To be considered a source of water pollution, the source must include a chemical.
Please select the best answer from the choices provided
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Answer:

I would expect the gas rate determined in this manner to be too low

Explanation:

A Rotameter can be designed to respond to the sensitivity of density, velocity, to measure the flow rate of liquid or gas enclosed in a tube. Liquids are denser than gas, and since the gas rate to be determined needed to respond to the velocity head alone of the rotameter so as to bring the forces in the tube equilibrium. Knowing if there is no flow, then the float would remain at the bottom, so gas has to flow at a higher rate compared to the liquid so the float would be in a similar position making it easier to measure the flowrate. This leaves the gas rate to be determined too low.

Answer:

Water is life, as the saying goes. We rely on water for our food, our health, our livelihoods, and for fun and leisure. But water can also take away life, and the absence of water can be even worse. Currently, 700 million people live in water-stressed areas. By 2025, this number is expected to grow 1.8 billion — about 25% of the world population.

As Number 6 on the UN’s Sustainable Development Goals, “Clean Water and Sanitation For All” is currently struggling. The UN suggests that, if we want to meet this goal by the deadline of 2030, we’ll need to double our current rate of progress to ensure that there’s universal access to safe and affordable drinking water, adequate sanitation and hygiene resources, improved water quality, and restored water-related ecosystems. Here are 5 ways that water affects our lives — and what we’re doing to help make them happen.

Explanation:

Many of the towns we live in were built near water sources. Oceans, rivers, streams and lakes make up some of our geographical boundaries. They also allow for water transportation and commerce and provide food and other resources.

Answer:

27.5 gram

Explanation:

16 gram CH⁴ gives 44 gram CO²

1 gram CH⁴ gives 44/16 gram CO²

10 gram CH⁴ gives (44/16)×10 gram CO²=27.5 gram Co²

Answer:

45 g of salt was added

Explanation:

238g-193g=45g

Explanation: nad   .......

Sodium is not use, as a metal catalyst for the hydrogenation of an alkene. Therefore, option C is correct.

Hydrogenation is the chemical reaction that occurs when molecular hydrogen reacts with another compound or element, typically in the presence of a catalyst such as nickel, palladium, or platinum. Organic compounds are commonly reduced or saturated using this method.

A hydrogenation reaction is an example of an alkene addition reaction. Two hydrogen atoms are added across the double bond of an alkene in a hydrogenation reaction, resulting in a saturated alkane.

To activate the chemical reaction between hydrogen and another compound, hydrogenation catalysts, typically made of iridium, nickel, palladium, platinum, rhodium, or ruthenium, are used.

Therefore, option C is correct.

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Answer:

The correct answer is D. Ask a question that can be answered by making observations.

Explanation:

Basically, in order to develop a testable hypothesis, scientists must adhere to the guidelines of the scientific method.

The scientific method is usually understood to be a so-called hypothetical-deductive method, the core of which is to make hypotheses based on observations or measurements, to make predictions based on them and to check the validity of predictions by repeated experiments. More generally, the scientific method is a general way of obtaining solid knowledge, using many means of proof, both empirical and theoretical, to achieve certainty. The scientific method is a widely recognized tool in the scientific community for seeking objectivity, reliability and transparency in research.

Answer:

95/36 Kr or A

Explanation:

In the given nuclear fission reaction, X represents ⁹⁵₃₆Kr. Therefore, the correct option is option A.

Nuclear fission is the splitting of a nucleus of heavy atoms, such that of plutonium or uranium, into two roughly equal mass fragments. A significant amount of energy is released during the process. The core of an atom splits into two nuclei that are lighter during nuclear fission.

When the nucleus is excited by a variety of particles (such as neutrons, protons, deuterons, and alpha particles) or by electromagnetic radiation takes the form of gamma rays, the process may occur spontaneously or be induced.  In the given nuclear fission reaction, X represents ⁹⁵₃₆Kr.

Therefore, the correct option is option A.  In the given nuclear fission reaction, X represents ⁹⁵₃₆Kr.

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Your question is incomplete but most probably your full question was,

Answer:

her speed is constant as she runs, and her av. speed is 3 m/sec

Explanation:

av speed is total distance divided by total time, so 150/50=3

Answer:

79.4 %

Explanation:

From the question given above, the following data were obtained:

Theoretical yield = 3.4 kg

Actual yield = 2.7 kg

Percentage yield =?

Percentage yield is simply defined as the ratio of the actual yield to that of the theoretical yield multiplied by 100 i.e

Percentage yield = Actual yield/Theoretical yield × 100

With the above formula, we can obtain the percentage yield as follow:

Theoretical yield = 3.4 kg

Actual yield = 2.7 kg

Percentage yield =?

Percentage yield = Actual yield/Theoretical yield × 100

Percentage yield = 2.7/3.4 × 100

Percentage yield = 79.4 %

Thus the percentage yield is 79.4 %

The percent yield is 79.4%

From the question,

We are to determine the percent yield.

