1. Which of the following is a mechanical mixture?
A. shampoo
B. chocolate chip cookie dough
C. tap water
D. air

Answers

Answer 1
A? i think im right but sorry if im not

Related Questions

10. Which of the following is an example of a
chemical change?
A. burning a scented candle
B. cutting an apple into slices
C. freezing liquid water into an ice cube
D. melting a stick of butter to pour over popcorn

Answers

A because burning is a chemical reaction since you can’t undo It

What is a solution?

Two solutes mixed together

A solute and solvent mixed together

A solute or solvent by themselves

Two solvents mixed together
oc
d

Answers

Answer:

A solute and a solvent mixed together.

Explanation:

A solution is a solute and a solvent mixed together. An example would be salt water. Salt would be the solute (the thing that's getting dissolved) and water would be the solvent (the thing that does the dissolving)

How many grams of Fe2O3 can be produced from 180 g Fe ?

Answers

Answer:

257.6 grams

Explanation:

first write the formula: 4Fe + 3O2 -> 2Fe2O3

Fe molar mass is 55.8

180/55.8 = 3.226 mols

devide 3.226 by 4, then multiply by 2 which gives us 1.61 mols Fe2O3

Fe2O3 molar mass is 160

1.61 mols * 160 = 257.6 grams

During the electrolysis of molten sodium chloride, which ion discharges at the anode?

Answers

Answer:

it should be chlorine gas

Explanation:

Use the ideal gas law to find the volume that 4.30 mol of oxygen gas occupies at 99.7 kPa and 35.0 °C.
help please

Answers

According to the ideal gas law, 4.30 molecule of o2 occupies 0.11 m³ at 99.7 kPa with 35.0 °C.

What is a straightforward definition of ideal gas law?

The relationship between a gas's pressure P, volumes V, and t in the range between low pressures and extremely high temperatures, when the gas's water moves virtually independently of one another, is known as the ideal gas, also known as the perfect gas law.

PV = nRTp = pressure in PaV

= volume in m³n = number of molesR

= molar gas constant (8.31 JK⁻¹mol⁻¹)T

= temperature in Kpressure ⇒ 99.7 × 10³ Pa

temperature ⇒ 35.0 + 273 = 308

KpV = nRT

= 99.7×10³×V= 4.30×8.31×308V

=(4.30×8.31×308)/(99.7×10³3 )V

= 0.11 m­³

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PLSSSS HELP Humus is made of ___________? (Select all that apply.)
mineral deposits
bedrock
microorganisms
organic material
inorganic material
insects

Answers

Answer

I'm pretty sure it would be (Insects, and microorganisms)

Explanation:

If its not correct I'm sry

Answer:

it would be Insects, and microorganisms

Explanation:

I finished the quiz minute ago

Help!!!

1.
Q: How does the distillation apparatus remove impurities from water?

Q: Why does water vapour condense in the condenser tube?

Q: As the boiling animation neared the end, what does the change in the proportion of particle types in the boiling flask indicate about the impurities?

Answers

Answer:

Q1) Distillation relies on evaporation to purify water

Explanation:

contaminated water is heated to form steam. inorganic compounds and large non-volatile organic molecules do not evaporate with the water and are left behind. The steam then cools and condenses to form purified water

46 g of glycerin were dissolved in 100 g of water. What is the freezing point of this solution?


Additional information:
М(С3Н5(ОН)3) = 92 g/mol;
Тf(Н2О) = 273.15 К;
Кf = 1.86 kg⋅К/mol.

Answers

Based on the formula to determine the freezing point depression of the solvent, the freezing point of the solution is 263.85 K.

What is the freezing point of a substance?

The freezing point of a substance is the temperature at which the liquid changes to solid without any further decrease in temperature occurring during the process.

The addition of solute substances in liquids usually lowers the freezing point of the liquid solvent.

The formula to determine the freezing point depression of solvent is given below:

ΔT = i * Kf * m

where'

ΔT is the change in freezing point,i is the van't Hoff factor,Kf is the freezing point depression constant, andm is the molality of the solution.

The molality of the given solution = moles of solute/kg of solvent

moles of solute = 46/92

mass of solvent = 100 g or 0.1 kg

Molality of solution = (46/92) / 0.1

Molality of solution = 5

for glycerine, i = 1

ΔT = ΔT = 1 * 1.86 * 5

ΔT = 9.3

The freezing point of the solution = 273.15 - 9.3

The freezing point of the solution = 263.85 K

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Match each phylum with the correct description
cnidarians
internal skeletons made of hardened plates
echinoderms
radial symmetry and stinging cells
arthropods
jointed body parts and an external skeleton
annelids
segmented body and closed circulatory
system

Answers

Answer:

:) Here

Explanation:

Which statement correctly describes the melting and boiling points of water?
A) They occur due to electrostatic forces between molecules
B) They are the same temperature.
C) They are 0°F and 100°F, respectively.
D) They both depend on the surface tension of water.​

Answers

The temperature at which a solid transforms into a liquid at atmospheric pressure is referred to as the liquid’s melting point.

