point C, the car will assuming the washer on the car is not blocked . It will examine Newton’s law will be "Accelerate, Have Constant velocity, Velocity, and First."
To know more Newton’s law and Velocity
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The sun radiates energy towards the ______ surface and some of this radiant energy is in the form of ________.
Answer:
Earth; heat.
Explanation:
Radiation can be defined as the flow, transmission or emission of energy in the form of atomic and subatomic particles and waves through a material medium or space.
Solar radiation is a form of electromagnetic radiation emitted by the sun on the earth's surface as ultraviolet, infrared and visible light.
Hence, the sun radiates energy towards the earth surface and some of this radiant energy is in the form of heat. Radiation is generally considered to be the least important mode of the transportation of heat from one point to another in planet earth.
HELP ASAP.
If correct, will give brainliest.
Answer:A
Explanation:
potential energy is stored energy and so the only option that isn’t moving or using energy is a
Question 2
Which of the following stages of the water cycle is related to plants undergoing cellular respiration?
a
infiltration
b
transpiration
c
condensation
d
evaporation
silver (I) nitrate reacts with nickel (II) chloride to produce silver (I) chloride and nickel (II) nitrate wright the balanced chemical equation for this
Answer: 2 AgNO3(aq) + NiCl2(aq) ⇒ 2 AgCl(s) + Ni(NO3)2 (aq)
Explanation:
is eye drops a asid base or neutral?
plzz help mee
Answer:
Its Neutral
Explanation:
I got this right in a quiz. I hope this helps!!
Identify the reaction type:
Si(s) + Cl2(g)
- SiCl4(1)
synthesis
O decomposition
single replacement
double replacement (or neutralization)
O combustion
Answer:serch it up i found it on the second website
Explanation:
Which set of coefficients will balance this chemical equation?
__C2H4(g) + __O2(g) → 2CO2(g) + 2H2O(g)
Answer:
Explanation:
USE UR PERDICIRTON TABLE
HELP ME PLEASE ILL GIVE EC AND BRAINLESTPhotosynthesis
Matter and Energy
Claim-Evidence-Reasoning
Name:
Date:
Scenario
Below is the equation of photosynthesis. Photosynthesis is a process that takes place in plants.
Notice that CO, and water are converted into sugar and oxygen.
External Data
600,
6 H,0
Water
light Cº,
+
602
+
Oxygen
ton Dede
Sugar
Prompt:
When you go home Dnight, your mother asks you to explain to her what happens during the
process of photosynthesis. Your mother is a science teacher, so make sure you use scientific terms
to give her a scienífic explanation of how energy is stored as sugar in plants through
photosynthesis.
I
Claim:
Evidence:
Reasoning:
Rebuttal:
Answer:
photosynthesis happens when spring is happening because of the pollen and soil
Explanation:
Which BEST describes the role of mitochondiſa in maintaining homeostasis for the cell?
A Mitochondria control what crosses into and out of the cell.
B. Mitochondría manufacture and deliver proteins for the cell.
С.
Mitochondria aid in the movement of organelles around the cell.
D.
Mitochondria produce most of the energy that is used by the cell.
Answer: D
Explanation:
The mitochondria is the power house of the cell, remember power as energy
Please help I’ll even give you brainliet
What is the molecular formula for a compound that is 34.31% sodium, 17.93% carbon, 47.76% oxygen and has a molar mass of 134.00g?
Answer: Na2C2O4 probably sodium oxalate
Explanation: assume you have 100 g substance.
Mass of Na is m(Na) = 34.31 g, m(C) = 17.93 g and m(O) = 47.76 g.
Calculate moles n(Na) = 34.31 g/22.99 g/mol= 1.49 mol.
For C n(C) = 1.49 mol and n(O) = 2.985. You divide all by 1.49 you
Get n(Na) : n(C) : n(O) = 1:1:2 M(NaCO2) = 67 g/mol.
Divide 134:67 = 2. You get formula Na2C2O4
kinetic energy???
short version please
Answer:
Kinetic energy, form of energy that an object or a particle has by reason of its motion.
Explanation:
a shorter one
Answer:
is the energy of a body due to its motion pls mark me us briansit it means lot to me follow for more answer
And this one too please
Answer: Groups 15 and 16.
Explanation:
All other answer choices include metals, which form ionic bonds.
BaCl² produces barium gas plus chlorine gas when heated. what would be the combined mass of the barium and chlorine if 15 g of Barium chloride was heated
I am very dull and brittle, I can't transfer thermal energy very well, and I tend to be a gas. I must be a ...
a
metal
b
nonmetal
c
metalloid
d
noble gas
Answer and Explanation:
A nonmetal is the answer.
Cause they are dull and brittle, and can be a gas at times at room temperature.
#teamtrees #PAW (Plant And Water)