Answers
Answer:
Steam escapes from a teapot. Is a chemical reaction occurring? No, because liquid to gas would be a physical change, not a chemical change
Explanation:
Related Questions
what kind of change is heating of mercuric oxide?
Answers
Answer:
Chemical change.
Explanation:
When it is heated it decomposes into mercury and oxygen gas. The mercury oxide reactant becomes the silver color of mercury. Hence, a color change can be noticed throughout the reaction.
Answer:
chemical change
Explanation:
The process plants use to make sugar for food
Answers
Answer:
PHOTOSYNTHESIS!
Explanation:
Differentiate between molecule and mole.
Answers
Answer:
Explanation:
A molecule, for example of water, contains 2 hydrogen atoms and 1 oxygen atom chemically bonded together and is the smallest building block of the chemical water. ... A mole is a certain quantity of molecules, specifically 6.02 x 10^23.
Hope this helps!
how many mililiters is 0.55 L
Answers
Answer:
It's 550 milliliters.
Explanation:
I hope this helps.
Will mark brainliest. Anyone willing to do this?
Answers
Answer:
ACTIVITY 1
Sample 1 has a stronger taste of lemon, and is more sour.
Sample 2 has a sweeter taste, my guess is because there's more sugar:lemon juice ratio.
atoms, predict the ratio of metal cationic (+) atom
to nonmetal anionic (-) atom in the compound.
Lithium 1s22s1
Chlorine 1s22s22p6 3s23p5
A. 1:1
B. 1:2
C. 2:1
D. 3:1
D. 3:1
Answers
Answer:
A. 1:1
Explanation:
Lithium 1s2 2s1
Chlorine 1s2 2s2 2p6 3s2 3p5
Lithium is a group 1 element. When it forms a compound, it loses it's one valence (outermost) electron.
Chlorine is a group 7 element. When it forms a compound, it gains one electron to achieve a stable electronic configuration.
Since Li loses one electron and Cl gains one electron. The formular of the compound formed would be;
LiCl
The correct option is;
A. 1:1
Which characteristic describes the traposphere
Answers
Answer:
It is the wettest layer of the atmosphere.It extends upto 10km upward from sea level.
Escucho activamente a mis compañeros y compañeras, reconozco otros puntos de vista, los comparo con los míos y puedo modificar lo que pienso ante argumentos más sólidos.
Answers
Answer:
Explanation:
Vale, y entonces que ahora???
3. How many moles of KCl is produced according to the chemical reaction?
2KCIO3(s) -------> 2KCI(s) + 302(g) M
Answers
Answer:
the answer should be: 12.00 Mol KCIO³ × 3 Mol 0² divided by 2 mol KCIO³ = 18.00 mol 0²
Which processes occur when energy is removed from a substance
Answers
Answer:
Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.
Name the most abundant compound found in air?
Answers
Answer:
The two most abundant compounds in air are the gases carbon dioxide, CO2, and water vapor, H2O
Answer:
Nitrogen
Explanation:
Nitrogen is the most abundant compound found in the air. It accounts for about 78% of the air that we breath. It is closely followed by oxygen that accounts for about 21% of the air.
BRAINIEST PLS HELPP
Answers
Answer:
0.179kg/m3 hope that helps you out
Imagine disease kills 85 percent of the wolf population. How will it affect the other organisms?
Answers
Answer:
There would most likely be an overpopulation of the animals the wolfs ate.
Explanation:
Answer:
Many populations will grow way to much. Also others will drop in numbers drastically.
Explanation:
Due to the fact that wolves are predators, the prey they eat will grow 85% more. Now, 85% of the wolf population dies, that`s a lot of prey not eaten. Then the prey that are predators to other animals who are over hunted by their predators will most likely drop in numbers drastically, by I mean 85%. This will throw the ecosystem off so much, humans could be at grave risk.
A bond between two iodine atoms would have what as the percent ionic character
A. 53%
B. 83%
C. 0%
D. impossible to calculate
Answers
Answer:
Your answer should be 53%
I'm very sorry if I'm wrong I have not done this in forever
Explanation:
No explanation
how does a drupe fruit differ from a hesperidum fruit.
Answers
Answer:
hi
Explanation:
Answer:
Fleshy Fruits: All of most of the ovary wall (pericarp) is soft or fleshy at maturity. ... partitions, juicy seed vesicles, and a leathery exocarp similar to a hesperidium. ... This is a very common dry fruit found in many different plant families.
Explanation:
Intermolecular forces and Kinetic energy together help determine whether a substance will
be a solid, liquid, or a gas
True or false
Answers
Answer:
true
Explanation:
How many moles are in 1.6g HCl ?
Answers
Answer:
0.0438825768068512
Explanation:
use a calculator online, you wont have to wait
If u have 10 moles of C2H2 how many mole of O2 would you need
Answers
Answer:
i dont know04487448700
The charge of the atom is _______ because there are ______ numbers of and______ in an atom.
Answers
Answer:
see below
Explanation:
the charge of the atom is neutral because there are equal numbers of protons and electrons in an atom.
hope this helps
please mark
someone help me on this one pls
Answers
Answer:
i believe it is mass and distance
Explanation:
i hope that was correct, good luck by the way.
Answer:
I think it's mass and distance
What is the chemical formula for Fluorine trisulfide ?
Answers
Answer:
F2O8S3
Explanation:
What are two functions of dermal tissue in plants?
A.Control the entry and exit of water
B.Cover the outside of plants
C.Contain cells that connect to form pipes
D.Transport water and food
Answers
Answer:
A and B
Explanation: Dermal tissue functions to protect the plant from injury and water loss.
What is the purpose of the stairstep pattern on the periodic table of the elements?
Answers
Answer: The bold staircase in the periodic table allows us to classify which elements are metalloids.
Explanation: Additionally, it acts like a "divider" that allows us to properly distinguish the metals from the non-metals in the periodic table.
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b) Write a few paragraphs describing the chemical reaction and explaining the energy change in the reaction. Your document should: i. identify the reactants and products. ii. describe the change in energy that occurs as bonds are broken and formed. iii. identify how the potential energy of the reactants compares to the potential energy of the products. iv. state and explain the net change in enthalpy. v. identify whether the reaction is endothermic or exothermic. vi. explain how energy is conserved between the reaction and the surrounding environment.
Answers
Answer:
The energy change in a chemical reaction is due to the difference in the amounts of stored chemical energy between the products and the reactants. This stored chemical energy, or heat content, of the system is known as its enthalpy.
Explanation:
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Answer:
here is what i put for this project:
The reaction in this project is exothermic. The energy change in a chemical reaction is due to the difference in the amounts of stored chemical energy between the products and the reactants. This stored chemical energy, or heat content, of the system is known as its enthalpy. The potential energy in reactants is higher than the potential energy of products in an exothermic reaction. Since energy is given off, the products are lower in energy than the reactants. The energy that is given off is a result of the formation of new bonds.
The change of the enthalpy happening in the chemical reaction is different from the pathway in between the initial and the final states. The addition of the equation gives the net change of the enthalpy. Enthalpy change is the amount of heat evolved or absorbed in the reaction under constant pressure. This can be calculated by checking the amount of heat evolved during the reaction. This reaction occurs at a constant pressure.
Question 5 of 10
What kind of land feature is shown at point on this topographic map?
A. Alake
B. A gentle slope
C. A mountaintop
D. A steep slope
Answers
Answer:A
Explanation:
gentle slope
Suppose you were to make 36 grilled cheese sandwiches, how many pieces of bread do you need? show your work
Answers
you need to times 36 times 2
the ANWSER would be 72 :)
Use the following terms in the same sentence chemical reaction and precipitate
Answers
Answer: Precipitate is a sign that a chemical reaction has occurred.
how many grams of NH3 are in 45.9
Answers
How do scientists think?
Answers
Answer:
hmmm
Explanation:
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How does a material get a negative charge?
Answers
Explanation:
When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. The material that gains electrons becomes negatively charged. The material that loses electrons is left with a positive charge.