What are the melting and boiling points of water?

The fact that water boils at a greater temperature than fluorine makes option C the correct choice. The melting point of water is zero degrees Celsius (32 degrees F). Depending on the atmospheric pressure, different amounts of water will boil at different temperatures. When purified water reaches its boiling point at sea level, it does so at 212 degrees Fahrenheit (100 degrees Celsius).

Compared to fluorine, water has a greater boiling point. Regarding the melting and boiling points of water and fluorine molecules, this statement is accurate.

The temperature at which a substance's solid and liquid phases are in equilibrium is known as its melting point. A temperature at which a substance's vapour pressure reaches its boiling point.

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Statement C; They are 0°F and 100°F, respectively, correctly describes the melting and boiling points of water. But Instead of F it should be degree Celsius.

What is Melting point? The temperature at which a substance changes its state from a solid to a liquid is termed as its melting point. The solid and liquid phases or states are in equilibrium at the melting point. Pressure and temperature affects a substance's melting point, which is typically reported at a standard pressure such 1 atmosphere or 100 kPa.The Melting point of water is 0°C and boiling point is 100°C.

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The interaction of the skeletal and muscular systems to create movement and locomotion is regulated by which organ system?
A. Nervous
B. Respiratory
C. Digestive
D. Immune

Answers

Answer: steaks

Explanation:

Let us assume that Cd(OH)2(s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq) (presented in the transition) would go to completion.

Cd2+(aq)+2NaOH(aq) → Cd(OH)2(s)+2Na+(aq)

If you had a 0.300 L solution containing 0.0220 M of Cd2+(aq) , and you wished to add enough 1.25 M NaOH(aq) to precipitate all of the metal, what is the minimum amount of the NaOH(aq) solution you would need to add? Assume that the NaOH(aq) solution is the only source of OH−(aq) for the precipitation.

Answers

Answer:

The minimum amount of NaOH(aq) solution needed to add is 0.0560 L. This can be calculated by using the following equation:

Moles of Cd2+ = 0.0220 M x 0.300 L = 0.0066 mol

Moles of NaOH = 0.0066 mol x 2 = 0.0132 mol

Volume of NaOH = 0.0132 mol/1.25 M = 0.0560 L

Explanation:

What is the calculated value of the cell potential at 298K for an electrochemical cell with the following reaction, when the Hg2 concentration is 7.36E-4 M and the Al3 concentration is 1.05 M

Answers

Answer:

Explanation:

Concentration of Hg⁺² = 7.36 x 10⁻⁴ M

Concentration of Al⁺³ = 1.05 M

2Al + 3Hg⁺² = 2Al⁺³ + 3Hg .

E = E₀ + RT / nF ln [ Al⁺³]² / [ Hg⁺² ]³

E₀ = reduction potential of  Hg⁺² minus reduction potential of  Al⁺³

= 0.92 V - ( - 1.66 V )

= 2.58 V

E = 2.58  + .059 /n  log  [ Al⁺³]² / [ Hg⁺² ]³

n = 6 , [Al⁺³] = 1.05 M ; [Hg⁺²] = 7.36 x 10⁻⁴ M

E = 2.58  + .059 /6  log  [ 1.05]² / [ 7.36 x 10⁻⁴ ]³

= 2.58  + .059 /6  log  27.65 x 10⁸ .

= 2.58  + .059 /6  [8+ log  27.65 ].

= 2.58  + .059 /6  [8+ log  27.65 ].

= 2.58  + .09

= 2.67 V .

