Worth 40 Points❤ 10th grade chemistry ‍

Mass of water needed : 96.3 g

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

moles H₂O=

[tex]\tt moles=\dfrac{N}{No}\\\\moles=\dfrac{3.22\times 10^{24}}{6.02\times 10^{23}}\\\\moles=5.35[/tex]

mass H₂O(MW=18 g/mol) :

[tex]\tt mass=moles\times MW\\\\mass=5.35\times 18\\\\mass=96.3~g[/tex]

Answer:true

Explanation:

Answer:

im not sure but ill say false

Explanation:

Volume (liters) of aqueous 0.325 M nitric acid is 0.132 L

Reaction

2HNO₃ + Ba(OH)₂ → Ba(NO₃)₂ + 2H₂O

mass of Ba(OH)₂ = 3.68 g

mol Ba(OH)₂(MW=171,34 g/mol) :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{3.68}{171,34 g/mol}\\\\mol=0.0215[/tex]

From the equation, mol ratio of HNO₃ : Ba(OH)₂ = 2 : 1, so mol HNO₃:

[tex]\tt mol~HNO_3=\dfrac{2}{1}\times 0.0215=0.043[/tex]

Molarity of HNO₃ = 0.325, then the volume of HNO₃ :

[tex]\tt V=\dfrac{n(mol)}{M(molarity)}\\\\V=\dfrac{0.043}{0.325}\\\\V=0.132~L[/tex]

Answer:

Argon

Explanation:

Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas

hope it helps!

[tex]N_3[/tex]  is more basic than [tex]N_1[/tex] in imidazole.

Imidazole have two nitrogen attached in the ring at [tex]N_1 and N_3[/tex] .

This compound is an aromatic compound as it have [tex](4n+2)[/tex]π electrons which means lone pair electrons of [tex]N_1[/tex] nitrogen atom also takes part in π

system.

Thus when a proton attacks on this compound it easily attacks at [tex]N_3[/tex] rather than [tex]N_1[/tex].

After the attack of [tex]H^{+}[/tex] ion at [tex]N_3[/tex] the conjugate base thus formed is also aromatic and hence is more stable.

If the proton had attacked at [tex]N_1[/tex] the conjugate base would not be aromatic and its stability will decrease.

The reaction is shown in the image attached

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Answer:

2px orbital...

Orbitals are represents the wave-like behavior of an electron or pair of electrons in an atom. Therefore it shows 2pX orbital.

The four fundamental kinds of orbitals are s, p, d, and f. The spherical form of a s orbital can accommodate two electrons.

Each of the three p orbitals has the same fundamental structure but differs in its spatial orientation. Up to six electrons can fit into the p orbitals.

The s sublevel can only hold two electrons because it has one orbital. The p sublevel has three orbitals and a maximum capacity of six electrons.

The d sublevel may hold a maximum of 10 electrons due to its five orbitals. Additionally, the 4 sublevel has 7 orbitals and a maximum of 14 electrons.

Thus, it shows 2pX orbital.

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Answer:

This question is incomplete

Explanation:

This question is incomplete. However, to determine the number of different element participating in a reaction, count the number of individual atoms participating the reaction. For example,

H₂SO₄ + 2NaOH  ⇒  Na₂SO₄ + 2H₂O

The number of different elements involved in the reaction above are hydrogen (H), sulphur (S), oxygen (O) and sodium (Na). This means there are 4 different elements involved in the reaction.

But to determine the total number of atoms involved in a reaction, one must first ensured the reaction is balanced (because the number of each atom must be considered). Using the same reaction illustrated earlier hydrogen (H) has 2 atoms in H₂SO₄ and 2 atoms in NaOH, sulphur (S) has 1 atom in H₂SO₄, oxygen (O) has 4 atoms in H₂SO₄ and 2 atoms in NaOH and sodium (Na) has 2 atoms in NaOH. Thus, total number of atoms is 13 atoms.

Note that the number of atoms on the reactant side would be same as number of atoms on product side because of law of conservation of matter. Thus, participating atoms in the reaction is 13

Answer:

nuclear force

I hope this helps :)

Explanation:

Answer:

 [tex]\frac{3}{2}[/tex]

Explanation:

Given formula of Gypsum:

               CaSO₄. xH₂O,

       True formula:

              CaSO₄. 2H₂O,  x  = 2

Formula of plaster of paris  = CaSO₄. [tex]\frac{1}{2}[/tex] H₂O,

               y  =  [tex]\frac{1}{2}[/tex]

The difference between x and y; x - y:

               x  - y = 2 -  [tex]\frac{1}{2}[/tex]  =  [tex]\frac{3}{2}[/tex]

Answer:

yuh because it's the hot water :)

Answer:

B

Explanation:

Sorry if wrong

Answer:It’s D, when you add up the atoms for carbon you get 6, and the only answer choice with 6 is D

The rate constant at 366K is 0.58 s⁻¹.

Ea = 108 kJ/mol = 108000 J/mol; an activation energy of a reaction

T₁ = 275 K

k₁ = 4.60 × 10⁻⁶ 1/s; the rate constant at 275 K

T₂ = 366 K

R = 8.314 J/Kmol

k₂ = ?; the rate constant at 366 K

Arrhenius equation: ln(k₁/k₂) = Ea/R (1/T₂ - 1/T₁)

ln(4.60 × 10⁻⁶s⁻¹/k₂) = 108000 J/mol/8.314 J/Kmol × (1/366K - 1/275K)

k₂ = 0.58 s⁻¹

For all chemical reaction some energy is required and that energy is called activation energy (energy that needs to be absorbed for a chemical reaction to start).

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Answer:

0.5moles

Explanation:

Given parameters:

Volume of solution= 0.25L

Molarity of solution = 2.00M

Unknown:

Number of moles  = ?

Solution:

To solve this problem;

  Molarity is the number of moles of solute in a given volume of solution, so

 Number of moles  = molarity x volume

 Now insert the parameters and solve;

  Number of moles  = 0.25 x 2  = 0.5moles

Answer:

b

Explanation:

got it right on test

Answer:

its rather B or C

Im sorry if I was wrong

Explanation:

Answer:

Last one: Cations give away electrons and anions accept those electrons.

Explanation:

Just did it

Answer:

D

Explanation:

"Cations give away electrons and anions accept those electrons."

NH4NO3 The molar mass is 80.04336 g/mol

N2O5 The molar mass is 108.01.

NaCN The molar mass is 49.00717 g/mol

(NH4)2SO4 The molar mass is 132.139 g/mol .

Molar masses

The mass in grams of one mole of a chemical is its molar mass.

1) What is the mass of 5.6 L of CO2 gas at STP?

PV = nRT is the ideal gas equation, which links pressure (P), volume (V), and absolute temperature (T).

where R = 8.314 Jmol K-1, the universal gas constant.

1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 atm = 1.1310 5 Nm 2

V=nRT/P =1.8.14.273/(1.013.10 5) =0.0224 m 3

2.24 liters

As a result, a gas's molar volume at STP is 22.4 litres.

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Answer:

Because helium has more molecules trying to escape at faster rates

Explanation:

Answer:

helium filled balloons tend to deflate over time faster than air filled balloons do because, the average velocity of helium molecules is higher than that of molecules of any gas found in air, so helium escapes through the pores in the balloon more quickly.

Explanation:

after researching I found this and tried to respond as quickly as possible!! hope this helps but it has something to do with the molecules .

Answer:

P(O₂) = 26KPa

Explanation:

Given data:

Total pressure = 150 KPa

Partial pressure of nitrogen = 100 KPa

Partial pressure of carbon dioxide = 24 KPa

Partial pressure of oxygen = ?

Solution:

According to Dalton law of partial pressure,

The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.

Mathematical expression:

P(total) = P₁ + P₂ + P₃+ ............+Pₙ

Now we will solve this  problem by using this law.

P (total) = P(O₂) + P(N₂) + P(CO₂)

150 KPa =   P(O₂) + 100 KPa + 24 KPa

150 KPa = P(O₂) + 124 KPa

P(O₂) = 150 KPa  - 124 KPa

P(O₂) = 26KPa

Answer:

Water. Chemical Formula: H2O.

Table Salt. Chemical Formula: NaCl.

Sucrose (Sugar) Chemical Formula: C12H22O11.

Soaps. Chemical Formula: RCOO–Na, Where R is a long chain of carbon atoms ranging from 16-18 in number.

Toothpaste. Chemical Formula: CaCO3 or NaF.

Explanation:

Answer:

c is the awnser

a hypothesis is not a question it is more like a statment and something that could be proven in the future

CH3OH and CH3CH2CH2OH will easily dissolve in water based on polarity not on size.

In chemistry, polarity describes the type of bonds that exist between atoms. Atoms share electrons when they join forces to form chemical bonds. When one of the atoms applies a stronger attractive force to the bond's electrons, a polar molecule is created.

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Explanation:

green is dominate and theres a G in each box that makes it all Green

Answer: During a chemical reaction, matter cannot be created nor destroyed, matter can change form through physical and chemical changes, but through any of these changes, matter is conserved; even though the matter may change from one form to another, the same number of atoms exists before and after the change takes place.

Explanation: <3

Answer:

a) Na2S

b) AlF3

c) O2

d) C6H12O6

Explanation:

please mark me brainliest and 5 star

Answer:

Electronegative element form anion that is larger than its neutral atom like fluorine F-

Explanation:

Answer:

Pendulum, body suspended from a fixed point so that it can swing back and forth under the influence of gravity. Pendulums are used to regulate the movement of clocks because the interval of time for each complete oscillation, called the period, is constant.

Explanation:

It is a simple tool which helps in balancing, healing and clearing our mind and body. They help us seek answers to certain questions by picking on subtle vibrations. They do so by moving in the direction of invisible energy around us.