A student measures the volume of a solution to be 0.01370 have 5 significant digits in this measurement.
<h3>What are significant digits?</h3>
The significant digits are the minimum number from zero to nine for reporting any measurement where the digits are uncertain.
The significant digits starting from zero are not significant digits, decimal is not a significant digit, and ending zero after the decimal are significant digits.
Therefore, the student measures the volume of a solution to be 0.01370 5 significant digits are in this measurement.
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Answer:
La cantidad de Ca3 (P04) 2 equivalente a 15, 4 moles es de 4774 gramos.
Explanation:
We need the weights of the elementos Ca, P and O, for calculate the weight of 1 mol:
Weight Ca=40 g
Weight P=31 g
Weight 0 = 16 g
Weight Ca3(PO4)2 = 3 x 40 g + 2 x (31 g + 4 x 16 g)
Weight Ca3(PO4)2 =310 g
1 molCa3(PO4)2---- 310 g
15, 4 mol Ca3(PO4)2-----x=(15, 4 molx 310 g)/1 mol = 4774 g
Answer:
U = 129.053 KJ/m².h
Explanation:
overall heat transfer coefficient (U):
U = (<em>m</em>Cp(ToutH2O - TinH2O))/[A((ToutAir - TinH2O)-(TinAir - ToutH2O))/(Ln(ToutAir - TinH2O)/(TinAir - ToutH2O))]
∴ A = 925 m²
H2O:
∴ mass flow H2O (<em>m</em>) = 45500 Kg/h
∴ Cp H2O = 4186 J/Kg°C
∴ Tin = 80°C
∴ Tout = 150°C
Air:
∴ Tin = 350°C
∴ Tout = 175°C
⇒ U = ((45500Kg/h)(4186J/Kg°C)(150-80))/(925m²)[((175-80)-(350-150))Ln((175-80)/(350-150))]
⇒ U = (1.333 E10 J/h)/(925m²)[(-150)Ln(0.475)]
⇒ U = 129052.73 J/m².h = 129.053 KJ/m².h
Answer:
IMP Electronic Systems have provided the military and aerospace industries with the design, manufacture, repair, overhaul, and product improvement of avionics, electronic systems, and wire harness assemblies.
Answer:
The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog (- pH).
I hope what I just explained is enough .
