By Sharon Wynne
ISBN-10: 160787847X
ISBN-13: 9781607878476
Read Online or Download MTTC Chemistry 18 Teacher Certification Test Prep Study Guide, 2nd Edition (XAM MTTC) PDF
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Extra info for MTTC Chemistry 18 Teacher Certification Test Prep Study Guide, 2nd Edition (XAM MTTC)
Example text
Instead of a random error with random fluctuations, there is a biased result that on average is too large or small. 3 Evaluating the accuracy and precision of a measurement in a given situation A measurement is precise when individual measurements of the same quantity agree with one another. For example, three arrows that land very close to each other on a target are precise. A measurement is accurate when it agrees with the true value of the quantity being measured. As an example, an arrow that lands on or near the bull’s-eye is accurate.
A test tube has a rounded bottom and is designed to hold and to heat small volumes of liquid. A Pasteur pipet is a small glass tube with a long thin capillary tip and a latex suction bulb, and it is used for transferring small amounts of liquid from one contained to another. CHEMISTRY 34 TEACHER CERTIFICATION STUDY GUIDE A crucible is a cup-shaped container made of porcelain or metal for holding chemical compounds when heating them to very high temperatures. A watch glass is a concave circular piece of glass that is usually used as surface for evaporating a liquid and observing precipitates or crystallization.
The last remaining digit increases by one. 772 g to two significant digits. 8 g. 3) If the leftmost digit to be removed is a five that is followed by nonzero digits, then round up. The last remaining digit increases by one. 502 g to two significant digits. Answer 19 g. 4) If the leftmost digit to be removed is a five followed by nothing or by only zeros, then force the last remaining digit to be even. If it is odd then round up by increasing it by one. If it is even (including zero) then it stays as it was.
MTTC Chemistry 18 Teacher Certification Test Prep Study Guide, 2nd Edition (XAM MTTC) by Sharon Wynne
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