Chemistry High School

please solve ...................................................................

Please Solve ...................................................................

Answers

Answer 1

Answer:

Explanation:

Part (c)

Mix together two suitable solutions.

Use filtration to separate the precipitate as a residue from the solution.

Wash the precipitate with distilled water while it is in the filter funnel.

Leave the washed precipitate aside or in a warm oven to dry.

Part (d)

Pb(NO3)2 (aq) + Na2SO4 (aq) → 2 NaNO3 (aq) + PbSO4 (s)

Related Questions

Determine the number of moles of O,(g) in the cylinder. The gram-formula mass of
Og (g) is 32.0 g/mol.

Answers

The number of mole of oxygen gas, O₂ in the cylinder given the data is 0.5 mole

Description of mole

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

How to determine the mole of O₂

From the question given, the following data were obtained:

Mass of O₂ = 16 g gMolar mass of O₂ = 32 g/mol Mole of O₂ =?

Mole = mass / molar mass

Mole of O₂ = 16 / 32

Mole of O₂ = 0.5 mole

Complete question

See attached photo

Learn more about mole:

https://brainly.com/question/13314627

#SPJ1

What is the speed of light written in standard numerical form?

Answers

Hello there, the answer is

What happens when a solid is dissolved into a liquid?
O Solid particles float toward the surface layer of liquid particles.
O Solid particles sink down toward the bottom layer of liquid particles.
O Solid particles become evenly dispersed among liquid particles.
O Solid particles become suspended in the middle of liquid particles.

Answers

When a solid dissolves in a liquid to form a solution, solid particles become evenly dispersed among liquid particles.

What are solutions?

Solutions are formed when a solute particle dissolves in another substance known as a solvent.

Usually, solutions are formed when solids dissolve in liquids.

The solid is the solute while the liquid is the solvent.

When a solid dissolves in a liquid, solid particles become evenly dispersed among liquid particles.

Therefore, solutions are formed when solute particles dissolve in solvents.

Learn more about solutes and solutions at: https://brainly.com/question/25326161

#SPJ1

Answer:

c

Explanation:

chem ed 2022

Select all that apply.

When the products of a reaction have a higher enthalpy than the reactants:

The change in enthalpy is positive.
The reaction is exothermic.
The reaction is endothermic.
The change in enthalpy is negative.

Answers

When the enthalpy of products is higher than that of reactants, such a reaction is said to be endothermic.

Enthalpy

The enthalpy of a system refers to the heat content of the system.

When the enthalpy of reactants is higher than that of products in a reaction, such a reaction is said to be exothermic. On the other hand, if the enthalpy of products is higher than that of the reactants, it is endothermic.

More on the enthalpy of systems can be found here: https://brainly.com/question/13996238

#SPJ1

Draw a diagram using H+ signs and OH- symbols of a solution that is acidic. Hint: Use the
diagram seen in the prelab.



WILL MARK BRAINLIEST!!!!

Answers

More positive ions shows acidic whereas more negative ions indicates basic solution.

Which charge show acidic solution?

That side which has more positive charges is considered as acidic solution while on the other hand, that region where negative charges are present in large number as compared to positive charges is considered as basic or alkaline solution.

So we can conclude that more positive ions shows acidic whereas more negative ions indicates basic solution.

Learn more about charge here: https://brainly.com/question/25923373

#SPJ1

The following chemical reaction
2H2O + 3HCl ——> 5H2O + Cl

how many moles of H2O is needed to make 3 moles of HCl?

Answers

Answer: 2 moles

Explanation:

We know from the equation that for every 3 moles of HCl consumed, 2 moles of water are consumed (based on the coefficients)

So, the answer is 2 moles.

Which information must be known about a compound to find the molecular formula from the empirical formula?

Answers

Answer:

Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.

hope this helps :3

A company is announcing the construction of a new skyscraper to the public. Which model will give the best idea of how the new building will change the city skyline?
A.
a drawing showing the interior of the building
B.
a full scale, three-dimensional model of the building
C.
a rough sketch of the building's shape
D.
a drawing showing both the new and old buildings

Answers

Answer:

D.

Explanation:

This is because this option would allow one to see the sorroundings of the new building. The others only give perpectives on what the new building looks like, isolated from its sorroundings.

