Why can't we change the subscripts in balancing chemical equations?

Answers

Answer 1

Answer: Because the subscripts are what identify the compound. Changing the coefficient is okay, since you are only changing the number of whole compounds. If you change the subscript, however, you will change the compound into a completely different one. Hope that helps!!

Related Questions

Which of the following creates a voltage difference?A. Battery B. Amperes C. Charge D. Resistance
A sample of ethanol has a volume of 7.5 mL and a mass of 5.85 g. A sample of benzene also has a volume of 7.5 ml,but has a mass of 6.60 g. Which liquid is denser
Compared to the atoms of nonmetals in period 3, the atoms of metals in period 3 have1. fewer valence electrons 2. more valence electrons 3. fewer electron shells4. more electron shells
What are 3 toxicants associated with sewage?
How many moles of copper are formed when 3.8 moles of zinc are mixed with copper (II) sulfate?

A gas of 190 mL at a pressure of 74 atm can be expected to change its pressure when its volume changes to 30.0 mL. Express its new pressure in units of atmospheres.

Answers

Answer : The new pressure of the gas will be, 468.66 atm

Explanation :

Boyle's Law : This law states that pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto (1)/(V)$ (At constant temperature and number of moles)

or,

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure of the gas = 74 atm

$P_2$ = final pressure of the gas = ?

$V_1$ = initial volume of the gas = 190 ml

$V_2$ = final volume of the gas = 30 ml

Now we put all the given values in the above formula, we get the final or new pressure of the gas.

$74atm* 190ml=P_2* 30ml$

$P_2=468.66atm$

Therefore, the new pressure of the gas will be, 468.66 atm

Answer: The new pressure of the gas is 467 atm.

Explanation:

To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is inversely proportional to the volume of the gas at constant temperature.

The equation given by this law is:

$P_1V_1=P_2V_2$

where,

$P_1\text{ and }V_1$ are initial pressure and volume.

$P_2\text{ and }V_2$ are final pressure and volume.

We are given:

$P_1=74atm\nV_1=190mL\nP_2=?atm\nV_2=30.0mL$

Putting values in above equation, we get:

$74atm* 190mL=P_2* 30.0mL\n\nP_2=(74* 190)/(30.0)=467atm$

Hence, the new pressure of the gas is 467 atm.

Ionization refers to the process ofa. changing from one period to another.
c. turning lithium into fluorine.
b. losing or gaining protons.
d. losing or gaining electrons.

Answers

The ionizationor ionization energy is the process wherein the energy necessary to remove anelectron from the neutral atom. When located in the periodic table, itincreases across the row and decreases going down. The ionization energy isgreatest for the noble gases. For example, the ionization energy for fluorineis 1681.6 kJ/mol. It means that it takes1681.6 kJ/mol of fluorine to completely remove an electron or ionize it. The answeris d. losing or gaining electrons.

it refers to the process of losing and gaining of electrons

If you mix chlorine lithium and nickel together which two elements would be the most reactive?

Answers

he reactivity of an element increases towards the top and right of the periodic table (until the column of noble gases is reached). Chlorine's outer shell contains 7 electrons that make it very reactive. Helium is a noble gas and is non reactive. Elements found in the middle of the table, like nickel and iron, are reactive, but less reactive than chlorine

Answer:

Helium will be inert. Lithium is the most reactive element, followed by chlorine.

Explanation:

The elements tend to resemble the closest noble gases in terms of their electronic configuration of the last layer, that is, having eight electrons in the last layer to be stable. Then, the reactivity of an element measures the tendency to combine with others to generate the mentioned stability.

Within a period, the groups located on the left of the periodic table are more reactive than groups on the right. This is because it is easier to lose the electron of the last layer possessed by the elements located on the left than more than one electron in the rest of the elements. When we reach a certain group the trend is reversed since it will be easier to gain the missing electrons to resemble the nearest noble gas. Therefore, in a period the reactivity of metals increases the further to the left in the period (less electrons to remove). The reactivity of nonmetals increases as the period progresses since it is the case in which it is easier to acquire electrons to acquire stability, and increases to advance in a period since the less electrons they need to acquire, the more reactants they are.

Within a group, as we descend into it, the electrons of the last layer are farther from the nucleus and, therefore, it will be easier to remove them. In the case of nonmetals, it will be more difficult to take electrons. Then the reactivity of the metals increases when advancing in a group (greater tendency to lose electrons) and the reactivity of the nonmetals increases the higher in the group (greater tendency to take electrons).

Finally, you have noble or inert gases. Its inert name is due to the lack of reactivity with other elements. This is due to its electronic configuration, because its outermost layer or valence layer is always complete, without the need to share, transfer or receive electrons forming bonds. That is, its outer layer is so stable that the element tends not to react with others except in very specific cases.

Taking into account everything mentioned above, it is possible to say that helium is a noble gas, so it will be inert. Lithium is the most reactive element, followed by chlorine.

In a solution made by dissolving 50 grams of calcium chloride in 1000 grams of water, which component is considered to be the solute?

Answers

Calcium chloride is the solute because it was dissolved in water.
Therefore water is the solvent.

Solute is a particle which gets dissolved in a solution. It is usually smaller than solvent in quantity.

Solvent is a particle which dissolves Solute in a solution. It is usually larger than solute in quantity.

In your case above, Calcium chloride is in less quantity, and thus, Calcium chloride shall be called solute.

Gabriella weighs 450 N. She climbs a flight of stairs to a height of 3 m. It takes her 5 seconds. How much work does Gabriella do when she climbs the stairs?A.
150 J

B.
270 J

C.
1350 J

D.
2250 J

Answers

The formula that can be applied in this problem is W = Fd where W is work, F is the force and d is distance. You have 450N and 3m, all you have to do is to multiply it.

W = Fd

W = (450N) (3m)

W = 1350J

The answer is letter C.

A gas occupying a volume of 381 mL at a pressure of 5 mmHg is allowed to expand until the pressure reaches 589 mmHg. What is the final volume in mL?

Answers

The final volume of the gas is approximately 3.24 mL when the pressure has increased from 5 mmHg to 589 mmHg.

To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas. The formula for the combined gas law is:
P1V1/T1 = P2V2/T2
where P1, V1, and T1 are the initial pressure, volume, and temperature of the gas, and P2, V2, and T2 are the final pressure, volume, and temperature of the gas.
In this problem, we are given the initial volume (V1 = 381 mL) and pressure (P1 = 5 mmHg), and we want to find the final volume (V2) when the pressure has increased to 589 mmHg. We can assume that the temperature remains constant.
We can start by rearranging the combined gas law to solve for V2:
V2 = (P1V1/T1) x (T2/P2)
Since the temperature is constant, we can simplify the formula to:
V2 = (P1V1)/P2
Plugging in the values we know, we get:
V2 = (5 mmHg x 381 mL)/589 mmHg
Simplifying, we get:
V2 = 3.24 mL

For such more questions on pressure

brainly.com/question/24719118

#SPJ11

Other Questions

An element has 8 protons and 8 neutrons in its nucleus and 8 electrons revolving around the nucleus. What is the atomic number and atomic mass of this element? The atomic number is 16 and the atomic mass is 8. The atomic number is 8 and the atomic mass is 8. The atomic number is 8 and the atomic mass is 16. The atomic number is 16 and the atomic mass is 4. The atomic number is 4 and the atomic mass is 16.

One group of scientists has proposed a new theory on Adaptation. A majority of scientists worldwide agree with the theory. The theory is most likelyA.biased. B.incomplete. C.accurate. D.unchangeable.

Given the formula representing a compound: what is a chemical name of this compound? 2-pentene 2-pentyne 3-pentene 3-pentyne

3.490x 10^-3 + 1.100x10^-2[?]x10^[?]