Order these elements from LEAST to GREATEST atomic mass.
A) Li, He N.S
B) He, Li, N, S
C) N, He, Li, s
D) S, N, Li, Hs

Answer:

C. 12.5 m/s

Explanation:

h = h(0) - gt²/2

0 m = 8 m - 9.8 m/s²*t²/2

- 8 m = - 9.8 m/s²*t²/2

16 m = 9.8 m/s² * t²

t² = 16/9.8 s²

t = √(16/9.8) s

v = v(0) + gt

v = 0 +gt

v = 9.8 m/s² * √(16/9.8) s ≈ 12.5 m/s

Answer:

35ml

Explanation:

please give brainliest

Answer:

B

Explanation:

I did the test

Answer:

The list is limited to 20 most important contributors or, if less, a number sufficient to account for 90% of the provenance. The listed Reaction acts as a link to the relevant references for the measurement. The Measured Quantity is normaly given in the original units; in cases where we have reinterpreted the original measurement, the listed value may differ from that given by the authors. The quoted uncertainty is the a priori uncertainty used as input when constructing the initial Thermochemical Network, and corresponds either to the value proposed by the original authors or to our estimate; if an additional multiplier is given in parentheses immediately after the prior uncertainty, it corresponds to the factor by which the prior uncertainty needed to be multiplied during the ATcT analysis in order to make that particular measurement consistent with the prevailing knowledge contained in the Thermochemical Network.

Explanation:

According to the given balanced equation:

We want to calculate the mass of products when certain amounts of reactants react. This is a stoichiometry problem.

Stoichiometry refers to the relationship between the quantities of reactants and products before, during, and following chemical reactions.

Let's consider the following balanced equation.

2 Al(s) + Fe₂O₃(s) → Al₂O₃(s) + 2 Fe(l)

a) Calculate the mass of Al₂O₃ formed when 4.1 g of Al completely reacts.

The mass ratio of Al to Al₂O₃ is 53.96:101.96.

4.1 g Al × 101.96 g Al₂O₃/53.96 g Al = 7.7 g Al₂O₃

b) Calculate the mass of Fe formed when 4.1 g Al completely reacts.

The mass ratio of Al to Fe is 53.96:111.70.

4.1 g Al × 111.70 g Fe/53.96 g Al = 8.5 g Fe

c) Calculate the mass of Fe formed when 4.1 g Fe₂O₃ completely reacts.

The mass ratio of Fe₂O₃ to Fe is 159.69:111.70.

4.1 g Fe₂O₃ × 111.70 g Fe/159.69 g Fe₂O₃ = 2.9 g Fe

According to the given balanced equation:

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Given what we know, we can confirm that the one property listed that is universal for all of the electromagnetic waves listed is that they all move at the same speed in a vacuum.

These are a specific type of wave. These waves are the result of interactions between an electric field and a magnetic field. These waves have many properties and can be of many distinct types, however, one universal property of these waves is that all of them will move at the same speed whilst in a vacuum.

Therefore, we can confirm that the one property listed that is universal for all of the electromagnetic waves listed is that they all move at the same speed in a vacuum.

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Answer:

a) equivalence point

b) direct titration

c) primary standard

d) titrand

e) Back titration

f) back titration

g) standard solution

h) standard solution

I) indirect titration

j) end point

Explanation:

A volumetric analysis is one in which a solution of unknown concentration is determined from its volume. This is commonly referred to as titration.

In titration, a standard solution is reacted with another solution of unknown concentration. The point at which the concentration of the standard solution is equal to that of the analyte is known as the equivalence point (usually indicated by a colour change). An indicator may be added to the analyte solution to help identify when the reaction is complete.

Based on the effect of temperature on reaction rate, to make the strongest possible solution of ammonia, it is best to use hot water.

The rate of a chemical reaction is increases with increase in temperature.

This increase in rate of reaction is observed because the number of particles with energy greater than or equal to the activation energy increases.

Therefore, to make the strongest possible solution of ammonia, it is best to use hot water.

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Answer:

1) Filter the mixture, Sand will remain on the filter paper. 2) Then pour the mixture of mustard oil and in separating funnel. Water will settle down at bottom and mustard oil will float on it. Then open the stopcock of the separating funnel and pour out the lower layer of water.

Explanation:

Answer:

you gotta rotate it 90 degrees and get that screen fixed

Explanation:

The statement that are true about dilution are:

Dilution of a solution is the process by which more solvent that makes up a solution is added to the solution to decrease it's concentration.

The properties of a solution that is diluted include the following:

In dilution, the amount of solute does not change, the number of moles are the same before and after dilution.

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Answer:

[tex]2.82x10^{23}molecules[/tex]

Explanation:

Hello.

In this case, given the volume (1cm³=1mL) and density of the bromine we are to firstly compute the mass since it will allow us to compute the representative particles:

[tex]\rho =\frac{m}{V}[/tex]

[tex]m=\rho *V=3.12g/cm^3*24.0cm^3\\\\m=74.88gBr_2[/tex]

Next, since the mass of one mole of diatomic bromine is 159.82 g (one bromine weights 78.91), we can next compute the moles in that sample:

[tex]n=74.88g*\frac{1mol}{159.82g} =0.469molBr_2[/tex]

Finally, via the Avogadro's number we can compute the representative particles of bromine as follows:

[tex]particles=0.469mol*\frac{6.022x10^{23}molecules}{1mol}\\ \\2.82x10^{23}molecules[/tex]

Best regards.

