The number of moles present in 180 grams of hydrochloric acid is approximately __ 4.75 5.00 4.25 4.50

2 mol of an ideal diatomic gas are cooled at constant volume until the pressure is reduced to $1/3$ the initial pressure . What is the entropy change of the gas? A. $-63.9J/K$ B $+63.9J/K$ C. $-9.13J/K$ D. 0 E. $-45.6J/k$

Carnotite $(K_{2}(UO_{2})_{2}(VO_{4})_{2})$ and is one of 3 common vanadium ores. Vanadium metal can be extracted from this ore as pure vanadium. If you start with 985 g of carnotite, what is the maximum number of grams of V that can be extracted? A. 59.2 grams B. 98.5 grams C. 118 grams D. 120 grams E. 130 grams

How many moles contain $5.75\times 10^{24}$ atoms of Al? $9.55\times 10^{2}$ $2.13\times 10^{23}$ mol 9.55 mol 2.13 mol

Which among the following statements is NOT TRUE regarding a mole? A mole is the SI unit to measure the amount of substance. $1mole=6.02\times 10^{23}representative\quad particles=Avogadro's\quad number$ The representative particle of most of the elements is a molecule. A "representative element"refers to the species present in the substance.

Which of the following representations is correct for a chemical equation? $Reactants=products$ $Reactants\rightarrow Products$ $Products\rightarrow Reactants$ $Reactants+products\rightarrow Products+reactants$

The number of moles of C in 3 moles of ethanol $(CH_{3}CH_{2}OH)$ is __ $6.02\times 10^{23}mol$ 6 mol 18 mol $4.5\times 10^{23}mol$

How many atoms does a mole of atoms contain? $6.022\times 10^{23}atoms$ $60.22\times 10^{23}atoms$ $6.202\times 10^{23}atoms$ $6.082\times 10^{23}atoms$

How many molecules are there in 75 grams of aluminum triflouride? $5.68\times 10^{23}$ $5.38\times 10^{23}$ $5.98\times 10^{23}$ $6.23\times 10^{23}$

How many moles of sodium atoms are there in 4.4 grams of sodium carbonate? A. \$2.5\times 10^{22}\$ moles \begin{array}{|c|c|c|} \hline 6\ &\ 8\ &\ 11\ \\ C\ &\ 0\ &\ Ns\ \\ 12.01\ &\ 16.00\ &\ 23.00\ \\ \hline \end{array} B. \$5.0\times 10^{22}\$ moles C. 0.04 moles D. 0.08 moles E. 0.12 moles

Question 8 of 10 Why do metals conduct electricity? A. All covalent bonds conduct electricity. B. Metals never give up electrons. C. A lattice of ions allows valence electrons to move easily. D. The electrons in metals are inside the nuclei of the atoms.