How many grams of aluminium chloride are produced when 123.2g of chlorine react with aluminium
Answer:
Mass = 154.67 g
Explanation:
Given data:
Mass of aluminum chloride produced = ?
Mass of chlorine = 123.2 g
Solution:
Chemical equation:
2Al + 3Cl₂ → 2AlCl₃
Number of moles of chlorine:
Number of moles = mass/molar mass
Number of moles = 123.2 g/ 71 g/mol
Number of moles =1.74 mol
Now we will compare the moles of aluminum chloride and chlorine.
Cl₂ : AlCl₃
3 : 2
1.74 : 2/3×1.74 = 1.16 mol
Mass of AlCl₃:
Mass = number of moles × molar mass
Mass = 1.16 mol × 133.34 g/mol
Mass = 154.67 g
Brian is making a cake for his friend's birthday. He combines the ingredients for the cake and then pours the batter into two pans and bakes them for 45 minutes in the oven. While the pans are in the oven, he combines butter, sugar, and milk and mixes them together to make the icing. What type of changes created the cake and the icing?
A. Both the icing and the cake are formed by physical changes.
B. Both the icing and the cake are formed by chemical changes.
C. The icing is formed by a chemical change and the cake is formed by a physical change.
D. The cake is formed by a chemical change and the icing is formed by a physical change.
Answer:
it’s D.The cake is formed by a chemical change and the icing is formed by a physical change
Explanation:
It’s because when the cake was baking there was nothing physical about it so it was a chemical change the icing is formed by a physical change because all you did was mix three ingredients together
The type of changes that created the cake and the icing is;
Option D; The cake is formed by a chemical change and the icing is formed by a physical change.
This is about understanding type of changes in chemistry.
Physical change is defined as a change that affects the form of a compound or element but it doesn't affect its' chemical composition.Meanwhile, chemical change is defined as a change that affects the composition of a compound and a new substance is formed.Now, for brian's cake he has combined raw ingredients into two pans and bakes the cake. For the cake to be baked, it means the ingredients mixed have changed from liquid to solid and also a new substance has been formed. Thus, we can say that the cake was formed from chemical change.Meanwhile, the icing was formed by physical change because it did not undergo any chemical process and no new substance was formed as only butter, sugar and milk were mixed together.Read more at; https://brainly.com/question/19046658
10. calcium fluoride ca
11. sodium nitride
12. magnesium chloride
In formulas
Answer:
10=CaF2
11=Na3N
12=MgCl2
Explanation:
Answer:
10. CaF2
11. Na3N
12. MgCl2
Explanation:
PHYSICS.... NOT CHEMISTRY
If the gravitational force between the two objects is 2.0×10 ^-7 N and the value of gravitational constant, G= 6.67×10 ^-11 n m² kg¯², what is the value of D?
F=Gm1m2/D*2
or,2.0×10^-7 = (6.67×10^-11 ×75×90)/D^2
or,2.0×10^-7 = (45022.5×10^-11)/D^2
or,D^2=22511.25×10^-4
D=1.5003m
I GIVE BRAINLIEST TO WHO EVER GETS IT RIGHT!
which two scientist proposed an atomic model with a nucleus?
A.) Thomson
B.) Bohr
C.) Dalton
D.) Rutherford
Answer: B. Bohr and D. Rutherford
Identify the major force between molecules of pentane and hexane
Answer:
induced-dipole induced dipole forces.
Explanation:
Which terms are used to identify pure substances?
Answer:
mabey c or d
Explanation:
color, odor, density, melting temperature, boiling temperature, and solubility are examples of physical properties. Physical properties can be used to identify a pure substance.
How many elements do all the “s” orbital span (go across) in each period?
a) 2
b) 6
c) 10
d) 14
The elements do all the “s” orbital span (go across) in each period is 2. Thus option a is correct.
What are elements?Elements are defined as a pure substance made up of only one sort of atom with the same number of protons in its nucleus.
It can also be defined as the a substance that can't be broken down into anything else.
