Is water the only liquid? If not, name 5 more

Answer:

A. its reactivity

Explanation:

It's reactivity because copper was exposed to air and if it is reactivity it must be exposed to air

Answer:

A.  reactivity

Explanation:

Answer:

Halogens

Explanation:

Matter is defined as a substance which has mass and occupies volume. The three states of matter are solid, liquid and gas.

Elements which are present in group 17 are known as halogens.

Elements present in this group are fluorine, chlorine, bromine and iodine.

At room temperature, both fluorine and chlorine exists as a gas.

Bromine exists as a liquid and iodine exists as a solid.

Therefore, we can conclude that halogen groups are likely to have elements in three states of matter.

[tex]\\ \rm\longmapsto 9.7300\times 10^2+9.8700\times 10^3[/tex]

[tex]\\ \rm\longmapsto 9.73\times 10^4+9.87\times 10^3[/tex]

[tex]\\ \rm\longmapsto 19.6\times 10^{4+3}[/tex]

[tex]\\ \rm\longmapsto 19.6\times 10^7[/tex]

Answer:

1.0843 × 10^4

Explanation:

9.7300 × 10^2 + 9.8700 × 10^3

= 10843

1.0843 × 10^4

= 10843

Answer:

≈ 0.104 liters  

Explanation:

We can use Boyle's Law: [tex]P_{1}V_{1} = P_{2}V_{2}[/tex]

P₁ = 2.50 atm

V₁ = 25.0 mL

P₂ = 457 mmHg

V₂ = ?

Because pressure should be in atm we will convert 457 mmHg to units in atm:

1 atm = 760mmHg so we can divide 457 by 760 and we get ≈ 0.601atm

Next we can plug in the units to the equation for Boyle's Law:

(2.50)(25.0) = (0.601)(V₂)

Solve for V₂

V₂ will give you ≈ 104mL or 0.104L

Either is correct depending on which unit they are asking you to use

Answer:

of what grade it is of??

Explanation:

tell me then ill answer

Answer:

the reaction will come to a halt and the other reactant will still be present.

Answer:

Iron and aluminum are both examples of metals that are used commonly in everyday life.

Hey there !

Mass = 237 g

Volume 237 mL

Therefore:

Density = mass / Volume

D = 237 / 237

D = 1.0 g/mL

Hope this helps!

Answer:

[tex]\boxed {\boxed {\sf B. \ 0.5 \ M}}[/tex]

Explanation:

Molarity is a measure of concentration in moles per liter. The formula for calculating molarity is:

[tex]molarity= \frac{moles \ of \ solute}{ liters \ of \ solution}[/tex]

There are 2 moles of a compound or the solute. There are 4 liters of water or the solution.

Substitute the values into the formula.

[tex]molarity = \frac{ 2 \ mol}{ 4 \ L}[/tex]

Divide.

[tex]molarity= 0.5 \ mol /L[/tex]

1 mole per liter is equal to 1 Molar, so the solution's molarity of 0.5 mol/L is equal to 0.5 M.

[tex]molarity = 0.5 \ M[/tex]

The molarity of the solution is 0.5 Molar and choice B is correct.

Answer: [tex]ZnBr_2\rightarrow Zn^{2+}+2Br^-[/tex]

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

Here zinc is having an oxidation state of +2 called as  [tex]Zn^{2+}[/tex] cation and bromide is an anion with oxidation state of -1. Thus 2 atoms of [tex]Br^-[/tex] will combine with one [tex]Zn^{2+}[/tex] and written in simplest whole number ratios to give neutral [tex]ZnBr_2[/tex]

[tex]ZnBr_2\rightarrow Zn^{2+}+2Br^-[/tex]

Answer:

-Over time, the rates of the forward and reverse reactions equalize.

-Initially, the concentration of products is low, so the rate of the reverse reaction is also low.

Explanation:

A chemical reaction is said to be reversible when the reactants forms the products, which in turn reacts together again to give rise to the reactants. In a reversible reaction, the formation of products from reactants occurs simultaneously with the reformation of the reactants from the products. For example:

The reversible reaction: A + B ⇆ C + D means;

A + B → C + D and C + D → A + B

The rate at which both forward and reverse reactions are taking place in closed system may be initially different but with time, it gets equal to form an equilibrium reaction. However, at first, only the rate of the forward reaction proceeds because the concentration of the product is low. Hence, the rate of reaction of the reverse reaction (product to reactants) is low as well.

In the reversible reaction above, the rate of the reverse reaction (C + D → A + B) will turn out low initially because the concentration of the products (C and D) are low. With time, the rates of the forward and reverse reaction becomes equal to form an EQUILIBRIUM or STABLE reaction.

Since perchloric acid is a strong acid, it will dissociate completely, along with water. The products will be Perchlorate ions and Hydronium ions after the Perchloric acid gave away its proton and water, acting as a base, accepted that abandoned proton.

Answer:

a

Explanation:

Water is the solvent in the saline solution. Hence, option D is correct.

A solute is something being dissolved, a solvent is a thing dissolving the item, and the solution is the mixture of the two items.

In a hospital, bags of saline solution are used to rehydrate patients. They are made by dissolving a specific amount of salt in water. Water is the solvent in the saline solution.

Hence, option D is correct.

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Answer:

Explanation:

Sn + 2HBr =  SnBr₂ + H₂

Here HBr is an acid but Sn is not a base . It is a metal . So it is not an acid - base reaction .

HCl + KOH =  KCl + H₂O

HCl is an acid and KOH is a base so it is an acid base reaction.

2AlCl₃ + 3Ca(OH)₂ =  2Al(OH)₃ + 3CaCl₂

It is an acid base reaction . It is so because aluminium hydroxide is a lewis acid and calcium hydroxide is a base . So it is an acid base reaction .

2C₂H₆ +7O₂ =  4CO₂ + 6H₂O

It is not an acid base reaction . It is actually an example of oxidation reaction in which ethane burns in oxygen to give carbon dioxide and water.

Answer:

Light travels as a wave.

Explanation:

But unlike sound waves or water waves, it does not need any matter or material to carry its energy along. This means that light can travel through a vacuum—a completely airless space. (Sound, on the other hand, must travel through a solid, a liquid, or a gas.)

Answer:

The average mass of the gold coin reported to five significant figures, even though you  had to divide by "3" to obtain the average.

Explanation:

Given that,

The mass of a silver liberty was measured three times and each measurement was made  to five digits.

The mass values are,

[tex]m_{1}=12.519\ g[/tex]

[tex]m_{2}=12.521\ g[/tex]

[tex]m_{3}=12.496\ g[/tex]

The average mass of the gold  coin is 12.512 g.

We know that,

Significant figures :

Significant figures is explained the nonzero, leading zero and zeros between two nonzero digits.

For example,

The digits is 0.003405

In the digit, 345 = nonzero

0.00 = leading zero

The average mass of the gold coin reported to five significant figures because average mass is 12,512. All digits are nonzero.

Nonzero digit are significant.

Hence, The average mass of the gold coin reported to five significant figures, even though you  had to divide by "3" to obtain the average.

Answer:(b)liquid water is correct option . Because it is a molecular solid and molecular solid has weak interparticle forces of attraction

Explanation:

Answer:

Chemicals are substances in any form of matter with a chemical composition and property. Chemical reaction involves the combination of two or more different atoms chemically combined together, which are not easily separated.

Explanation:

CHEMICALS

CHEMICAL REACTIONS

NEITHER

Answer:

The answer is the same as .

Explanation:

There are 3 atoms in NaOH, 1 sodium, 1 oxygen and 1 hydrogen.

There are 3 atoms in H2O, 2 hydrogen and 1 oxygen.

Explanation:

Heat, Oxygen and Fuel

hope it helps u

Answer:

a friction helps to cause fire and oxygen helps to increase it

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An example of natural resource that is renewable is wind. Details about natural resources can be found below.

Natural resources are resources that cannot be exhausted i.e. can be replenished with time.

Examples of natural resources are as follows:

Therefore, an example of natural resource that is renewable is wind.

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The natural resource that is renewable is wind. Therefore, option B is correct.

Renewable resources are natural resources that can be restocked or regenerated over a relatively short period of time, usually within a human lifetime. These resources are often contrasted with non-renewable resources, such as fossil fuels, which take millions of years to form and are finite in quantity.

Examples of renewable resources include solar energy, wind energy, hydroelectric power, geothermal energy, biomass, and tidal power.

These resources have the potential to provide energy and other materials indefinitely if used sustainably, making them an important part of efforts to move towards a more sustainable future. Therefore, option B is correct.

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Answer:

Heat is included as one of the products for eg:

C+O2 gives CO2 + heat

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Answer:

The  pressure is [tex]P_f = 0.93 \ atm[/tex]

Explanation:

From the question we are told that

   The  volume of  Ne  is  [tex]V_N = 2.50 \ L[/tex]

    The volume  of  CO is  [tex]V_C = 2.00 \ L[/tex]

    The  pressure of  [tex]Ne[/tex] is  [tex]P_N = 1.09 \ atm[/tex]

      The  pressure of  CO is [tex]P_C = 0.773 \ atm[/tex]

The  number of  moles of  Ne present is evaluated using the ideal gas equation as

      [tex]n_N = \frac{P_N * V_N}{R T}[/tex]

=>   [tex]n_N = \frac{1.09 * 2.50 }{R T} = \frac{2.725}{RT}[/tex]

The  number of  moles of  CO present is evaluated using the ideal gas equation as

      [tex]n_N = \frac{P_C * V_C}{R T}[/tex]

=>   [tex]n_N = \frac{0.73 * 2.00 }{R T} = \frac{1.46}{RT}[/tex]

The  total number of moles of gas present is evaluated as

        [tex]n_T = n_N + n_C[/tex]

        [tex]n_T = \frac{2.725}{RT} + \frac{1.46}{RT}[/tex]

      [tex]n_T = \frac{4.185}{RT}[/tex]

The  total volume of gas present when valve is opened is  mathematically represented as

                [tex]V_T = V_N + V_C[/tex]

    =>        [tex]V_T = 2.50 + 2.00 = 4.50 \ L[/tex]

So

  From the ideal gas equation the final pressure inside the system  is mathematically represented as

         [tex]P_f = \frac{n_T * RT }{ V_T}[/tex]

=>      [tex]P_f = \frac{[\frac{4.185}{RT} ] * RT }{ 4.50}[/tex]

=>       [tex]P_f = 0.93 \ atm[/tex]

It causes freezing point depression which requires the gasoline to reach a much lower temperature before freezing. Hence, option C is correct.

Whenever a solute is added to a solution/solvent, it leads to depression in the freezing point of that solution/solvent. Depression in the freezing point of a solution on the addition of a solute is a colligative property.

A colligative property is a physical property which depends upon the number of solutes added not on the nature of solutes which means it does not matter whether we are adding 1000 particles of sugar or salt in water, the depression in the freezing point will occur by the same °C. Also, the more a solute is added the more will be the depression at the freezing point.

The formula for depression at the freezing point is mentioned as under:

             Δ T = K x m

where Δ T = freezing point depression;

                 K = cryoscopic constant;

                 m = molality of the solution.

For example, The freezing point of water is 0 °C but as soon as we add a 92 gm solute like NaCl (common salt) in 1000 gm of water, its freezing point will be lower to −3.72 °C.

Hence, option C is correct.

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Object named H is harder than Object F due to its thickness.

The object of material H is harder than the object of material F due to the difference in thickness. The thickness of Material Object H is 3 millimeters compared to Material Object F which is 1 millimeter thick, so applying the same amount of force on both objects, Material Object H does not show any change in its structure while on the other hand, the shape of the object F changes due to a lower hardness.

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Answer:

It is C. -1

Explanation:

[tex] { \underline{ \sf{ \blue{christ \: † \: alone}}}}[/tex]

Answer:

Electron gain enthalpy becomes more and more negative from left to right in a period. As we move across a period from left to right the atomic size decreases and the nuclear charge increases

Answer: Variation in electron gain enthalpy in the period : in the modern periodic table, on moving from left to right across a period the atomic size of elements decreases and the effective nuclear charge increases.

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Explanation:

Answer:

2.764 °C

Explanation:

ΔT = 2 x 1.86 C/m x 0.743m = 2.764C That means the freezing point of the solution is 2.764C less than the pure solvent (water)