CHEMISTRY HIGH SCHOOL

What is the chemical formula for sodium sulfate?(1) Na2SO3 (3) NaSO3
(2) Na2SO4 (4) NaSO4

Answers

Answer 1
Answer: The chemical formula for Sodium Sulfate is Na2SO4.

Related Questions

Energy transfer by convection is primarily restricted toA. gases. B. liquids. C. solids. D. fluids. E. none of the above
This problem has been solved!See the answerNaCl is an ionic solid. The Na+ and Cl− ions in NaCl are bonded through an electrostatic force of attraction commonly known as the ionic bond. Water is a polar solvent. The oxygen atom, being more electronegative, attracts the electron cloud toward itself. As the electron cloud is pulled by the oxygen atom, it carries a partial negative charge, and the hydrogen atoms carry a partial positive charge. This partial separation of charges in the water molecule makes it polar. Predict which intermolecular forces contribute the most to the dissolution of NaCl in water. Check all that apply.a. Ion-ion forcesb. Ion-dipole forcesc. Dipole-dipole forcesd. Hydrogen bondingSuppose that NaCl is added to hexane (C6H14) instead of water. Which of the following intermolecular forces will exist in the system?a. Ion-dipole force between Na+ ions and a hexane moleculeb. Ion-ion force between Na+ and Cl− ionsc. Dipole-dipole force between two hexane moleculesd. Hydrogen bonding between Na+ ions and a hexane moleculee. London dispersion force between two hexane molecules
Who placed all the elements in the right place according to their properties
Is sand biotic or abiotic
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH–] is 1 x 10–11 mol/L. Is this solution acidic, basic, or neutral? Show all work.

How do you calculate the number of moles when given the number of particles?

Answers

Answer:

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Considering the law of conservation of mass, if 56 g samples of solid iron (Fe) reacts with 24 g of oxygen (O2), how many grams of Iron Oxide (FeO) are obtained?

Answers

Answer:

62_grams of FeO

Explanation:

Molar mass of Fe = 55.845_g/mol

Molar mass of O2 = 15.999_g/mol

From law of conservation of mass

2 moles of Fe combines with one mole of O2 to form 2 moles of FeO

Number of moles of Fe and O2 present = mass/(molar mass) = 56/55.845~1

and 24/16 = 1.1.5

Therefore

1 part of Fe will react with 0.5 part of one mole of O2

which is 54_g of Fe reacts with 8_g to form 54+8 = 62_grams of FeO

Based on intermolecular forces, which of these substances would have the highest boiling point?(1) He (3) CH4
(2) O2 (4) NH3

Answers

NH3 would have the highest boiling point because the molecules have all 3 types of bonds:
London dispersion, because all molecules do
Hydrogen Bond, because of the fact that hydrogen is present and so is Nitrogen, one of the elements that hydrogen will form a hydrogen bond with.
Dipole Bond: Because the NH3 has a lone pair

Answer: NH3

Hope this helped!!!
Based on intermolecular forces, NH3 would have the highest boiling point. 

Why does the chemical reaction seen here obey the law of conservation of matter? a. because there are the same number of atoms of each element shown on both sides
b. because they both start and end with diatomic (two-atomed) molecules
c. because they both start and end with the same types of particles
d. because they both start and end with two sets of particles eliminate

Answers

Why does the chemical reaction seen here obey the law of conservation of matter?

Answer:

  • Because there are the same number of atoms of each element shown on both sides

Explanation

  • As in chemical reactions, atoms bonds are break and new bonds are formed. As new substance are formed but overall they have same elements, no new elements come from outside or go to outside. In other words , rearrangement of atoms take place but number of atoms remained same.

                            NaOH + HCl -----> NaCl + H2O

  • As in above reaction there are the same number of atoms of each element shown on both sides .
The chemical reaction seen here obey the law of conservation of matter because there are the same number of atoms of each element shown on both sides. The answer is A. Thank you for posting your question here. I hope it helps. 

(A) free energy(B) lattice energy
(C) kinetic energy
(D) activation energy
(E) ionization energy
the minimum energy required for a nonspontaneous reaction

Answers

The answer is (D) activation energy

What is the value for (delta)G at 1000 K if (delta)H = -220 kJ/mol and (delta)S = -0.05 kJ/(molK)?A. -220 kJ
B. -270 kJ
C. 780 kJ
D. -170 kJ

Answers

The value of ΔG is -170 kJ/mol at 1000 K if ΔH is -220 kJ/mol and ΔS is -0.05 kJ/mol K.

Hence, option (D) is correct answer.

What is Gibbs Free energy ?

Gibbs free energy is also called free energy, free enthalpy, Gibbs energy which is used to measure the capacity of a system to do work in a  thermodynamic system. It is denoted by the symbol 'G'.

How to calculate the Change in free energy (ΔG) ?

To calculate the change in free energy as

ΔG = ΔH - T ΔS

where,

ΔG = Change in free energy

ΔH = Enthalpy change

T = Temperature in Kelvin

ΔS = Entropy change

Now put the value in above formula we get

ΔG = ΔH - T ΔS

     = -220 kJ/mol - (1000 K) (-0.05 kJ/mol K)

     = -220 + 50

     = -170 kJ/mol

Thus, from above conclusion we can say that The value of ΔG is -170 kJ/mol at 1000 K if ΔH is -220 kJ/mol and ΔS is -0.05 kJ/mol K.

Hence, option (D) is correct answer.

Learn more about the Gibbs Free energy here: brainly.com/question/13765848

#SPJ2
The system is isothermal, so we use the formula:
(delta)G = (delta)H - T (delta) S

Plugging in the given values:
(delta)G = -220 kJ/ mol - (1000K) (-0.05 kJ/mol K)
(delta)G = -170 kJ/mol

If we take a basis of 1 mol, the answer is
D. -170 kJ 
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