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1. ### 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

2. ### A metal ball-bearing with a circumference of 43.1 mm weighs 12.1 g. What is the density of the metal in g/cm3?

...the circumference to determine the volume: (43.1 mm)^3) / (6 π^2) = 1352.01 mm^3 = 1.35201 cm^3 (12.1 g) / (1.35201 cm^3) = 8.95 g/cm^3 [You didn't ask, but the...

1 Answers · Science & Mathematics · 12/09/2019

3. ### 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

4. ### barometric pressure is 749 mmHg. Calculate the barometric pressure in centimeters of water (d of Hg = 13.5 g/mL; d of H2O = 1.00 g/mL).?

...5 times as tall so 749 mmHg * 13.5 mmH2O/mmHg * 1 cm / 10 mm = 1011 cmH2O When you get a good response, please consider ...

2 Answers · Science & Mathematics · 06/05/2019

5. ### Chemistry help! A metal sample with a mass of 29.436g is added to 22.9mL of water in a graduated cylinder. The water rises to 26.2mL.?

Yes you have set up correctly answer is 8,92 g/cm^3

1 Answers · Science & Mathematics · 31/08/2019

6. ### 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

7. ### Chemistry: Dimensional analysis questions?

... = m / V = 5.32 oz x (28.35g / 1 oz) / ((3.1416 x (1.84cm)²(5.29 cm)) D = 2.68 g/cm³ .......... aluminum In this case the you are...

4 Answers · Science & Mathematics · 23/06/2019

8. ### 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

9. ### Stoichiometry question?

Put 1.6 mL buffer into 4 tubes. Add 0.4 mL of the original solution to the first tube. Mix. Remove 0.4 mL of that solution and transfer to the next tube. Mix. Remove 0.4 mL of that and add it to the third tube...

1 Answers · Science & Mathematics · 13/09/2019

10. ### Biochemistry lab math help!?

So using the Delta A and the extinction coefficient gives: 0.00324 DeltaA/s / 3600 M-1 = 9X10^-7 M/s X 10^6 umol/mole = 0.9 micromol / L / s Now, you need to multiply this by the volume of the reaction mixture in L to get straight...

1 Answers · Science & Mathematics · 09/05/2019