5. Which of the following students obtained precise but not accurate measurement

Question

5. Which of the following students obtained precise but not accurate measurements? Carmen Chasbry Chery (B) Cynthia (C) Carmen (D) Chastity (A) Cheryl What is the percent relative uncertainty of the following measurement? (A) 0.02% The absolute uncertainty and the percent relative uncertainty of the following 6. 32.45 t0.02 mL (B) 0.04% (C) 0.06% (D) 0.14% 7. calculation are andrespectively and_ 9.23 (0.03) +4.21 (+0.02)-3.26 (+0.06) (A) 0.07 & 0.69% (B) 0.1 1 & 1.1% (C):0.01 & 0.10% (D) t0.11 & 11% 8. A student recorded the following data in the laboratory notebook. Initial Buret Reading 0.20 mL Final Buret Reading 32.65 mL If the uncertainty in each reading is +0.02 mL, what is the volume of titrant delivered? (A) 32.45 (t 0.02) mL (C) 32.45 (t 0.04) mL (B) 32.45 (t0.03) mL (D) 32.85 (t0.03) mL 9. What is the molecular mass of NaCI (t uncertainty) expressed with the correct number of significant figures? Atomic masses: Na = 22.989770 ± 0.000002 amu Cl-35.453 +0.002 amu (A) 58.443 0.002 amu (C) 58.443770 t 0.002 amu (B) 58.443 t0.045 amu (D) 58.442 t0.002 amu 10. A Class-A 50.00 mL pipet (with an absolute uncertainty of +0.05 mL) was used to deliver 100.00 mL of a solution. Calculate the absolute uncertainty in the volume delivered. (A) : 0.03 (B) t0.07 (C) +0.10 (D)+0.22

Explanation / Answer

5)

Precession is the measure of closeness of measured values.

Accurate is a measure of closeness of measured values with the true value or accepted value.

In the given case, if the black spots on the board are closer to one another, it is precise.

If the black spots are closer to the center of board (target), it is accurate.

Cheryl measurements are nither precise not accurate.

Cynthia measurements are accurate but not precise.

Camen measurements are accurate aswell precise.

Chastity measurements are preciese but not accurate.

Therefore, the answer is option (D).

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.