Is it correct to say that only one observable change accompanies a chemical change?

At 3 atm pressure the volume of gas is 1200ml. What pressure is required to reduce the volume of the gas to 300ml if the temperature remains constant

Which of the following contains the smallest amount of matter

What is the mass of strontium chloride that reacts with 300.0 g of sulfuric acid?

If 0.0714 moles of N2 gas occupies 1.25 L space, how many moles of N2 have a volume of 25.0 L? Assume temperature and pressure stayed constant.

41Ca decays by electron capture. The product of this reaction undergoes alpha decay. What is the product of this second decay reaction? 41Ca decays by electron capture. The product of this reaction undergoes alpha decay.

0.100 mol of CaCO3 and 0.100 mol CaO are placed in an 10.0 L evacuated container and heated to 385 K. When equilibrium is reached the pressure of CO2 is 0.220 atm. 0.

What is true about the charges of transition metal ions?

A gas obeys the ideal-gas equation of state P V = N k T, where N = n NA is the number of molecules in the volume V at pressure P and temperature T and n is the number of gm-moles of the gas.

76. Which of the following choices is not an example of an adaptation? A. Nocturnal animal species have large eyes. B. One member of a wolf litter is born with shorter legs than its siblings. C.

Which is more dense a pound of rice or a pond of cement