Convert 154 kPa to atmospheres

Answer:

you need to include the bottom portion, not enough info

Explanation:

Answer:

i think it's oxygen

Explanation:

the smart kid in my class said so lol

Answer:

b

Explanation:

Answer: 10 always love yourself

Explanation:

Answer:

Brainliest-

Explanation:

Answer:

molar mass= 180

Explanation:

molar mass = (6×12) + (12×1) + (6×16) = 180

Answer:i dont know thats why imon her

Explanation:

Answer:

A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow. In a balanced chemical equation, the numbers of atoms of each element and the total charge are the same on both sides of the equation.

Answer:

chemical equation and chemical reaction

Explanation:

chemical equation is the symbolic representation Of a chemical reaction in the form of symbols

Answer:

I`m pretty sure its salt water

Explanation:

Answer:

6 moles

Explanation:

According to stoichiometry and given chemical equation 2C₂H₆(g)+7O₂(g)→4CO₂(g)+6H₂O(l), 9 moles of water are produced when 3 moles of ethane are burned.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations.

In the given problem , as 2 moles of ethane produce 6 moles of water so according to stoichiometry

∴ 3 moles of ethane will produce 3×6/2=9 moles

Thus, 9 moles of water are produced when 3 moles of  ethane are  burned.

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Answer:

The pH of the buffer is 7.0 and this pH is not useful to pH 7.0

Explanation:

The pH of a buffer is obtained by using H-H equation:

pH = pKa + log [A⁻] / [HA]

Where pH is the pH of the buffer

The pKa of acetic acid is 4.74.

[A⁻] could be taken as moles of sodium acetate (14.59g * (1mol / 82g) = 0.1779 moles

[HA] are the moles of acetic acid (0.060g * (1mol / 60g) = 0.001moles

Replacing:

pH = 4.74 + log [0.1779mol] / [0.001mol]

pH = 6.99 ≈ 7.0

The pH of the buffer is 7.0

But the buffer is not useful to pH = 7.0 because a buffer works between pKa±1 (For acetic acid: 3.74 - 5.74). As pH 7.0 is out of this interval,

this pH is not useful to pH 7.0

Answer:

Liquids have characteristic properties based on the molecules they are made of. Liquids can dissolve certain other liquids, depending on the attractions between the molecules of both liquids. Polar liquids, like water, dissolve other liquids which are polar or somewhat polar.

Explanation:

Hello!

Answer:

Nucleus

Explanation:

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA

Hope this helps have a wonderful day! :3

Answer:

Nucleus

Explanation:

Answer:

75 g/dm³

Explanation:

The following data were obtained from the question:

Mass of solute (NaCl) = 15 g

Volume of solution = 200 cm³

Concentration (in g/dm³) =?

Next, we shall convert 200 cm³ to dm³. This can be obtained as follow:

1000 cm³ = 1 dm³

Therefore,

200 cm³ = 200 cm³ × 1 dm³ / 1000 cm³

200 cm³ = 0.2 dm³

Thus, 200 cm³ is equivalent to 0.2 dm³.

Finally, we shall determine the concentration of the solution as follow:

Mass of solute (NaCl) = 15 g

Volume of solution = 0.2 dm³

Concentration (in g/dm³) =?

Concentration (in g/dm³) = mass / volume

Concentration (in g/dm³) = 15 g /0.2 dm³

Concentration (in g/dm³) = 75 g/dm³

Answer:

0.0345kg is the mass of 25L of the sample

Explanation:

Hydrophosphoric acid, H₃P = Phosphine has a density of 1.38g/L.

To solve this question we need to convert the volume of the gas to mass in grams as first and then to kilograms as follows:

Mass in grams:

25L * (1.38g / L) = 34.5g

Mass in kilograms:

34.5g * (1kg / 1000g) = 0.0345kg is the mass of 25L of the sample

Answer:

Multicellular

Explanation:

Prokaryotic cells are unicellular because the do not have a nucleus and lack organelles, while eukaryotic cells do have a nucleus, have organelles, and are are multicellular. :)

Organisms that are made up of prokaryotic cells are NOT

Multicellular.

Living organisms can be classified based on their cellular organisation.

Organisms that are made up of one cell are known as unicellular organisms.

Organisms that are made up of more than one cell are known as multicellular organisms.

A prokaryote is an organism that lacks distinct nucleus while eukaryote is an organism that possess a nucleus that is enclosed in a nuclear envelope.

While prokaryotes are always unicellular organisms, eukaryotes can be either unicellular or multicellular.

Therefore, organisms that are made up of prokaryotic cells are not multicellular.

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Answer:

44.8 litres is the answer to the question

Answer:

V = 0.25 x 22.4 Liters

Explanation:

1 mole of any gas occupies 22.4 Liters at STP.

Taking into account the STP conditions, the volume occupied by 0.25 mol of sulfur dioxide at STP is 5.6 L.

First of all, STP conditions is the abbreviation for Standard Temperature and Pressure. The standard temperature is 273 K (0 ° Celsius or 32 ° Fahrenheit) and the standard pressure is 1 atm of pressure and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

On the other hand, the rule of three is a tool that allows you to quickly solve proportionality problems.

To apply a rule of three, 3 pieces of information are needed, from which a fourth piece of information is calculated.

If the relationship between the magnitudes is direct, the rule of three must be applied. In this case, the following formula must be followed, knowing a, b and c and where x is the value to be calculated:

In this case, the rule of three is applied as follows: if by STP conditions, 1 mole of the gas occupies 22.4 L, 0.25 mole will occupy how much volume?

[tex]volume=\frac{0.25 moles*22.4 L}{1 mole}[/tex]

Solving:

volume= 5.6 L

In summary, the volume occupied by 0.25 mol of sulfur dioxide at STP is 5.6 L.

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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.

Answer:

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

Answer: 0.119 mole of Kr has a mass of 10.0 g

Explanation:

The complete Question was ontained online, albeit, it was incomplete, even from the online source. But the solution is possible based on the part of the question obtained.

Complete Question

Which of the following Noble Gases has a mass of 10.0 g?

A. 2.02 mol Ne B. 0.119 mol Kr C.

Solution

Number of moles = (Mass)/(Molar Mass)

Mass = (Number of moles) × (Molar mass)

Checking the options, one at a time,

A. 2.02 moles of Neon

Number of moles = 2.02 moles

Molar Mass of Neon = 20.1797 g/mol

Mass = 2.02 × 20.1797 = 40.762994 g ≠ 10.0 g

Not the answer.

B. 0.119 moles of Krypton

Number of moles = 0.119 moles

Molar Mass of Krypton = 83.798 g/mol

Mass = 0.119 × 83.798 = 9.971962 g ≈ 10.

Explanation:

hope this helps have a great night ❤️❤️❤️

Answer:

8.14x6.022×10^23 ~ 4.901908x10^24

Explanation:

Hund's rule tells us that 1) any orbital in a given subshell must first be occupied by a single electron before being occupied by a second electron and 2) the electrons in a singly occupied orbital all have the same spin.

Diagram I follows both 1 and 2; there are no prematurely-filled orbitals (boxes), and all the singly-filled 2p orbital have the same spin (the arrows are all pointing up). So, diagram I follows Hund's rule and is correct.

Diagram II violates 1: the first box in the 2p subshell is doubly filled while there's still a vacant orbital. That second electron in the first box should be in the third box and pointing upward for diagram II to be correct. Thus, diagram II violates Hund's rule and is incorrect.

Diagram III follows rule 1 but violates rule 2: While every 2p orbital is singly filled, they do not all have the same spin. In the second box, the arrow is pointing down while the arrows in the other two boxes are pointing up. Thus, diagram III violates Hund's rule and is incorrect.

So, of the diagrams given, II and III do not follow Hund's rule and thus are incorrect.    

Answer:

you already have the right answer b

Explanation:

Answer:

Double replacement

Mg(NO3)2 + Al(OH)3

Explanation:

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