The mass of an object is 205 gram while the volume was measured to be 82.5 ml. what is this object's density?

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.

Which change to the system wood cause the freely-moving piston to lower?