Answer:
54.5 mL
Explanation:
Let's consider the following balanced equation.
Na₂CO₃(aq) + 2 HNO₃(aq) → 2 NaNO₃(aq) + CO₂(g) + H₂O(l)
44.2 mL of 0.108 M Na₂CO₃ solution react. The moles of Na₂CO₃ that react are:
0.0442 L × 0.108 mol/L = 4.77 × 10⁻³ mol
The molar ratio of Na₂CO₃ to HNO₃ is 1:2. The moles of HNO₃ that reacted are 2/1 × 4.77 × 10⁻³ mol = 9.54 × 10⁻³ mol
9.54 × 10⁻³ moles of HNO₃ are in a 0.175 M solution. The required volume of HNO₃ is:
9.54 × 10⁻³ mol × (1 L/0.175 mol) × (1000 mL/1 L) = 54.5 mL
Answer:
D. Carbon.
Explanation:
Carbon can be mixed with Many things. for example, YOU are mostly made out of carbon. Other things include furniture, clothing, plastics, charcoal, pencil led, diamonds, and gas.
Explanation:
is there a picture to this
I would have to say D) carbon-to-hydrogen ratio
Answer:
0.4429 m
Explanation:
Given that mass % of the ethanol in water = 2%
This means that 2 g of ethanol present in 100 g of ethanol solution.
Molality is defined as the moles of the solute present in 1 kilogram of the solvent.
Given that:
Mass of 
= 2 g
Molar mass of = 46.07 g/mol
The formula for the calculation of moles is shown below:
Thus,
Mass of water = 100 - 2 g = 98 g = 0.098 kg ( 1 g = 0.001 kg )
So, molality is:
<u>Molality = 0.4429 m</u>