Answer:

ill try

Explanation:

Answer:

Hi...... I have this same question............

Biologists and other scientists use the scientific method to ask questions about. When possible, scientists test their hypotheses using controlled experiments. Test a hypothesis by making predictions about patterns that should be seen in. This variable is independent because it does not depend on what happens in the.

Explanation:

Answer:

.75 meter north

Explanation:

v = d/t

v = 15/20

v = .75

bro is that genius cast that's an easy line

I can easily draw that

Answer:

522

Explanation:

9 time 8 is 72, 7 carryover on 5 and 9 times 5 is 45 plus 7 carry over which is equal to 52. Therefore answer becomes 522.

Answer:

The answer is B

Explanation:

The area surrounding the nucleus is called the electron cloud which holds the electrons, so with the power of deduction its B. 0-0

Explanation:

the formula of combined gas law = PV/T

:• PV/T = K

K is constant

Answer:

The answer is Near The Ocean Ridges.

Answer:

2835J

Explanation:

Q = mcΔT

Given,

Q = 45 × 4.2 × 15

Q = 2835 J

Answer:

2.33 g H20

Explanation:

12.1 grams of water are produced when 5.38g of O₂ is reacted.

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Mass of oxygen = 5.38g

Moles = mass / molar mass

Moles of oxygen = 5.38 / 16

                             = 0.34 moles

From the reaction,                      2H₂ + O₂ = 2 H₂O

1 mole of oxygen gives 2 moles of water.

Thus, 0.34 moles of oxygen will give 2 × 0.34 moles

                                                 = 0.67 moles of water.

Mass of water = moles × molar mass

                    = 0.67 × 18

                    = 12.1 g of water

Therefore, 12.1 grams of water are produced when 5.38g of O₂ is reacted.

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Explanation:

1) Find the reaction quotient:

Qc = [I]² / [I₂]

Plug in the Kc value and the I₂ concentration.

Q = [2.0×10⁻⁸]² / (0.020)

Q = 2.0×10⁻¹⁴

Since Qc < Kc, the reaction moves to the right (favors the products).

2) Find the reaction quotient:

Qc = [CO₂] [H₂] / ([CO] [H₂O])

Qc = (15) (15) / ((1.0) (1.0))

Qc = 225

Since Qc > Kc, the reaction moves to the left (favors the reactants).

Answer:

thermal; coolant

Explanation:

A refrigerator transfers thermal energy from the cool air inside the refrigerator to the warm air in the kitchen. I hope this helps! ^-^

Answer:

Salts of Weak Acids and Strong Bases are slightly basic with a pH of greater than 7 . For Example: NaOH (Sodium Hydroxide) , a strong base , when reacted with a weak acid , H 2 CO 3 (Carbonic acid) , gives a basic salt Na 2 CO 3 (Sodium Carbonate) which has a pH of higher than 7.

hope this helps

The convergence of two oceanic plates can give rise to deep sea trenches, island arcs, and tall folded mountains, each of which is a distinctive geological feature resulting from the complex interplay of subduction, volcanic activity, and crustal compression. options A,C and D are correct.

When two oceanic plates converge, several geological features can develop as a result of the collision. One common feature is the formation of deep sea trenches. As the denser oceanic plate subducts beneath the other plate, it creates a deep trench in the ocean floor. The subduction process leads to the downward bending of the oceanic plate, forming a trench that can extend for hundreds or thousands of kilometers.

Another feature that can develop is the formation of island arcs. As the subducting oceanic plate sinks into the mantle, it releases water and volatiles, which cause the overlying mantle to melt. This molten material rises through the Earth's crust, creating a chain of volcanic islands known as an island arc. These islands are often characterized by active volcanism and can be seen in regions such as the Pacific Ring of Fire.

Additionally, the convergence of two oceanic plates can result in the formation of tall folded mountains. As the leading edge of one plate is compressed and pushed upwards, it forms a range of folded mountains. The collision and compression forces can cause the sedimentary layers to buckle and fold, leading to the creation of prominent mountain ranges. options A,C and D are correct.

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Answer:

Explanation:

All forms of energy that may move in waves, including as light, x-rays, radio signals, heat, and microwaves, are included in the electromagnetic spectrum. These waves all have an abundance of energy in them. Additionally, they can all fly through outer space.

Light energy is a type of electromagnetic energy, while heat energy is a type of kinetic energy made up of the random motion of a material's particles. This is the main distinction among light energy and heat energy. Despite the fact that light and heat are both forms of energy, both are not the same. All forms of energy that may move in waves, including as light, heat, x-rays, radio signals, ultraviolet waves, and microwaves, are included in the electromagnetic spectrum. These waves all have an abundance of energy in them. Additionally, they can all fly through outer space.

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Answer:

0.714 in scientific notation is 7.14 × 10-1.

Answer: m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

Explanation:

1) Move the decimal 1 times to right in the number so that the resulting number, m = 7.14, is greater than or equal to 1 but less than 10

2) Since we moved the decimal to the right the exponent n is negative

n = -1

3) Write in the scientific notation form m × 10n

= 7.14 × 10-1

Therefore,

7.14 × 10-1 is the scientific notation form of 0.714 number and 7.14e-1 is the scientific e-notation form for 0.714