Answer: this question is 3 days ago? Omg
10g of water will freeze at "32c" what temperature would 20g of water freeze
Answer:
20g of water would freeze at the Same temperature
Worksheet: Balancing Equations
I. Fill in the blanks with the most appropriate term:
A ________________ ________________ tells the story of a chemical reaction. ________________ are the starting substances in the reaction while ________________ are the new substances that are formed. The large numbers in front of some of the formulas are called ________________. These numbers are used to ________________ the equation because chemical reactions must obey the Law of ________________ of Matter. The number of atoms of each element on both sides of the equation must be ________________ because matter
cannot be ________________ or ________________. When balancing equations, the only numbers that can be changed are ________________; remember that ________________ must never be changed in order to balance an equation.
II. Balance the following equations:
1. Al + O2 Al2O3
2. C3H8 + O2 CO2 + H2O
3. P4 + O2 P2O3
4. KNO3 KNO2 + O2
5. O2 + CS2 CO2 + SO2
6. KClO3 KCl + O2
7. N2 + H2 NH3
8. NaF + Br2 NaBr + F2
9. Al + HCl H +AlCl3
10. WO3 + H2 W + H2O
Answer:
1. Chemical Equation 2. Reactants 3. Products 4. Coefficients 5. Balance 6. Conservation 7. Equal 8. Created 9. Destroyed 10. Coefficients 11. Subscripts
Explanation:
A balanced equation obeys the law of conservation of mass. The mass of the reactants and products are equal on both sides of the equation.
What is a balanced equation?A chemical equation in which the number of atoms of reactants and products on both sides of the equation are equal is defined as the balanced chemical equation. The numbers which are used to balance the chemical equation are called the coefficients.
The coefficients are the numbers which are added in front of the formulas. According to law of conservation of mass, the mass can neither be created nor be destroyed. It can be transformed from one form to another.
In other words, the mass and charge are balanced on both sides of the reaction.
The balanced equation for the reaction is:
4Al (s) + 3O₂ (g) → 2Al₂O₃ (s)
Here the number of 'Al' and 'O' atoms are balanced.
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In a ___________ reaction, an acid and a base produce a salt and a water.
a. Decomposition
b. Neutralization
c. Synthesis
d. Concentrated
I NEED HELP ASAP!!!
A sample of ice undergoes a physical change by being melted in a beaker. The ice cube had a mass of 30 grams. What will be the mass of the liquid water? How did you determine this?
Answer:
it would still be 30 grams.
Explanation:
it would still be 30 grams because you are not adding any more water to the beaker and you are not taking any of the melted water away
What would happen if a cell membrane let too much water into a cell?
Answer:
Animal Cell
When water moves into an animal cell (e.g. a red blood cell), the cell membrane stretches and the cell gets bigger. If this continues, the cell membrane will burst – this is called lysis.Plant Cell
When too much water moves out of a plant cell the cell contents shrink. This pulls the cell membrane away from the cell wall. A plasmolyzed cell is unlikely to survive.According to the video, what qualities do Chemists need? Check all that apply. curiosity ability to focus on details ability to lift heavy objects negotiation skills friendly attitude painstaking follow-through
Curiosity, Ability to focus on detail, and Painstaking follow-throw.
Easy Answers.
The qualities do Chemists need is to be considered as the curiosity. ability to focus on details, and painstaking follow-through.
Qualities of Chemists:The person should have patience. he has flexible nature. Also, he should be curious in nature. Moreover, they should have the capability for focussing on details.hence, The qualities do Chemists need is to be considered as the curiosity. ability to focus on details, and painstaking follow-through.
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have more points because i dont care
Answer:
????
Explanation:
Answer:KK thanks
Explanation:fun fact:greeks loved gays like anyone who was gay recieved so much help from the government that being gay in ancient greece was so common
When an apple falls from a tree, when does gravity act on the apple?
Please help me out with this stuff please
Answer:
You have to do some of these yourself we cant do all the pages. You have to make sure to extend your knowledge :)
Explanation:
If you compare a long wavelength with a short wavelength, which one should have a higher frequency? Why?
Which of the following is an example of chemical energy?
a hot metal pan
an apple
turning on the TV
a roller coaster rolling down
HELP PLZ
Answer:
turning the tv
Explanation:
In a __________________ reaction, elements are not changed, just rearranged. Small amounts of energy take place.
a. Endothermic
b. Exothermic
c. Nuclear
d. Chemical
Why do you think the Na+ ion is smaller than a neutral Na atom? Why do you think the Cl - ion is larger than a neutral Cl atom?
Answer:
Na+ ion is smaller than a neutral Na atom in the ion there was one more proton which will attract electron bring it closer to the center making the atomic radius smaller. Therefore making a Na+ ion is smaller than a neutral Na atom Explanation:
yes
Which option correctly identifies the pure substance or substances? a. diamond b. salt
A. a
B. a and b
C. b and c
D. all of them
I think the correct answers are A and B
Definition: The different layers of gases that extend from the surface of the Earth into space.
Example: troposphere, stratosphere, mesosphere, thermosphere
Term: Type term here
(SC.6.E.7.1.) Radiation
Answer:
Exosphere because I know and it has the prefix ex which means out of (example:exterior)
Answer:
Atmosphere
Explanation:
These all are layers of atmosphere.
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plz help on last question i asked
Help PLEASE!! Will mark brainly Calculate the total energy in 1.5 x 10^13 photons of gamma radiation having wavelength = 3.0 x 10^-12 m. Need to show ALL work.
