Consider the following unbalanced equation.
Ca(OH)2 + (NH2)2SO4 → CaSO4 + NH3 + H2O
Help for 70 points please explain why too.
Answers
Answer:
1 Ca(OH)2 + 1 (NH4)2SO4 ---> 1 CaSO4 + 2 NH3 + 2 H2O
Explanation:
The photo I attached should make more sense as an explanation.
When balancing equations, the first and most important step is to count the # of each type of element on each side.
In this problem there are 5: Ca, O, H, N, and S.
Once you do that you can begin balancing.
Here is the initial tally for the elements in this problem:
On the left.....
Ca - 1
N - 2
S - 1
O - 6
H - 10
On the right.....
Ca - 1
N - 1
S - 1
O - 5
H - 5
Looking at these values, we can see N, O, and H all need adjusting the right side. You should never start balancing with O or H unless they are the only elements that need adjusting. They usually balance out with the rest of your work or with water in the end.
So given all of that, you should start balancing with N on the right. Giving NH3 a coefficient of 2 will change the number of Nitrogen atoms on the right to 2. Be careful though! It will also change the number of Hydrogen atoms from 5 to 8 (because (2*3) =6 and 6+2 =8).
Let's tally our numbers again.
On the left..... (these should be unchanged)
Ca - 1
N - 2
S - 1
O - 6
H - 10
On the right.....
Ca - 1
N - 2
S - 1
O - 5
H - 8
Okay, now we see only O and H need adjusting on the right. Luckily there is H2O so we can do that without impacting the number of other atoms.
Give H2O a coefficient of 2 and count the number of atoms on the right again.
On the right.....
Ca - 1
N - 2
S - 1
O - 6 (because 4 from CaSO4 plus 2 from 2H2O = 6)
H - 10 (6 from NH3 plus 4 from 2H2O = 10)
Do these numbers match what you have on the the left side of the equation? Yes! It is balanced so you do not need to adjust anymore. Your coefficients in the answer will be 1-1-1-2-2.
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Answer: what are options
Explanation:
What do eukaryotic cells, prokaryotic cells and viruses all have in common?
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Answer:
Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalization of functions.
Explanation:
is this okay???
The substances that get rid of carbamates and organophosphates are?
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Answer: Alfracon
...............................
2. Why do you think it matters how close or how far an object is from the Sun to
sustain life on that object's surface?
PLEASE HELP ASAP
Answers
Answer:
In Copernicus's heliocentric model the planets orbit in circles around the sun. One may wonder how Copernicus determined the order of the planets and the size of their orbits – after all, he had no benefit of pictures from spacecraft or even a telescope.
Explanation:
WHOEVER ANSWERS THIS QUESTION FIRST WILL GET BRAINLIEST!!
PLEASE HURRY!!!
Select 5 elements that form ions in an isoelectronic series with the noble gas Argon. Support your claim with evidence and scientific reasoning.
Answers
Answer:
Explanation:
what is the mass of a 7.91 cm cubed piece of lead having a density of 11.34 g/cm cubed
Answers
Answer:
The answer is 89.70 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density = 11.34 g/cm³
volume = 7.91 cm³
We have
mass = 11.34 × 7.91 = 89.6994
We have the final answer as
89.70 gHope this helps you
How do the gravitational forces change as the objects get closer to each other?
Answers
Answer:
you can use the example of two magnets
Answer: The gravitational force Increase as the objects get closer.
Explanation:
Requires a medium to travel (travel fastest through solid-like metal train tracks A Waves B Sound Waves C Light Waves D matter
Answers
Answer:
b
Explanation:
becuase of sound waves
Answer question number 4
Answers
Answer: Choice A
Explanation:
Which of the following is NOT an example of a chemical change? *
O Corrosion
O Grinding
O Combustion
O Rust
Answers
compound name of SO2
Answers
what is the main function of this organelle in the cell?
Answers
Answer:
[tex]to \: use \: energy \: from \\ \: sunlight \: to \: make \: sugars.[/tex]
Explanation:
[tex]the \: main \: function \: of \: this \: organelle \\ \: in \: the \: cell \: is \: to \: use \: energy \: from \\ \: sunlight \: to \: make \: sugars.[/tex]
What is the purpose of the title of a line graph
Answers
Answer:
It tells about the data for each line graph is plotted.
