A student investigated the effect of different concentrations of glucose solution on the mass of parsnip core samples. The table below shows the results of the investigation after the samples were left in the solutions for 45 minutes.
| Sample | Concentration of glucose solution (mol/dm3\text{mol/dm}^3mol/dm3) | Mass at start (g\text{g}g) | Mass after 45 minutes (g\text{g}g) | Change in mass (g\text{g}g) | Percentage (%) change in mass |
|---|---|---|---|---|---|
| A | 0.00 | 3.420 | 3.715 | +0.295 | +8.6 |
| B | 0.15 | 3.510 | 3.645 | +0.135 | +3.8 |
| C | 0.30 | 3.480 | 3.390 | -0.090 | -2.6 |
| D | 0.45 | 3.550 | 3.310 | -0.240 | -6.8 |
| E | 0.60 | 3.620 | 3.298 | -0.322 | YYY |
Based on the measurements in the table, what was the resolution of the balance used?
Calculate the value of YYY to 111 decimal place. Use the formula: Percentage change in mass=change in massmass at start×100\text{Percentage change in mass} = \frac{\text{change in mass}}{\text{mass at start}} \times 100Percentage change in mass=mass at startchange in mass×100
Estimate the concentration of glucose solution (in mol/dm3\text{mol/dm}^3mol/dm3) that would result in no change in mass of the parsnip core samples.