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As we know that there are various objects and a lot of even biological organisms are invisible to naked eye . there are several reasons behind this fact what do you think Does it mean that their properties also differ from a classical model of matter?
A 13.7g sample of an unknown gas occupies 15.5L at a temperature of 17 CELSIUS and a pressure of 743 mmHg. What is the molar mass of the gas
The true rate constant for a reaction is just that, a constant( at the constant temperature). Would your calculated value for k be higher than, lower than, or equal to the real value of k if 5 wt% bleach was unknowingly substituted with 8wt% bleac..
If 275 g of liquid water at 100.°C and 475 g of water at 30.0°C are mixed in an insulated container, what is the final temperature?
The specific heat of a certain type of cooking oil is 1.75 J/(g·°C). How much heat energy is needed to raise the temperature of 2.69 kg of this oil from 23 °C to 191 °C
The mineral galena is composed of lead (II) sulfide and has anaverage density of 7.46 g/cm3.(a) how many moles oflead(II) sulfide are in 3.58ft3 of galena b. How many Lead (ii) atoms are in 1.99dm3 of galena
A 0.5000-g sample containing NaHCO3, Na2CO3, and H2O was dissolved and diluted to 250.0 mL. A 25.00-mL aliquot was then boiled with 50.00 mL of 0.01255 M HCl. After cooling, the excess acid in the solution required 2.34 mL of 0.01063 M NaOH when t..
Calculate the radiation dosage (in grays) for an 57-kg person that is exposed for 3.0 seconds to a 3.0 Ci source of beta radiation.
Calculate the total pressure (in atm) of a mixture of 0.0270 mol of helium, He, and 0.0200 mol of oxygen, O2, in a 4-L flask at 20°C. Assume ideal gas behavior.
prepare 3.9L of a HCN/NaCN buffer that has a pH of 9.70 and an osmotic pressure of 1.27atm at 298K. What masses of HCN and NaCN should you use to prepare the buffer
Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 295mL of coffee from 25.0 C to 62.0 C ? Assume that the coffee has the same density, 0.997 g/mL , and specific heat capacity, 4.184 J(gxK) , as..
A chemist performed a titration experiment in order to determine the concentration of a given aqueous solution of HCl (an acid). She pipeted 25.00 mL of the HCl solution into an Erlenmeyer flask.
Determine the number and symmetry of the vibrational modes in the molecule (trans-1,2-dichloroethylene). how many resonances would you expect to see in the IR spectrum
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