Question 1
Which statement about human activity and the environment is NOT true?
Humans knowingly create environmental disasters.
Humans affect ecosystems in many ways.
e
Humans can create solutions to disasters.
o
Humans have altered ecosystems for a long time.

Mass of Silver chloride-AgCl =  28.314 g

Given

1.01 L of a 0.196 M solution of Silver nitrate

Required

Mass of Silver chloride

Solution

Reaction

AgNO₃ + NaCl ⇒ AgCl + NaNO₃

mol of AgNO₃ :

mol = M x V

mol = 0.196 x 1.01

mol = 0.198

From equation, mol ratio of AgNO₃ : AgCl = 1 : 1, so mol AgCl = 0.198

mass AgCl (MW=143 g/mol)  :

mass = mol x MW

mass = 0.198 x 143

mass = 28.314 g

Answer:

B.....................

Explanation:

....... ......... .......... ......... ............ ....... ...

Answer:

A. Rock fragments are layered and pressurized over time.

Explanation:

Sedimentary rocks are derived from pre-existing rocks that have been subjected to agents of denudation, weathered, transported and deposited within a basin.

In the basin, the sediments are accumulated in their final resting position.

Answer:

yes it willl change and like this moonson happens.

Answer:

hanyuk gaasss kannnn belajarrr

Answer:

what do you mean by magnetic and sound energy

Answer:

Explanation:

When rocks, land formations and minerals begin to break down and dissolve, it's called weathering. After crumbling, the process of erosion transports these broken bits away by wind or rain. Agents responsible for weathering include ice, salts, water, wind and plants and animals.

Answer:

As: Negative

Rb: Positive

Te: Positive

Al: Positive

Answer:

A. zinc metal

Explanation:

Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. It is the first element in group 12 of the periodic table.

Answer:

A.) Zinc (Zn) is a metal

Explanation:

Hope this helps!

Answer:

Both chlorine [tex]{\rm Cl_2}\, (g)[/tex] and hydrogen chloride [tex]{\rm HCl}\, (g)[/tex].

Concentrated sulfuric acid should not be used to dry ammonia because ammonia itself would react with sulfuric acid.

Explanation:

Keep in mind that concentrated sulfuric acid is:

Because of its acidity, concentrated sulfuric acid will readily react with gases that form basic solutions when mixed with water. Therefore, concentrated sulfuric acid should not be used to dry those gases. Neither should concentrated sulfuric acid be used to dry gases that might lose electrons to concentrated sulfuric acid. Otherwise, a significant portion of those gas would be consumed in those unexpected chemical reactions.

Ammonia is one such gas. Because the solubility of ammonia in water is remarkably high, the humid ammonia gas in this question would likely exist in the form [tex]\rm NH_4OH[/tex]. When that gas comes into contact with sulfuric acid [tex]\rm H_2SO_4[/tex], the following reaction could take place:

[tex]\rm 2\, NH_4OH + H_2SO_4 \to (NH_4)_2 SO_4 + 2\, H_2O[/tex].

As long as concentrated sulfuric acid isn't used up, very little ammonia would exit from the other side of the drying apparatus. Hence, concentrated sulfuric acid shouldn't be used to dry ammonia.

Concentrated sulfuric acid does not react with chlorine or HCl under typical lab conditions. Therefore, it should be possible to dry chlorine [tex]{\rm Cl_2}\, (g)[/tex] and [tex]{\rm HCl}\, (g)[/tex] with concentrated sulfuric acid in a lab.

The  percentage by mass of ammonium fluoride in the solution : 6.738%

Given

18.7 g of NH4F solution

1.26 g NH4F

Required

The  percentage by mass

Solution

[tex]\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%[/tex]

mass solute = mass Ammonium fluoride

mass solute = 1.26 g

mass solution = 18.7 g

Input the value :

[tex]\tt \%mass=\dfrac{1.26}{18.7}\times 100\%\\\\\%mass=6.738[/tex]

Answer:

Please mention elements so i can answer it

Explanation:

Answer:

For a: The increasing of atomic radius is:

Al < Mg < Na

For b: The pH of the solution of sodium oxide is greater than 7.

Explanation:

Atomic radius is defined as the distance of the nucleus to the outermost shell containing electrons.

It decreases as we move from left to right in a period because electrons get added up in the same shell and effective nuclear charge increased which results in the shrinkage of the atom.

Sodium lies in Period 3, group 1. Its atomic radius is 1.90

Magnesium lies in Period 3, group 2. Its atomic radius is 1.60

Aluminium lies in Period 3, group 3. Its atomic radius is 1.32

The increasing of atomic radius will be:

Al < Mg < Na

The mathematical values proves the result.

