Some sugar is added to cold water in a beaker.
After some time, all the sugar dissolves and spreads throughout the water.
(a)(¡) Name the process that occurs which causes the sugar to spread throughout the water.
(ii) State two ways to make the sugar dissolve more quickly.
(b) Pure water can be obtained from the sugar solution using this apparatus.
Name the process used to obtain pure water from the sugar solution.​

Answer:

D. How frequently do earthquakes occur in San Francisco?

Answer:

Nope.

Explanation:

No, I do not believe that NASA invented thunderstorms to cover up the sound of space battles. For example, Benjamin Franklin is noted to have experimented with lightning in the 1700s, well before NASA or NACA existed. Therefore, NASA did not invent the concept of thunderstorms.

if you expect the unexpected is it still unexpected??

Answer:

A

Explanation:

LiCl is an ionic compound because Li is a metal (all elements in the first 2 rows are metals) and chlorine is a non-metal.

Answer: C

Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)

Explanation:

3.7 mol H20×1 mol C2H4 ×28.05 g C2H4 =51.9 g C2H4 2 mol H20 1 mol C2H4 C.

Answer:

hydrochloric acid has a molar mass of

36.46 g/mol

, which means that the

164-g

sample will contain

164

g

⋅

1 mole HCl

36.46

g

=

4.498 moles HCl

As you know, molarity is defined as moles of solute, which in this case is hydrochloric acid, divided by liters of solution

molarity

=

moles of solute

liters of solution

A

6.0-M

hydrochloric acid solution will contain

6

moles of hydrochloric acid for every liter of solution. This means that

4.498

moles will come with a volume of

c

=

n

V

⇒

V

=

n

c

V

=

4.498

moles

6.0

moles

L

=

0.7497 L

The number of moles of hydrochloric acid in 10 mL of 6.0 M HCI is 0.06 mol.

The number of moles of hydrochloric acid in 10 mL of 6.0 M HCI is claculated as follows;

Molarity = number of moles / Volume of the solution (L)

where;

Number of moles = 0.01 x 6

Number of moles = 0.06 mol.

Thus, the number of moles of hydrochloric acid in 10 mL of 6.0 M HCI is 0.06 mol.

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Answer:

Advantages of sunlight are .

hope it is helpful to you

Answer:

it helps in photosynthesis for plant

it give us vitamin D

it can prevent us from many types of diseases

it can help in our house works also

Answer:

6

Explanation:

Answer:

the answer is in the photo hope it helps❤❤

Answer:

all of the above

Explanation:

Answer:

All of the above

Explanation:

Prior to the montreal CFC production ban, all of these products released CFCs into the atmosphere. Some old air conditioner still release CFC so please be sure to dispose of them as CFC kills the ozone layer.

Answer: a.Oxygen

Explanation:

Answer:

[tex]when \: silver \: nitrate \: solution \: is \\ \\ added \: to \: sodium \: chloride \: solution. \: \\ \\ then \: a \: white \: precipitate \: of \: silver \: \\ \\ chloride \: is \: formed \: alongwith \: \\ \\ sodium \: nitrate \: solution. \\ \\ \huge\mathfrak\purple{hope \: it \: helps..} \\ \\ [/tex]

Explanation:

Answer:

If it has two resistance one upon another its a parallel circuit but if the resistance move on a line (doesn't matter if it bend ) and if a flap is send open then its a open circuit if the system line connecting the circuit ect is smooth and without any uponing lines them it is a close circuit

Explanation:

Answer:

1.2L

Explanation:

Answer:

They become smaller and more rounded

Explanation:

Answer:

C) Propane

Explanation:

It's literally all I know

The answer is Cl.

Group/family 18, the Nobel Gases, have full octets of 8 valence electrons. Each time you move to the LEFT one time within the nonmetals on the Periodic Table, an electron is lost. So, any element in group/family 17 would have 7 valence electrons (you can check this by drawing Bohr diagrams for each element within group/family 17).

So, we now know that the element is a nonmetal found in group/family 17. Therefore, it is found in the "p" block. For elements found in the "p" block, periods represent energy levels. 

Answer:

it has a huge electronegativity difference between it's atoms

The characteristic of water that makes it cohesive in nature is,

So, option C is correct one.

The water molecule have unique characteristics among all some are given below.

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Answer:

Basic concepts

Driven complex fluids, turbulent systems and glasses are other examples of non-equilibrium systems. The mechanics of macroscopic systems depends on a number of extensive quantities. ... The latter are the thermodynamic forces driving fluxes of extensive properties through the system.

Explanation:

I hope it's help u

Answer:

Chlorine gas is produced

Explanation:

One of the methods of laboratory preparation of chlorine gas is to heat manganese dioxide with concentrated hydrochloric acid. The acid is oxidized by the manganese dioxide to liberate chlorine gas as follows;

MnO2(s) + 4HCl(aq) -------> MnCl2(aq) + 2H2O(l) + Cl2(g)

Hence, When manganese dioxide is heated with concentrated hydrochloric

acid, chlorine gas is liberated.

Answer:

The cation is written first in the name; the anion is written second in the name. Rule 2. When the formula unit contains two or more of the same polyatomic ion, that ion is written in parentheses with the subscript written outside the parentheses.

When writing the formula of a compound that contains polyatomic ion, the metal is written first followed by the central atom in the ion and then other atoms that surround the central atom.

A poly atomic ion refers to an ion that comprises of more than one atom. Such ions are common in chemistry. Examples of polyatomic ions include; PO4^3-, BH4^- etc.

When writing the formula of a compound that contains a polyatomic ion, the metal is written first then the central atom in the ion follows before other atoms that surround the central atom in the ion.

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Answer: They are called substances and mixtures

Explanation:

Answer:

pure substances and mixtures.

Explanation:

Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.

PLEASE MARK ME BRAINLIEST >:3

Answer:

1250

Explanation:

Used a half life calculator, put in the given variables, and the answer was the remaining quantity. Got it right on the test as well

The answer is 1250 grams of substance will be left after 42 days.

Half-life time is the time needed for the reactants to be in its half concentration.

It is known that the decay of a radioactive isotope  obeys first order kinetics.

Also, it is clear that in first order decay the half-life time is independent of the initial concentration.

If reactant has initial concentration [A₀],

after half-life time its concentration will be ([A₀]/2).

The half-life time of the substance = 14 days.

42 days means 3 half life

After 1 half life the substance left is

= 10000/2

= 5000 grams

After second Half Life

=5000/2

=2500 grams

After Third Half Life

=2500/2

=1250 grams

Therefore 1250 grams of substance will be left after 42 days.

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Explanation:

CH4 + 4S ---> CS2 + 2H2S

4) 0.75 mol S × (1 mol CS2/4 mol S) = 0.19 mol CS2

5) 3 mol H2S × (1 mol CH4/2 mol H2S) = 1.5 mol CH4

Fe2O3 + 2Al ---> 2Fe + Al2O3

6) 25 g FeO3 × (1 mol Fe2O3/159.69 g Fe2O3) = 0.16 mol Fe2O3

0.16 mol Fe2O3 × (2 mol Al/1 mol Fe2O3) = 0.32 mol Al

0.32 mol Al × (26.98 g Al/1 mol Al) = 8.6 g Al

7) Given:

45 g Al × (1 mol Al/26.98 g Al) = 1.6 mol Al

85 g Fe2O3 ×(1 mol Fe2O3/159.69 g Fe2O3)

= 0.53 mol Fe2O3

Let's look at how much Fe each reactant will produce:

1.6 mol Al × (2 mol Fe/2 mol Al) = 1.6 mol Fe

0.53 mol Fe2O3 × (2 mol Fe/1 mol Fe2O3) = 1.1 mol Fe

Note that the given amount of Fe2O3 will give us fewer Fe. Therefore, Fe2O3 is the limiting reactant.

8) Al will produce 1.6 mol Fe × (55.845 g Fe/1 mol Fe)

= 89 g Fe

Fe2O3 will produce 1.1 mol Fe × (55.845 Fr/1 mol Fe)

= 61 g Fe

9) Since Fe2O3 is the limiting reactant, the ideal yield of Fe for the reaction is 61 g. If the actual reaction only gave us 25 g Fe. then the percent yield of Fe is

%yield = (25 g Fe/61 g Fe) × 100% = 41%

10) If we only got 25 g Fe, then the amount of Al actually used in the reaction is

25 g Fe × (1 mol Fe/55.845 g Fe) = 0.45 mol Fe

0.45 mol Fe × (2 mol Al/2 mol Fe) = 0.45 mol Al

0.45 mol Al × (26.98 g Al/1 mol Al) = 12 g

Therefore, the leftover amount of Al is

25 g Al - 12 g Al = 13 g Al

Answer: The statement they have one electron in the outermost electron shell. These are very active metals and easily lose their single valence electron, is true.

Explanation:

Metals are the species which tend to lose electron(s) to acquire stable noble gas configuration.

Elements which tend to lose a single electron in order to acquire stability are active in nature because losing one electron is more easy as compared to losing two or more electrons.

For example, atomic number of sodium is 11 and its electronic distribution is 2, 8, 1.

Since, it contains only one valence electron and by losing it sodium will acquire stability. Hence, sodium is a very reactive metal.

Thus, we can conclude that the statement they have one electron in the outermost electron shell. These are very active metals and easily lose their single valence electron, is true.

Answer:

it is a mixture.

Explanation:

Soda water is a solution of water (H2O) and carbon dioxide (CO2). It has a variable composition and there are not chemical bonds involved.

There is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.

The correct option for the given question about Mixtures is Option A) Mixture

A mixture of water (H2O) and carbon dioxide is soda water (CO2). There are no chemical bonds present, and it has a variable composition.

It is also called carbonated water as CO2 is first compressed and then get dissolved in it.

The chemical interaction between CO2 and H2O results in the production of H2CO3, a carbonic acid. This is what gives soda water a little acidity.

If the water is somewhat cold in temperature, gas can dissolve in it. The less soluble gas is, the hotter the water is. Additionally, more gas may dissolve in water at greater pressures for the water and gas combination.

Thus we can conclude that Soda water is a homogenous mixture of water and carbon dioxide.

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Answer:

They depend on people to water them and make sure they are by a window for sunlight

Explanation:

plants cant do these things by themselves

Answer:

Most flowering plants depend on animals to make the vital pollen-gran delivery. The remaining rely on wind and sometimes splashing raindrops to ferry pollen, but this is a less precise method. pollinating animals do the job for a reward: food, usually in the form of nectar.

Explanation:

Answer: An Arrhenius acid is a type of substance yields hydrogen ions, [tex]H^{+}[/tex], in an aqueous solution.

Explanation:

Substances that give dissociate to give hydrogen ions or protons when dissolved in an aqueous solution are called Arrhenius acid.

For example, HCl is a strong acid and upon dissociation in water it gives the following ions.

[tex]HCl \rightarrow H^{+} + Cl^{-}[/tex]

Thus, we can conclude that an Arrhenius acid is a type of substance yields hydrogen ions, [tex]H^{+}[/tex], in an aqueous solution.