If you find that a substance turns litmus paper to blue and contains hydrogen ions it is most likely what
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The ratio of H2 gas to O2 gas will always remain 2:1, and the ratio of H2 gas to H2O gas will remain 1:1 so if the gas volumes are measured at the same temperature and pressure: 44.8 liters of H2 + _____ liters of O2 → ____ liters of H2O
What is the IUPAC name for the compound FeS?(1) iron(II) sulfate (3) iron(II) sulfide (2) iron(III) sulfate (4) iron(III) sulfide
Upon combustion, a 1.3109 g sample of a compound containing only carbon, hydrogen, and oxygen produces 3.2007 g and 1.3102 g. Find the empirical formula of the compound.The answer I got was , but I'm not sure if I did it right or not. Can someone confirm this for me?
Explain how methane (ch4) and ethane (c2h6) demonstrate the law of definite composition and the law of multiple proportions
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Answer:
19.1 mol H2
Explanation:
1. Hello, first you have to propose the chemical equation:
H2 + CO2 = H2O + CO
The equation has to be balanced, it means that the same quantity of atoms must be in the right and left side of the equation.
2. To do the stochiometric calculus, you need to find which one is the limiting reactant, in the problem says that you are working with an excess of carbon dioxide, so the limiting reactant is hydrogen H2:
Limiting reactant: H2
Excessing reactant : CO2
3. With the limiting reactant and the chemical equation, you have to establish the stichometrical relation to calculate the quantity of all reactants and products:
In a base of the chemical equation, and using the limiting reactant:
1 mol H2 = 1 mol H2O
The exercise says that you have 19.1mol of water vapor (H2O(g)), then to calculate the mol of H2 you need, you make the calculus as follow:
19.1 mol H2O ×( 1mol H2/1 mol H2O)= 19.1 mol H2
The exercise completed is in the document attached.
4H2 + CO2 = 2H2O + CH4
so 4 moles H2 : 2 moles H2O = x : 19.1
you ll need x = 2x19.1 / 4
and that is 9.55 moles of hydrogen gas
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Answer:
False
Explanation:
Activation energy is the minimum amount of energy required for a reaction to proceed. Hence, for a reaction (endothermic and exothermic) to occur/proceed, the activation energy must be met. This is because, a reaction is only endothermic or exothermic when the reaction has started/occurred. If the activation energy is not produced, there will be no reaction in the first place.
NOTE: Exothermic reaction is a reaction that involves the release of energy (heat or light) into the surroundings. While endothermic reaction is a reaction that requires the input of energy or it absorbs energy from the environment.
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Bromine (Br) has an atomic number of 35, which means it normally has 35 electrons. However, since the bromide ion (Br-) has a negative charge, it has gained one extra electron, bringing the total number of electrons to 35 + 1 = 36.
So, the correct answer is not listed among the options given
B. 3.636 kPa
C. 854.46 kPa
D. 510 kPa
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Answer : (C) 854.46 KPa.
Solution : Given,
Initial pressure = 400 KPa
Initial temperature = 110 K
Final temperature = 235 K
According to the Gay-Lussac's law, the absolute pressure is directly proportional to the absolute temperature at constant volume of an ideal gas.
P ∝ T
Formula used :
where,
= initial pressure
= final pressure
= initial temperature
= final temperature
Now put all the values in above formula, we get
By rearranging the terms, we get the value of new/final pressure.
= 854.5454 KPa
854.55 KPa
C. 854.46 kPa
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hope this helps!