There are 3 types of solution based on pH:

When a metal reacts with oxygen present in air, it forms basic oxide which simply means when they react with water, they form basic solution.

The chemical equation for the reaction of sodium (metal) with oxygen present in air and reaction with water of the product so formed are as follows:

[tex]4Na+O_2\rightarrow 2Na_2O[/tex]

[tex]Na_2O+H_2O\rightarrow 2NaOH\text{ (base)}[/tex]

Sodium forms a basic solution when its oxide reacts with water, therefore the pH of the solution will be greater than 7.

Answer:

c . A substance that cannot be broken down into simpler substances

Explanation:

The best description of an element is that it is a substance that cannot be broken down into simpler substances.

An element is a pure substance but it is the simplest unit by which chemical reactions can take place.

Answer:

b. CaCl2

Explanation:

It consists two elements

The substance that can be said to be a compound would be = CaCl2. That is option B.

A chemical compound is defined as the substance that is made up of two or more elements that are chemically combined together.

Typical examples of chemical compounds include the following:

Learn more about chemical compounds here:

https://brainly.com/question/26556885

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Answer:

Glucose

Explanation:

hope it helps

Answer: Atom/element

Explanation: Since matter cannot be created or destroyed, the number of atoms has to be equal on both sides of the equation.

Answer:

I think its B

Explanation:

Answer:

Double displacement reaction

Explanation:

Given expression:

          KOH   +    AlCl₃   →   Al(OH)₃  +  KCl

The reaction shown above is a double displacement reaction or double decomposition or double replacement reaction. This type of reaction involves an actual exchange of partners to form new compounds.

For example:

         AB + CD  →   AD + CB

Such reactions are driving by one of the following factors:

Answer:

The number of moles of carbon dioxide that would be produced is 2 moles

Explanation:

The given reaction is presented as follows;

O₂ (g) + 2CO (g) → 2CO₂ (g)

The parameters given are;

The mass of the carbon monoxide, m₁ = 70.0 g

The mass of the oxygen, m₂ = 32.0 g

The molar mass of carbon monoxide = 28.01 g/mol

The molar mass of oxygen gas O₂ = 32.0 g/mol

The number of moles, n = (The mass)/(The Molar Mass)

The number of moles of carbon monoxide in the reaction = 70.0 g/(28.01 g/mol) = 2.49910746 moles ≈ 2.5 moles

The number of moles of oxygen in the reaction = 32.0 g/(32.0 g/mol) = 1 moles

Therefore, from the chemical reaction, we have;

One mole of O₂ reacts with two moles of  CO  to produce two moles of CO₂ (g)

1 mole of oxygen produces 2 moles of carbon dioxide

Therefore, given that the number of moles of oxygen in the reaction is 1  mole, we have that the number of moles of carbon dioxide that would be produced = 2 moles.

Answer:

electrical in among us is kinda sus

Explanation:

Explanation:

I think the notation used to represent beta is B

Answer:

[tex]\frac{0}{-1} \beta[/tex]

Explanation:

A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[2]

Beta particles with an energy of 0.5 MeV have a range of about one metre in air; the distance is dependent on the particle energy.

Beta particles are a type of ionizing radiation and for radiation protection purposes are regarded as being more ionising than gamma rays, but less ionising than alpha particles. The higher the ionising effect, the greater the damage to living tissue, but also the lower the penetrating power of the radiation.

~Wikipedia

Answer:

A. To make money

Explanation:

Answer:

hi

Explanation:

A. to make money

have a nice day

bye

Answer:

Cs+ and F-

Explanation:

The compound CsF is made up of two elements; Caesium (Cs) and F (Flourine)

Caesium is a metal and would therefore lose electrons - a cation is formed. When Caesium loses a single electron, the ion symbol is given as; Cs+

Flourine is a non metal and would therefore gain electrons - an anion is formed. When Flourine gains a single electron, the ion symbol is given as; F-

Hence the correct option is;

Cs+ and F-

Answer:

B and C

Explanation:

Answer:

C

Explanation:

K,Na, Li all elements found in group 1

Answer:

Explanation:

Conduction involves transfer of heat energy through a solid medium; convection involves heat transfer of fluid particles in their masses, while thermal radiation is transfer via electromagnetic waves in a vacuum.

I hope this was helpful.

Lets study what conduction, convection and radiation are:

Learn more:

brainly.com/question/9382711

chemical that appears as a colorless liquid, is used in a wide range of cleaning and personal care products, including hair dyes and bleaches, toothpaste and mouthwashes, bathroom cleaners and laundry stain removers. Hydrogen peroxide can also be found in over-the-counter first aid antiseptics, and it is used as a bleaching agent in some food products. It has other consumer and industrial uses as well, including water treatment.

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Answer:

height is the answer

Explanation:

none of the others work