48 When an atom of the unstable isotope Na-24 decays, it becomes an atom of Mg-24 because the Na-24 atom spontaneously releases (1) an alpha particle (3) a neutron (2) a beta particle (4) a positron

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Which expression is a measurement of density?0.71 mg5.2 cm320 g/cm25.13 kg/L

Which of the following are redox reactions? p4 (s) + 10hclo (aq) + 6h2o (l) →4h3po4 (aq) + 10hcl (aq) br2 (l) + 2k (s) →2kbr (s) ch3ch2oh (l) + 3o2 ( g.→3h2o (l) + 2co2 ( g. zncl2 (aq) + 2naoh (aq) →zn (oh) 2 (s) + 2nacl (aq)

An unbalanced chemical equation is shown: 2CaO + 2H2O → Ca (OH) 2 Which of the following statements explains why the equation is not balanced? Four molecules of Ca (OH) 2 should be produced during the decomposition reaction.

Explain how a bond forms between sodium and chlorine in sodium chloride (NaCl).

Calculate the molar solubility of ca (io3) 2 in each solution below. the ksp of calcium iodate is7.1 * 10-7.

At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.07 m by 3.00 m by 3.77 m? Answer in units of kg.

A gas made up of atoms escapes through a pinhole 0.155 times as fast as h2 gas. write the chemical formula of the gas.

Calculate the mass percent composition of lithium in Li3PO4. A) 26.75 % B) 17.98 % C) 30.72 % D) 55.27 % E) 20.82 %

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