What is the ph of a solution with a hydroxide (oh) concentration of 2.02e-5?

Answers

Answer:

The solution has a pH value of 9.3.

Explanation:

To solve this problem, we can first determine the H+ ion concentration and then use this value to calculate the pH. To find the H+ ion concentration from the OH- ion concentration, we should use Kw, which we know has a value of 1 * 10^(-14).

We can then use the following formula to solve for [H+]:

Kw = [H+][OH-]

10^(-14) = (2.02 * 10^(-5)) * [H+]

[H+] = 4.950495 * 10^(-10)

Now, we can find the pH using the formula pH = -log[H+].

pH = - log[H+]

pH = - log(4.950495 * 10^(-10))

pH = 9.3

Therefore, the correct answer is that the pH of the solution is 9.3. Note that an alternative way to solve the problem is to find the pOH from the OH- ion concentration and use the resulting value to determine the pH that way instead.

Hope this helps!

If an object goes through a chemical reaction but does not change in mass that object has

Answers

Answer:

The law of conservation of mass

Explanation:

The law of conservation of mass

When comparing voltaic cells to electrolytic cells, oxidation occurs at the.

Answers

When comparing voltaic and electrolytic cells oxidation occurs at both the anode and the cathode.

What is an electrolytic cell?

In an electrolytic cell, the reaction is non-spontaneous so it requires some input of energy for it to function while for a voltaic cell, the reaction is spontaneous.

Oxidation occurs at the anode and reduction occurs at the cathode.

Thus, when comparing voltaic and electrolytic cells oxidation occurs at both the anode and the cathode.

Learn more about electrolytic cells here:

brainly.com/question/4030224

#SPJ1

does lotus have shiny or dull body surface​

Answers

Yes, it is true that the plant known as Lotus has a shiny surface.

What is Lotus?

This is referred to a type of plant which grows in mud and has micron- and nano-scale features.

It has a wax like surface which prevent dirt and water adhesion thereby making its surface to also be shiny and attracts insects for pollination in this regard.

Read more about Lotus here https://brainly.com/question/2028238

#SPJ1

how to Use your trend line to estimate the gas pressure of this system at 0°C.

Answers

Answer:

The slope of the trend line is 2.55; as the temperture.

Explanation:

What is the formula for the ether functional group?

Answers

The formula for the functional group of ether is R–O–R– group. Details about functional group can be found below.

What is a functional group?

A functional group is a specific grouping of elements that is characteristic of a class of compounds, and determines the chemical properties of that class.

Ether is any of a class of organic compounds containing an oxygen atom bonded to two hydrocarbon groups.

Therefore, the formula for the functional group of ether is R–O–R– group.

Learn more about ether at: https://brainly.com/question/23537178

#SPJ1

How do chemical weathering and deposition contribute to the formation of the features shown here?

Answers

Chemical weathering is decomposition of rock caused by chemical reactions resulting in formation of new compound. Weathering breaks down and loosens the surface minerals of rock. Hence, the broken rocks are transported to another place where it decomposes and forms soil. Therefore weathering is important for soil formation. Chemical weathering is decomposition of rock caused by chemical reactions resulting in formation of new compound.

Explain how each property affects the energy in a wave:
Amplitude:
Wave speed:
Wavelength:
Frequency:

Answers

Answer:Amplitude:the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.Wave speed:Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known.Wavelength:Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire. In wireless systems, this length is usually specified in meters (m), centimeters (cm) or millimeters (mm).Frequency:frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.

Explanation:

Determine the number of neutrons in 20 grams Uranium-238

Answers

Answer:

146 neutrons

Explanation:

The atomic number of uranium (see periodic table) is 92, and the mass number of the isotope is given as 238. Therefore, it has 92 protons, 92 electrons, and 238 — 92 : 146 neutrons.

A sample of gas at a constant temperature has an initial volume of 14.5L at a pressure of 720mmHg. If the volume of gas is decreased to 10.5L, what is its pressure?

Answers

The new pressure of the gas would be 994 mmHg

Gas law

According to Charle's law, the pressure of a gas at a constant temperature varies inversely with its volume.

Mathematically: p1v1 = p2v2, where p1 and p2 = initial and final pressure, and v1 and v2 = initial and final volume.

In this case, v1 = 14.5 L, p1 = 720 mmHg, and v2 = 10.5 L

p2 = p1v1/v2 = 720 x 14.5/10.5 = 994 mmHg

More on Charle's law can be found here: https://brainly.com/question/16927784

#SPJ1

Which two statements describe how volcanic activity can affect Earth's crust?
A) A volcano are most likely to form near the center of tectonic plates

B) A volcanic mountain becomes smaller each time it erupts

C) A volcano can suddenly get taller every time it erupts

D) Hot magma from inside earth is released at weak points in the crust

Answers

Answer:

D

Explanation:

The weak crust of the earth does not hold together as well as strong crust.

Answer:

A and B was right in our test.

Explanation:

A was: A volcano can suddenly get taller every time it erupts

B was: Hot magma from inside Earth is released at weak points in the crust.

Alkaline batteries are non-rechargeable.
Why do alkaline batteries eventually stop working?

Answers

Answer:

Alkaline batteries stop working when all of the manganese dioxide has been converted.

Explanation: Hope it helps you :)))

Have a good day

Alkaline batteries eventually stop working because the chemicals inside them react and eventually use up all their energy.

The chemicals in an alkaline battery are zinc and manganese dioxide, which are separated by a separator. When the battery is used, zinc and manganese dioxide react to produce electricity.

The reaction between zinc and manganese dioxide is a one-way reaction, meaning that it cannot be reversed. This means that once the chemicals in the battery are used up, the battery will no longer produce electricity.

The rate at which an alkaline battery loses its charge depends on a number of factors, including the temperature, the amount of current being drawn from the battery, and the age of the battery.

In general, alkaline batteries will last longer in cool temperatures and when they are not being used heavily.

To know more about Alkaline batteries:

https://brainly.com/question/27850717

#SPJ3

The vapour pressure of water 12.3kPa at 300K. Calculate the vapour pressure of 1 molal solution of a non-volatile solute in it.

Answers

Answer:

ywhehehehehdgdudcdudcd uy dshdcvv

Explanation:

bdbdkzkzjzdkdkzdvdisisksjskakskskzbx vxydcdudschahahbshshs

How can we tell the distance sediments traveled due to erosion ?​

Answers

Answer:

more rounded the grains are the more they have been moved around

Explanation:

Generally – the more rounded the grains are the more they have been moved around (i.e. the longer the length of time or distance they have moved). Angular grains cannot have travelled far

geolsoc.org.uk

Describe the difference between the rate of diffusion seen for sodium and urea.

Answers

Urea is diffused more slowly because it’s larger than sodium.

Which of these is a challenge related to nuclear fusion reactions?
A. Waste products have a longer half-life.
B. It is technically challenging to create these reactions safely and
efficiently.
C. The fuel for nuclear fusion is less available than uranium-235.
D. There is less of a chance of runaway chain reactions.

Answers

Answer:B

Explanation:got it right

The statement, "It is technically challenging to create nuclear fusion reactions safely and efficiently", is related to nuclear fusion reaction. Thus, Option B is correct.

This is due to the need to reach and maintain the extreme temperatures and pressures required for the reaction to occur and to confine and control the plasma in which the reaction takes place.

Nuclear fusion is a promising source of energy that has the potential to provide abundant, clean & sustainable power. However achieving nuclear fusion requires overcoming several challenges including the technical difficulties of creating and controlling the extreme conditions required for the reaction to occur.

Fusion reactions can produce high-energy neutrons that can damage the materials used to contain the reaction and require special handling and disposal. While progress has been made in developing fusion technologies, there is still much work to be done to make fusion a viable source of energy for the future.

Learn more about nuclear fusion reactions brainly.com/question/25387647

#SPJ1

An atom's electron configuration ends with 3p^3. if another atom has nine more electrons, what would be the continuation of the electron configuration?

Answers

The continuation of the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]

What is an electron configuration?

Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.

The initial p-orbital (the [tex]3p^3[/tex]) is incompletely filled. Thus, the first thing would be to fill it completely ([tex]3p^6[/tex]) so as to obey the orbital-filling rule. This leaves 6 more electrons.

After 3p orbital, the next orbitals are 4s, 3d, 4p, 5s, etc.

