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1. ### What current would be required to deposit 2.08 m2 of chrome plate having a thickness of 0.037 mm in 4.50 hr from a solution of H2CrO4?

...of Cr deposited = (2.08 × 100² cm²) × (0.037/10 cm) = 76.96 cm³ Mass of Cr deposited = (76.96 cm³...

1 Answers · Science & Mathematics · 01/05/2019

2. ### A metal (FW 396.8 g/mol) crystallises into a body-centered cubic unit cell and has a radius of 2.26 Angstrom.?

... density is (1.3178/1.4215) x 10^4 (kg/m^3) = 9270.4 kg/m^3 = 927 g/cm^3. My only beef with Fern's answer is that it is...

2 Answers · Science & Mathematics · 28/05/2019

3. ### (NIST) kinetics database lists the rate constant, k, of a particular gaseous reaction as 6.82× 10–10 cm3·molecule–1·s –1 at 298 K.?

1) (6.82 × 10^–10 cm^3·molecule^–1·s^–1) / (1000 cm^3/L) x (6.022 x 10^23 molecule/mol) = 4.107004...

1 Answers · Science & Mathematics · 14/04/2019

4. ### What kind of Metal can float from bottom of a glass of water ?

...less than 1.00 will 'float' ... Lead has a density of about 12g/cm^3 so it does not float All group 1 metals, Li, ...

3 Answers · Science & Mathematics · 04/03/2019

5. ### the difference is 18cm?

18 cm = 180 mm. 760 mm of Hg = 1 atm so 180 mm Hg = 0.237 atm Depending which side is higher, the gas pressure is either 0.95 atm + 0.237 atm or 0.95 atm - 0.237 atm

2 Answers · Science & Mathematics · 05/03/2019

6. ### Write out the balanced chemical equation for ethanol fermentation. Calculate theoretical...?

...21.613 g CH3CH2OH in theory (21.613 g CH3CH2OH) / (0.7893 g/cm^3) = 27.38 cm^3 = 27.38 mL

1 Answers · Science & Mathematics · 19/02/2019

7. ### Calculate the density of a solid cube that measures 2.53 cm on each side and has a mass of 432 g. Answer in units of g/cm3.?

(432 g) / (2.53 cm)^3 = 26.7 g/cm^3

3 Answers · Science & Mathematics · 20/02/2019

8. ### Vapor pressure calculation?

... at 20°C. The second source below says 0.99820 g/cm^3 for water and 0.791 g/cm^3 for ethanol. (32.0 mL ethanol) x (0.791 g/...

2 Answers · Science & Mathematics · 15/02/2019

9. ### Do you round during calculations when you need proper significant figures?

Keep everything until the end of the calculation. Then round to the least sig fig. It's a little more complicated than that, but that's the basic rule of thumb.

2 Answers · Science & Mathematics · 04/02/2019

10. ### 2. 667 cm of gas changes in temperature from 431 kelvin to 41.00 Celsius. What is the final volume of the gas?

Supposing the pressure remains constant, and supposing the units on 2.667 to be cm^3: (2.667 cm^3) x (41.00 + 273.15) K / (431 K) = 1.94 cm^3

1 Answers · Science & Mathematics · 29/01/2019