unit 1 review. 1. how many significant figures does 0.0023050 have? a.7 b.3 c.8 d.5
TRANSCRIPT
![Page 1: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/1.jpg)
Unit 1 review
![Page 2: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/2.jpg)
1. How many significant figures does 0.0023050 have?
A. 7B. 3C. 8D. 5
![Page 3: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/3.jpg)
2. Which safety rule should always be followed during labs?
A. Closed toes shoesB. No eatingC. Long hair in a pony tailD. All of the above
![Page 4: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/4.jpg)
3. The element symbol “S” stand for
A. SulfurB. SodiumC. StrontiumD. Tin
![Page 5: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/5.jpg)
4. All of these are physical properties, except
A. DensityB. Boiling pointC. ReactivityD. Hardness
![Page 6: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/6.jpg)
5. Which of the following is NOT a chemical change?
a. Heat producedb. Meltingc. Bubbles emergingd. Precipitate forming
![Page 7: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/7.jpg)
6. An example of a homogeneous mixture is
A. OxygenB. Vegetable soupC. AirD. Carbon dioxide
![Page 8: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/8.jpg)
7. 45 cm equals
A. 0.45 kmB. 0.45 mC. 0.45 mmD. 0.45 dm
![Page 9: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/9.jpg)
8. The symbol for the element magnesium is
A. MnB. MoC. MgD. Ni
![Page 10: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/10.jpg)
9. The particles in a solid are
A. Very far apartB. Packed closely togetherC. Not moving at allD. Able to slide past each other
![Page 11: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/11.jpg)
8. What is the density of a 68 g piece of iron with a volume of 8.6 cm3 ?
A. 58.5 g/cm3
B. 1.3 g/cm3
C. 7.9 g/cm3
D. 5.5 g/cm3
![Page 12: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/12.jpg)
11. Which of the following pieces of equipment do you use to measure volume?
A. Ring standB. Graduated cylinderC. ForcepsD. Evaporation dish
![Page 13: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/13.jpg)
12. The correct answer for 94.21/8.3 is
A. 10B. 11C. 11.4D. 11.35
![Page 14: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/14.jpg)
13. Which of the following element name and symbol is correct?
A. Potassium, PB. Copper, CC. Fluorine, FlD. Bromine, Br
![Page 15: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/15.jpg)
14. A hypothesis is a
a. Well tested explanation for an observationb. Proposed explanation for an observationc. Summary of results of many observationsd. Procedure for testing an onservation
![Page 16: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/16.jpg)
15. Physical methods can be used to separate
A. Pure substancesB. MixturesC. ElementsD. Compounds
![Page 17: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/17.jpg)
16. Which of the following techniques can NOT be used to separate mixtures?
a. Burningb. Filtrationc. Evaporationd. Distillation
![Page 18: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/18.jpg)
17. Steam can be considered a
A. SolidB. LiquidC. GasD. Vapor
![Page 19: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/19.jpg)
18. Which of the following is NOT an SI unit?
A. sB. KC. mD. L
![Page 20: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/20.jpg)
19. Which of the following is NOT a chemical reaction?
A. BurningB. BoilingC. RustingD. Oxidizing
![Page 21: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/21.jpg)
20. Which of the following statements is true?
I. Gas has a indefinite shape and volumeII. Mass can be created
A. I onlyB. II onlyC. Both I and IID. Neither I nor II
![Page 22: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/22.jpg)
21. A Kelvin reading of 125 K is the same as
A. -148 oCB. 398 oCC. -125 oCD. 125 oC
![Page 23: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/23.jpg)
22. An example of an intensive property is
A. LengthB. Boiling pointC. MassD. Volume
![Page 24: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/24.jpg)
23. Which of the following is a heterogeneous mixture?
A. Table saltB. SucroseC. Salad dressingD. Baking soda
![Page 25: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/25.jpg)
24. 0.0035 x 105 in correct scientific notation is
A. 3.5 x 108
B. 3.5 x 102
C. 3.5 x 10-5
D. 3.5 x 104
![Page 26: Unit 1 review. 1. How many significant figures does 0.0023050 have? A.7 B.3 C.8 D.5](https://reader033.vdocuments.mx/reader033/viewer/2022051019/5697c0141a28abf838ccd080/html5/thumbnails/26.jpg)
• 1. D 7. B 13. D 19. B• 2. D 8. C 14. B 20. A• 3. A 9. B 15. B 21. A• 4. C 10. C 16. A 22. B• 5. B 11. B 17. D 23. C• 6. C 12. B 18. D 24. B