Answer:
true
Explanation:
What is used up in and stops a chemical reaction?
Answer:What is used up in and stops a chemical reaction? (a) percent yield (b) limiting reactant (c) theoretical yield (d) excess reactant
The correct option is (b)
Explanation:
A chemical reaction is a chemical combination,rearrangement or disintegration of chemical substance(s) (called reactants) to form new chemical substance(s) (called products).
A limiting reactant is the reactant that is totally used up during the course of a reaction. When this reactant is used up, it limits the amount of products formed and eventually stops the chemical reaction.
Explanation:
The limiting reagent is the reactant that is used up completely. This stops the reaction and no further products are made. ... This method is most useful when there are only two reactants. The limiting reagent can also be derived by comparing the amount of products that can be formed from each reactant.
hope this helps have a nice day❤️
Write out the balanced chemical equation for the reaction for when phosphate calcium reacts with lead chloride
Answer:
Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water
(b) Zinc + Silver nitrate → Zinc nitrate + Silver
(c) Aluminium + Copper chloride → Aluminium chloride + Copper
(d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chlorid
Explanation:
Is freezing point depression a colligative property?
Answer:
Yes it is a colligative Property
Explanation:
There is freezing point depression, boiling point elevation, Osmotic Pressure, Vapor Pressure Lowering
A molecule with two atoms and no lone pairs around the central atom has a
shape.
A molecule with four atoms and no lone pairs around the central atom has a
shape.
A molecule that has two atoms and two lone pairs around the central atom has a
shape.
A molecule that has five atoms and no lone pairs around the central atom has a
shape.
DONE
Answer: linear
tetrahedral
bent
trigonal bipyramidal
Explanation:
When there are two atoms around the central atom and no lone pair of electrons, the number of electron pairs will be 2 that means the hybridization will be sp and the electronic geometry of the molecule will be linear.
When there are four atoms around the central atom and no lone pair of electrons, the number of electron pairs will be 4 that means the hybridization will be [tex]sp^3[/tex] and the electronic geometry of the molecule will be tetrahedral.
When there are two atoms around the central atom and two lone pair of electrons, the number of electron pairs will be 4 that means the hybridization will be [tex]sp^3[/tex] and the electronic geometry of the molecule will be bent.
When there are five atoms around the central atom and no lone pair of electrons, the number of electron pairs will be 5 that means the hybridization will be [tex]sp^3d[/tex] and the electronic geometry of the molecule will be trigonal bipyramidal.
Write a story about a family who uses a solar cooker and to stay healthy and safe.
What risks does nuclear waste pose to Earth or the sun or outer space?
Answer:
It could pollute other planets. Nuclear waste might be attracted by the gravitational pull of the sun and disintegrate there instead. The waste storage spacecraft could crash into a planet, moon, or another astronomical body. It could be dangerous for other life forms out there.
Explanation:
What best describes a mixture
Answer:
In chemistry, a mixture is a material made up of two or more different substances which are not chemically combined. ... A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.
Cell theory states:
l.All living cells must have a cell wall.
ll.All living cells require glucose for survival
lll.A cell is the basic unit of life.
A. l only
B.ll only
C.lll only
D. l and lll
Answer:
C
Explanation:
cell theory states:
all living things are made of 1 or more cells
all cells come from pre-existing cells
the cell is the basic unit of structure
CHEMISTRY
OXIDATION NUMBERS
please help me solve only 3 of those oxidation numbers
NO2
Cr2O72-
KCl
NH3
CaH2
SO42-
Na2O2
SiO2
CaCl2
Answer:
NO2=Nitrogen dioxide
KCL=potassium chloride
NH3=Ammonia
What type of solution do you create if you put 50g of NH4Cl in 100g of water at 70 degrees C
Answer:
hi
Explanation:
When do scientists believe matter formed
HELP MEEE PLEASEEEEE
Answer:
A has the highest concentration
Explanation:
I'll simply explain it this way;
get a color pour the whole color in a solution in container A then add a little drop in the another container(B).
you'll find out that the first container has a thicker color than container B the same thing goes for this, Beaker A has a thick looking color unlike the rest.
