What is a atmosphere

Answer:

0.125L or 125 mL

Explanation:

0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

A stock solution is a concentrated solution that will be diluted to a solution of lower concentration.

stock solution = diluted solution

Where, M1 = concentration in molarity (moles/Litres) of the   concentrated solution

V2 = volume of the concentrated solution,

M2 = concentration in molarity of the dilute solution

V2 = volume of the dilute solution.                                

The volume of 3.00M KI solution can be calculated using the dilution equation:

Given:

M1 = 3.00M, M2 = 1.25M, V1 = x, V2 = 0.300L

M1V1 = M2V2

3.00M(x) = 1.25M(0.300L)

           x = 0.125L

Hence, 0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

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Answer:

When a solid dissolves the solid and the liquid they form a mixture called a solution.

Answer:

c

Explanation:

coniferous trees, Tianga also called Boreal forest biome (major life zone).

hope it's perfect.

Answer: C is correct.

Answer:

I`m pretty sure it`s electrical tape.

Explanation:

The objects which does not conduct electricity are called insulators which are not needed to test electrical conductivity. Hence, insulated wire is the correct option.

Conductivity of a substance is the ability to conduct electrically or thermally through the substance. Based on their conductivity, there are three classes of materials conductors, semiconductors and insulators.

Conductors are materials conducting heat and electricity at all temperatures. Semiconductors conduct only at higher temperature or on doping. Insulators are material does not conduct at any condition.

Metals are good conductors. Silicon , germanium etc. are semiconductors. Whereas, wood, plastic etc. are insulators they does not allow flow of electrons through it. Therefore, an insulated wire is not needed to test conductivity.

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Answer: Covalent

Explanation:

A covalent compound is formed when an element shares its valence electron with another element. This compound is formed between two non metals. Example: [tex]HF[/tex]

An ionic compound is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal. Example: [tex]NaCl[/tex]

Answer:

a double helix structure

Explanation:

a two-stranded molecule that appears twisted, giving it a unique shape referred to most commonly as the double helix structure

Answer:

The volume is 77 L.

Explanation:

where P is pressure, V is volume, n is moles, R is the gas constant, and T is temperature in Kelvins.

The current STP temperature is 0∘C or 273.15 K (used for gas laws), and the pressure is 105Pa, which most people write as 100 kPa (both pressures are equal).

Answer:

I77

Explanation:

Explanation:

Oxidation States. +2,3,4,6,7

Electrons Per Shell 2 8 15

Electron Configuration [Ar] 4s2 3d5

1s2 2s2 2p6 3s2 3p6 4s2 3d5

Answer:

I would say proton and electron are the two most important subatomic particles in an atom

Explanation:

The number of protons inside a nucleus must equal to the number of electrons outside of the nucleus. This number determines all the chemical properties of the atom, which governs the behaviors of all matters in our world.

Answer:

I would say proton and electron are the two most important subatomic particles in an atom. The number of protons inside a nucleus must equal to the number of electrons outside of the nucleus. This number determines all the chemical properties of the atom, which governs the behaviors of all matters in our world.

Explanation:

Answer:

db gb bg    

Explanation:

Answer:

I believe the answer is A: *It is the simplest form of matter" not 100% sure but I think that's correct

Explanation:

Answer:

600 mAh·g−1

Explanation:

i hope this is good let me know if its wrong

Answer: 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.

Explanation:

The balanced chemical equation is:

[tex]2B+3H_2\rightarrow 2BH_3[/tex]  

According to stoichiometry :

3 moles of [tex]H_2[/tex] produce = 2 moles of [tex]BH_3[/tex]

Thus 27.0 moles of [tex]H_2[/tex] will produce=[tex]\frac{2}{3}\times 27.0=18.0 moles[/tex]  of [tex]BH_3[/tex]

Thus 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.

good luck on ur test i wish i could help u more but im only in 7th grade :/ and i dont know that yet, so sorry again! :(

Explanation:

Answer:

15 g of CaCo₃

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CaO + CO₂ —> CaCo₃

From the balanced equation above,

1 mole of CaO reacted to produce 1 mole of CaCo₃.

Next, we shall determine the number of mole of CaCo₃ produced by the reaction of 0.15 mole of CaO. This can be obtained as follow:

From the balanced equation above,

1 mole of CaO reacted to produce 1 mole of CaCo₃.

Therefore, 0.15 mole of CaO will also react to produce 0.15 mole of CaCo₃.

Finally, we shall determine the mass of 0.15 mole of CaCo₃. This can be obtained as follow:

Mole of CaCo₃ = 0.15 mole

Molar mass of CaCo₃ = 40 + 12 + (16×3)

= 40 + 12 + 48

= 100 g/mol

Mass of CaCo₃ =?

Mole = mass / Molar mass

0.15 = Mass of CaCo₃ / 100

Cross multiply

Mass of CaCo₃ = 0.15 × 100

Mass of CaCo₃ = 15 g

Thus, 15 g of CaCo₃ were obtained from the reaction.

Answer:

Salad dressing made with oil vinegar, and herb is a homogeneous mixtures. Because heterogeneus mixture is composed of two or more components which are unequal distributed.

But in normal salad it's heterogeneous

Answer:

2.7×6.022×10^23

=16.594×10^23 moleclules

Explanation:

number of mol= 2.7

1 mol of any element=6.022×10^23

therefote 2.7 mol =2.7×6.022×10^23

=16.594×10^23

Answer:

El rendimiento seria mayor ya que la potencia aumenta.

Explanation:

La potencia aumenta cuando determinado trabajo se realiza en menor cantidad de tiempo.

Answer:

3. They allow us to take energy from natural processes

Explanation:

There are two major sources of energy namely: renewable and non-renewable. Renewable sources of energy are those natural sources that gets replenished faster than they are utilized, which is contrary to non-renewable sources. Examples of renewable sources of energy are wind energy, solar energy, hydro (water) energy.

According to the question, one advantage or merit that renewable sources have over their counterparts is that they allow us to take energy from natural processes e.g. wind, sunlight etc.

Answer:

Brainliest-

Explanation:

2Na+2H2O----2NaOH+H2