CHEMISTRY HIGH SCHOOL

How many grams of NaOH were dissolved to make a 1.25 L solution of 2.92 M NaOH?

Answers

Answer 1
Answer:

Answer:

  • 146. g

Explanation:

1) Data:

a) mass of solute = ?

b) volume of solution = 1.25 liter

c) M = 2.92 mol/liter

d) solute NaOH

2) Formulae:

a) Molarity, M = number of moles of solute / volume of solution in liters

b) mass in grams = molar mass × number of moles

3) Solution:

a) Calculate number of moles of solute:

  • M = number of moles of solute / volume of solution in liters

        ⇒ number of moles of solute = M × volume of solution in liters

        ⇒ number of moles of solute = 2.92 mol/liter × 1.25 liter = 3.65 mol

b) Molar mass of NaOH = 39.997 g/mol (you can take this number from internet or calculate it using the atomic masses of Na, O, and H).

c) Calculate the mass of solute:

  • mass in grams = molar mass × number of moles = 39.997 g/mol × 3.65 mol = 145.98905 g = 146. g

The answer must be reported with 3 significant figures, so it is 146. g.

Related Questions

As you move down group one of the periodic table, what happens to the atomic radii?
Yesterday we combined Hydrochloric Acid HCl with Sodium Hydroxide NaOH in a violent reaction that resulted in water H2O and common table salt NaCl. How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to write a chemical reaction, balance it, and then perform your calculation. also how many grams of salt NaCl will be produced and how many grams of water H2O be produced? 
In the unit cell of galena, six square faces of equal size each form 90 degree angles with every adjacent face. What type of crystal system is this?tetragonalhexagonaltricliniccubic
Which of the following would be the best name for MgCl2? magnesium chlorine magnesium chloride magnesium dichloride monomagnesium dichloride
What does the exosphere do??

List three of Rutherford’s major achievements that helped earn him the title “Father of Nuclear Physics.”

Answers

The correct answer is:

discovered the necleusproposed the proton existencediscovered fusion reaction from fission

Explanation:

Rutherford (1871–1937) was subject for an extraordinary array of discoveries in the fields of radioactivity and nuclear physics. He identified alpha and beta rays, set forth the rules of radioactive decay, and recognized alpha particles as helium nuclei.In 1911, Rutherford realized that atoms not detached, they are managed by something else, a nucleus. He noticed that the preponderance of an atom's mass is contemplated at a very tiny point in the center where the nucleus was determined. The nucleus is a positive force enclosed by electrons which are negative free flying particles.
discovered the necleus
proposed the proton existence
discovered fusion reaction from fission

Which nuclear decay emission has the weakest penetrating power?1. alpha particle
2. bera particle
3.gamma radiation
4. positron

Answers

Alpha particle is the nuclear decay emission that has the weakest penetrating power. The correct option among all the options that are given in the question is the first option or option "1". Gamma is a type of radiation and so can be negated as a particle. Alpha particles have the largest radiation and so the weakest penetrating power.

Write a balanced equation for each of the following reactions:the reaction of solid lithium with nitrogen to form solid lithium nitride.
the reaction between aqueous solutions of cobalt(III) nitrate and sodium hydroxide to form aqueous sodium nitrate and solid cobalt(III) hydroxide.
the reaction between solid zinc and aqueous hydrochloric acid in a single replacement reaction.
classify the reactions in (a) and (b).

Answers

Synthesis Reaction

6Li(s) + N₂(g) ⇒ 2Li₃N(s)

Double Replacement Reaction

Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s)

Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)

What is double replacement reaction?

  • A double-displacement reaction has the general formula AB + CD = AD + BC. Double-displacement reactions include the following examples: Ammonium Chloride, a salt, and sodium hydroxide, a base, combine to produce sodium chloride, hydrochloric acid, and water. In a double replacement process, the atoms of two compounds are switched, creating two new molecules.
  • Metals always replace metals, and nonmetals always replace nonmetals in single replacement processes.
  • Precipitates are frequently created by double replacement reactions when insoluble chemicals are created.
  • Checking to see if the cations exchanged anions with one another is the simplest technique to determine whether a reaction is a double displacement.
  • If the states of matter are mentioned, another indicator to look for is the production of a single solid product and watery reactants (since the reaction typically generates a precipitate)

To learn more about double replacement reaction, refer

brainly.com/question/23918356

#SPJ2
6Li(s) + N₂(g) ⇒ 2Li₃N(s) Synthesis Reaction

Co(NO₃)₃(aq) + 3NaOH(aq) ⇒ 3NaNO₃(aq) + Co(OH)₃(s) Double Replacement Reaction

Zn(s) + 2HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)

NEED HELP! ASAP 30 POINTS!!
Fill the blanks

Answers

Answer:

Explanation:

In ions, protons are never taken or given. Only the number of electrons are changed

Br^1- gains 1 electron, so the number of electrons increases from 35 to 36. No protons are taken away, to the number of protons and the atomic number of Br1- is still 35, and the number of neutrons is still 45.

What is the mass in grams of 1.73 moles CaH2

Answers

The mass of 1.73 moles CaH2 is 72.82 grams. The molar mass of CaH2 is 42.08 g/mol. This means that there are 42.09 grams in 1 mol. So, x grams will be in 1.73 mol of CaH2. Let's make a proportion: 42.09 g : 1 mol = x : 1.73 mol. x = 42.09 g * 1.73 mol : 1 mol. x = 72.82 g.

Given the parent compound, give the mass fragment that is evident in m/z 71. Include any hydrogen atoms and the charge.

Answers

I have attached the image that accompanied this question as well as the illustration that this question required.
Other Questions
Why does an ion have an electrical charge?
Aluminum metal reacts with aqueous iron(II) chloride to form aqueous aluminum chloride and iron metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients? Aluminum metal reacts with aqueous iron(II) chloride to form aqueous aluminum chloride and iron metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients? 3. 1. 4. 2.
Which statement about one atom of an element identifies the element?(1) The atom has 1 proton. (2) The atom has 2 neutrons.(3) The sum of the number of protons and neutrons in the atom is 3.(4) The difference between the number of neutrons and protons in the atom is 1.
Isomers have different molecular formulas. t/f