4. Calculate The Heat Energy Needed To Heat 25.0 G Of Water From 13.0C To 18.0C. Use Chart Above For (2024)

Answer:

propane( organic compunds).

Answer: 3 - outer covering

Explanation:

What physical structure has spines that protect the plant from predators?

1)Flower

2)Pistil

3)Outer covering

4)Reproductive organs

Outer covering is the physical structure has spines that protect the plant from predators. Therefore, option C is correct.

What do you mean by the predators ?

Predators are living things that go for and kill prey. The term "prey" refers to the living things that predators eat. Both carnivores and omnivores may be predators. Predators include lions, tigers, sharks, and snakes.

Predation can be classified into four categories: carnivory, herbivory, parasitism, and mutualism. Depending on whether the victim dies, each sort of predation may be classed.

Plants are shielded against parasite invasion by their epidermis. It creates an external covering for plant organs that are constantly in contact with the outside world. This epidermis is further protected by a cuticle, which is a layer of fatty material.

Thus, option C is correct.

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Answer:

Sodium hydroxide us formed during the electrolysis of sodium chloride solution.

Explanation:

During electrolysis, hydrogen and chloride ions are removed from the solution, whereas sodium and hydroxide ions are left behind in solution.

Hope this helped

Answer:

Diazanium sulfate is the correct answer.

Explanation:

Hope this helped Mark BRAINLIEST!!

Answer:

scientists are uncertain of how long the resources will last.

Explanation:

It is hard to estimate how long certain natural resources will last because they are dependent upon the rate of consumption and other factors. There are many fields of studies going into alternative energy. Since the technology needed for some of these ideas will take time to be developed, alternative sources of energy must be found before the resources we already have run out.

Answer: A. scientists are uncertain of how long the resources will last.

Explanation:

We are looking into many other types such as: Solar, Nuclear, Water, Etc.

Answer:

You should be posting this question under the biology tab, but here's the answer nonetheless.

a. 25% (if the woman is Ce)

c. 0% (if the woman isn't Ce)

Answer:

the answer is Fragrent compounds

Answer:

balanced equation mole ratio 5 2 mol NO/1 mol O2

10.00 g O2 3 1 mol O2/32.00 g O2 5 0.3125 mol O2

20.00 g NO 3 1 mol NO/30.01 g NO 5 0.6664 mol NO

actual mole ratio 5 0.6664 mol NO/0.3125 mol O2 5 2.132 mol NO/1.000 mol O2

Because the actual mole ratio of NO:O2 is larger than the balanced equation mole

ratio of NO:O2, there is an excess of NO; O2 is the limiting reactant.

Mass of NO used 5 0.3125 mol O2 3 2 mol NO/1 mol O2 5 0.6250 mol NO

0.6250 mol NO 3 30.01 g NO/1 mol NO 5 18.76 g NO

Mass of NO2 produced 5 0.6250 mol NO2 3 46.01 g NO2/1 mol NO2 5 28.76 g NO2

Excess NO 5 20.00 g NO 2 18.76 g NO 5 1.24 g N

Explanation:

Answer:

B.) One oceanic plate converging with one continental plate.

HOPE THIS HELPS!

Answer:

C: Two tectonic plates transforming

Answer:

https://www.bbc.co.uk/bitesize/guides/zpykxsg/revision/3 (i know ppl hate it when you put links but i actually think this may explain it)

Explanation:

Answer:

B: 3k+ + 3OH¯ + Fe3+ + 3KOH = Fe3(H) + + 3NO3¯

Explanation:

Potassium hydroxide (KOH) reacts with iron (III).

The normal balanced equation is;

Fe(NO3)3 + 3KOH = Fe(OH)3 + 3KNO3

Now the ionic equation will be;

3k+ + 3OH¯ + Fe3+ + 3KOH = Fe3(H) + + 3NO3¯

Answer:

I think it’s the first one, holly ferns sorry if I’m wrong!

Answer:

0.44316859040048207mol

Explanation:

Answer:

3.2M HCl Solution

Explanation:

Molarity = moles of solute / volume of solution expressed in liters

moles of solute = 0.80 moles HCl

volume of solution = 250 ml = 0.250 Liter

Molarity (M) = 0.80 moles HCl / 0.250 Liters = 3.2M HCl Solution

228 packages

8000 / 35 = 228.57 —> You want to round down in this context, because 229 packages would exceed the weight limit.

Answer:

O butterflies resting on the flower of a plant

Answer:

The answer is butterflies resting on the flower of a plant.

Explanation:

Answer:

Yttrium, Carbon, Iodine

Explanation:

Y stands for Yttrium

C stands for Carbon

I stands for Iodine

and 3 stands for 3 Iodine atoms

Answer:

Putting fire below them

Explanation:

Fire is a method used for burning stuff faster as the heat transforms into energy

Answer:

-217 kJ

Explanation:

ΔH = reactant energy - product energy

ΔH = [(C-H) × 2 + (C≡C)] + [2 × H-I] - [(I-C) × 2 + (C-H) × 4 + (C-C)]

ΔH = [ (413 × 2 ) + 839 + 2(299)] - [(240 × 2) + (413 × 4) + 348]

ΔH = [826 +839 + 598] - [ 480 +1652 + 348]

∴ ΔH = -217

Answer: mass m = M·c·V

Explanation: M(CaCl2) = 110.98 g/mol, c= 0.15 mol/l,

n=m/M= cV, volume of Solution is not mentioned

Answer: Volume of the gas at STP is 22.53 L.

Explanation:

Given : Volume = 125 mL (as 1 mL = 0.001 L) = 0.125 L

Temperature = [tex]70^{o}C = (70 + 273) K = 343 K[/tex]

Pressure = [tex]125 kPa = 125 kPa \times \frac{0.01 atm}{1 kPa} = 1.25 atm[/tex]

According to the ideal gas equation, the volume of given nitrogen gas is calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

[tex]1.25 atm \times V = 1 mol \times 0.0821 L atm/mol K \times 343 K\\V = \frac{1 mol \times 0.0821 L atm/mol K \times 343 K}{1.25 atm}\\= \frac{28.1603}{1.25} L\\= 22.53 L[/tex]

Hence, volume of the gas at STP is 22.53 L.

Answer:

Amphoteric oxide is an oxide that reacts with both acids and bases. In other words, it possesses both acidic and basic properties. For example both zinc and aluminium are metals but their oxides, ZnO and Al2O3 are amphoteric oxides as they react with both acids and bases.

Explanation:

[tex]\huge{\mathbb{\tt {QUESTION:}}}[/tex]

What makes a radioactive decay chain end?

OA. The final element has the longest half-life.

OB. All mass has been converted to energy.

OC. The radiation is absorbed by something.

OD. The final product is not radioactive.

[tex]\huge{\mathbb{\tt {ANSWER:}}}[/tex]

D. The final product is not radioactive

[tex]\huge{\mathbb{\tt {EXPLANATION:}}}[/tex]

A radioactive decay chain will end when the last particle formed is stable. The initial radioactive isotope is called the parent isotope.

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→X x K i m 0 2 x X

A decay chain will end only when the final product is not radioactive.

What is radioactivity?

The term radioactivity has to do with the sponteanous disintegration of an atom with the emission of radiation. Usually, there are radioactive decay series for different isotopes.

A radioactive decay series will continue untill a stable isotope is formed hence, a decay chain will end only when the final product is not radioactive.

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Answer:

It represents a decomposition reaction because one reactant breaks apart and forms two products

Explanation:

Your welcome

To solve such this we must know the concept of redox reaction. Therefore, the correct option is option C. It represents a decomposition reaction because one reactant breaks apart and forms two products.

What is chemical reaction?

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

Decomposition reaction is a chemical reaction where one reactant breaks down into two or more than two products on supplying energy in form of heat or electricity.

Therefore, the correct option is option C. It represents a decomposition reaction because one reactant breaks apart and forms two products.

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Answer:

The total mass will be same of both side!!!!! ig so

Answer: I go search some information

Explanation:I come back with a answer

Answer:

Anthocyanins are used in organic solar cells because of their strong light harvesting, and their ability to convert this light energy into electrical energy.

Explanation:

Solar panels plug you into the sun by absorbing solar energy with photovoltaic (PV) cells. When hit with sunlight, they generate electricity which then flows into a device called an inverter which converts the electricity into a form (120 volts, 60Hz) for household use.

Answer:

"Electron binding energy, more commonly known as ionization energy, is a measure of the energy required to free an electron from its atomic orbital or from a solid. ... The atomic binding energy of the atom is the energy required to disassemble an atom into free electrons and a nucleus."

Explanation:

Hope this helps! <33

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have a wonderful day!

Binding energy is a required amount of energy that disperses the other particles of the reaction system. It measures the energy needed to free an electron or a subatomic particle.

What is binding energy?

Binding energy is the ionization energy that depicts how much energy will be needed if an electron has to be removed from an atom for a reaction to occur.

It can be said that the energy required to free an electron from the orbit of the atom is measured in electron volt (eV). It is a little different from ionization energy as binding energy can remove any subatomic particle and not just an electron.

Therefore, the binding energy measures the freed subatomic particle.

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