Sublevels are defined as a quantum theory-defined energy level Sublevels are energies associated with electrons in chemistry.
There are mainly four sublevels
s sublevelp subleveld sublevelf sublevelThus, the elements do all the “s” orbital span (go across) in each period is 2. Thus option a is correct.
To learn more about elements, refer to the link below:
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plssss help for a and b and if possible pls give an explanation but you don’t have to!
Answer:
0 net force it is balanced
Explanation:
If the amount of force is the same on both sides the net force equals 0
Determine the possible traits of the calves if:
A red bull (RR) is mated to a red (RR) cow 1
Answer:
A red (RR) bullis mated with white (WW) cow 1
Answer:
A roan (RW) is mated with red(RR)cow 3
Answer:
Answer:
1. All red calves i.e. RR
2. All roan calves i.e RW
3. 2 red calves (RR) and two roan calves (RW)
Explanation:
According to this question, a gene coding for fur colour in cattle is involved. Red alleles (R) and white alleles (W) are co-dominant to produce a roan cattle (RW). The possible traits of the following crosses are (see attached punnet square):
1) A red bull (RR) is mated to a red (RR) cow: All red calves i.e. RR
2) A red (RR) bullis mated with white (WW) cow: All roan calves i.e RW
3) A roan bull (RW) is mated with red (RR) cow: 2 red calves (RR) and two roan calves (RW).
The mixture in the large beaker still looked clear like water, but when the students, one at a time, carefully touched the outside of the large beaker, it felt warm to the touch.
Why did the large beaker most likely feel warm?
Answer:
A chemical reaction produced a new substance.
Explanation:
I just answered this on the study island quiz.
Answer:
A chemical reaction produced a new substance or "A"
Explanation:
A sample of which element could have a volume of 1.5 cubic centimeters (cm3) and a mass of 7.5 grams (g)?
Answer:
5 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{7.5}{1.5} \\ [/tex]
We have the final answer as
5 g/cm³Hope this helps you
In the cell, amino acid molecules combine to form
Answer:
A polypeptide chain!
Explanation:
Hopefully this helps! If this wasn't the answer you were looking for please don't hesitate to comment here or private message me! Have a nice day/night! :))
Amino acids are the fundamental building blocks of proteins. In the cell, amino acid molecules combine to form polypeptide chain or protein.
What are amino acid ?The term amino acids are defined as the building block of the protein. Amino acids are the fundamental building blocks of proteins. Their molecule contains both an amino and a carboxylic group.
Alpha-amino acids are amino acids that have an amino and a carboxyl group attached to the same carbon atom, i.e., an alpha-carbon atom. Glycine, Alanine, etc.
Proteins are made up of monomers called amino acids. A protein is composed of one or more linear chains of amino acids, each of which is referred to as a polypeptide.
Thus, In the cell, amino acid molecules combine to form polypeptide chain or protein.
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Compression is the type of stress that deforms rock at which location ?
Answer:
Compression is common at convergent boundaries, tension in divergent boundaries, and shear at transform boundaries.
Explanation:
The three main types of stress go along with the three types of plate boundaries. Rocks can bend and fold. Rocks can also fracture and break.
The smallest unit of life is a _____, and all organisms have at least one.
Answer:
cell
Explanation:
hdjdjdjjsisidjsjsjjsisisiisjsjsjs
Answer:
cell
Explanation:
That is the smallest unit of life, and every living thing has at least one cell, such as unicellular living things.
What type of waves transmit signals in satellite communication?
A. Microwaves
B. X-rays
C. Gamma Rays
D. Radio Waves
Answer:
satellites communicate by using radio waves to send signals to the antennas on the Earth. the antennas then capture those signals and process the information coming from those signals.
hope this helps:)
Answer:
D
Explanation:
Kind of self explanatory don't you think?
What’s the best answer?
how many equivalent statements are needed to convert 23.4 Gm into mm? 20 points!
