A precipitate forms when mixing solutions of sodium fluoride (NaF) and lead II nitrate (Pb(NO3)2). Complete and balance the net ionic equation for this reaction by filling in the blanks. The phase symbols and charges on species are already provided.
Complete and balance the net ionic equation for this reaction.

Answers

Answer 1

Answer:

See explanation

Explanation:

The molecular equation shows all the compounds involved in the reaction.

The molecular equation is as follows;

2NaF(aq) + Pb(NO3)2(aq) -------> PbF2(s) + 2NaNO3(aq)

The complete ionic equation shows all the ions involved in the reaction

The complete ionic equation;

2Na^+(aq) + 2F^-(aq) + Pb^2+(aq) + 2NO3^-(aq) -------->PbF(s) + 2Na^+(aq) +2NO3^-(aq)

The net Ionic equation shows the ions that actually participated in the reaction

The net ionic equation is;

2F^-(aq) + Pb^2+(aq)--------> PbF(s)


Related Questions

Write out the steps to finding the Empirical Formula.

Answers

Step 1: Determine the masses.
Step 2: Determine the number of miles by dividing the grams by the atomic mass.
Step 3: Divide the number of moles of each element by the smallest number of moles.
Step 4: Convert numbers to whole numbers.

ill give brainliest :D

how many grams of kcl are produced from 11.5 grams?

Answers

Answer:

approximately 15.1 grams.

Explanation:

The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want.

change 25 grams of potassium chlorate to moles.

calculate the gram molecular mass of potassium chlorate.

Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron.

1 K x 39 grams/mole

+1 Cl x 35.4 grams/ mole

+3 O x 16 grams/ mole

= 122.4 grams / mole Potassium Chlorate

25

122.4

= moles.

2.05 moles of Potassium Chlorate.

There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride.

2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride.

Find the gram molecular mass of Potassium Chloride.

1 K x 39 = 39

+1 Cl x 35.4 = 35.4

= 74.4 grams / mole.

2.05 moles x 74.4 grams/ mole = 15.2 grams

Answer:

idont know nalimotan ko hhhh...

16. A solution is made by dissolving 25 g of NaCl in enough water to make 1.0 L of solution. Assume the density of the solution is 1.0 g/cm3. Calculate the molarity and molality of the solution.

Answers

Answer:

The molarity will be "0.43 M" and molality will be "0.43 m".

Explanation:

Given that:

mass of NaCl,

= 25 g

Volume of solution,

= 1 L

Density of solution,

= 1 gm/cm³

Now,

The weight of solvent will be:

= [tex]Volume\times density[/tex]

= [tex]1\times 1[/tex]

= [tex]1 \ kg[/tex]

The mole of NaCl will be:

= [tex]\frac{mass}{Molar \ mass}[/tex]

= [tex]\frac{25}{58.44}[/tex]

= [tex]0.43[/tex]

hence,

The molarity will be:

= [tex]\frac{number \ of \ mole}{Volume \ of \ solution}[/tex]

= [tex]\frac{0.43}{1}[/tex]

= [tex]0.43 \ M[/tex]

The molality will be:

= [tex]\frac{mole \ of \ solute}{Weight \ of \ solvent}[/tex]

= [tex]\frac{0.43}{1}[/tex]

= [tex]0.43 \ m[/tex]

calculate the molecular mass of sodium trioxocarbonate (iv) decahydrate. hints (H= 1, C=12, O=16, Na=23​

Answers

Given :

A compound sodium trioxocarbonate (iv) decahydrate.

To Find :

The molecular mass of sodium trioxocarbonate (iv) decahydrate.

Solution :

We know, molecular formula of sodium trioxocarbonate (iv) decahydrate is :

Na₂CO₃.10H₂O

Now, we can calculate its molecular mass :

M = ( 2 × 23 ) + 12 + ( 3 × 16 ) + 10 × ( 1 × 2 + 16)

M = 46 + 12 + 48 + ( 10 × 18 )

M = 286 gram/mol

Hence, this is the required solution.

A 45-year-old woman comes to a clinic with complaints of morning stiffness in her ankle joints, worse on rising in the morning and improving during the day. Her discomfort is responsive to aspirin. She has also been fatigued and weak. During the last week, she has noticed that her wrist and ankle joints on both sides of her body are also painful and swollen. Blood is drawn to test for rheumatoid factor and antinuclear antibody. Synovial fluid is aspirated and analyzed. Results from analysis of the synovial fluid rule out crystal deposition diseases, such as gout and pseudogout, and no infectious microorganisms are seen.

