Full Question:
Aqueous sulfuric acid H2SO4 will react with solid sodium hydroxide NaOH to produce aqueous sodium sulfate Na2SO4 and liquid water H2O. Suppose 94g of sulfuric acid is mixed with 49.9g of sodium hydroxide. Calculate the minimum mass of sulfuric acid that could be left over by the chemical reaction. Be sure your answer has the correct number of significant digits.
Answer:
32.8725g
Explanation:
First thing's first, we write out the balanced chemical equation;
2NaOH + H2SO4 --> Na2SO4 + 2H2O
The question hints that sulphuric acid would be in exess by asking to calculate the minium mass that would be left over.
We proceed by calculatng the amount of sulphuric acid that would react with 49.9g of sodium hydroxide.
From the reaction,
2 moles of NaOH reacts with 1 mole of H2SO4.
Calculate moles of sodium hydroxide:
Molar mass of NaOH= 40.0 g/mol
Mass of NaOH = 53 g
moles = Maass / Molar mass = 1.2475
This means 1.2475 would react with x number of moles;
2 = 1
1.2475 = x
x = 1.2475 / 2 = 0.62375
Mass of Sulphuric acid reacted = moles * molar mass = 0.62375 * 98 = 61.1275g
Mimium mass of left over = 94 - 61.1275g = 32.8725g
The original change is chemical, affecting the main colorant because of temperature. Paint, is a surface change, not changing anything about the leaf itself, but showing a different color to your eye.
Answer:
6.33 years
Explanation:
In this question, we determine the NPER or the time period that is shown in the attached spreadsheet
Given that,
Present value = (9% × $1,000) ÷ (8.75%) = $1,028.57
Assuming figure Future value = $1,000
Rate of interest = 8.4%
PMT = $1,000 × 9% = $90
The formula is shown below:
= NPER(Rate;PMT;-PV;FV;type)
The present value come in negative
So, after solving this, the answer would be 6.33 years
because ice is water but in a solid form
Answer:
A Bunsen bumper,named after Robert Bunsen, is a kind of gas burner used as laboratory equipment;it produces a single open gas flame ,and used for heating ,sterilization,and combustion. The gas can be natural gas (which is mainly methane) or a liquefied petroleum gas,such as propane,butane,or a mixture
Explanation:
