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ElenaW [278]
3 years ago
13

What is the percent by mass of hydrogen in aspirin (c9h8o4)?

Chemistry
2 answers:
laiz [17]3 years ago
7 0

Answer:The percent by mass of hydrogen in aspirin is 44.4%.

Explanation:

The molar mass of the Aspirin ,C_9H_8O_4:

9\times 12 u+8\times 1 u+4\times 16 u= 180 u

Mass of hydrogen present in one formula unit of Aspirin: 8\times 1 u=8 u

\text{mass percentage of hydrogen}=\frac{\text{total mass of hydrogen in Aspirin}}{\text{Molar mass of the Aspirin}}\times 100

\text{mass percentage of hydrogen}=\frac{8 u}{180 u}\times 100=4.44\%

The percent by mass of hydrogen in aspirin is 44.4%.

d1i1m1o1n [39]3 years ago
3 0
Calculate the Mr of aspirin, next workout the percentage of H/aspirin

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what volume of co2 is produced at stp when 270g of glucose are consumed in the following reaction? c6h12o6 + 6o2(g) -&gt; 6co2 (
lana [24]

Answer:

202 L

Explanation:

Step 1: Write the balanced equation

C₆H₁₂O₆ + 6 O₂(g) ⇒ 6 CO₂(g) + 6 H₂O(l)

Step 2: Calculate the moles corresponding to 270 g of C₆H₁₂O₆

The molar mass of C₆H₁₂O₆ is 180.16 g/mol.

270 g × 1 mol/180.16 g = 1.50 mol

Step 3: Calculate the moles of CO₂ generated from 1.50 moles of glucose

The molar ratio of C₆H₁₂O₆ to CO₂ is 1:6. The moles of CO₂ formed are 6/1 × 1.50 mol = 9.00 mol

Step 4: Calculate the volume of 9.00 moles of CO₂ at STP

The volume of 1 mole of an ideal gas at STP is 22.4 L.

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4 0
3 years ago
Write the net ionic equation for the reaction between hydrocyanic acid and potassium hydroxide. Do not include states such as (a
eimsori [14]

Answer:

The net ionic equation is as follows:

HCN(aq) + OH-(aq) ----> H20(l) + CN-(aq)

Explanation:

The reaction between Hydrocyanic acid, HCN, and sodium hydroxide is a neutralization reaction between a weak acid and a strong base.

Hydrocyanic acid being a weak acid ionizes only slightly, while sodium hydroxide being a strong base ionizes completely. The equation for the reaction is given below:

A. HCN(aq) + NaOH-(aq) ----> NaCN(aq) + H2O(l)

Since Hydrocyanic acid is written in the aqueous form as it ionizes only slightly and the ionic equation is given below:

HCN(aq) + Na+(aq)+OH-(aq) ----> Na+(aq)+CN-(aq) + H2O(l)

Na+ being a spectator ion is removed from the net ionic equation given below:

HCN(aq) + OH-(aq) ----> H20(l) + CN-(aq)

4 0
3 years ago
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