Required:
a. What can be the possible cause of a false-positive RF assay?
b. Do the patient's clinical symptoms and laboratory results support a diagnosis 5. If so, what diagnosis would be the first choice, and why?

Answers

Answer:

In all the patients with rheumatoid arthritis RF is not present. It can also be witnessed in patients with conditions like hepatitis, bacterial endocarditis, and tuberculosis. Some of the reasons that can also produce false-positive results for RF assay are lipemic, hemolyzed, or heavily contaminated serum, other rheumatic diseases like systemic lupus erythematous, reading test results post the specified time of two minutes, and due to some of the chronic infectious diseases like hepatitis, tuberculosis, and syphilis.

b. The symptoms of the oatient like inflammation and pain in joints and the results of the lab indicate that the synovial fluid is drying and formation of crystal is taking place. These are the conditions that suggests the existence of rheumatoid arthritis.

c. In the given case, the first choice diagnosis would be the blood test that would show the presence of anti-CCP antibodies and the drying of synovial fluid. The presence of anti-CCP antibodies results in wear and tear in the joints, thus showing the diseased conditions.

plz help me asap i need this plz



Why is it sometimes not practical to use to scale models when representing objects in space?

Answers

I think it’s because from earth things may appear smaller smaller in space where in actuality in space it can be way larger

Who used scientific investigations to study atoms?
Check all that apply.
Dalton
Democritus
Rutherford
Thomson

Answers

Answer:

Rutherford used scientific investigation to study atoms.

Scientist who used scientific investigations to study atoms is Rutherford.

What are atoms?

Atoms are the basic fundamental or functional unit of any substance present in the nature.

Rutherford is also known as the father of nuclear physics and he did scientific investigation on the massive part of atom called nucleus he discovered that there are two types of radiation, coming from the uranium atom are alpha and beta particles.

Scientific investigation is a method in which scientist will study, perform and observe results for the experiment.

Hence Rutherford used scientific investigation.

To know more about Scientific investigation, visit the below link:
https://brainly.com/question/17216882

What are 3 different ways we can preserve our ecosystem and what makes your 3 ways effective?

Answers

Answer:

1. Stop throwing trash and bottles in lakes because it can have our animals live longer and not have issues

2. Reducing the number of bags you use from the store because they can end up being on the ground and cause plenty of damage around us

3. probably trying not to having fires because there is alot of problems that are happening like the wildfires in californa which is leading to our animals and trees dying

hope this helps

have a good day :)

Explanation:

4- 4110 kg of R-134a at 300 kPa fills a rigid container whose volume is 14 L. Determine the temperature and total enthalpy in the container. The container is now heated until the pressure is 600 kPa. Determine the temperature and total enthalpy when the heating is completed.

Answers

The correct question is: 10 kg of R-134a at 300 kPa fills a rigid container whose volume is 14 L. Determine the temperature and total enthalpy in the container. The container is now heated until the pressure is 600 kPa. Determine the temperature and total enthalpy when the heating is completed.

Answer: The temperature is [tex]21.6^{o}C[/tex] and total enthalpy when the heating is completed is 300 kJ.

Explanation:

Given: Mass = 10 kg

Volume = 14 L

Final pressure = 600 K

First, convert volume from L to [tex]m^{3}/kg[/tex] as follows.

[tex]v_{1} = \frac{14 \times 10^{-3}}{10}\\= 0.0014 m^{3}/kg[/tex]

According to the R-134a tables at 300 kPa and [tex]0.0014 m^{3}/kg[/tex].

[tex]h_{1}[/tex] = 54.6 kJ/kg

[tex]T_{sat}[/tex] = 0.7 C

[tex]u_{1}[/tex] = 54.1 kJ/kg

Now, at the state 2 [tex]p_{2}[/tex] = 600 kPa and [tex]v_{2} = v_{1} = 0.0014 m^{3}/kg[/tex]

This means that the final temperature at state 2 is [tex]T_{2} = T_{sat} = 21.6^{o}C[/tex]

Hence, the change in enthalpy is calculated as follows.

[tex]\Delta H = m(h_{2} - h_{1})\\= 10(84.6 - 54.6)\\= 300 kJ[/tex]

The first law is applied to transfer the heat transfer as follows.

[tex]Q = m(u_{2} - u_{1})\\= 10(83.8 - 54.1) kJ\\= 297 kJ[/tex]

Thus, we can conclude that the temperature is [tex]21.6^{o}C[/tex] and total enthalpy when the heating is completed is 300 kJ.

A water bottle is cooled to -115c. What is the new pressure

Answers

.........................................................................

Answer:

129

Explanation:

best way to hump girls

Answers

Answer:

When they're sleeping

Explanation:

After they've been drugged

What is the molality of a solution containing 15 g NaCl dissolved in 50 g of water

Answers

Answer:

cdjkekendnekekekeknenwkwkwkwnrnrnrjejjwjwksnsjnrheifjfuufjeenenej

Hopes this helps:

Answer: 5.132 mol/kg

How I got the answer I looked it up. Please mark as brainlist if it’s right.

If 6.75 g of NaOH are dissolved in 50.00 g of water and the temperature increases from 20.5°C to 47.8 °C.

a. Is this an example of an endothermic or exothermic reaction?

b. What is the q for the reaction? (Remember since the NaOH dissolves in water add the masses to get the m)

c. How many moles of NaOH are dissolved?

d. What is the ΔH for the reaction?

Answers

Explanation:

Have a good luck with ur exam

If a sample has a mass of 1.25 x 102 g and a volume of 51 mL, what is its density?

Answers

Answer:

2.45 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]d = \frac{m}{v} \\ [/tex]

We have

[tex]d = \frac{1.25 \times {10}^{2} }{51} \\ = 2.45098..[/tex]

We have the final answer as

2.45 g/mL

Hope this helps you

4. Suppose in the first part of the experiment you did not heat strong enough to
decompose the potassium chlorate, how would this affect your result?​

Answers

when you strongly heat the potassium chlorate it leaves oxygen if you'll not heat it strongly to decompose it the oxygen would not release and the compound will remain thermally unstable.

Heating of Potassium Chlorate results into decomposition of Potassium Chloride and Oxygen gas.

When KClO₃ is heated strongly, it breaks down, releasing oxygen gas and leaving behind a thermally stable (i.e., heat-insensitive) solid residue of an ionic potassium compound.

If enough heat is not provided to potassium chlorate then it will not decompose into its substituent products and also some of the potassium chloride product splattered out of the crucible during the heating process.

Learn more:

brainly.com/question/12959023

How many isomers are there with the following descriptions? Alcohols with the formula ‍ ‍ Answer Two Bromoalkanes with the formula ‍ ‍ Answer

Answers

Answer:

Three isomers

Isomer I  CH3-CHOH - CH3

Isomer 2 CH2OH-CH2-CH3

Isomer 3  CH3-CH2-CH2OH

Explanation:

Complete question

How many isomers are there with the following descriptions?

a) Alcohol with formula C3H8O

Solution

There are total 3 carbon atoms in this alcohol. Hence, there will be three isomers of Alcohol with formula C3H8O .

The three isomers will comprise of alcohol group (OH) attached to the three carbon atoms one by one.

Isomer I  CH3-CHOH - CH3

Isomer 2 CH2OH-CH2-CH3

Isomer 3  CH3-CH2-CH2OH

What are the safety procedures for nuclear accidents nowadays?

Answers

Explanation:

Take shelter in a hard wall building

Close doors and windows cut off ventilation

8x10^-200 in significant figures PLEASE IVE BEEN STUCK ON IT FOR 2 HOURS

Answers

i got 0 ?? if that’s any help

Observe: Click Reset (). The electrons in the outermost orbit, called valence electrons, help to create chemical bonds. Create a lithium atom (3 protons, 4 neutrons, 3 electrons). How many valence electrons are in a neutral lithium atom?

Answers

Answer:

There is one valence electron in a neutral lithium atom.

Explanation:

The number of valence electrons in a neutral lithium atom is equal to one.

What is a valence electron?

Valence electrons can be described as the electrons filling the outermost shell of an atom while the electrons in the inner shell of an atom are known as core electrons. Lewis structures are used to determine the number of valence electrons and know the types of chemical bonds.

Valence electrons of an atom can be filled in the same or different orbitals and these electrons are responsible for the interaction between atoms and cause the formation of chemical bonds.

Only electrons occupied in the outermost shell can participate in the formation of a bond or a molecule and are responsible for the reactivity of the element.

The number of electrons in the neutral atom of lithium is 3. There is only one electron present on the outermost shell 2s-orbital.

Learn more about valence electrons, here:

brainly.com/question/18612412

#SPJ5

If the half-life of Carbon-14 is 5700 years, how many years would it take a sample to decay from 1 gram to 31.3 mg

Answers

Answer:

28500 years

Explanation:

Applying,

A = A'([tex]2^{x/y}[/tex])............... Equation 1

Where A = Original mass of Carbon-14, A' = Final mass of carbon-14 after decaying, x = total time, y = half-life.

From the question,

Given: A = 1 g, A' = 31.3 mg = 0.0313 g, y = 5700 years.

Substitute these values into equation 1

1 = 0.0313([tex]2^{x/5700}[/tex])

[tex]2^{x/5700}[/tex] = 1/0.0313

[tex]2^{x/5700}[/tex]  = 31.95

[tex]2^{x/5700}[/tex] ≈ 32

[tex]2^{x/5700}[/tex] ≈ 2⁵

Equating the base and solve for x

x/5700 ≈ 5

x ≈ 5×5700

x ≈ 28500 years

4. Which should be done after a volcanic eruption?
A. Go to your neighbor.
B. Prepare your emergency kit.
C. Ignore what is happening around.
D. Stay in the evacuation center until it is safe to return.
5. Which is NOT true about volcanic preparedness?
A. Make a plan.
B. Prepare an emergency kit.
C. Cover your nose with a damp cloth.
D. Do not follow the instructions of the authorities.​

Answers

Answer:

4. D sounds like the best option.

5. D is the correct answer.

Explanation:

You're Welcome

Brainiest if you are correct and this is a Test I just need help on the last one.

Answers

Answer:

Explanation

i k the ansewer

frequency is low and energy level is low

g If 50.0 mL of a 0.75 M acetic acid solution is titrated with 1.0 M sodium hydroxide, what is the pH after 10.0 mL of NaOH have been added

Answers

Answer:

pH = 2.66

Explanation:

Acetic Acid + NaOH → Sodium Acetate + H₂O

First we calculate the number of moles of each reactant, using the given volumes and concentrations:

0.75 M Acetic acid * 50.0 mL = 37.5 mmol acetic acid1.0 M NaOH * 10.0 mL = 10 mmol NaOH

We calculate how many acetic acid moles remain after the reaction:

37.5 mmol - 10 mmol = 27.5 mmol acetic acid

We now calculate the molar concentration of acetic acid after the reaction:

27.5 mmol / (50.0 mL + 10.0 mL) = 0.458 M

Then we calculate [H⁺], using the following formula for weak acid solutions:

[H⁺] = [tex]\sqrt{C*Ka}=\sqrt{0.458M*1.76x10^{-5}}[/tex][H⁺] = 0.0028

Finally we calculate the pH:

pH = -log[H⁺]pH = 2.66

Look at the table of dissociation constants for some acids.

Acid Ka Acetic acid 18 x 10-6 1.2 x 10-2 Chlorous acid Nitrous acid 4.0 x 10 -4 Propionic acid 1.3 x 10-5

Which of these is the strongest acid?

acetic acid
chlorous acid
nitrous acid
propionic acid

*Answer is B*​

Answers

Answer:

chlorous acid

Explanation:

The acidic equilibrium of weak acids, HX, occurs as follows:

HX ⇄ H+ + X-

Where Ka is written as:

Ka = [H+] [X-] / [HX]

The strongest acid is the acid that produce more H+. The acid with the higher Ka is the acid that produce more [H+] and is, thus, the strongest acid.

The higher Ka is the Ka of chlorus acid = 1.2x10-2

Right answer is:

chlorous acid

Answer:

chlorous acid :)

Explanation:

5. Calculate the number of molecules of carbon tetrachloride in 0.32 mol of
carbon tetrachloride.

Answers

To Find :

The number of molecules of carbon tetrachloride in 0.32 mol of

carbon tetrachloride.

Solution :

We know, 1 mole of any element/compound contains [tex]6.022 \times 10^{23}[/tex] number of atoms/molecules.

So, Number of molecules in 0.32 mol are :

[tex]n = 0.32 \times 6.022 \times 10^{23}\\\\n = 1.93 \times 10^{23}[/tex]

Therefore, number of molecules of carbon tetrachloride in 0.32 mol of

carbon tetrachloride are [tex]1.93 \times 10^{23}[/tex].

A mixture contains 5.0 g of He, 1.0 g of Ar, and 3.5 g of Ne. Calculate the partial pressure of each gas in the mixture at STP and total pressure of mixture.

Answers

Answer:

Total pressure of the mixture = 1 atm

Partial pressure of He = 0.863 atm

Partial pressure of Ar  = 0.0173 atm

Partial pressure of Ne = 0.1197 atm

We confirm that the sum of partial pressure of each gas valu

Explanation:

STP conditions are:

1 atm of pressure and

273K of T°

We can also say that those value reffers to 1 mol.

We determine the moles of each:

5 g . 1mol / 4g = 1.25 moles of He

1g . 1mol / 39.9 g = 0.0250 moles of Ar

3.5g . 1mol / 20.18 g = 0.173 moles of Ne

Total pressure of a mixture can be obtained from the Ideal Gases Law.

P . V = n . R . T

Total moles: 1.25 + 0.025 + 0.173 = 1.448 moles

But now, we need the volume. We know that 1 mol is contained at 22.4L at STP.

1.448 mol . 22.4L / 1 mol = 32.4 L

That's the volume for our mixture. We replace:

32.4 L . P  = 1.448 mol . 0.082 . 273K

P = (1.448 mol . 0.082 . 273K) / 32.4L = 1 atm

Now we can obtained the partial pressure of each gas from mole fraction

Mol of gas / Total pressure = Partial pressure of gas / Total pressure

Partial pressure of He = (1.25 / 1.448) . 1 atm = 0.863 atm

Partial pressure of Ar = (0.025 / 1.448) . 1 atm = 0.0173 atm

We know that sum of partial pressure is 1 - (Mole fraction He + Mole fr. Ar)

Partial pressure of Ne = 1 - (0.863 + 0.0173) = 0.1197 atm

We confirm that the sum of partial pressure of each gas values the total pressure of the mixture: 0.863 + 0.0173 + 0.1197 = 1

Difference between brain and spinal cord
Pls help

Answers

They are both part of the nervous system but the brain is housed inside the skull and it controls most of the activities of the body. In higher organisms such as humans and other vertebrates, it is the centre of learning. Then the spinal cord is a tube-like structure that begins from the end of the brain and ends at the bottom of the backbone. The spinal cord is made up of nerves that carry information between the brain and the rest of the body.
The brain is housed inside the cranium and the spinal cord is enclosed inside the vertebral column

How many grams are in 0.375 mol LiBr? (MM LiBr=86.85 g/mol)
O 32.6 g
O 0.00315 g
O 0043 g
O 86.8 g

Answers

Answer:

32.57g

Explanation:

mass = mole x molar mass

mass of LiBr = 0.375 x 86.85

mass = 32.57g

g 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid sodium azide (NaN3) into solid sodium and gaseous dinitrogen.

Answers

Answer: A balanced chemical equation, including physical state symbols, for the decomposition of solid sodium azide ([tex]NaN_{3}[/tex]) into solid sodium and gaseous dinitrogen is [tex]2NaN_{3}(s) \rightarrow 2Na(s) + 3N_{2}(g)[/tex].

Explanation:

A chemical equation which contains same number of atoms on both reactant and product side is called a balanced chemical equation.

For example, [tex]NaN_{3}(s) \rightarrow Na(s) + N_{2}(g)[/tex]

Here, number of atoms present on reactant side are as follows.

Na = 1N = 3

Number of atoms present on product side are as follows.

Na = 1N = 2

To balance this equation, multiply [tex]NaN_{3}[/tex] by 2 on reactant side. Also, multiply Na by 2 and [tex]N_{2}[/tex] by 3 on product side.

The equation will be rewritten as follows.

[tex]2NaN_{3}(s) \rightarrow 2Na(s) + 3N_{2}(g)[/tex]

This equation contains same number of atoms on both reactant and product side. Hence, this equation is now balanced.

The symbols (s) and (g) depicts the physical state of substances present in the equation as solid and gas.

Thus, we can conclude that balanced chemical equation, including physical state symbols, for the decomposition of solid sodium azide ([tex]NaN_{3}[/tex]) into solid sodium and gaseous dinitrogen is [tex]2NaN_{3}(s) \rightarrow 2Na(s) + 3N_{2}(g)[/tex].

Question 18 (Multiple Choice Worth 2 points)
(12.02 LC)
What type of adaptation relates to the stages of growth and reproduction of plants?
Inherited trait
O Life cycle difference
O Learned behavior
O Physical characteristic

Answers

Answer:

the answer should be Life Cicle Difference.

Answer: Option (D) Is the correct  Life cycle difference

Explanation: Hope it helps!

Good luck!!!

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