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3 years ago

If only 15 moles oxygen are available, how many moles of methane will burn?

Chemistry

1 answer:

nlexa [21]3 years ago

5 0

Answer: 15mol O2 x 1mol CH4 / 2mol O2 = 7.5 mol CH4

Answer: 7.5 mol

Explanation:

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A certain weak acid, ha, has a ka value of 3.6×10−7. part a calculate the percent ionization of ha in a 0.10 m solution. express

slega [8]

Answer is: <span>the percent ionization is 0,19%.
</span>Chemical reaction: HA(aq) ⇄ H⁺(aq) + A⁻(aq).
Ka(HA) = 3,6·10⁻⁷.
c(HA) = 0,1 M.
[H⁺] = [A⁻] = x; equilibrium concentration.
[HA] = 0,1 M - x.
Ka = [H⁺] · [A⁻] / [HA].
0,00000036 = x² / 0,1 M - x.
Solve quadratic equation: x = 0,00019 M.
α = 0,00019 M ÷ 0,1 M · 100% = 0,19%.

8 0

3 years ago

Which equation represents a neutralization reaction? A. 4Fe(s) + 3O2(g) → 2Fe2O3(s) B. 2H2(g) + O2(g) → 2H2O() C. HNO3(aq) + KOH

devlian [24]

Answer : The correct option is, (C)

Explanation :

A. $4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)$

This is synthesis reaction in which the two or more reactant react to give a single product.

B. $2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$

This is combination reaction in which the two reactants combine to form a single product.

C. $HNO_3(aq)+KOH(aq)\rightarrow KNO_3(aq)+H_2O(l)$

This is a neutralization reaction in which an acid react with a base to give a salt and water as a product.

D. $AgNO_3(aq)+KCl(aq)\rightarrow KNO_3(aq)+AgCl(s)$

This is a double displacement reaction in which the positive cation and negative anion of two reactants exchange their places to give two new products.

Hence, the reaction (C) is a neutralization reaction.

4 0

3 years ago

Read 2 more answers

Which of the following molecules is non polar? A.HF. B.HCN. C.NH3. D.CF4

torisob [31]

Answer:

D. CF4 is non polar.

Explanation:

8 0

3 years ago

How many oxygen atoms are present in 4.28 g of LiBroz sample?

Dafna11 [192]

Answer:

0.43×10²³ atoms

Explanation:

Given data:

Mass of LiBrO₂ = 4.28 g

Number of atoms of oxygen = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 4.28 g/ 118.84 g/mol

Number of moles = 0.036 mol

We can see 1 mole of LiBrO₂ contain 2 mole of oxygen atm.

0.036 mol × 2 = 0.072 mol

1 mole contain 6.022×10²³ atoms

0.072 mol × 6.022×10²³ atoms / 1mol

0.43×10²³ atoms

3 0

3 years ago

Which of the following elements in an alkali metal?

elena55 [62]

D sodium

I just learned this in my class today;)

3 0

3 years ago