The net ionic equation for formation of an aqueous solution of Al(NO3)3 via mixing solid Al(OH)3 and
aqueous nitric acid is

Answers

Answer:

Al(OH)3 (s) + 3H+ (aq) → 3H2O (l) + Al3+ (aq)

Explanation:

The net ionic equation for the reaction between solid Al(OH)₃ and aqueous nitric acid, HNO₃ is

3H⁺(aq) + Al(OH)₃ (s) —> 3H₂O(l) + Al³⁺(aq)

The reaction between Al(OH)₃ and HNO₃ will proceeds as follow:

HNO₃ (aq) —> H⁺(aq) + NO₃¯(aq)

HNO₃ (aq) + Al(OH)₃ (s) —>

H⁺(aq) + NO₃¯(aq) + Al(OH)₃ (s) —> H₂O(l) + NO₃¯(aq) + Al³⁺(aq)

Cancel the spectator ion (i.e NO₃¯)

H⁺(aq) + Al(OH)₃ (s) —> H₂O(l) + Al³⁺(aq)

Write 3 before H⁺ and H₂O to obtain the balanced ionic equation as shown below:

3H⁺(aq) + Al(OH)₃ (s) —> 3H₂O(l) + Al³⁺(aq)

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What is higher boiling point alkyne or alkyl halides??

Answers

Answer: alkyl halide

Explanation: brianlist please?

Alkyl Halides :) hope it helps

Lisa has a glass that has a mass of exactly 100 grams. She puts exactly 45 grams of acid in the glass, and then she adds 15 grams of crushed limestone. When the limestone touches the acid, it makes bubbles. Lisa waits until the reaction stops, and then she weighs the glass and its contents. What should Lisa expect to find about the mass of the glass and its contents when she puts it on a scale?

Answers

Answer:

She should expect for the scale to say 145 grams.

Explanation:

Limestone is mostly made up of the mineral calcium carbonate (CaCO3). But if you add an acid, you add hydrogen ions (H+), which will react with the carbonate to form hydrogen carbonate HCO3- ions, which are very soluble in water, and the limestone will dissolve. So, if you add 100+45 you get 145.

use the kinetic particle model to describe the motion and separation of the particles in solid carbon dioxide and carbon dioxide gas

Answers

In solid carbon dioxide (dry ice), the particles are held together by strong covalent bonds, so they do not move around much.

What is the carbon dioxide?

Carbon dioxide (CO2) is an odorless, colorless gas created through natural processes such as respiration, combustion and the breakdown of organic materials. As a greenhouse gas, it is a major component of the Earth’s atmosphere and plays a critical role in regulating the global climate. Carbon dioxide is made up of one carbon atom and two oxygen atoms, and is produced when fossil fuels such as coal and oil are burned. Plants and trees also use carbon dioxide as part of their photosynthesis process. Carbon dioxide is essential for life on Earth, however, too much of it can have a negative impact on our planet. As human activity has increased over the past century, so too has our production of CO2, resulting in higher concentrations of this gas in the atmosphere and contributing to global warming.

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What happens when,
a) Hydrogen gas is bubbled into acidified potassium permanganate solution?
b) Some piece of zinc are added into acidified permanganate solution?
c) Hydrogen gas is bubbled into acidified potassium dichromate solution?
d) Some pieces of zinc are added in acidified potassium dichromate solution?
e) Hydrogen gas is bubbled into acidified ferric chloride solution?
f) Some piece of zinc are added into acidified ferric chloride solution?
Add the required chemical reactions as well

Answers

Explanation:

I)reaction between potassium paramagnet with H2 forms MnO2

What is the molarity of the solution formed by mixing 0.2 moles of NaOH with enough water to make 0.15 L of solution?

Answers

Answer: 0.5

Explanation:

[H3O+] = 3.6 x 10-2 M

Answers

Answer:

om pH

The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog (- pH) Example: What is the hydronium ion concentration in a solution that has a pH of 8.34?

Explanation:

Plz help me well mark brainliest if Correct!!...

Answers

Answer:

C

Explanation:

Answer:

C

Explanation:

The specific place where an organism lives is called its habitat.

2 attempts len
Check my work
The density of sucrose, table sugar, is 1.56 g/ec. What volume (in cubic centimeters) does 19.0 g of
sucrose occupy?
cc

Answers

Answer:

12.18 cc

Explanation:

From the question given above, the following data were obtained:

Density = 1.56 g/cc

Mass = 19 g

Volume =?

The density of a substance can be defined as the mass per unit volume of the substance. Mathematically, it can be expressed as:

Density = mass / volume

With the above formula, we can obtain the volume of the sucrose as follow:

Density = 1.56 g/cc

Mass = 19 g

Volume =?

Density = mass / volume

1.56 = 19 / volume

Cross multiply

1.56 × volume = 19

Divide both side by 1.56

Volume = 19 / 1.56

Volume = 12.18 cc

Therefore, the volume occupied by the sucrose is 12.18 cc

what is the difference between refference and indicator electrode​

Answers

Answer:

The key difference between indicator electrode and reference electrode is that indicator electrode responds to changes in the activity of the analyte, whereas reference electrode does not respond to changes, and its response is stable.

Explanation:

3. Silances are more reactive than alkanes. Explain.

Answers

The lower bond energy of the silicanes make them more reactive than the alkanes.

What are the silicanes?

We know that the members of group four has the ability to catenate and this is a property that characterizes all the elements that we can find in the group. However the extent to which the members of the group can be able to catenate is what we use to determine the stability of the bonds.

The alkanes are composed of the bonds that exist between carbon and hydrogen and the alkanes can be able to form very long chains and this can be used to explain the fact that you can be able to find the alkanes in various kinds of applications.

However, the bond energy of the silicanes is less than that of the alkanes hence they tend to be more reactive  then the alkanes.

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Consider the following chemical reaction:

4 Al(s) + 3 O2(g) ⟶2 Al2O3(s)

If 4.2 grams of Al reacts with 3.0 grams of O2,

1. How many grams of Al2O3 could be produced?

2. Which reactant is limiting?

3. Which reactant is excess?

4. How much of the excess reactant would remain?

Answers

Answer:

1. mAl₂O₃ = 6.42 g

2. O₂

3. Al.

4. mAl = 1.67 g

Explanation:

Let's calculate the moles of Al and O2 first before doing any other calculations. The molecular weights of Al and O are 26.98 g/mol and 16 g/mol, so the moles are:

moles = mass / Atomic weight or molar mass

moles Al = 4.2 / 26.98 = 0.156 moles

moles O2 = 3 / (2*16) = 0.094 moles

The molar mass of Al2O3 is:

MM = (2 * 26.98) + (3*16) = 101.96 g/mol

With these data, let's determine each part:

1, 2 and 3. Grams of Al2O3, limiting and excess reactant:

To do this, we need to know which is the limiting reactant. this reactant will tell us how many moles are produced of Al2O3 and then, with the previously calculated molar mass, we can determine its mass. Let's see again the overall reaction taking place:

4Al + 3O₂ ---------> 2Al₂O₃

According to this reaction, 4 moles of Al reacts with 3 moles of oxygen, so:

If:            4 moles Al ---------> 3 moles O₂

Then:      0.156 moles ----------> X

X = 0.156 * 3/4 = 0.117 moles of O₂ required.

However, we do not have 0.117 moles of O₂, we have 0.094 moles, therefore we can conclude that the oxygen is the limiting reactant and Aluminum is the excess reactant.

Now, the moles produced of Al₂O₃ will be:

3 moles O₂ -------> 2 moles Al₂O₃

0.094 moles -------> Y

Y = 0.094 * 2/3 = 0.063 moles of Al₂O₃

Finally the mass would be:

mAl₂O₃ = 0.063 * 101.96

mAl₂O₃ = 6.42 g

4. mass of excess reactant:

The mass of excess reactant would be:

moles Al = 0.156 - 0.094 = 0.062 moles

mAl = 0.062 * 26.98

mAl = 1.67 g

Hope this helps

Antigens are substances that may induce immune response as they are recognised and bound by antibodies or cells of the immune system.
Based on your knowledge of the structures of bacteria and viruses, can you suggest some examples of molecules that are antigenic?

Answers

Some examples of molecules that are antigenic may be proteins and or polysaccharides in the cell wall of pathogenic bacteria which may be targeted by the immune system during the production of antibodies.

What is the relationship between antigens in pathogenic bacteria and antibodies of the immune system?

The relationship between antigens in pathogenic bacteria and antibodies of the immune system is based on the fact that antigens are biomolecules in the pathogens that can be targeted to bond antibodies that are produced by the organism in immune responses against bacteria, viruses, and allergens in the air and foods, etc.

Therefore, with this data, we can see that antigen molecules be any type of biomolecule present in the pathogen and the relationship between antigens in pathogenic bacteria and antibodies of the immune system is based on the binding between them (antigens and antibodies) which is fundamental during certain specific immune responses.

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What type of reaction is shown below c10H8+12O2 10co2+4H2O

Answers

Answer:

Explanation:

Combustion.  Have fun with that.

Calculate the mass percent composition of nitrogen in each nitrogen containing compound

Answers

Mass percent of a compound=(mass of element in molecule/total mass of compound)×100  (a) 63.64%

What is mass percentage composition ?

We use the concept of mass percentage composition to explain the concentration of an element in a compound or a component in a combination. This word refers to the overall percent by mass of each element present in a compound.

In chemistry, a compound's percent composition is calculated by dividing its total amount of each elements by the compound's total amount, multiplied by 100. The following formula determines an element's percentage composition:

(gE/gT) = %CE 100

Here, %CE stands for the element's composition in percent.

