Answer:
3 different elements are present in the compound.
Identify the following element: a metal, 2 valence electrons, +2 oxidation number, valence electrons are in period 4.
Answer:
Calcium
Explanation:
I just checked the periodic table! This is right checked twice, I hope this helped first time answering a question. Good luck!
Elements are usually dull, brittle and do not conduct electricity are know as_____.
Points: 46
Answer:
nonmetals. it's one of them
PC13 ionic or covalent
Answer:
The bond between Phosphorus and Chlorine in PCl3 is covalent as chlorine needs one electron and phosphorus has metallic character and easily donate electron
Analyze the reaction of solid magnesium and water. Which pair of reactants and products in the table below represent the correct balanced equation for the reaction?
Answer:
3 is correct answer I think
Explanation:
Labor unions arose in the nineteenth century as increasing numbers of Americans took jobs in factories, mines, and mills in the growing industrial economy.
The Knights of Labor, founded in 1869, was the first major labor organization in the United States. The Knights organized unskilled and skilled workers, campaigned for an eight hour workday, and aspired to form a cooperative society in which laborers owned the industries in which they worked.
The Knights’ membership collapsed following the 1886 Haymarket Square riot in Chicago. By 1886 the American Federation of Labor (AFL), an alliance of skilled workers’ trade unions, was growing.
Based on the graph, what is the approximate half-life of the reaction shown below
Answer: 2.1 minutes
Explanation: Based on the graph, what is the approximate half-life of the reaction shown below
What’s the correct answer to this problem?
In order for a chemical reaction to take place, a certain amount of _____ must be present.
Answer:
The answer is energy. Please give me Brainliest!
Explanation:
Raising the concentrations of reactants makes the reaction happen at a faster rate. For a chemical reaction to occur, there must be a certain number of molecules with energies equal to or greater than the activation energy.
The characteristics “fingerprints” of light produced when a substance is given energy are called…
A. Groundlings
B. Quantums
C. Spectrums
D. Amplitudes
A spectrum is a pattern is unique to a substance and can be used identify it.
According to Max Plank, energy occurs in packets called quanta. Hence, energy is not continuous but takes on discrete values which are integer multiples of a fundamental amount.
Again, when a substance is given light energy, a characteristic fingerprint is obtained. This pattern is unique to the substance that has it. These characteristics “fingerprints” are called spectrums.
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Question 24 of 25
How can one tell if a reaction is a redox reaction?
O A. Elements change phases.
O B. A precipitate is formed.
O C. Spectator ions are present.
O D. Electrons are gained and lost.
Answer:
D. Electrons are gained and lost
Explanation:
When electrons are gain and lost, redox reaction takes place. In redox reaction, reduction and oxidation tales place simultaneously. Therefore, option D is correct.
What is redox reaction ?Redox reactions include a change in the oxidation state of the substrate. When electrons are lost or the oxidation state increases, it is called oxidation; when they are gained or the oxidation state decreases, it is called reduction.
Redox reactions are those in which there is a change in the oxidation number, with both an increase and a drop in number. The reaction called non-redox if this does not take place.
Oxidation and reduction always occur jointly because any loss of electrons by one substance must be followed by a gain of electrons by another. Therefore, oxidation-reduction processes or simply redox reactions are other names for electron-transfer events.
Thus, option D is correct.
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31.) How far can a rock fly(meters). if the slingshot has a total potential of 500 Joules, and when releasing the slingshot exerts a total amount of 25 Newtons?
Which one is the answer?
Answer:
I think 1, 4, and 5 are the answers to this question. I am not sure about 4 though.
Explanation:
You have to have a power source (1), you also have to have a way to get that power somewhere else (5), and the reason for 4 would be that the power has to come back through the power source to remain working.
If a number has the units g/L then its
A) a number we are not going to use at all.
B) an imaginary unit that we are not going to use.
C) creating a relationship between mass and volume
D) a relationship between volume and distance.
Answer:
C) creating a relationship between mass and volume
g/L
g or gram is mass
L or Litres is for volume
Which of these substances is commonly refined by electrolysis?
brine
rust
titanium
water
I believe the answer would be titanium. Good luck on your assignment and have a happy christmas :)
4. Initially, 1 mol of oxygen (assumed to be an ideal gas) has temperature 310 K and volume 12 L. We will allow it to expand to volume 19 L. (a) What would be the final temperature if the gas expands adiabatically
Answer:
490.83 oK
Explanation:
First of all, we better agree on the meaning of the word adiabatically. It means without the loss or gain of heat. So nothing is given up to or taken from the environment.
This also assumes that no change has occurred in the pressure.
T1 = 310 oK
T2 = ?
V1 = 12 L
V2 = 19 L
T1/V1 = T2/V2
310 / 12 = x/19 Multiply both sides by 19
310*19 / 12 = T2 Multiply 310 * 19 on the left.
5890 / 12 = T2 Divide by 12
490.83 = T2
application of electroplating
Answer:
are you interested in tun
A force of 5N accelerates an object. The object mass is 50 g. What is the acceleration of an object?