Explanation:
Answer:
It can describe what the line graph is measuring and how it is measuring it
Which best explains the formation of polyester?
a condensation polymerization of a carboxylic acid and an alcohol
an addition polymerization of a carboxylic acid and an alcohol
a condensation polymerization of two alcohols
an addition polymerization of two alcohols
Answers
Answer:
The correct answer is - a condensation polymerization of a carboxylic acid and an alcohol
Explanation:
Condensation polymerization is a type of polymerization that forms a byproduct by the bonding of two different types of monomers during polymerization.
Polyester is an example of condensation polymerization which is formed by the polymerization of carboxylic acid and an alcohol monomer. In addition polymerization, there is only one type of monomers bond together.
Answer:
A. a condensation polymerization of a carboxylic acid and an alcohol
Explanation:
Element X has two natural isotopes. The isotope with a mass of 10.012 amu (10X) has a relative abundance of 19.91%. The isotope with a mass of 11.009 ammu (11X) has a relative abundance of 80.09%. Calculate the atomic mass of this element.
Answers
Answer:
10.81
Explanation:
you can see the answer at the pic
What causes the
differences in physical characteristics like hair color among people?
1. diferent versions of genes
2. variations in DNA length
3. different numbers of chromosomes
4. variations in cell nucleus size
Answers
sorry if it’s wrong, but that answer seems reasonable
Answer:
b
Explanation:
i took the test
Which types of matter are made of atoms
a. Mixtures
b. Elements
C. Compounds
D. All of the above
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Answer:
D all above yes I think it's all above
Answer: D
Explanation: All of the above.
Plz mark brainliest:)
marine science flvs 2.03
can someone please send the answers for this!!!
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Answer:
101
Explanation:
Answer:
Explanation:
What purpose do neutrons serve in the nucleus ? What happens if there are too many or too few neutrons?
Answers
Answer:
These nuclei with different numbers of neurons are called isotopes
Answer:
neutrons' main function is to attract each other and keep the nucleus of an atom intact. a nucleus will become unstable if there are too many or too few neutrons in it.
Explanation:
too many= it will undergo beta decay (the neutrons will changes into proton)
too few= there will be an imbalance between forces which leads to nuclear imbalance
explanation of atomic radius
Answers
Ah yes.
The atomic radius is basically the distance between the nucleus of the atom and the outermost electron in the farthest orbital of the atom. The more bigger the atomic radius , the less powerful is the force that holds together the nucleus and its electrons.
how to check atomic mass?
Answers
Answer:
There are multiple ways to check mass but I'll tell you one. Look below
Explanation:
One easy way of checking atomic mass is by adding protons and neutrons.
For example:
We have 5 protons and 4 neutrons.
5+4=9
I hope this helps (:
A cube of metal has a mass of 5.05 x 10°g and its density is known to be 12.77 g/mL, what is the volume of this metal?
A 395.5 mL
B. 2.529 mL
C. 63,910 mL
D. 64.48 ml
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Answer:
Explanation:
option A is correct
How did John Newlands order the elements?
Answers
Hello friend! Hopefully this helps you as much as needed!
An English scientist called John Newlands put forward his Law of Octaves in 1864. He arranged all the elements known at the time into a table in order of relative atomic mass. He then put the similar elements into vertical columns, known as groups.
What is the mass obtained of Ag from the reaction of 3 moles of AgCl
Given= Zn + 2AgCl —> ZnCl2 + 2Ag
Answers
Answer:
323.7g
Explanation:
Given parameters:
Number of moles of AgCl = 3 moles
Unknown:
Mass of Ag = ?
Solution:
We solve this problem by working from the known to the unknown;
The known here is AgCl;
From the balanced equation:
Zn + 2AgCl → ZnCl₂ + 2Ag
2 moles of AgCl will produce 2 moles of Ag
3 moles of AgCl will produce 3 moles of Ag
The mass of Ag will be;
Mass of Ag = number of moles x molar mass
Molar mass of Ag = 107.9g/mol
Mass of Ag = 3 x 107.9 = 323.7g
What do we call the bond that forms when atoms share two pairs of electrons
(I have a test tomorrow and I'm doing a review right now but have no idea what the answer to this is.)
