Help me out i don’t not understand this

Answer:

[tex]P_N=1.33atm\\\\P_O=0.67atm[/tex]

[tex]P_T=2.00 atm[/tex]

Explanation:

Hello.

In this case, the first step is to compute the moles of nitrogen and oxygen given their initial P, T and V conditions via the ideal gas equation:

[tex]n_{N}=\frac{P_{N}V_{N}}{RT} =\frac{2.00atm*24.0L}{0.082\frac{atm*L}{mol*K}*273K}\\ \\n_{N}=2.144molN\\\\n_{O}=\frac{P_{O}V_{O}}{RT} =\frac{2.00atm*12.0L}{0.082\frac{atm*L}{mol*K}*273K}\\ \\n_{O}=1.072molO[/tex]

After that, since the total volume now, once the mixture is formed is the addition between the initial volumes (12.0 L + 24.0 L) is 36.0 L, the partial pressure of each gas turns out:

[tex]P_N=\frac{2.144mol*0.082\frac{atm*L}{mol*K}*273K}{36.0L}\\\\P_N=1.33atm\\\\P_O=\frac{1.072mol*0.082\frac{atm*L}{mol*K}*273K}{36.0L}\\\\P_O=0.67atm[/tex]

Thus, the final total pressure is:

[tex]P_T= P_N+P_O=1.33atm+0.67atm\\\\P_T=2.00 atm[/tex]

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Answer:

A

Explanation:

it is round up to 20

Answer:

20 is the answer (A)

Explanation:

Neon/Atomic mass

20.1797 u

this is approximately 20 so 20 is the answer (A)

hope this helps!

Answer:

SOLUTION A

Explanation:

Molarity is one of the most common measure of concentration

The correct option that gives the solution that has the same molar concentration as solution X is the option;

Solution A

Reason:

The descriptions of the content or each beaker are;

Content of beaker X = Eight spheres of four groups of two differently colored spheres

Content of beaker with solution A = Four spheres of a single color

Content of beaker with solution B = Eight spheres of a single color

Content of beaker with solution C = Eight spheres in two groups of four having three spheres of one color and one sphere of a different color

The concentration of a solution given by the molarity is defined as the    number of moles per liter of the solution

A mole is a quantity of matter that contains 6.023 × 10²² elementary particles

Considering each group of spheres as representing one mole of a substance, we have;

Therefore, the solution that has the same molar concentration, (the same number of moles per volume of the solution) is solution A

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[tex]\huge\pink{Answer}[/tex]

0.0006 in scientific notation is 6 × 10-4

All numbers in scientific notation or standard form are written in the form

m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

To convert 0.0006 into scientific notation, follow these steps:

Move the decimal 4 times to right in the number so that the resulting number, m = 6, is greater than or equal to 1 but less than 10

Since we moved the decimal to the right the exponent n is negative

n = -4

Write in the scientific notation form m × 10n

= 6 × 10-4

Therefore,

6 × 10-4 is the scientific notation form of 0.0006 number and 6e-4 is the scientific e-notation form for 0.0006

Answer:

All of the above are correct.

Explanation:

The Flame Test Shortcomings

Small quantities of most molecules can not be measured by the examination.

The signal's intensity ranges from one test to the next.

The test findings are impaired by impurities or toxins.

The test is not capable of differentiating between all components.

Answer:

v = 3.60Lmol⁻¹s⁻¹ [NH₄CNO]²

Explanation:

The reaction at 65°C of ammonium cyanate to produce urea is:

NH₄CNO → NH₂CONH₂

The general rate law is:

v = K  [NH₄CNO]ˣ

Where v is rate of the reaction, K is rate constant and x represents the order of reaction

Based on the units of the rate constant (Lmol⁻¹s⁻¹ = M⁻¹s⁻¹) the reaction must be order 2 and the rate law:

v = K  [NH₄CNO]²

Explanation:

Sr(OH)2 + H3PO4 = Sr3(PO4)2 + H2O - Chemical Equation Balancer.

Answer:

3Sr(OH)2 + 2H3PO4 → Sr3(PO4)2 + 6H2O

Explanation:

please check the image for accurate answer

Answer:

H+ (aq) + OH- (aq) → H2O (l)

Explanation:

The net ionic equation is the main reaction going on in the system. The reaction between nitric acid and sodium hydroxide is a neutralization reaction.

In a neutralization reaction, the main reaction is the combination of hydrogen ions and hydroxide ions to form water. This reaction has been shown in the answer box.

Answer:

frequency

Explanation:

i just did it

Answer:

A: analog signal

Explanation:

on edge2021!

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 500 g

volume = 315 mL

We have

[tex]density = \frac{500}{315} = \frac{100}{63} \\ = 1.587301...[/tex]

We have the final answer as

Hope this helps you

Answer:

The new volume of gas is 25.7 L.

Explanation:

Given data:

Initial volume = 24.0 L

Initial pressure = 10.0 atm

Initial temperature = 200 K

Final temperature = 300 K

Final volume = ?

Final pressure = 14.0 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 10.0 atm × 24.0 L × 300K / 200 K × 14.0 atm

V₂ = 72000 atm .L. K / 2800 K.atm

V₂ = 25.7 L

The new volume of gas is 25.7 L.

Answer:

1.5 miles

Explanation:

Given that,

Speed of dog, v = 15 mph

Time taken by the dog, t = 0.1 h

We need to find the distance travelled by the dog. We know that, distance is the product of speed and time. So,

d=vt

[tex]d=15\times 0.1\\\\d=1.5\ \text{miles}[/tex]

Hence, the dog will cover a distance of 1.5 miles.

Answer: Na2HPO4

Explanation: this is the formula

Answer:

Na3PO4

Explanation:.

Answer:

MnO₂ is limiting reactant

7.68g is theoretical yield

73.6% is percent yield

Explanation:

The reaction of the question is:

3MnO₂ + 4Al → 2Al₂O₃ + 3Mn

To determine limiting reactant we need to convert each reactant to moles and, based on the chemical equation determine the moles you need of the other reactant for a complete reaction:

Moles MnO₂ -Molar mass: 86.937g/mol-:

9.81g * (1mol / 86.937g) = 0.113 moles

Moles Al -Molar mass: 26.98g/mol-:

6.54g * (1mol / 26.98g) = 0.242 moles

For a complete reaction of 0.242 moles of Aluminium you will require:

0.242mol Al * (3MnO₂ / 4Al) = 0.182 moles of MnO₂

As there are just 0.113moles of MnO₂, MnO₂ is limiting reactant

Now, with limiting reactant we need to determine theoretical moles and grams of Al₂O₃ produced:

Moles:

0.113 moles MnO₂ * (2Al₂O₃ / 3MnO₂) = 0.0753 moles Al₂O₃

Grams (Molar mass: 101.96g/mol):

0.0753 moles Al₂O₃ * (101.96g/mol) = 7.68g is theoretical yield

Percent yield is 100 times the ratio between actual yield (5.65g) and theoretical yield:

5.65g/7.68g * 100 =

a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

A compound is a material formed by chemically bonding two or more chemical elements. The type of bond keeping elements in a compound together may vary: covalent bonds and ionic bonds are two common types. The elements are always present in fixed ratios in any compound.

Chemical element, also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.

is a material made up of two or more different substances which are physically combined.

A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element. I

A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen.

hope this help!

Answer:

Here are the definitions of all of them.

Explanation:

Molecule:

a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

Compound:

A compound is a material formed by chemically bonding two or more chemical elements. The type of bond keeping elements in a compound together may vary: covalent bonds and ionic bonds are two common types. The elements are always present in fixed ratios in any compound.

Element:

Chemical element, also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.

Mixture:

is a material made up of two or more different substances which are physically combined.

Chemical Formula:

A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element. I

Pure substance:

A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen.

Answer:

It is a chemical change.

Explanation:

A tree burning down would be a chemical change because the composition of the tree is what changes, not just the physical characteristics.

Answer:

True, abiotic factors are the primary resources.

Answer: The abiotic factor sunlight is the primary source of energy for living organisms.

Explanation: edmentum/plato

Answer:

Explanation:

In order to find the original volume we use the same for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the original volume

[tex]V_1 = \frac{P_2V_2}{P_1} \\[/tex]

From the question

P1 = 172 kPa = 172000 Pa

P2 = 85 kPa = 85000 Pa

V2 = 3 L

We have

[tex]V_1 = \frac{85000 \times 3}{172000} = \frac{255000}{172000} = \frac{255}{172} \\ = 1.482558139...[/tex]

We have the final answer as

Hope this helps you

The elements in a group containing similar physical properties are

Pair 1 -- K and Li

Pair 2 -- S and Te

Pair 3 -- Br and F

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Answer:

I need to se the options

Answer:

Distillation

Explanation:

By using the method of distillation we'll identify if there is other properties of liquid by looking the temperatures,the ordor or the boiling point.

Answer:

The answer is 380.

Explanation:

Significant figures:

All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

Leading zeros are not consider as a significant figures. e.g. 0.06 in this number only one significant figure present which is 6.

Zero between the non zero digits is consider significant like 108 consist of three significant figures.

The zeros at the right side e.g 6300 are also significant. There are four significant figures are present.

How to round the value to three significant figures.

First of all we will place the vertical line after 3rd digit.

379/5

Now we will look at the 4th digit. If it is five or more than five then one is added to 3rd digit. If it is less than five the 3rd digit remain same. In given value 4th digit is 5 thus one is added into 9 and the value become 380.

The answer is 380.

Answer:

I think S.T.E.M but i'm not 100% sure

Explanation:

Answer: The answer is “ By dissolving the same number of nmoles of each substance in the same volume of water ”

Explanation:

By dissolving the same number of moles of each substance in the same volume of water. Hence, option D is correct.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution.

Adding water to a solution and the number of moles of the solvent stay the same while the volume increases.

If there is no flow of solute into or out of the volume during the addition of the solvent, the number of moles of solute remains the same.

Hence, option D is correct.

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Answer:

75 degrees

Explanation: