Convert all the gases from grams to moles using their molar masses first. Remember that nitrogen and oxygen exist as DIATOMIC gases.
O2 - 25 g / 32 g/mol = 0.78 mol O2
N2 - 15 g / 28.02 g/mol = 0.54 mol N2
He - 10 g / 4.0 g/mol = 2.5 mol He
Add all the moles of gases.
0.78 + 0.54 + 2.5 = 3.82 moles
Divide O2 moles by total moles.
0.78/3.82 = 0.20
Answer:
Explanation:
Exothermic Reactions
Exothermic Reactions
This means that the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products. Excess energy from the reaction is released as heat and light. Figure: Chemical reaction: A Hermite reaction, which produces molten iron.
Answer:
Brainly operates a group of social learning networks for students and educators. Brainly inspires students to share and explore knowledge in a collaborative community and engage in peer-to-peer educational assistance, which is made available on www.brainly.com and any www.brainly.com sub-domains (the “Website”) as well as the Brainly.com mobile application (the “App”) (the “Website” and the “App” are collectively the “Brainly Services”).
Explanation:
Answer:
A) 0.50 M
Explanation:
The computation of the number of molarity of the NaOH is given below:
As we know that
Molarity = Moles ÷ liters
where
Moles is 20
And, the liters is 40
So, the molarity is
= 20 ÷ 40
= 0.50 M
hence, the molarity of the NaOH solution is 0.50 M
Therefore the A option is correct
