Which equation below represents the heat of formation of Ca(OH)2 (s)?

The correct product(s) of the following reaction are  Mg    +  HCl     →

Under a certain set of conditions, 4.5 ml of He effuses in 1.07 min. The same volume of another unknown gas effuses in 4.5 min. Which of the following gasses could be the unknown gas?

What is the partial pressure of Ne in a container with a total pressure of 3.0 atm at 25 C, that contains 1.0 g of H2  and 1.0g of Ne?

PCl5(s) reacts with H2O(l) according to the equation: PCl5(s) + 4H2O(l) ® H3PO4(aq) + 5HCl(aq) What is ∆H˚ for this reaction in kJ/mol, given the following heats of formation?   PCl5 (s) H2O(l) H3PO4 (aq) HCl(aq) ∆Hf˚, kJ/mol –443.5 –285.8 –1284.4 –167.1

To check lateral excursions of the TMJ, ask the patient to open and close his mouth. To check TMJ range of motion, ask the patient to place three fingers in his mouth between the upper and lower incisors.

Quaternary ammonium agents in a dentifrice;

Test:  Jun2PM_Chemistry-SL_P1.pdf Jun2PM_Chemistry-HL_P1.pdf Chemistry Data Booklet  Once you are ready to submit, please scan and upload your work as a single PDF file. Upload all scratch paper used as well. Please upload your work as a single PDF file.   To retrieve your work via Gmail with Honor Lock enabled, use the link below: https://mail.google.com/mail/u/0/#inboxLinks to an external site. If you are using Airdrop, you can ignore this instruction. 

Which of the following statements are correct when reading a dental charting?

Test:  Jun2PM_Chemistry-SL_P2.pdf Jun2PM_Chemistry-HL_P2.pdf Chemistry Data Booklet  Once you are ready to submit, please scan and upload your work as a single PDF file. Upload all scratch paper used as well. Please upload your work as a single PDF file.   To retrieve your work via Gmail with Honor Lock enabled, use the link below: https://mail.google.com/mail/u/0/#inboxLinks to an external site. If you are using Airdrop, you can ignore this instruction.