How many grams are 3.01 x 10^23 molecules of methane (molar
mass = 16.04 g/mol)?
Answer:
8.02
Explanation:
Give an example of a system that has energy.
Answer:
Aerobic Energy System
Explanation:
Answer:
Digestive system. It contains chemical energy. The digestive system breaks down food. Food contains chemical energy. To break down the food, the digestive system contains enzymes. Enzymes have kinetic energy to move and break down the food. They are biological catalysts. They transfer to the thermal energy store since in order to break down food at the fastest rate, they need to be at an optimum temperature.
I'm not sure if it's correct, but I'll provide some energy stores to give you inspiration:
Kinetic energy
Chemical energy
Nuclear energy
Gravitational potential energy
Elastic potential energy
Thermal energy
What is the number of copper atom in one naira coin which weight is 7.3g a sum of the material is 86%
Answer:
5.9x10²² atoms of Cu are in one naira coin
Explanation:
To solve this question we need to find the mass of Copper. Then, using its molar mass (Cu = 63.546g/mol) we must find the moles of Cu and its atoms using Avogadro's number:
Mass Cu:
7.3g * 86% = 6.278g is the mass of Cu.
Moles Cu:
6.278g * (1mol / 63.546g) = 0.099moles Cu
Atoms Cu:
0.099moles Cu * (6.022x10²³atoms / 1mol) =
5.9x10²² atoms of Cu are in one naira coinWithin a period, the nuclear charge increases as you move from left to right across the
periodic table. Again, in one sentence explain the reason for this increase. Be sure to
use your own words. PLEASE HELP
Answer:
The answer is Ionization energy.
Explanation:
Ionization Energy. The ionization energy tends to increase as one moves from left to right across a given period or up a group in the periodic table.
The number of energy levels is determined by the
a. groups
b. periods
c. valence electrons
d. atomic mass number
Answer:
The answer is C
Explanation:
I did look it up, the other kid just spams random bs for points, hope you didn't get it wrong because of him! :)
what conditions are required for establishing an equilibrium?
Answer:
1. By praying in the day or meditating
Being successful in your life will start with deciding to change in order to Learn. To make this happen, you need a good attitude and discipline. If you are already in the place where you are writing, it cannot be said because you probably like other things in your life very much. Make it a habit to start your day by praying or meditating. This will help you feel that you are more than who you think you are, thus showing that you can make it physical than you think you can and be in a different place in life than the one you are facing right now. Connect with yourself, be confident, and understand that you see better.
2.Be fully present when you are with your family
Family life is the area most associated with work-life balance. Having a good family life is like being at the top of your work-life balance. After all, your family will always be with you in your good and bad days. Friendships may end, but family relationships last. Start making changes in your life by making it in your family life. Make it a habit to spend quality time with them. Be more involved in their life, physically and spiritually.
3.Thank you to people you already know
Good connections are essential in business. It causes you to do more and better work. Good and strong connections in your personal life, on the other hand, allow you to develop yourself in different areas of life. This is another way to achieve balance. Developing your environment and making strong connections helps you learn from other people, broaden your perspective, and even broaden your vision of life. Communicate with the least person you know every day. It's always easier for you to start expanding your network with people you know. Tell him what you are busy with, ask him what he is busy with and if he needs help. Asking for help for yourself will also build trust. And it's okay to ask him if he knows other people who can help you
4.Do something creative
Although the left brain right brain dominance theory has been debunked, the world still cares more about activities attributed to the left brain, such as logic and measurement. Most businesses prefer analytical to creative thinking. And many people decide that creative thinking is impractical and discard it. Whatever your job is, you shouldn't give up your creative qualities. As an employee or employer, you have to be creative for more customers, more work and more marketing. Notice how your blood is pumping and how your adrenaline rises. Only right brain activities and creativity affect your lives. More importantly, the way to improve your vision and create new opportunities for your business and social life is through creativity. If your artist side is dominant, you should devote more time to activities such as painting, music, animation, and literature; maybe even consider starting a blog for yourself. This will help you to balance and add color to your life after a long and monotonous 'left-brain' weighted day.
