Observe Record the appearance (colors,
textures, etc.) of the reactants in the data table.
The reactant Zn is
A. An element
B. An iconic compound
C. A molecule
D. An oxide
The reactant CuSO4 İs
A. An element
B. An iconic compound
C. A molecule
D. An oxide

Answer:

water vapour

Explanation:

allow the Earth’s surface

temperature was too/very hot

or water evaporated/ boiled

or turned to steam/gas

allow because of heat from

volcanoes

ignore the Earth’s surface

was covered by volcanoes

ignore water turned to water

vapour

[tex]\boxed{\sf Molarity=\dfrac{Moles}{Vol\:in\:L}}[/tex]

Moles of CaCO_3:-

Come to formula stated first

[tex]\\ \tt\Rrightarrow Volume=\dfrac{Moles}{Molarity}[/tex]

[tex]\\ \tt\Rrightarrow volume=\dfrac{0.008}{0.4}[/tex]

[tex]\\ \tt\Rrightarrow volume=0.02\ell=20m\ell[/tex]

Answer:

the first one would be 160 and the second 82 :)

Explanation:

Answer:

160 and 82?

Explanation:

80 plus itself is 160 and 80 plus 2 is 82 minus 0 is 82.

Answer:

the answer is Scene

Explanation:

because it is describing the atmosphere of where the book/play is taking place

Answer:

the answer is Scene

Explanation:

Answer:

A Golgi Body

B Vacuole

C Mitocondrian

D Nucleus

E Cell membrane

Explanation:

Answer:

the frequency is 18

Explanation:

please mark me as the branlest hope it helps please

Answer:

No.of copper atoms= no.of moles x No x atomicity

(No - avagardro's number )

= wt / atomic mass x No x 1

= 198 x 10 ^3 g / 63.5 x No

= 3.118 x 10^3 x 6.02 x 10^23

= 18.77 x 10^26 atoms.

Answer:

The answer is A. 0.7804 moles

Answer:

See explanation

Explanation:

According to the first law of thermodynamics, energy can neither be created nor destroyed, but can be transformed from one form to another.

The thermal energy observed in the hot air while the fire rages is obtained from the chemical energy stored in carbohydrates(cellulose) that compose the wood material. As the wood is burnt, this chemical energy stored in chemical bonds of the wood material is converted to heat. The chemical reaction in the combustion of wood can be simply modeled as the combustion of n moles of glucose.

nC6H12O6(s) + 6nO2(g) ===> 6nCO2(g) + 6nH2O(g)

Note that n may even be thousands of glucose molecules that combine to form cellulose present in wood.

Answer:

5 N.

Explanation:

We can calculate the net force on the object by using Newton's second law of motion:

F is the net force on an object

m is the mass of the object

a is its acceleration

For the object in this problem, we have

m = 1 kg is its mass

is its acceleration

Substituting into the equation, we find the net force:

Answer:

Explanation:

Distilled water has a pH of 7. Anything below that is acidic. One is very acidic. So a b and c cannot be the answer.

Lime is a base. That means that when it is put in water, the pH is going to be greater than 7,

The only possible answer is D

Answer:

The biggest thing in the universe is a supercluster known in the universe is the Hercules-Corona Borealis Great Wall.

Explanation:

Answer:

12 oxygen atoms

Explanation:

Multiply 3x4 and get 12 that's the easiest way I can explain it lol

Answer:

13.6 m/v

Explanation:

d=m/v

d=680/50

d=13.6

Answer:

what is the initial temperature? i can answer once I know. if it doesnt say, then I dont know and I'll delete this

Answer:

PVC,polythene,Bakelite

Explanation:

Eutrophication causes loss of biodiversity because many species need light to survive. It affects light penetration in the water body.

Eutrophication is a phenomenon where an aquatic environment (e.g., a lake) is enriched with minerals and nutrients.

The most common nutrients associated with eutrophication are nitrogen and phosphorus.

Eutrophication can severely affect light penetration in the water body, thereby affecting the survival of producer organisms (plants) and causing a loss of biodiversity across all trophic levels.

Learn more about Eutrophication here:

https://brainly.com/question/8499582

Answer: Electrons: 15 Atomic number :15

Explanation:

Answer:

2621.75 j heat is required to increase the temperature 25.5°C to 46°C.

Explanation:

Given data:

Mass of sample = 142.1 g

Initial temperature = 25.5°C

Final temperature = 46°C

Specific heat capacity of Al = 0.90 J/g.°C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 46°C - 25.5°C

ΔT = 20.5°C

Q = 142.1 × 0.90 J/g.°C × 20.5°C

Q = 2621.75 j

Thus,  2621.75 j heat is required to increase the temperature 25.5°C to 46°C.

Answer:

it releases energy

Explanation:

Answer:

It releases energy

Explanation:

The reactions involved in respiration are catabolic reactions, which break large molecules into smaller ones, releasing energy because weak high-energy bonds, in particular in molecular oxygen, are replaced by stronger bonds in the products.

Explanation:

Since Oxygen and Copper combine to form Copper Oxide. Therefore, this is a combination reaction

Hope this helps

Answer:

I think it is c.

Explanation:

the weight will increase

because Jupiter has a greater gravitational strength then earth, and the mass does not change wherever you go. So the only awnser that makes sense is c, Its weight will increase.

Please tell me if I'm right or wrong, thanks :)

Answer:

The hydrogenation of ethene

Ethene reacts with hydrogen in the presence of a finely divided nickel catalyst at a temperature of about 150°C. Ethane is produced. This is a fairly pointless reaction because ethene is a far more useful compound than ethane!

Explanation:

Answer:

Endothermic

Explanation:

Notice that heat is written as part of the reactants. Therefore, heat is necessary for the reaction to proceed.

In other words, the reaction is endothermic.

Conversely, if the heat is written as part of the products, heat is released as the reaction proceeds and hence the reaction is exothermic.

Answer:

2450000 gram

Explanation:

v= m × ρ= 1 cubic meter × 2.45 gram/cubic centimeter= 1000000 cubic centimeter × 2.45 gram/cubic centimeter= 2450000 gram

Explanation:

v=m over D

mass=20.oog

Density=2.45g

20.00-2.45

ans is 17.46

Answer:

a

Explanation:

the answer is a i'm pretty sure it might be wrong tho i'm sorry

In both cases, the precipitates were AgCl and PbI2 respectively.

A precipitate is a solid product obtained from the reaction of two aqueous phase species. Let us now consider the two reactions listed in the question;

We can see that in both cases, the precipitates were AgCl and PbI2 respectively.

Learn more about precipitates: https://brainly.com/question/24846690

Answer:

B and B

Explanation:

edge 2022

Answer:

Its A.) Polymers are macromolecules

Explanation:

Answer:

The correct answer that you are looking for is A.) Polymers are macromolecules.

Answer:

Explanation:

Carbon sink is basically anything that absorbs carbon from the atmosphere.   Particularly, the soil, trees, plants and the ocean absorb the most carbon, which helps with greenhouse emission.