Answer:
23.4 x 10¹²mm
Explanation:
Given problem;
Convert Gm to mm;
Gm = Gigameters
mm = millimeters
1 Gigameter = 1 x 10⁹m
1000mm = 1 m
To convert from Gm to mm;
23.4 Gm x [tex]\frac{1 x 10^{9} m}{1Gm}[/tex] x [tex]\frac{1000mm}{1m}[/tex] = 23.4 x 1 x 10⁹ x 10³ =
= 23.4 x 10¹²mm
A student would like to test the effect of eating a lot of candy on
student hyperactivity. She sets up two groups for her experiment and
measures her results in the number of times a student jumps out of their
seat. What is the independent variable?
Answer:
Number of candies
Explanation:
The independent variable in this experiment is the number of candies eaten by the student.
An independent variable is best pictured as the cause in an experiment. It is the reason why the effects in experiments are produced.
In this experiment, the hyperactivity is the hyperactivity is the dependent variable. It is the effect that is produced in this set up.
Answer:
Just to make it short, its eating a lot of candy
Explanation:
Uranium - 235
Atomic #
Atomic mass
# of protons
# of neutrons
# of electrons
Answer:
# of protons
Explanation:
Which best describes the current atomic theory? (1 point)
a
Since it is only a theory it should not be used in practice.
It has not been tested enough to be useful for developing technology,
b
Ос
It is the most powerful explanation scientists have to offer at this time.
Od
There is very little chance it will be changed in the future.
Answer:
с . It is the most powerful explanation scientists have to offer at this time.
Explanation:
The current atomic theory can best be described as the most powerful explanation scientists have to offer at this time.
Using this explanation, scientists can make technological innovations based on the theory.
As a theory and with more researches, the theory can be improved further with time. The theory no doubt might be changed in the future if more research evidence supports an alternate view.electronegativities of elements from Period 3 and Group 17. Fill in the missing values in the table so you can compare the electronegativities of the elements. After the table is filled in, compare the values in each column. A = B = C =
Answer:
A = 3.16
B = 1.31
C = 0.93
Explanation:
Classify the triangle based on the side lengths 9, 40, and 41
Answer:
That's a right Triangle
Explanation:
algebra.com
Answer:
scalene triangle
Explanation:
Scalene triangles don't have any equal side lengths.
1. What is the electron configuration for zirconium?
1s 2s 2p 3s 3p 3d 10 452 4p 532 44?
132 232 2p 3s 3p 432 3410 4p6 552 44²
O 132 232 2p 3s 3p 3040 4p 58% 42%
O 1:2 232 2p 3s 3p 452 300 dp" 4d?
Answer:
nose Inglés
bssnsnnsnsnsnsnsks
Answer: I think its the first won
Explanation:
(copped and pasted from website)
Zirconium
Electronic configuration
1s22s22p63s23p63d104s24p64d25s2
Which of these elements is the most chemically reactive?
A zinc (Zn)
B. iron (Fe)
C. potassium (K)
D. germanium (Ge)
Answer:
a zinc is the most reactive
Which of the following best describes the Valence Shell Electron Pair Repulsion Theory (VSEPR)?
Answer:
Electron pairs are arranged as far apart from each other as possible.
Explanation:
Like charges repel therefore, VSEPR theory is the "...repulsions between electron pairs present in the valence shell of the central atom."
Atoms tend to form compounds because they have an unstable number of ___
A. Protons
B. Isotopes
C. Valence electrons
D.neutrons
What is the ionic charge of elements in column 1?
Every element in the first column varieties a cation with charge 1+. Every component in the 2d column varieties a cation with charge 2+. Elements in the third to remaining column nearly all shape an anion with a 2- charge and factors dwelling in the 2d to closing column nearly all structure anions with a 1- charge.
help me plsssss ))):
Answer:
crushing an ice cube
Explanation:
crushing an ice cube can be redone by freezing it again in its position
1) Protons have what kind of charge?
2) Electrons have what kind of charge?
3) Neutrons have what kind of charge?