Determine the number of moles of H in each sample.

1. 4.56 mol H2O
2. 7.86 mol NH3
3. 0.113 mol N2H4
4. 36.0 mol C10H22

Answer:

A- upfield

B- down field

C- splitting

D- chemical shift

E- integration

Explanation:

NMR is a spectroscopic technique commonly used to observe the magnetic fields around the nucleus of atoms in a compound under investigation.

A chemical shift is the difference in parts per million (ppm) between the resonance frequency of the observed protons in the compound under study and that of the tetramethylsilane (TMS) (the reference compound in NMR with a chemical shift of zero ppm because all protons in the compound are equivalent).

If signals appear close to the reference signal, the signals are said to appear upfield. If the signals appear far away from the reference, they are said to appear down field.

The presence of protons cause splitting of peaks to the magnitude of n+1. n is the number of neighboring protons. Splitting refers to the appearance of multiple peaks for a single nucleus due to neighboring nuclei.

The area of a signal that corresponds to the number of nuclei at that frequency is called the integration.

Answer:

CuO

Explanation:

Copper(II) oxide is a metal oxide it has the formula CuO.  It has formula of copper(2+). Cupric oxide, or copper (II) oxide

Answer:

You Just Have To Be Yourself To Succeed

Your difference is a strength that you will have to learn to exploit to your advantage. Thus, you should not compare yourself to others because it is a behavior that can only slow you down in your progress. Indeed, everyone progresses at their own pace in life. Your unique and beautiful just the way you are, you don't have to change yourself because of people are judging you. You just have to be yourself!

Explanation:

Answer:

Me!!!

Explanation:

Answer:

i dont no

Explanation:

i need answer please

Answer:

Explanation:

Is k2s a soluble in water?

Potassium Sulfide is a moderately water and acid soluble Potassium source for uses compatible with sulfates.

odium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na⁺ and hydroxide anions OH⁻ .

Answer:

D

Explanation:

Answer:

A -floods

Explanation:

When the Glaciers melt it causes water

Answer:

same bud same

Explanation:

tttt5566555tggf and I don't

The volume in of a 0.600 M NaCl solution that contains 0.00123 moles of NaCl is 2.05mL

The volume of a substance can be calculated using the following expression:

molarity = no. of moles ÷ volume

According to this question, a 0.600 M NaCl solution contains 0.00123 moles of NaCl.

volume = 0.00123 moles ÷ 0.600 M

volume = 0.00205L

Therefore, the volume in of a 0.600 M NaCl solution that contains 0.00123 moles of NaCl is 2.05mL.

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Answer:

False

Explanation:

Explanation:

wish I could help but I'm lost

Answer: 6.788

Explanation: Water expands 9% when frozen and if the baloon is filled with all 6.2-L then its just 9% of 6.2 which is 0.588 then add it toghether unless your asking something else becuase im not smart and I can't even divided. :p

Answer:

what are sediments???????????????????????

Explanation:

Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.

I hope that helped you.

Answer:

a naturally occurring material that is broken down by processes of weathering and erosion.

Explanation:

Dictionaries help with definitions such as the one I've given you.    :)

The enthalpy of solution is the heat evolved or absorbed in solution. From the  calculations performed, the enthalpy of solution is 3.2°C.

The term heat of solution refers to the heat evolved or absorbed when a substance is dissolved in water.

Number of moles of NaNO3 = 6.10 g/85 g/mol = 0.07 moles

Heat absorbed =  20.4 kJ/mol * 0.07 moles = 1.43 kJ

Mass of solution = 1.02 g/mL * 100 mL = 102 g

Mass of system = 102 g +  6.10 g = 108.1 g

Heat capacity of solution = 4.184 J/g･°C

From;

H = mcdT

1.43 * 10^3 J = 108.1 g * 4.184 J/g･°C * dT

dT =  1.43 * 10^3 J/108.1 g * 4.184 J/g･°C

dT = 3.2°C

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Answer:

"0.053457 M" of sulfuric acid.

Explanation:

The given values are:

[tex]V[/tex] = 10 mL solution

[tex]V_{added}[/tex] = 12.20 mL

[tex]V_{total}[/tex] = 22.20 mL

then,

M 0.103 M of NaOH,

[tex]V_{rinsed}[/tex] = experiment  will not be affected

[tex]V_{total \ base}[/tex] = 10.38 mL

Now,

⇒  mol of NAOH = MV

                            = [tex]0.103\times 10.38[/tex]

                            =  [tex]1.06914 \ m[/tex]

Whether Sulfuric acid, then

⇒  [tex]H_{2}SO_{4} + 2NaOH = Na_{2}SO_{4} + 2H_{2}O[/tex]

⇒  [tex]mol \ of \ acid =\frac{1}{2}\times \ mol \ of \ base[/tex]

⇒  [tex]1.06914 \ m \ mol \ of \ base = \frac{1}{2}\times 1.06914 = 0.53457 \ m \ mol \ of \ acid[/tex]

Before any dilution:

[tex]V_{sample} = 10 \ mL[/tex]

⇒  [tex]M \ acid = \frac{m \ mol}{V}[/tex]

                 [tex]=\frac{ 0.53457 }{10}[/tex]

                 [tex]=0.053457 \ M[/tex] (Sulfuric acid)

Answer:

The name of the smallest atom is Hydrogen

Explanation:

It's the first atom in the periodic table, meaning it has the least protons or electrions, I forgot.

Answer:

I am thinking it is woody based off of what I've seen and read.

Answer:

Since one banknote has a thickness of about 0.1 millimeters, if all the banknotes produced in a year were stacked up, they would reach a height of approximately 300 kilometers, which is about 80 times the height of Mount Fuji.

Answer : The concentration of the HCl in original bottle is 0.56 M.

Explanation :

According to neutralization law:

[tex]M_1V_1=M_2V_2[/tex]

where,

[tex]M_1[/tex] = concentration of  HCl

[tex]M_2[/tex] = concentration of NaOH

[tex]V_1[/tex] = volume of HCl

[tex]V_2[/tex] = volume of NaOH

Given:

[tex]M_1[/tex] = ?

[tex]M_2[/tex] = 0.25 M

[tex]V_1[/tex] = 10 mL

[tex]V_2[/tex] = 22.4 mL

Now put all the given values in the above formula, we get:

[tex]M_1\times 10mL=0.25M\times 22.4mL[/tex]

[tex]M_1=0.56M[/tex]

Therefore, the concentration of the HCl in original bottle is 0.56 M.

Answer:

Monosaccharides. Carbohydrates are the most abundant biomolecule on Earth. Living organisms use carbohydrates as accessible energy to fuel cellular reactions and for structural support inside cell walls. Cells attach carbohydrate molecules to proteins and lipids, modifying structures to enhance functionality.

Explanation:

Answer:

14

Explanation:

Neutrons are neutral and if there are no electrons to cancel out the protons you add the neutrons and protons together

Answer:

This problem is providing a chemical equation between two hypothetical elements, X and Y and asks for the molesof X that are needed to 

produce 21.00 moles of D in excess Y. After the following work, the answer turns out to be 15.75 mol X:Mole ratios:In chemistry, one the most crucial branches is stoichiometry, which allows us to perform calculations with grams, moles and particles (atoms, molecules and ions). It is based on the concept of mole ratios, whereby the moles of a specific substance can be converted to moles of another one, say product to reactant, reactant to reactant, reactant to product and product to product.

Calculations:In such a way, since 21.00 moles of D are given, we need the mole ratio of D to X in order to get the answer, which according to the reaction is 3:4 based on their coefficients in the reaction. Hence, we calculate the required as follows:

Explanation:

mark me brainliest!!

Answer:

Explanation:

So, Total amount of time = 3 × ( Half - life of Sodium - 24 ) = (3 × 15 h) (3 × 15 h) = 45 h. So, 45 h is three half - lives .

Answer:

5.13x10>-2

Explanation:

The question is incomplete; the complete question is;

Using a triple beam balance and a graduated cylinder, a student collected data on a sample of an element:

Mass of sample = 18.9 g

Volume of water = 30.0 mL

Volume of water and sample = 35.0 mL

Calculate the density of the sample using sig figs.

Answer:

3.8 g/mL

Explanation:

Mass of sample = 18.9 g

Volume of water = 30.0 mL

Volume of water and sample = 35.0 mL

Volume of the sample = 35.0 mL – 30.0 mL = 5.0 mL

D = m/v

D = 18.9 g / 5.0 mL =3.8 g/mL

[tex]\huge\frak\red{Answer}[/tex]

[tex]\small\mathbb\green{they \: are \: two \: types \: of \: raise \: awareness}[/tex]

1) Throw an Event

2) Amp up Social Media

_____________________________________________

[tex]\small\mathbb\orange{hope \: it's \: helpful \: to \: you}[/tex]

Answer:

The answer is 30%

What is the first organic compound prepared in laboratory?

➪ Urea was the first organic compound which was synthesised from inorganic chemicals. Fredrich Wohler is known for the synthesis of Urea. He formed the compound with ammonium cyanate, an inorganic salt.

Answer:

Urea

Explanation:

It drawbacked the theory organic compounds can't be prepared artificially