How to calculate the percentage of each element by mass makes up each compound?

To get the mass percent of an element in a compound, multiply the result by 100 after dividing the mass of the element in 1 mole of the compound by the compound's molar mass.

Calculating total mass of HNO3

= 1 x 1 + 14 x 1 + 16 x 3

= 1 + 14 + 48

= 63

Calculating the mass percentage of Nitrogen in HNO3

= 1/63 x 100

= 1.586 %

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Pasagot kailangan Asap​

Answers

Answer:mmhm

Explanation:

mhhm

Answer:

do u want the answer now?

structure of potassium trioxalatoaluminate(iii)?​

Answers

Answer:

K3[Al(C2O4)3] is the answer

Other Questions
plz anserw these questions. i will give brainelst 1. What is the sum of the interior angles of a quadrilateral? PLEASE HELP I AM DESPERATE!Question is in the picture please help!!! a certain mass of neon is in a rigid steel container. the samew mass og helium is added, what happens to pressure When shellfish ingest dinoflagellates, a) they turn red. b) they can become poisonous. c) they enter into a symbiotic relationship. According to the Declaration of Independence, the role of government is to:Single choice.(7 Points)Answer choices -Expand the power of the state-Protect the rights of the king-Divide itself into three branches-Protect the natural rights of individuals What trait or characteristic do the following verbs have in their yo forms: poner, tener, venirAthey are all -zco verbsBthey are all yo-go/go-yo verbsCthey are all oy verbsDthey are all g to j verbs 8. Given DF bisects LEDF, find n and then find FG. The diagram is not drawn to scale.2 pointsShow your work to find FGShow your work to find nGIVING 20 POINTS!! A football team consists of 20 each freshmen and sophomores, 15 juniors, and 10 seniors. Four players are selected at random to serve as captains. Find the probability that PLEASE HELP THIS IS URGENT PLEASE!!!!!!!!!!!Why do you think the Ottoman Empire wanted access to the Mediterranean Sea and Black Sea? How do you find the height of an acute triangle? the efficiency of the turbines and generators is 80% calculate the useful output energy transfer from the hydroelectric power station in 1 minuteuse your answer to part (b) When stress on a fault builds high enough for the rocks to snap and move suddenly, an earthquake occurs from the release of ______ Cheyenne Corp. uses the percentage of receivables method for recording bad debts expense. The accounts receivable balance is $170000 and credit sales are $1710000. Management estimates that 5% of accounts receivable will be uncollectible. What adjusting entry will Cheyenne Corp. make if the Allowance for Doubtful Accounts has a credit balance of $3400 before adjustment? Bad Debt Expense 8500 Allowance for Doubtful Accounts 8500 Bad Debt Expense 5100 Accounts Receivable 5100 Bad Debt Expense 5100 Allowance for Doubtful Accounts 5100 Bad Debt Expense 8500 Accounts Receivable 8500 The scatter plot shows the number of strawbernes that have been picked on the farm during the month of February. Part A Using computer software, a correlation coefficient of 0. 01 was calculated Based on the scatter plot, is that an accurate value for this data? Why or why not? (5 points) Part B. Instead of comparing the number of strawberries picked and the day in February, write a scenario that would be a causal relationship for strawberries picked on the farm (5 points) A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 2.00 m and the distance from the fulcrum to the load is 0.500 m. A graph of resistance force vs. effort force is shown. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is the efficiency of the lever? Show your work. Is 12 16 20 a right triangle? Math A 6. 0 kg bowling ball traveling at 2 m/s strikes a 1. 5 kg bowling pin. Describe and compare the forces that act on the bowling ball and the bowling pin during the collision. Have you ever ____been_____ to Paris?33You __dont need to_____ shout. I can hear you clearly.14Are we nearly there _or ot_____?34In 2030, they will ____have____ been married for 25 years.1510cm is _______bigger___ than 5cm.35_____we were dancing on_____ the rain, we enjoyed ourselves in the park.16I have lived here ______since__ 1987.36According to etiquette, one ____fork____ to use ones cutlery.17This coffee is ____served_____ hot to drink.37By the time we arrived, Paul _had______ already left the party.18In England, June 21st is the __longest________ day of the year.38The park was almost empty. ______bearly__ anyone was there.19What are you _______doing___ next Saturday?39______if____ it not for the zookeepers, the lions would have died from infection.20Its cold today. Would you like _____a__cup__ tea?40________ it not been for the alarm, we would not have known there was a problem. What are the top 4 lifestyle factors that contribute to the leading causes of death?