Percent yield is given by the formula,

[tex]Percent\ yield = \frac{Actual\ yield}{Theoretical yield } \times 100\% [/tex]

From the given information,

Actual yield = 2.7 kg

Theoretical yield = 3.4 kg

Putting the parameters into the formula,

[tex]Percent\ yield = \frac{2.7}{3.4} \times 100\% [/tex]

Then,

[tex]Percent\ yield = 0.7941176\times 100\% [/tex]

[tex]Percent\ yield = 79.4\% [/tex]

Hence, the percent yield is 79.4%

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Answer:

75.924 g

Explanation:

To answer this question we first need to calculate the molar mass of Ga₂(SO₃)₃:

Molar Mass of Ga₂(SO₃)₃ = (Molar Mass of Ga)*2 + (Molar Mass of SO₃)*3

Molar Mass of Ga₂(SO₃)₃ = (69.72 g/mol)*2 + (80.06 g/mol) * 3

Then we convert 0.20 moles to grams, using the molar mass of Ga₂(SO₃)₃:

Mass of 0.20 moles of Ga₂(SO₃)₃ is 75.924 g

It is defined as the ratio of given mass over molar mass.

Given:

Number of moles= 0.20 moles

To find:

Mass=?

We need to calculate molar mass of Ga₂(SO₃)₃ first:

Molar Mass of Ga₂(SO₃)₃ = (Molar Mass of Ga)*2 + (Molar Mass of SO₃)*3

Molar Mass of SO₃ = Molar Mass of S + (Molar Mass of O)*3 = 80.06 g/mol

Molar Mass of Ga_2(SO_3)_3 = (69.72 g/mol)*2 + (80.06 g/mol) * 3

Molar Mass of Ga₂(SO₃)₃ =  379.62 g/mol

Then we convert 0.20 moles to grams, using the molar mass of Ga₂(SO₃)₃:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} \\\\\text{Given mass}=\text{Number of moles}*\text{Molar mass}\\\\\text{Given mass}=0.20 moles*379.62 g/mol\\\\\text{Given mass}=75.92 grams\\[/tex]

Thus, the mass of 0.20 moles of Ga₂(SO₃)₃ is 75.92 grams.

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Answer: C. Gas particles move faster and farther apart at higher temperatures.

Explanation:

The options include:

A. the number of gas particles increases at higher temperatures

B. the number of gas particles decreases at higher temperatures

C. gas particles move faster and farther apart at higher temperatures

D. gas particles move more slowly and get closer together at higher temperatures

The statement that describes how the outcome (dependent) variable changes as a result of the changes made to the tested (independent) variable is that gas particles move faster and farther apart at higher temperatures.

It should be noted that the particles in the gases will collide more frequently with one another because of the shorter space that is between them.

The increase in the temperature will bring about a faster movement of the particles which in turn, brings about a rise in the diffusion rate and also the collision rate.

Answer:

Three hydrogen atoms to form PH₃.

Explanation:

Hello!

In this case, since the elements belonging to the nitrogen family (N, P, As, Sb and Bi) show five valence electrons, because there are five electrons at their outer shell, it is clear that if phosphorous bonds with hydrogen, it is going to require the same amount of oxygen atoms (3) because elements having five valence electrons need 3 bonds in order to attain the octet (5+3=8).

Therefore the compound would be:

[tex]PH_3[/tex]

Which is phosphine.

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Answer:

Q = -14322.77 J

Explanation:

Given data:

Mass of water = 55.0 g

Initial temperature = 87.3°C

Final temperature = 25.0 °C

Heat given off = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Specific heat capacity of water is 4.18 J/g.°C

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 = 25.0 °C - 87.3°C

ΔT = - 62.3 °C

Q = 55.0 g×4.18 J/g.°C × - 62.3 °C

Q = -14322.77 J

Answer:

Energy is never lost, it just changes from one form to another

Answer:

8,68%

Explanation:

12g/mol de C divided by 138,2 g/mol de K2CO3

0.0868 x 100 = 8.68 %

Answer:

CH₃CH == CH₂  +  H₂O → H⁺ →  CH₃CH(OH)CH₃  +  H⁺

The reaction of propene and water in acidic medium produces isopropyl alcohol.

Explanation:

Let's propose the following reaction:

Propene + H₂O in H⁺ medium  →  Alcohol

CH₃CH == CH₂  +  H⁺ →  CH₃C⁺CH₂

Electrons from the double bond attack the proton. So the double bond is broken and you form a carbocation.

Carbocation will be attacked by the electrons from the oxygen on the molecule of water.

CH₃C⁺CH₂  + H₂O: :  →  CH₃ _CH _ CH₃  

                                                   |

                                                ⁺OHH

It is called electrophilic addition cause the proton which is the electrophile is added to the sp₂ carbon in the alkene (where many H are bonded),  and the nucleophile, water is added to the other sp₂ carbon.

