Consider the chemical reaction
aC2H6 + bCO2 + cH2O → dC2H5OH,
where a, b, c, and d are unknown positive integers. The reaction mush be balanced; that is, the number of atoms of each element must be the same before and after the reaction. For example, because the number of oxygen atoms must remain the same,
2b+c=d.
While there are many possible choices for a, b, c, and d that balance the reaction, it is customary to use the smallest possible integers. Balance this reaction.
a=
b=
c=
d=

Answer:

If Earth were to change its orbit – maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull – it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun.

Explanation:

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Explanation:

If Earth were to change its orbit – maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull – it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun.

Answer:

5

Explanation:

Answer:

no it will take more time to boil

Answer: The mass of sodium bromide dihydrate is 0.208 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]

where,

n = moles of solute

[tex]V_s[/tex] = volume of solution in ml  = 250 ml

moles of [tex]NaBr.2H_2O[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{138.92g/mol}[/tex]

Now put all the given values in the formula of molality, we get

[tex]0.00600=\frac{x\times 1000}{138.92\times 250}[/tex]

[tex]x=0.208[/tex]

Therefore, the mass of sodium bromide dihydrate is 0.208 grams

Answer:

904.014 j/kgk

Explanation:

Mass of metal = 45g

Temperature of metal = 85.6°

Mass of water = 150

Temperature of water = 24.6

Final temperature of system = 28.3

Heat lost by metal = Heat gained by water

m1 * c1 * dt = m2 * c2 * dt

Q = quantity of heat

Q = m*c*dt

dt = change in temperature

dt of water = 28.3 - 24.6 = 3.7

dt of metal = 85.6 - 28.3 = 57.3

Specific heat capacity of water, c = 4200

(45 * 10^-3) * c * 57.3 = (150 * 10^-3) * 4200 * 3.7

2.5785c1 = 2331

c1 = 2331 / 2.5785

= 904.01396

= 904.014 j/kgk

the second option is best described

Explanation:

.

Reactions in our natural world range from classical chemical reactions to nuclear reactions.

A classical chemical reaction is a natural process that occur when one or more elements called reactants change to form one or more products.

Chemical reactions can be speed up by the action of enzymes, which are biological catalysts capable of lowering the activation energy of the reactions.

On the other hand, nuclear reactions occur when atoms react among them to generate new elements.

Nuclear reactions can be classified into fusion reactions where atomic nuclei fuse and fusion reactions where an atomic nucleus gives rise to two different atoms.

In conclusion, Reactions in our natural world range from classical chemical reactions to nuclear reactions.

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Explanation:

im bumb like really bumb

Answer:

Hi I ll explain

Explanation:

[tex]0.4mol \times \frac{22.4liter}{1mol} = 8.96liter[/tex]

Remember

At STP always one mole of every gas equals 22.4 liter

Answer:

3.41 g

Explanation:

A chemist adds 260.0 mL of a 0.0832 M potassium permanganate solution to a reaction flask. Calculate the mass in grams of potassium permanganate the chemist has added to the flask.

Step 1: Given data

Step 2: Calculate the moles (n) of potassium permanganate added

We will use the following expression.

n = C × V

n = 0.0832 mol/L × 0.2600 L = 0.0216 mol

Step 3: Calculate the mass corresponding to 0.0216 moles of potassium permanganate

The molar mass of potassium permanganate is 158.03 g/mol.

0.0216 mol × 158.03 g/mol = 3.41 g

Answer:

Aldonic acids

Explanation:

Aldonic acids are a group of sugar acids which are derived from the oxidation of the aldehyde group (-CHO) of an aldose to a carboxylic acid group (-COOH).

The aldehyde group of monosaccharides is easily oxidized to the carboxylic acid group by relatively mild oxidizing agents such as copper (ii) ions and the products are called aldonic acids. This oxidation of monosaccharides such as glucose and other reducing sugars is the basis for the test for reducing sugars using the Fehling's reagent, whereby blue copper (ii) ions in solution are reduced to red copper (i) oxide which precipitate out of solution. The most common oxidizing agent used in preparation of aldonic acids is bromine. For example, oxidation of D-glucose by bromine water at C1 yields D-gluconic acid.

Aldonic acids do not usually exist in hemiacetal ring forms but are generally found in their lactone form which are cyclic structures formed by an ester linkage between the carboxylic group and one of the hydroxyl groups of the same molecule.

Answer:

2Mg + O2 -> 2MgO

Explanation:

According to the above reaction ,

28.6g(2mole) Mg combine with 32g (1mole) of O2 to give 80.6g (2 mole) of MgO.

thus,

30g Mg will combine with 20g of O2 to produce 50g MgO and 10gO2 will remain unreactive.

I hope it's helpful!

Answer:

Convection. Happens when air surrounding the heater is heated

Answer:a multiplication

Explanation:

In a dilation, multiplication is the mathematical operation which is used with the scale factor. Thus, the correct option is A.

Dilation is a process of changing the size or the shape of an object by decreasing or increasing its dimensions by some scaling factors.

In mathematics, dilation is a function (f) from a metric space (M) into itself which satisfies the identity (d=rd) for all points x, y \in M, where d is the distance from the points x to y and r is some positive real number. In this, the mathematical operation which is used is multiplication.

Therefore, the correct option is A.

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Answer:

4.50 L

Explanation:

First we calculate how many moles are there in 3.84 L of a 8.50 mol/L solution:

Now, keeping in mind that

we can calculate the volume of a 7.25 mol/L solution that would contain 32.64 moles:

So we could take 4.50 L of the 7.25 mol/L solution and evaporate the solvent until only 3.84 L remain.

Answer: Lava lamps, Earth's mantle, and the Earth's atmosphere.

Explanation: Convection occurs when denser elements sink while less dense elements rise due to difference in density caused by heat.

The wax in lava lamps rises when heated up since their density decreases. The same is for the Earth's mantle, where hotter materials rise, while the cooler ones sink.

Answer:

for one mole of C2H6 there are 7/2 mole of O2 required. so for4. 50 moles you require 4.50 x 7/2 = 15.75 moles of O2.

Explanation:

i hope it's helpful

Answer:

DJSZJDSFRBGUEJD HVCX

Explanation:

Answer:

C. 8

Explanation:

The second shell can hold a maximum of eight electrons. When this is filled, electrons go into the third shell, which also holds a maximum of eight electrons. Then the fourth shell begins to fill. A lithium atom, for example, has three electrons.

Answer:

Yes You use the nuclear transfuser to do that

Explanation:

Answer:

tessoract? also why did you stael my name?

Explanation:

Answer:

Argument: It is not Safe

Further support to the argument is given below.

Explanation:

Solution:

Argument: It is not Safe

First of all, we all know the ideal gas law:

PV = nRT

And the Boyle's Law states that , if the pressure is increased then, volume will decrease. and if the volume is increased then pressure will decrease.

V is inversely proportional to Pressure of the gas.

So, in this case, Let's suppose we have toxic solution of methyl alcohol in the bottle which is tightly closed. It means pressure in the bottle is high, hence the volume is less.

If in this scenario someone, leave the bottle open in the laboratory and as it is given that the level of solution will drastically decrease. It means it is volatile in nature and is converted into gaseous form and we know now that the open bottle has now less pressure. Hence the volume of the gas will be higher and now it can spread to every corner of the laboratory. And it is very dangerous.

Answer:

The new reading of the water level is 54.81 mL.

Explanation:

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

Mass of object = 26.7 g

Density of object = 0.767 g/mL

Volume of water = 20 mL

New reading of the water level =?

Next, we shall determine the volume of the object. This can be obtained as follow:

Mass of object = 26.7 g

Density of object = 0.767 g/mL

Volume of object =?

Density = mass /volume

0.767 = 26.7 / volume of object

Cross multiply

0.767 × Volume of object = 26.7

Divide both side by 0.767

Volume of object = 26.7 / 0.767

Volume of object = 34.81 mL

Finally, we shall determine the new reading of the water level. This can be obtained as follow:

Volume of water = 20 mL

Volume of object = 34.81 mL

New reading of the water level =?

New reading of the water level = (Volume of water) + (Volume of object)

New reading = 20 + 34.81

New reading of the water level = 54.81 mL

Answer:

sanitary landfill

Explanation:

Answer:

Mass = 51 g

Explanation:

Given data:

Mass of nitrogen = 41.93 g

Mass of ammonia formed = ?

Solution:

Chemical equation:

N₂ + 3H₂      →       2NH₃

Number of moles of nitrogen:

Number of moles = mass/molar mass

Number of moles = 41.93 g/ 28 g/mol

Number of moles = 1.5 mol

now we will compare the moles of nitrogen and ammonia.

                N₂          :           NH₃

                  1          :           2

                1.5         :         2/1×1.5 = 3 mol

Mass of ammonia formed:

Mass = number of moles × molar mass

Mass = 3 mol × 17 g/mol

Mass = 51 g

Answer:

Pb

Explanation:

Answer:

Pb is the answer You're looking for

Answer:

10 electrons.

Explanation:

Hello!

In this case, since a normal atom of magnesium has 12 protons and electrons when is not in the form of a cation, since it is a metal that tends to lose electrons when ionized, and therefore it becomes positively charged, we infer  that in form of:

[tex]Mg^{2+}[/tex]

It only has 10 electrons.

Best regards!

The cells in both plants are animals are connected together and communicate through some specified structures. In plants cells are connected by a tubular structure called plasmodesmata.

Cells are the basic units of every lives. A cell contains a nucleus which is the center of a cell and regulates the overall functions of the cell.  The cytoplasm of cells are connected for communication by some structure which are different for plants and animals.

In the case of plants, the cells junction or the structure which connects adjacent cell is called plasmodesmata which links the endoplasmic reticulum, cytoplasm and plasma membranes of the plant cells.

Through these microscopic channels transport of smaller ions and signals are passed to adjacent cells. A typical plant cell might have about 100000 plasmodesmata connecting the cells.

Plasmodesmata appears to be continuous extension of the cell membrane. Hence,  the structures that allow communication between plant cells is Plasmodesmata.

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Answer:

B.

Explanation:

Weather changes daily and varies in different areas around the world