Chem 1 fall final review

Chem 1 fall final review

Assessment

Flashcard

Science

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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14 questions

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1.

FLASHCARD QUESTION

Front

What is precision in data measurement?

Back

Precision refers to how close a set of data points are to each other, regardless of whether they are close to the actual or accepted value.

2.

FLASHCARD QUESTION

Front

What is accuracy in measurement?

Back

Accuracy describes how close a measurement is to the accepted or true value.

3.

FLASHCARD QUESTION

Front

What does a bullseye with data points clustered together but far from the center represent?

Back

It represents low accuracy and high precision.

4.

FLASHCARD QUESTION

Front

What is the conversion factor for moles to particles?

Back

1 mol = 6.02 x 10^23 particles.

5.

FLASHCARD QUESTION

Front

How many moles are in 78 atoms of sodium (Na)?

Back

To find moles, use the conversion factor: 78 atoms x (1 mol / 6.02 x 10^23 particles).

6.

FLASHCARD QUESTION

Front

What is the balanced equation for the reaction of PCl5 with H2O?

Back

PCl5 + 4 H2O → 5 HCl + H3PO4.

7.

FLASHCARD QUESTION

Front

Define significant figures.

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in a decimal.

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