5.30-minute walks
The first five items consisted of things you need to focus on every day for your emotional, relational, and personal success. But in order to develop and enjoy this success, you must also improve your Physical health. Make it a habit to move. Walk for half an hour a day, go to the gym, or even stretch your body every hour you sit down. Physical activities have many alternatives and benefits. Choose the most convenient and tasteful for you.
Explanation:İYİ GÜNLER
The number of collisions between the particles of hydrogen and nitrogen is increased by using high
pressure and _______
What one word completes the sentence?
Answer:
temperature
Explanation:
increase in temperature increases the rate of reaction
How does the length of a lunar month compare to the average length of a month in a standard 365-day calendar?
.What is the KE of a baseball that has a mass of 100 kg and is traveling at 5 m/s?
Answer:
1250joules
Explanation:
The kinetic energy is energy in motion and it's formula is
KE =1/2MV^2
M represent mass which is 100Kg.
V represent velocity which is 5m/s
Therefore, KE = 1/2×100×5× 5
= 50 × 25
KE= 1250joules
If you begin with 4.0 grams of hydrogen and all of the oxygen that you need, how many grams of water can you make?
the water is 36 grams.
hope this helped
Draw electron-dot structure of cyclohexane.*
Answer:
Draw the example below
Hope this helps
Hope it helps.
If you have any query, feel free to ask.
What is the mass of 500 mL of
1.0 M of H2O?
Answer:
In order to obtain a volume of
1 L
,
500 mL
of water must be added to the original solution of
500 L
.
Explanation:
Can you identify a sample from a living organism by examining it under a microscope? Yes or No
2Na3PO4 + 3CaCl2 --> 6NaCl + Ca3(PO) 2
This question is about metal oxides. When sodium is heated in oxygen, sodium oxide is produced.
Na + O2 ⟶ 2 Na2O
How many atoms of Na are required to balance this equation
Answer:
This is very easy Cuz We have 2Na2O We have O2 so thats molecule of Oxygen and its same on product We need to balance Na on start We have 1 on product We have 2 so Just put 2 at start....
Explanation:
Sorry for bad english not my first language :(
2Na+O2-->2Na20
I
A sample of gas has a volume of 606 mL at 35 °C. What temperature is necessary for the
gas to have a volume of 854 ml?
A 49 K
B. 707 K
C. 219 K
D. 434 K
Answer: D. 434 K
Explanation:
To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
where,
[tex]V_1\text{ and }T_1[/tex] are the initial volume and temperature of the gas.
[tex]V_2\text{ and }T_2[/tex] are the final volume and temperature of the gas.
We are given:
[tex]V_1=606ml\\T_1=35^oC=(35+273)K=308K\\V_2=854ml\\T_2=?[/tex]
Putting values in above equation, we get:
[tex]\frac{606}{308}=\frac{854}{T_2}\\\\T_2=434K[/tex]
Thus temperature necessary for the gas to have a volume of 854 ml is 434 K
Does volume alone determine whether an object will float or sink?
Answer:
no volume does not
Explanation:
Identify the daughter isotope in this nuclear reaction: Superscript 222 subscript 88 upper R a right arrow superscript 218 subscript 86 R n plus superscript 4 subscript 2 upper H e. Which is the daughter isotope? Superscript 218 subscript 86 R n. Superscript 4 subscript 2 upper H e. Superscript 222 subscript 88 upper R a.
The daughter isotope which is present in the given radioactive decay is ²¹⁸₈₆R.
What is daughter isotope?A daughter isotope is the isotope that remains following the radioactive decay of an original isotope.
In the question parent nuclei is given that ²²²₈₈R, and given chemical equation is:
²²²₈₈R → ²¹⁸₈₆R + ⁴₂He
In the above equation ²¹⁸₈₆R is the daughter nuclei and ⁴₂He is the emitted particle or rays.
Hence ²¹⁸₈₆R is the daughter isotope.
To know more about daughter isotope, visit the below link:
https://brainly.com/question/2192454
#SPJ2
Answer:
222 88Ra
Explanation: