Algae and other phytoplankton are the major producers of the earth's:

oxygen
carbon dioxide
hydrogen
nitrogen

Answer:

D.) The liquid or gas must circulate to move the heat

Explanation:

Answer:

2N

Explanation:

since they are going both sides you subtract

Answer:

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Answer:

D

Explanation:

i took the test

A reaction which is exothermic and results in an increase in the entropy of the system is said to be always spontaneous. A spontaneous reaction is one that produces heat. The correct option is D.

A process which has an urge or a natural tendency to occur under a given set of conditions is defined as the spontaneous process. Some of the spontaneous process need no initiation, they take by themselves. Dissolution of common salt in water, evaporation, etc. are examples.

Almost all spontaneous process are found to be exothermic. They release heat and warm up their surroundings. These reactions move towards the equilibrium with no need for an energy input from an external source.

Gibbs free energy is an important parameter to determine the spontaneity of a reaction. If the value of ΔG is negative, then the reaction will be spontaneous.

Thus the correct option is D.

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Answer:

c)

more hydronium ions than chloride ions

Answer:

24.64

Explanation:

Just took the test.

Answer: combustion reaction

[tex]C_{25}H_{52}+38O_2\rightarrow 25CO_2+26H_2O[/tex]

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equation is:

[tex]C_{25}H_{52}+38O_2\rightarrow 25CO_2+26H_2O[/tex]

The given reaction is a combustion reaction as in a combustion reaction , a susstaance is oxidized in the presence of oxygen to give carbon dioxide and water.

Answer:

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Answer:

Soil is a mixture of minerals, dead and living organisms (organic materials), air, and water.

Explanation:

Dead organisms decompose(kind of like fertilizer)

water comes from nearby watersheds, precipitation processes, etc.

Answer:

Soil is made up of three main components – minerals that come from rocks below or nearby, organic matter which is the remains of plants and animals that use the soil, and the living organisms that reside in the soil. The proportion of each of these is important in determining the type of soil that is present.

Answer:

3.6 moles

Explanation:

The balanced equation for the reaction is given below:

N₂ + 3H₂ —> 2NH₃

From the balanced equation above,

1 mole of N₂ reacted with 3 moles of H₂ to produce 2 moles NH₃.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above,

1 mole of N₂ reacted with 3 moles of H₂.

Therefore, 3.2 moles of N₂ will react with = 3.2 × 3 = 9.6 moles of H₂.

From the calculation made above, we can see that it will take a higher amount (i.e 9.6 moles) of H₂ than what was given (i.e 5.4 moles) to react completely with 3.2 moles of N₂.

Therefore, H₂ is the limiting reactant and N₂ is the excess reactant.

Finally, we the greatest quantity of ammonia, NH₃ produced from the reaction.

In this case, the limiting reactant will be use because all of it is consumed in the reaction.

The limiting reactant is H₂ and greatest quantity of ammonia, NH₃ produced can be obtained as follow:

From the balanced equation above,

3 moles of H₂ reacted to produce 2 moles NH₃.

Therefore, 5.4 of H₂ will react to produce = (5.4 × 2)/3 = 3.6 moles of NH₃

Thus, the greatest quantity of ammonia, NH₃ produced from the reaction is 3.6 moles

Answer: a. 249.5 g/mol

b. 1.996 g

c. Measure 1.996 g of [tex]CuSO_4.5H_2O[/tex] and dissolve in water until the volume is 400 ml

Explanation:

Molar mass is the sum of atomic masses of all the elements present.

Thus molar mass of [tex]CuSO_4.5H_2O[/tex] = 1(63.5)+1(32)+4(16)+5(18) = 249.5 g/mol

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

To calculate the number of moles for given molarity, we use the equation:

[tex]\text{Molarity of the solution}=\frac{\text{given mass of solute}\times 1000}{\text {Molar mass of solute}}\times \text{Volume of solution in ml}}[/tex]

[tex]0.02mol/L=\frac{x\times 1000}{249.5g/mol\times 400}[/tex]

[tex]x=1.996 g[/tex]

c. We need to measure 1.996 g of [tex]CuSO_4.5H_2O[/tex] and dissolve it in water to make the volume 400 ml.

The order in which the substances will reach 90.0°C is; Ag, Zn, Fe, Al.

The term specific heat capacity refers to the quantity of heat that is required to raise the temperature of an object by 1K. The higher the heat capacity, the greater the heat that is required for the object to reach 90.0°C.

The order in which the substances will reach 90.0°C is; Ag, Zn, Fe, Al. We can see that Ag has the lowest heat capacity and the first to reach 90° while All has the highest heat capacity and the last to reach 90°.

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Answer:

It has two sigma bonds ( the single bonds between each H and C) plus one pi bond and one sigma bond that consitute the double bond between C and O. It contains three covalent bonds, one . Hydrogen Bond Donor Count: 0: Computed by Cactvs 3.4.

Explanation:

Hope it helps you!

Answer:

1) KI

2) Mg3P2

3) Ag2S

4) FeBr3

5) Mg(OH)2

6) Na2SO4

7) Pb(NO3)4

8) (NH4)2CO3

Answer:

1. e

2. d

3. b

4. g

5. g, a both work

6. c

7. f

8. a, d both work

9. h

10. g

Explanation:

Answer:

No. of electrons of the element

Answer:

The key to understanding water's chemical behavior is its molecular structure. A water molecule consists of two hydrogen atoms bonded to an oxygen atom, and its overall structure is bent. This is because the oxygen atom, in addition to forming bonds with the hydrogen atoms, also carries two pairs of unshared electrons

Explanation:

Hope it helps

Answer:

Carbon dioxide is a greenhouse gas: a gas that absorbs heat. Warmed by sunlight, Earth’s land and ocean surfaces continuously radiate thermal infrared energy (heat). Unlike oxygen or nitrogen (which make up most of our atmosphere), greenhouse gases absorb that heat and release it gradually over time, like bricks in a fireplace after the fire goes out. Without this natural greenhouse effect, Earth’s average annual temperature would be below freezing instead of close to 60°F. But increases in g...

Explanation:

Answer:

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Explanation

The solution of sugar, salt etc in water.

Sublimation of substances like iodine, camphor etc into the air.

Hydrated salts, mercury in amalgamated zinc,

Alcohol in water, benzene in toluene

Answer:

the three parts are protons, neutrons, and electrons

Explanation:

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Answer:

39.948 u

Explanation:

Answer:

132.23007

Explanation: