What does Nocturnal mean?

Answer:

Molar mass of O is = 16

Molar mass of O2 = 32

Answer:

2.8 m

Explanation:

From the question given above, the following data were obtained:

Number of mole KBr = 0.210 mole

Mass of water = 0.075 kg

Molality of KBr =?

Molality is simply defined as the mole of solute per unit kg of water. Mathematically, it can be expressed as follow:

Molality = mole of solute / Kg of water.

With the above formula, we can obtain the molality of the KBr solution. This can be obtained as follow:

Number of mole KBr = 0.210 mole

Mass of water = 0.075 kg

Molality of KBr =?

Molality = mole of solute / Kg of water.

Molality = 0.210 / 0.075

Molality = 2.8 m

Therefore, the molality of the KBr solution is 2.8 m.

Answer:

It is going to be binary

Explanation:

Answer:

d. positron

that's the answer brainly tells me I need to write at least 20 characters and that's d u m b.

Answer:

210 moles

Explanation:

From the question given above, the following data were obtained:

Volume of solution = 25.6 L

Molarity = 8.20 M

Mole of solute =?

Molarity is simply defined as the mole of solute per unit litre of water. Mathematically, it can be expressed as:

Molarity = mole /Volume

With the above formula, the mole of solute dissolved can be obtained as follow:

Volume of solution = 25.6 L

Molarity = 8.20 M

Mole of solute =?

Molarity = mole /Volume

8.20 = mole / 25.6

Cross multiply

Mole = 8.20 × 25.6

Mole = 209.92 ≈ 210 moles

Thus, the mole of solute dissolved in the solution is 210 moles

Answer:

whats the question so i can answer?

Particles of matter are continuously moving, so they possess kinetic energy. As temperature rise the kinetic energy of atoms increase and particles move faster. So, they overcome the bonding force that holds them together. So, they change their state.

Answer:

freezing

Explanation:

when objects are in liquid for, molecules are not moving as rapidly as when an object is in solid form

Answer:

evaporation :)

Explanation:

Answer:

I'm pretty sure it's the second one that it contains fewer oxygen atoms

Given :

Number of moles of CHF₃ is 1.7 .

Solution :

We know, 1 mole of any complex contains 6.022 × 10²³ molecules.

Let, 1.7 moles of CHF₃ contains n numbers of molecules.

So, n = 1.7 × 6.022 × 10²³ molecules

n = 10.2374 × 10²³ molecules

n = 1.0237 × 10²³ molecules

Hence, this is the required solution.

Answer:

4.4 g

Explanation:

Step 1: Write the balanced equation

Cu + 4 HNO₃ ⇒ Cu(NO₃)₂ + 2 NO₂ + 2 H₂O

Step 2: Calculate the moles corresponding to 3.2 L of NO₂ at STP

At standard temperature and pressure, 1 mole of NO₂ occupies 22.4 L.

3.2 L × 1 mol/22.4 L = 0.14 mol

Step 3: Calculate the moles of Cu needed to produce 0.14 moles of NO₂

The molar ratio of Cu to NO₂ is 1:2. The moles of Cu needed are 1/2 × 0.14 mol = 0.070 mol.

Step 4: Calculate the mass corresponding to 0.070 moles of Cu

The molar mass of Cu is 63.55 g/mol.

0.070 mol × 63.55 g/mol = 4.4 g

According to stoichiometry and mole concept,1×10¹⁰ molecules reacted with excess hydrogen to make 2 x 10¹⁰ molecules of ammonia.

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 example, as 1 molecule of nitrogen produces 2 molecules of ammonia

∴2 x 10¹⁰ molecules of ammonia will be produced when 2 x 10¹⁰×1/2=1×10¹⁰ molecules .

Thus, 1×10¹⁰ molecules reacted with excess hydrogen to make 2 x 10¹⁰ molecules of ammonia.

Learn more about stoichiometry,here:

https://brainly.com/question/9743981

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Explanation:

What factors affect purity?

A1: The key parameters that can be controlled in an emew cell are current density, flow rate, electrolyte temperature, and plating time. The current density controls the production rate, while the flow rate, temperature, and plating time can all have an impact on the product

What factors affect yield?

The yield and rate of a chemical reaction depend on conditions such as temperature and pressure. In industry, chemical engineers design processes that maximise the yield and the rate at which the product is produced. They also aim to reduce waste and energy costs at all stages of the process.

HOPE THIS HELPS YOU THANK YOU.

Answer:

3.31 g/cm³

Explanation:

1000cm³ = 1L

4.87mL = 4.87 × 10^-3 × 1000 = 4.87 cm³

density = mass/volume = 16.12/4.87 = 3.31 g/cm³

Answer:

Common names of ethers simply give the names of the two alkyl groups bonded to oxygen and add the word ether. The current practice is to list the alkyl groups in alphabetical order (t-butyl methyl ether), but older names often list the alkyl groups in increasing order of size (methyl t-butyl ether).

Explanation:

Hope it is helpful.......

Answer:

it is false

Explanation:

it goes in different ways not in order

Answer:

Kindly check the explanation section.

Explanation:

Based on the description of the reacting -OH group containing Compound, the drawing of the chemical compound is given in the attached picture.

So, without mincing words let's dive straight into the solution to the question.

The reaction between the OH containing compound and PCC is an oxidation reaction.

Looking at the carbon number 1 which the first OH group and CH3 are attached to. Oxidation can not occur here as tertiary alcohol can not be oxidize.

Hence, the second OH will be oxidized into a carbonyl group, C = O. Kindly note that when alcohol oxidizes it turns into an aldehyde.

The equation for the reaction is also given the the attached picture.

Answer:

1.5 mol

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1.50moles are there in  95.33 grams of  copper. The correct option is option A.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.

Mathematically,

number of moles of copper=given mass of copper÷ molar mass of copper

Molar mass of 1 mole of copper=63.55g/mol

mass of copper=95.33g

Substituting all the given values in the above equation, we get

number of moles of copper=95.33/63.55

number of moles of copper =1.50moles

Therefore, 1.50 moles are there in  95.33 grams of  copper. The correct option is option A.

To know more about mole, here:

brainly.com/question/15209553

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Answer:

Explanation:

Newtons 1st law:

If you slide a hockey puck on ice, eventually it will stop, because of friction on the ice. It might also stop if a hockey player places their stick in front of it.

Newton's 2nd law:

If the mass of an object is 20 kg and it's acceleration is 5 m/s, the force acting upon it is (m*a or 20*5) 100 N.

Another example that proves that force is dependent upon mass is that if you were to move a car and a truck (that were both previously stationary) at the same speed, the car would take less force/effort to move than the truck.

Newton's 3rd law:

If a book on a table, the table is exerting a force on it that is equal and opposite to the force of gravity.

If two soccer balls of the same mass collide, one moving and one stationary, then they would both apply an equal and opposite force onto each other, causing the moving ball to stop and the previously stationary ball to move at the speed of  the previously moving ball.

Answer:

[tex]M=0.362M[/tex]

Explanation:

Hello!

In this case, according to the following chemical reaction:

[tex]AgNO_3(aq)+NaCl(aq)\rightarrow AgCl(s)+NaNO_3(aq)[/tex]

It is possible to compute the moles of silver nitrate via stoichiometry that produced 4.576 g of silver chloride as shown below:

[tex]n_{AgNO_3}=4.576gAgCl*\frac{1molAgCl}{143.32gAgCl}*\frac{1molAgNO_3}{1molAgCl}\\\\n_{AgNO_3}=0.03193molAgNO_3[/tex]

Thus, since the molarity is obtained by dividing moles by volume, we obtain:

[tex]M=\frac{0.03193mol}{0.08811L}\\\\M=0.362M[/tex]

Best regards!

Answer:

D. Keq: [SO3][NO] /[SO2]NO2]

Explanation:

Hello!

In this case, according to the process to set up equilibrium expressions for chemical reactions at equilibrium, we realize we need to write up the concentration of products on top and that of reactants on bottom; thus, for there chemical reaction herein specified, we obtain:

[tex]Keq=\frac{[SO_3][NO]}{[SO_2][NO_2]}[/tex]

Thereby, the answer is D. Keq: [SO3][NO] /[SO2]NO2].

Best regards!

Answer:

D

Explanation:

Answer:

4

Explanation:

Got it right edge 2021

Answer:

4 or C

Explanation:

i took the quiz

Answer:

0.214 M.

Explanation:

The equation showing the balanced chemical reaction between HCl and NaOH is given below;

HCl + NaOH ------------------> NaCl + H​​​​​​2​​​​O

Therefore, in entry one(1) the volume of HCl solution is 10mL and the volume of NaOH solution is 21.5 mL. Hence, the molarity of HCl solution is given below;

NB: the molarity of NaOH = 0.1 M.

The molarity of HCl = molarity of NaOH × volume of NaOH/ volume of HCl solution.

The molarity of HCl = 0.1 × 21.5 / 10 = 0.215 M.

For entry two(2), the volume of HCl solution is 10mL and the volume of NaOH solution is 21.3 mL. Hence, the molarity of HCl solution is given below;

The molarity of HCl =0.1 × 21.3 / 10 = 0.213 M.

For entry three(3), the volume of HCl solution is 10mL and the volume of NaOH solution is 21.43 mL. Hence, the molarity of HCl solution is given below:

Molarity of HCl = 0.1 × 21.43 / 10 = 0.2143 M.

Therefore, let's take the average of all the molarities of HCl in the three entries.

Hence, 0.215M + 0.213M + 0.2143M / 3 = 0.214 M.

Answer:

A.

Explanation:

because a theory is like a prediction and a prediction is like a hypothesis.

Answer:

comparison microscope

Explanation:

please follow me

Answer:

A. Recession of glaciers and ice caps

Explanation:

Land bridges began to disappear after the Ice Age ended.

Basically, a rise in sea level.

Hope this helps :D

Answer:

Recession of glaciers and ice cap

Explanation:

because i just took the test

100% sure

Answer:

i think its C

Explanation:

Answer:uhhhhh should I be concerned

Explanation:

Answer:

hmmm o_O Maybe you... shouldnt