The 4s orbital will take a maximum of 2 electrons, leaving 4 more electrons.

Next would be the 3d orbital which can take a maximum of 8 electrons, but only 4 electrons are left.

Thus, the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]and elements is Vanadium (V).

Learn more about the electron configuration here:

brainly.com/question/13497372

$SPJ1

If 8. 0 ml of water is added to 2. 0 ml of a 0. 500 m koh solution, the concentration of koh is changed to.

Answers

Answer: 0.1 M

Explanation:

Originally, [tex]0.500=\frac{\text{moles of solute}}{0.002}[/tex], so there was 0.001 mol of KOH.

Now, there is 8.0+2.0=10.0 mL of solution, so the new concentration is:

[tex]\frac{0.001}{0.01}=\boxed{0.1 \text{ M}}[/tex]

The begining of this chemical equation represents the starting materials for a chemical reaction
which compound us likely produced by the chemical reaction H20+ SO3

Answers

H2S04 is the answer to this question

What is the volume of a gas if 0.182 moles of the gas is at 1.99 atm and 83.4oC?

Answers

Answer:

2,67 L

Explanation:

How many grams are in 4 moles of H2O?​

Answers

Answer:

There are 72grams in 4 moles of H20

Which statements describe proper use of a filter funnel?

Answers

Answer:

Fold the filter paper in fourths before placing it in the funnel and pour all the liquid through the funnel.

Other Questions
The spelling checker included with word processing software compares words in a document with an electronic dictionary that is part of the operating system. Group of answer choices True False Select ALL situations for which only zero or positive solutions make sense. Question 14 of 20Which is one benefit of getting a job after graduating high school?A. A person with a high school degree earns less than someone witha college degree over time.OB. A person with a high school degree can enter the job market andstart earning money immediately.C. A person with a college degree earns more than someone with ahigh school degree over time.OD. A person who goes to earn a college degree will have to pay thefull costs of going to college. do you like the caste system? What is the difference between an orthophoto and a Topographic map What kind of pronoun is himself? To rewrite this passage of text in the past simple tense and past continuous tense. you run across the road, but a car comes by and nearly knocks you down. you race to the corner of the street, then leap over a small, green hedge. you see your friend, billy. he darts towards you, then you both run towards me. i join in, and i tear along the road next to you. all three of us reach billy's house and speed up the path to his front door. we arrive at the door, then ring the doorbell. billy's mum answers, then lets us in for a drink of orange squash. 27 Which describes how the data for word 2 should be plotted on a coordinate grid? From the origin, go 2 units to the right and 9 units up. From the origin, go 2 units to the right and 12 units up. From the origin, go 9 units to the right and 12 units up. From the origin, go 12 units to the right and 9 units up. Which of the following numbers is equal to the value shown in scientificnotation below?1.9 x 10-2A.0.0019B.0.019C.0.19D. 0.00019 when factoring the following trinomial,you need two numbers that multiply to equal "-24" and add to "-10" choose the two correct numbers6-8-34-6-41238-2-122 The type of account and normal balance of unearned consulting fees is. Select the three areas in which it would be most important for an instructional designer to be trained. psychology psychology computer applications computer applications educational theory educational theory business management business management sales and marketing sales and marketing] Which lists only abiotic factors in this environment?grass, tree, rock, soilbird, turtle, grass, treesun, water, grass, soilwater, rock, soil, sun BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!The table shows the relationship between the time and distance a car travels. What is the missing value?Hours Miles1 552 1103 1654 ? Including soluble fiber into your diet can __________.A. digest amino acidsB. digest celluloseC. raise cholesterol levelsD. lower cholesterol levels Find the least number which when divided by 6, 15 and 18 leave remainder 5 in each case. ( pls answer fast ) Which value of w makes this equation true?[tex]\frac{5w + 4 }{3} = \frac{3w}{2} Allowing a foreign organization to take charge of manufacturing and distributing a product in its country or world region in return for a negotiated fee is ______. No matter how many paragraphs are in an essay, each one of them should directly relate to the main topic and support the thesis statement.TrueFalseBackNext n music, a quaver is one-eighth of a semibreve (whole note). What fraction of a semibreve is a hemidemisemiquaver? (Hint: hemi-, demi-, and semi- are prefixes each of which represents a multiplication by one-half).