Answers
1. Calculate the average atomic mass of iron if its abundance in nature is 15%-iron-55 and
85% iron-56
Answers
The average atomic mass of iron : 55.85 amu
Further explanationThe elements in nature have several types of isotopes
Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.
An atomic mass unit = amu is a relative atomic mass of 1/12 the mass of an atom of carbon-12.
The 'amu' unit has now been replaced with a unit of 'u' only
Atomic mass is the average atomic mass of all its isotopes
atomic mass X = mass isotope 1 . % + mass isotope 2.% ...
The average atomic mass of iron
[tex]\tt =0.15\times 55+0.85\times 56\\\\=\boxed{\bold{55.85~amu}}[/tex]
The average atomic mass of iron : 55.85 amu
Calculation for average atomic mass:Isotopes are atoms whose atoms have the same number of protons while still having a different number of neutrons.
An atomic mass unit = amu is a relative atomic mass of 1/12 the mass of an atom of carbon-12.
The 'amu' unit has now been replaced with a unit of 'u' only
Atomic mass is the average atomic mass of all its isotopes.
Atomic mass X = mass isotope 1 * Mas % + mass isotope 2* Mass %
The average atomic mass of iron:
=0.15 * 55 + 0.85 * 56
=55.85 amu
Thus, the average atomic mass of iron : 55.85 amu
Find more information about Average atomic mass here:
brainly.com/question/338808
A student states that photosynthesis is conducted only in plant cells and that cellular respiration occurs only in animal cells. Tell whether the student is correct and why. In your response, be sure to describe both processes and the structures involved. Upload your answer below.
Answers
Answer:
This is correct
Explanation:
This is correct because for photosynthesis you need organelles such as chloroplasts, chloroplasts absorb light energy and convert it into usable energy for plants. Animal cells do not have chloroplasts/similar organelles so they can't absorb energy from the sun, Animal cells use mitochondria which takes energy from our food and breaks it down into usable energy(such as ATP) to be transported.
A student combines two clear liquid chemicals together in a beaker. When the two chemicals are combined, bubbles are formed, the solution turns blue, and you can see flakes of something forming on the bottom of the beaker. Is this a physical or chemical change? Why?
Answers
Answer:
chemical change
Explanation:
A physical change is one that makes changes to the physical properties of matter. In many cases, the difference is usually reversible. Examples include boiling, melting, freezing, the magnetization of metals, etc.
A chemical change is one in which a new kind of matter is formed. It is usually accompanied by energy changes, i.e., the evolution or absorption of energy in the form of heat or light. This process is not easily reversible. Examples include; combustion, rusting of iron, precipitation, the souring of milk, etc.
From the question given, the combination of two clear liquid in a beaker which results to formation of bubbles and changes in coloration of the solution is a chemical change.
The first column of the periodic table is called the
Answers
if i’m correct pls mark me brainliest <3
During evaporation, what causes certain liquid molecules to become vapor molecules? A. Decreased fluidity A. Increased viscosity A. Decreased kinetic energy A. Increased kinetic energy.
Answers
Answer:
The answer is A. Decreased Fluidity
Explanation:
Taking the test on preformance matters
In evaporation, particles of liquids take energy in the form of sunlight from the surrounding and then convert into vapor phase. Increased kinetic energy causes certain liquid molecules to become vapor molecules.
What is evaporation?Evaporation is a physical process in which the water in liquid state converts to gaseous state at the temperature below its boiling point. Evaporation happens before the boiling process.
Evaporation causes cooling effect in the surrounding. During summer when water is kept in earthen pot water cools, this is because of the evaporation process.
Evaporation is affected by temperature. As the temperature increases, kinetic energy of liquid molecules also increases and hence the rate of evaporation increases.
Therefore, increased kinetic energy causes certain liquid molecules to become vapor molecules.
To know more about evaporation, here:
https://brainly.com/question/8169606
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