Answer:
100 m/ s²
Explanation:
Newton's Second Law of Motion:
[tex] \boxed{ \mathsf{force = mass \times acceleration}}[/tex]
___________________
In the question:
Force applied = 5 N mass of the object experiencing force = 50 gNote that the quantities here must be in their SI units.
SI unit of Force is Newton(N).
SI unit of mass is kilogram(kg)
Force is already in it's SI unit, while mass isn't.
Converting mass from grams to kilograms:
1000 g = 1 kg
=> 1 g = 1/ 1000 kg
=> 50 g = 50/ 1000 kg
= 1/ 20 kg
___________________
Calculating acceleration:
[tex] \mathsf{5 = \frac{1}{20} \times acceleration }[/tex]
multiplying both sides by 20:
[tex] \implies \mathsf{5 \times 20= (\frac{1}{20} \times 20)\times acceleration }[/tex]
20 on the RHS gets canceled, for it's present on the numerator as well as the denominator.
[tex] \implies \mathsf{100= acceleration }[/tex]
So, here, we got acceleration = 100 m/s².
Since, the other quantities used in the formula are in their SI units, acceleration must be in it's SI unit as well.
The SI unit of acceleration is m/s²
___________________
Answer:
[tex] \boxed{ \mathsf{100 \:m/s^2= acceleration }}[/tex]
What foods have been allowed or banned in which countries? Why?
please please help me
calculate the speed of a train that travels 540 km in 9 hours
Answer:
s=d/t. d=540 t=9h
540÷90=6 km/h
oxygen is odorless and colorless physical or chemical
Answer:
(Physical or Chemical) properties of a substance can easily be observed. … (Physical or Chemical) properties can be used to identify substances. physical property. Oxygen is odorless and colorless.
Explanation:
is the transfer of heat from one object to another by direct contact. Which materials conduct heat most easily?
Answer:
Conduction is the transfer of heat between substances that are in direct contact with each other. Explanation:The better the conductor, the more rapidly heat will be transferred. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more.
Write the chemical formula for the following ionic compound nickel (III) sulfate 
Answer:
Nickel(III) Sulfate Ni2(SO4)3 Molecular Weight -- EndMemo.
Explanation:
this will explain everything
giving brainly if correct!
complete the chart above
Answer:
I hate chemistry good luck alice
Which chemical equation below shows a combination (or synthesis reaction?
A) 2KClO3 —> 2KCI+3O2
B) C+ O2 —> CO2
C) 2H2O —> 2H2 + O2
D) NaCl —> Na + Cl
Answer is C
A synthesis reaction looks like this:
A+ B → AB
3. Classify the following plants along with two main characteristics: al Cycus b) Bamboo c) Lemna d) Paddy a) Sugarcane f) Pinus g) Mango b) Mustard
Answer:
A. cycas
1. it is thick and scaly
2. it grow relatively slowly and have a large, terminal rosette of leaves.
B. bamboo
1. it is very durable
2. it is both flexible and elastic
C. lemna
1. it grows as simple free-floating thalli on or just beneath the water surface
2. it are small, not exceeding 5 mm in length
D. paddy
1. it is variety purity
2. it degree of purity
E. sugarcane
1. it is bear long sword-shaped leaves
2. it's stalks are composed of many segments, and in each joint there is a bud
Atoms with the same number of protons but with different electrical charges are called:
Answer:
It is called ions
Explanation:
Which is the correct definition of electronegativity?
Answer:
Electronegativity is defined as the tendency of an atom participating in a covalent bond to attract the bonding electrons
Explanation:
Electronegativity increases and you go up and to the right, making fluorine the most electronegative element.
What color does red cabbage juice change in ammonia?
Answer:
Green
Explanation:
Ammonia turns the cabbage juice into a blue/green color because it is a base, a material that tastes bitter and makes an acid neutral.
Answer:
green
Explanation:
I did the experiment
10. 11. What is a crystal?
Answer:
there aren't any choices on the question so here's the closest i can give. A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure
Answer:
Definition of crystal :- A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. Example of crystal :-large crystals include snowflakes, diamonds, and table salt.Meaning of crystal :-.
A piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces. Ex:- "A quartz crystal".Highly transparent glass with a high refractive index. ex :- "A crystal chandelier"Volcanoes will most likely form along a convergent plate boundary that is....
A. Continental vs Continental
B. Continental vs Oceanic
C. None of the above.
Answer:
I think its b part or none of above
Nylon is a synthetic material that has many uses. It is used in the production of machine parts, cookware, and fabric. Nylon is made from petroleum and natural gas. Suppose that there were a shortage of petroleum and natural gas. What would companies that produce nylon likely need to do? A. identify a different natural resource that nylon could be made from B. search for nylon in many different parts of the earth C. convert existing nylon back into petroleum and natural gas D. find a way to make nylon without using natural resources
In case of a shortage in petroleum and natural gas, a company should find a way to make nylon without using natural resources.
Nylon is a very important material used in numerous applications. As a result of this, the demand for nylon as a raw material has genuinely been on the high side ever since.
However, nylon production depends on petroleum and natural gas. It is possible that there could be a shortage of these resources since they are obtained from the environment. In such cases, a company should find a way to make nylon without using natural resources.
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Answer:
identify a different natural resource that nylon could be made from
Explanation:
I just did this question