Which piece of glassware is cone shaped (rest of question on image)

The equations for the preparation of C₂H₅Br from alcohol using PX₃ and HX are shown in the attachment below.

a) Preparation of C₂H₅Br from alcohol using PX₃

In PX₃, X refers to the halides (F, Cl, Br etc.). Since the desired ethyl halide is ethyl bromide (C₂H₅Br) , then X in PX₃ will be Br. Therefore, PBr₃ will be used in the reaction as shown in the attachment below.

b) Preparation of C₂H₅Br from alcohol using HX

Also, In HX, X refers to the halides (F, Cl, Br etc.). Since the desired ethyl halide is ethyl bromide (C₂H₅Br), then X in HX will be Br. Therefore, HBr will be used in the reaction as shown in the attachment below.

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Answer:

Not all mixtures are solutions. A solution is a specific term that describes an even or homogeneous mixture of a solute, the substance being mixed, in a solvent, the substance that is in a greater amount in which the solute dissolves. All solutions are mixtures because it is two or more substances mixed together.

Answer:

60.06 g/mol

The solute is urea, CO(NH2)2. Molar mass of urea: (12.01) + 16.00 + 2(14.01 + 2(1.008)) = 60.06 g/mol.

Explanation:

Answer:

60.06 g/mol

Explanation:

the solution area,CO(NH2)2.molar mass urea:

(12.01)+16.00+2(14.01+2(1.008))=60.06g/mol

Answer:

9 days

No explanation needed.

Answer:

Variable data is defined as information and figures used to build control charts. Variable data can be used to create average (X-bar) charts, range charts, and sample standard deviation charts or "S-charts."

Note down the formula below

[tex]\boxed{\sf Mass\%\;of\; element=\dfrac{Mass\:of\:the\: element}{Mass\;of\:the\: compound}\times 100}[/tex]

Mass of the compound

[tex]\\ \sf\longmapsto 32+2=34g[/tex]

Mass % of Hydrogen:-

[tex]\\ \sf\longmapsto \dfrac{2}{34}\times 100[/tex]

[tex]\\ \sf\longmapsto \dfrac{1}{17}\times 100[/tex]

[tex]\\ \sf\longmapsto 5.8\%[/tex]

Mass % of Oxygen:-

[tex]\\ \sf\longmapsto \dfrac{32}{34}\times 100[/tex]

[tex]\\ \sf\longmapsto \dfrac{16}{17}\times 100[/tex]

[tex]\\ \sf\longmapsto 94.2\%[/tex]

Answer:  No, the samples are not of equal masses.

Explanation:  Mass is volume X density

A:  (2ml)*(18.4g/ml) = 36.8 g

B:  (5ml(*(35.5g/ml) = 177.5 g

Answer:

Lanthanum and Lutetium

I hope this will help you

Answer:

The highly unstable pure sodium or potassium wants to lose an electron, and this splits the water atom, producing a negatively charged hydroxide ion and hydrogen and forming an explosive gas that ignites.

Explanation:

Answer:

2

Explanation:

Explanation:

Actually, the diagram showned in the picture gave you some hints.

Moving every one block to the left indicates 10 times the value of the symbol than the previous one.

For instance,

[tex]1\text{ km}=10^1\text{ hm}=10^2\text{ dam}=10^3\text{ m}[/tex]

Take the first question as example, since "k" is 9 blocks from the left of mu (u),

[tex]1 \text{ kg}=10^9 \text{ }\mu\text{g}[/tex]

[tex]\text{So }.000078\text{ kg}=.000078\times10^9 \text{ }\mu\text{g}=7.8\times10^{-5}\times10^9 \text{ }\mu\text{g}=7.8\times 10^4\text{ }\mu\text{g}[/tex]

Similarly,

[tex]1 \text{ cL}=10^{-2} \text{ L}[/tex]

[tex]\text{So }34800\text{ cL}=34800\times10^{-2} \text{ L}=3.4800\times10^{4}\times10^{-2} \text{ L}=3.48\times 10^2\text{ L}[/tex]

[tex]1 \text{ Mm}=10^{3} \text{ km}[/tex]

[tex]\text{So }.0283\text{ Mm}=.0283\times10^{3} \text{ km}=2.83\times10^{-2}\times10^{3} \text{ km}=2.83\times 10^1\text{ km}[/tex]

Answer:

up with you and the other day and I don't think I can get a chance

Answer:

I think its A And C OR D HOPE ITS RIGHT

Explanation: BY THE LOVE YOUR AVTAR

True statements are:

Density increases if the volume of an object decreases and the mass remains the same.

Density increases if the mass of an object increases and the volume remains the same.

Density remains the the same if the mass and volume of an object increases proportional.

Further:

Density = Mass/Volume

Answer:

Z was smaller than X

Explanation:

if X<Y and Y<Z

therefore X<Z

Answer:

V= π ×r² × h

V = 3.14 × (0.9)² × 4

V = 3.14 × 0.81 × 4

V = 10.1736

Mass = Volume × density

M = 10.1736 × 2.6

M = 26.45136 g

Answer:  1 cm = 100m

Explanation:  Centi- is the prefix used to designate 0.01 (one hundredth) of something.  1 cm means 0.01 m.

1 cm = 100 m  is NOT a correct conversion factor. Option C is correct.

The conversion factors are the factors that re-use to convert some values from unit to unit of another value like from centimeter to meter from meter to kilometer from milligram to gram.

In one centimeter it is the suffix used to denote it is the one by hundred value of the on meter or which is equal t one meter so, 1cm = 0.01 meters as it is the 1/100 part f the one-meter distance.

Therefore, Option C is correct. 1 cm = 100 m  is NOT a correct conversion factor.

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Answer:

Advantages :they are used for seeing chemical reactions .

they are used for doing chemical experiment .

they are used for making affective medicines .

Disadvantages :they harms to our environment.

they can make side effects in our body by affective medicines made by chemicals.

while doing different unknown experiments they make explosions which can also harm to us.

Explanation:

just trying....hope that helps

1.6 grams of oxygen will react with 2.4 grams of magnesium.

Explanation:

Given:

2.4 grams of magnesium.

The reaction between magnesium and oxygen:

[tex]2Mg+O_2\rightarrow 2MgO[/tex]

To find:

The mass of oxygen required to react with 2.4 grams of magnesium.

Solution:

The mass of magnesium = 2.4 g

Moles of magnesium =[tex]\frac{2.4 g}{24.305 g/mol}=0.0987 mol[/tex]

[tex]2Mg+O_2\rightarrow 2MgO[/tex]

According to the reaction, 2 moles of magnesium reacts with 1 mole of oxygen, then 0.0987 moles of magnesium will react with:

[tex]=\frac{1}{2}\times 0.0987 mol=0.04935\text{mol }O_2[/tex]

Moles of oxygen required = 0.04935 mol

The mass of 0.04935 moles of oxygen :

[tex]=0.04935\times 31.999 g/mol=1.579 g\approx 1.6 g[/tex]

1.6 grams of oxygen will react with 2.4 grams of magnesium.

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Answer:

Few Examples of Kinetic Energy

The following are typical examples of kinetic energy:

A wrecking ball used to demolish a building through utilization of the kinetic energy it possesses in motion.

Conversion of liquid water to steam, by virtue of the fast movement of the molecules of the liquid upon agitation

A golf ball after being struck off the tee

An asteroid falling towards Earth at incredible speed

A downhill skier traveling down a hill

The flow of a river

An airplane in motion (possesses a tremendous amount of kinetic energy. This is because the mass of the airplane and the velocity at which it moves are enormous)

Explanation:

Answer:

"The battery in the car has potential energy in the form of chemical energy. As the car is turned on and moves, this potential energy becomes kinetic energy."

Explanation:

Remember to change it up a bit.

Explanation:

Fuels such as natural gas and petrol contain hydrocarbons. These are compounds of hydrogen and carbon only. When they burn completely: the carbon oxidises to carbon dioxide

Explanation:

Add ethanol ( or whichever you choose) into the mixture.

Use a filter to separate the salt from mix.

Evaporate the ethanol/petroleum spirit -sugar mix to get the sugar by itself.

Done!

Answer:  1)  a) Use a magnet, or b) add to water abd scoop off the floating plastic beads

2)  Grind the leaf and solubilize what you can in water, then use filter paper as a chromatograph to separate the colors.

Explanation:

1)  Look for any property between the two substances that has a large enough difference to provide an avenue for separation.  Density is good, particle size also can be used, solubility, and magnetic properties, among others.

2)  https://www.britannica.com/science/paper-chromatography

Answer:

C is the correct answer.

Explanation:

Agar provides a solid growth surface for the bacteria, upon which bacteria reproduce until the distinctive lumps of cells.

The agar medium is used in Petri dishes because it helps microorganisms grow. option C is correct.

A microorganism is a microscopic body that cannot be seen with the normal human eyes on anything it can be a virus or bacteria or both. Viruses are disease-causing mostly but there are some good bacteria too.

The use of agar medium is the source of food for the microorganism as all the micronutrients and macronutrients with essential amino acids are present into it.

Therefore, option C is the correct agar medium used in Petri dishes because it helps microorganisms grow.

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Number of men required to stand on top of each other to reach moon from earth are :

[tex] \boxed{ \boxed{ \: \: \: \: \: \: \: 210320000 \: \: \: \: \: \: \: }}[/tex]

Answer:

Reaction??

Explanation:

Answer:

Explanation: Rinsing hands in lemon juice would make them less slick because when a acid (soap) and a alkaline (lemon juice) reacts it becomes neutral

Answer:

3

Explanation: