The element Na, si, and p are?

A in the same group

B isotops

C have the same number of p

D in the same period

E all of these

The atomic mass of gold is 197 g/mole, and the density of gold is 19.3 g/cm3. using this information along with the measured value of young's modulus, calculate the speed of sound in gold.

The enthalpy of a reaction is + 270 kJ/mol. What can you determine about the reaction? O A. It is spontaneous. O B. It is endothermic. O C. It is nonspontaneous. O D. It is exothermic.

Which of the following can form an aqueous solution that conducts electricity? Group of answer choices sucrose, C12H22O12 Pb (NO3) 2 O2 ethylene glycol (antifreeze), HOCH2CH2OH ethanol, CH3CH2OH

Which elements have the most similar chemical properties? A. H, Be, Sc B. Fr, Ra, Rf C. Ti, V, Cr D. Be, Ca, Ra

How does this splitting wedge make work easier? A) increases the applied force (A is incorrect) B) decreases the applied force C) changes the direction of the applied force D) changes the direction and amount of applied force

Based on the enthalpy changes given for the reactions, which reactions are endothermic? (check all that apply) 2H2O → 2H2 + O2, ΔH = 484 kJ C + O2 → CO2, ΔH = - 394 kJ H2 + Br2 → 2HBr, ΔH = - 73 kJ 2NH3 → N2 + 3H2, ΔH = 92 kJ

Which of the following is not true about performing biological investigations reading and understanding Metric system

At 29°C, Kp = 5.3 ✕ 102 atm-2 for the following reaction. N2 (g) + 3 H2 (g) equilibrium reaction arrow 2 NH3 (g) When a certain partial pressure of NH3 (g) is put into an otherwise empty rigid vessel at 29°C, equilibrium is reached when 55.

If ice is heated at constant pressure of 0.0512 ATM will it

The sun's inner core is the hottest part of the sun true or false