This last attack is so fast that the carbocation is combined with any nucleophile which it collides first. In the hydration reaction, there are two nucleophiles: water and the anion from the acid (let's think Cl⁻, cause our medium can be HCl).    The product of this collision is a protonated alcohol. Since we know that protonated alcohols are very strong acids, this protonated alcohol loses a proton, and the end product of the addition reaction is an alcohol.

In the first step, a proton adds to the alkene, but is returned to the reaction mixture during the final step, when the alcohol is deprotonated.

 CH₃ _CH _ CH₃   →   CH₃ _CH _ CH₃   + H⁺

             |                                 |

          ⁺OHH                          OH

Answer:

help with what...

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Answer:

The solute is the substance that is being dissolved,

Explanation:

A solution is a homogeneous mixture consisting of a solute dissolved into a solvent .

Answer:

solutes

Things which dissolve are called solutes and the liquid in which they dissolve is called a solvent to form a solution. Strongly polar substances easily attract water molecules. The water molecules surround the charged solute.

Explanation:

Took the same test and that was the one that was right hope this helps you

Mass is the multiplication product of moles and the molar mass of the substance. The mass of aluminum chloride in the reaction is 48.95g.

Grams are the unit of the measurement of the substance used to calculate the weight of the substance in a compound or molecule.

The balanced chemical reaction is  given as:

[tex]\rm 2Al (s) + 3Cl_{2} (g) \rightarrow 2AlCl_{3} (s)[/tex]

Given,

Mass of aluminium = 34.0 gm

Mass of chlorine gas = 39.0 gm

The moles of aluminum is calculated as:

[tex]\dfrac{34}{27} = 1.26[/tex]

The moles of chlorine gas are calculated as:

[tex]\dfrac{39}{2 \times 35.5} = 0.55[/tex]

From the moles, it can be seen that aluminum is in excess so further calculations will be done based on the moles of chlorine gas.

Moles of aluminum chloride are calculated as:

[tex]\dfrac{0.5500 \;\rm mol \; Cl_{2} \times 2 \;\rm mol \; AlCl_{3}}{3 \;\rm mol \; Cl_{2}} = 0.3667 \;\rm mol \;\rm AlCl_{3}[/tex]

Moles of aluminum chloride are 0.3667 and the molar mass is 133.341 g/mol. The mass is calculated as:

[tex]0.3667 \times 133.341 = 48.8961[/tex]

Therefore, 48.95 gm is the mass of aluminum chloride.

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Answer:

[tex]M+e^-\rightarrow M^+[/tex]

Explanation:

Hello!

In this case, since corrosion is a reaction by which a metal is oxidized to a form in which it has a higher oxidation state due to the fact that it loses electrons and therefore it becomes positively charged. In such a way, for a general metal M, we could have the following corrosion reaction:

[tex]M+e^-\rightarrow M^+[/tex]

The amount of electrons and the resulting oxidation state depend upon the nature of the metal, for instance, we can see it for silver, zinc and aluminum:

[tex]Ag+e^-\rightarrow Ag^+\\\\Zn+2e^-\rightarrow Zn^{2+}\\\\Al+3e^-\rightarrow Al^{3+}[/tex]

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Answer:

Explanation:

Hnsnsnsnsnqnananana

Answer:

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. (Atomic mass is also referred to as atomic weight, but the term "mass" is more accurate.)

Answer:

121

Explanation:

add 1+120 to get answer

Answer:

Sodium and Magnesium

Explanation:

The elements in Groups 1 and 2 get more reactive as you go down the group.

This means that Sodium is more reactive than lithium and Magnesium is more reactive than beryllium.

On the periodic table, as you go down the group, the reactivity of an element increases. Especially with metals in group 1 and 2. Now Lithium is a metal of group 1, followed by Sodium, while Beryllium is a metal in group 2, followed by magnesium. That's how I picked the answers

Answer:

The temperature that is required is 357 C.

Explanation:

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is maintained at a constant pressure, by means of a constant of proportionality that is applied directly. For a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement of the gas molecules. .

In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between the volume and the temperature will always have the same value:

[tex]\frac{V}{T} =k[/tex]

Now it is possible to assume that you have a certain volume of gas V1 that is at a temperature T1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the temperature will change to T2, and it will be true:

[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{1.10*10^{3}L }{315 K} =\frac{2.20*10^{3}L }{T2}[/tex]

Solving:

[tex]T2=\frac{2.20*10^{3}L }{ \frac{1.10*10^{3}L }{315 K} }[/tex]

T2=630 K= 357 C

The temperature that is required is 357 C.

Answer:

(CH3)CI

Explanation:

As we move down the group, the halogen atoms become more easily polarizable and the C-X bond is more easily broken.

Recall that E2 mechanism has to do with synchronous proton abstraction and loss of the halogen.

These occur faster with (CH3)CI than when the C-X bond involves other halogens.

Answer:

yes. because look at the equation it will have an ionic bond

Explanation: