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Evgen [1.6K]
3 years ago
15

Answer for number 4

Chemistry
2 answers:
vaieri [72.5K]3 years ago
4 0

Answer:

Pretty sure it is Information transfer.

Explanation:

erma4kov [3.2K]3 years ago
4 0
C l think it's c hope it's right
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One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?
gizmo_the_mogwai [7]
27*9=243 if one mole is equal to 27 grams times that by 9
6 0
3 years ago
Does adding coefficients to a chemical equation disobey the law of definite proportions? Explain your answer.
Temka [501]

Answer:   No

Explanation:

- Law of definite proportions is a case from the Law of conservation of energy (matter) which states that "mass can neither be created nor destroyed, but changed from one form to another."

-  Adding coefficients to a chemical equation confirms that there is the same number of atoms on both sides of a reaction; therefore, matter has not been created or destroyed but reorganized to give new substrates.

Example :             2 Mg + O2 → 2 MgO              

In the balanced equation above, 2 moles of Mg reacts with 1 mole of O2 to produce 2 moles of MgO.

mass of 2 moles of Mg  = 24×2= 48 grams

mass of 1 mole of O2 = 16+16 = 32 grams

total mass of reactants = 48 + 32 = 80 grams


mass of 2 moles of MgO = (24+16) ×2 = 80 grams  

total mass of products = 80 grams

It is clear that the number of grams of matter before and after the reaction is the same and  equals to 80 grams, so obeys the law of definite proportions..


3 0
3 years ago
An ideal monatomic gas at 300 K expands adiabatically to twice its initial volume. Assume that the process is also quasistatic.
kondor19780726 [428]

Answer:

600k

Explanation:

In this problem, we need to use a gas law that relates temperature to volume. The gas law to use here is the Charles’ law.

The Charles’ law posits that temperature and volume are directly proportional, provided that the pressure is kept constant.

Mathematically:

V1/T1 = V2/T2

We are looking at getting V2, hence we can write the mathematical equation as:

T2 = V2T1/V1

Asides the fact that we know that the gas is monoatomic, we do not know its volume. Let its initial volume be v. Since it expanded adiabatically, this means that its new volume is 2v

Hence: V1 = v , V2 = 2v , T1 = 300k and T2 is ?

Substituting these values, we have the following:

T2 = (2v * 300)/v

T2 = 600k

6 0
4 years ago
A bitter liquid ,ph= is classified as
choli [55]
It is a basic liquid. 

Hope it helped!
8 0
3 years ago
Calculate empirical formula 24.5 g nitrogen 70 g oxygen
LenKa [72]
24.5 / 14 = 1.75
70 / 16 = 4.375


4.375 / 1.75 = 2.5

empirical formula = N2O5
3 0
4 years ago
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