Answer:
Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another. This exchange results in a more stable, noble gas electronic configuration for both atoms involved. An ionic bond is based on attractive electrostatic forces between two ions of opposite charge.
Explanation:
20 points! Help please
Answer: 2N2O3 -> 2N2 + 3O2
Explanation:
Answer:
2 2 3
Explanation:
2N2O3=2N2+3O2.. ....
2) Convert 6.11 g of sodium hydroxide, NaOH to moles.
Answer:
moles NaOH = = 0.1528 mole NaOH
Explanation:
To convert grams to moles => divide grams by formula weight
To convert moles to grams => multiply moles times formula weight
In short ...
grams => moles => grams/formula wt.
moles => grams => moles x formula wt.
This problem:
moles NaOH = 6.11g/40g/mole = 0.1528 mole NaOH
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.
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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If 20g of fe react with 5l of chlorine gas at stp, how many grams of iron 3 chloride can be produced
Answer:
.........................................
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!!
Elements with a high ionization energy lose electrons easily (True or False).
Answer:
False
Explanation:
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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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
LED can be used in place of torch bulbs because____________
Please answer and thank you
Answer:
they are much cheaper and because thy last for a long time as they are durable and not expensive
because LED use less energy than torch bulb
LED use more than 75% less energy than torch bulb
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:
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
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
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
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
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
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."
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STOICHEMTRY
A-C PLEASE
Answer:
1=the 77 or and 57
Explanation:
The reaction of 4.8g of sulfur and 5.4g aluminum yields 4.5g Al2S3. 3S+2AL-->Al2S3 Determine the percent yield of Al2S3.
Answer:
59.9% is the percent yield for the 4.5 g of produced Al₂S₃
Explanation:
Let's determine the reaction:
3S + 2Al → Al₂S₃
First of all, let's determine the limiting reactant. We need to convert the mass to moles:
4.8 g /32.06g/mol = 0.150 moles of S
5.4 g / 26.98 g/mol = 0.200 moles of Al
3 moles of S react to 2 moles of Al
Then, 0.150 moles of S may react to (0.150 . 2)/3 = 0.1 ,moles of Al
We have 0.200 moles and we only have 0.1. As we have excess of Al, this is the excess reactant. In conclussion, the limiting reagent is S.
2 moles of Al react to 3 moles of S
Then 0.2 moles of Al may react to (0.2 . 3) /2 = 0.3 moles of S. (We only have 0.150 moles)
Let's go to the product, 3 moles of S can produce 1 mol of Al₂S₃
Then 0.150 moles of S, may produce (0.150 . 1) /3 = 0.05 moles.
We convert moles to mass to determine the thoretical yield:
0.05 mol . 150.15g /mol = 7.50g
Percent yield = (Produced yield/Theoretical yield) . 100
% = (4.5g / 7.5g) . 100 = 59.9%
Find a room that can be made completely dark. In the room, tape the pieces of construction paper on a wall, slightly above eye level. Turn on the flashlight, and turn off the lights in the room. Hold the flashlight over your head and angle it down slightly so the light hits the colored paper. Can you see the light traveling through the room before it hits the paper?
Answer:
Yes, I can see the light traveling through the room before it hits the paper.
Explanation:
edmentum
Since light rays travels in a straight line, the light traveling through the dark room can be seen before it hits the paper.
What are light rays?Light rays refers to a straight line path through which light waves travel.
Light rays travel in a straight line and this phenomenon is known as the rectilinear propagation of light.
In a dark room, the path of light rays travelling in a straight can be seen.
Therefore, the light rays traveling through the room can be seen before it hits the paper.
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Calculate the number of atoms in 0.50 moles of Barium
In what type of reaction does one product break down to form 2 new products?
Answer:
decomposition reaction
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:
And this one too please
Answer: Groups 15 and 16.
Explanation:
All other answer choices include metals, which form ionic bonds.
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
which molecule is a branched alkane
a) trans-2-pentane
b) nonane
c) 3-methylhexane
d) 2-nonyne
Answer:
The answer is c
Explanation:
Because it is
3-methylhexane is the molecule that is a branched alkane. Therefore, the correct option is option C.
What is alkane?Alkanes, often known as paraffin, are acyclic saturated hydrocarbons in organic science. In other terms, an alkane is made up of carbon and hydrogen atoms that organise themselves in a tree-like arrangement with only single carbon-carbon bonds. Alkanes have the chemical formula CnH2n+2 in general.
Methanogenic bacteria generate methane, and certain long-chain alkanes have pheromone-like properties in some animal species or serve as safeguarding waxes in some plants and fungus. However, the majority of alkanes have little biological action. 3-methylhexane is the molecule that is a branched alkane.
Therefore, the correct option is option C.
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i need help again guyss
help 4 me???? ples????
Answer:
its the first one.
Explanation:
If sodium loses an electron, it now has 11 protons, 11 neutrons, and only 10 electrons, leaving it with an overall charge of +1
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