Answer:
The total energy but the photons will give is 6.615 x 10^-14
Explanation:
Formula that can be used in this question is E= hf or E= hc/ λ
This is the formula that can be used to calculate the energy that the photon is carrying where it is given as the Planck's Constant .
Now putting the values given in the equation that can calculate energy we get Planck's Constant is equal to 6.62 x 10^-34
E=(6.62 x 10^-34 x 2.998 x 10^8) / ( 3 x 10^-12 )
E=6.615 x 10^-14
Answer:
The total energy but the photons will give is 6.615 x 10^-14
Explanation:
Write a summary of some key ideas about chemical reactions.
Please!
I have to pass science to be able to get my nails done professionally!!!
I WILL MARK BRAINLIEST!!!!
Answer:
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Reactants are the starting materials, while products are the end result of the reaction. All chemical reactions are accompanied by a change in entropy.
In general, chemical reactions can be classified as either redox reactions or non-redox reactions. In redox reactions, there is a transfer of electrons between reactants. In non-redox reactions, there is no electron transfer. All exothermic reactions are redox reactions, while endothermic reactions may be either redox or non-redox.
Explanation:
Hope this helps!
Quickly answer please I’ll give you 25 points
Which event would most likely lead to a thunderstorm?
A. A warm, dry air mass moving over a cold air mass
B. A cold, dry air mass moving over a warm air mass
C. A cold, moist air mass moving over a warm air mass
D. A warm, moist air mass moving over a cold air mass
Answer:
A. A warm, dry air mass moving over a cold air mass
Explanation:
A squirrel and an oak tree are both examples of individual:
Genes
Organism
Cells
Ecosystems
Other:
Answer:
it's b:organism
Explanation:
Answer:
A squirrel and an oak tree are both examples of individual organisms
Hope I Helped You!!!
The Brahman cattle have good resistance to high temperature, but its meat is poor and tough to eat. The English shorthorn cattle, on the other hand, have good meat, but poor resistance to high temperatures. Farmers formed the Santa Gertrudis cattle by breeding Brahmans with English shorthorns. This new type of cattle has good meat and resistance to high temperatures. Which of the following best describes the process used to produce the Santa Gertrudis cattle?
A.
genetic engineering
B.
inbreeding
C.
natural selection
D.
selective breeding
Answer:
d
Explanation:
Which of the following would most likely form an ionic bond?
A) Br and Cl
B) O and Cl
C) H and Cl
D) Na and Cl
PLEASE HELPP
A student fills four containers with 20 ml of water and places them in four different locations.
One is placed in a sunny window, one is placed underneath a heat lamp, one is placed on a
student desk, and another is placed in a dark cabinet. The student plans to collect evaporation
data over a period of one week. Which prediction will best match the actual results?
Answer:
a heat lamp
Explanation:
Answer:
The one under the heat lamp is most effective
Explanation:
The heat is making the water warm and will soon evaporate
Where does energy for all living things come from FIRST
Answer:
The Sun is the major source of energy for organisms and the ecosystems.
Explanation:
The bobsled is an event in the winter Olympics. In this event, each sled and its riders speed down an icy track. Which factor(s) affect how much kinetic energy the sled and its team have when the sled crosses the finish line?
A mass only
B speed and time
C speed and mass
D speed, mass, and time
Answer:
Speed and Mass
The factor affecting how much kinetic energy the sled and its team have when the sled crosses the finish line is speed and mass. The correct option is C.
What is kinetic energy?Kinetic energy refers to the energy that an artifact or particle has as a result of its motion.
When work, which transfers the heat, is performed on an object by trying to apply a resultant force, the object accelerates and gains kinetic energy.
Kinetic energy is indeed the energy of a moving body, so it is the energy of all objects moving.
It is one of the two major types of energy, the other being potential energy, which is the energy that is stored within objects at rest.
The amount of kinetic energy a moving object has is determined by two factors: mass and speed.
Thus, the correct option is C.
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Answer please 10 points
Answer:
water
Explanation:
Answer:
Water
Explanation:
Most of the Earth is covered with water, so water is the substance.(H20)
Why does the sun appear to be the brightest star in the sky?
A. It burns more gas, making it brighter than any other star.
B. It is the largest star in the galaxy, so it is the brightest star
C .Its relative distance to Earth is closer than the other stars.
Answer:
C. it's relative distance to earth is closer than the other stars
Match the vocabulary word to the definition. Question 1 options:
not easily changed?
A. an attraction between two or more atoms resulting in the formation of different chemical substances?
B. A chemical bond that involves sharing a pair of electrons between atoms in a molecule?
C. electrons in the outermost shell?
D. Formed when one or more electrons are transferred from one atom to another?
1. stable 2. chemical bonding 3. valence electrons 4. ionic bond 5. covalent bond
Answer:
a
Explanation:
this is my third time asking this,,, HELPPPPPP PLZZZz i'll mark brainliest! Infrared (IR) and ultraviolet (UV) light. But above 29°C, the coating on the glass undergoes a chemical change, causing it to block IR light. What happens to the IR light?
Answer:it would not cause any effect because its blocking it. Basically u could say that what would happen is that no effect was happening cuz of the blocking.
Explanation:
Please helppp with this question
Answer:
c
Explanation:
hope this help
at least two examples
of Chemical Formula
Explanation:
Rotting, withering, heat and light emission, precipitate formation, gas evolution, or a change of appearance.
Answer:
h20 (water duh)
C9H13N (Amphetamine)
C6h1206 (glucose)