General Chemistry Answers

given 95 weight% of HCL and Given density is 1.08g/mol

find the molarity of HCL

calculate the number of tonnes of CO2 equivalent of 80 kg of N2O

why must all the remaining solutions need to be transferred into the volumetric flask?

A student heats up a liquid from an unknown initial temperature (T1) to 54 °C with the thermal energy of 6 575 cal. 

If the mass of the liquid is 4 kg and its specific heat capacity is 100 J/ kg- °C, (1 cal = 4.184 J; 1000 g = 1 kg)

If the atomic weight of an element is 112.41 u, what is the mass in grams of 6.02 x 10²³ atoms of the element?

A particular brand of beef jerky contains 0.0552 % sodium nitrite (NaNO₂) by mass and is sold in an 8 oz (1 oz = 28.35 g) bag. What mass of sodium does the sodium nitrite contribute to the bag of beef jerky?

. Sea water contains an average of 1.08 x 103 ppm of Na+ and 270 ppm of SO4-2. Calculate 

a. The molar concentration of Na+and SO4-2 given that the average density  of sea water is 1.02 g/mL 

b. The pNa and pSO4 for sea water 

1- Make the following conversions:

Liquid flow rate: 1 cubic feet/min (sfm) = .... m³/s

Permeability: 1 cm³ (STP).cm/cm².s.cmHg = .... m³ (STP).m/m².hr.Pa

Gas flux: 1 million standard cubic feet/day (MSCFD)= .... m³(STP)/hr

A support layer for a composite membrane has a nitrogen flux of 5.102 cm³ (STP)/cm².s.cmHg. What is the flux in m³(STP)/m².h.bar and mol/m².s.Pa?

Calcium carbide, CaC₂, is manufactured by reducing lime with carbon at high temperature. (The carbide is used in turn to make acetylene, an industrially important organic chemical.)

CaO(s)+3C(s)→CaC₂(s)+CO(g)

CaO(s)+3C(s)→CaC₂(s)+CO(g)   ΔH=464.8kJ

ΔH=464.8kJ 

Calculate the quantity of energy, in MJ, transferred when a metric ton(1000 kg) of CaC₂(s) is manufactured.

Ca = 40 g/mol

C = 12 g/mol

O = 16 g/mol