When repeated measurements of the same quantity are very close to one another they are termed as precise measurements.
<u>Explanation:
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An experiment is repeated two to three times and the outcomes were checked to have similar values to attain precision of the measurements. The accuracy and precision are the important in attaining correct measurements.
The accuracy is the closest true value obtained from the measuring instrument. But to get precise results, the measurements were taken repeatedly and then analyzed whether the values obtained are similar or varying significantly.
If the repeatedly measured values are very close to one another that means the measured quantities are precisely taken. All the values are precise in nature.
I believe it is "They have hydroxide ions" because bases are usually made up of hydroxide ions and other element ions.
They should report the density as 1.11 g/L
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Density = mass/volume = 2.260g/2.04 mL
My calculator says the density <em>1.107 843 137 g/mL</em>
However, the answer can have <em>no more</em> significant figures than are in the number with the <em>fewest </em>significant figures.
The volume measurement has only three significant figures, so we must round off the density to three significant figures.
We drop all the digits after the zero.
The digit to be dropped is 7, so we <em>round up </em>the last significant figure of the answer.
1.10<u>7 843 137</u> → 1.11
Two very big differences between Kelvin and Celsius: 1. Kelvin has no negative numbers, 2. All Celsius amounts are 273 degrees less than it’s equal kelvin amount
