CHM1206 tutorial worksheet #1

Hi, can someone pls tell me if these answers are correct and help me find the answers to the ones I didn't know, thanks ?

The oxides of nitrogen are very important components inurban air pollution. Name each of the following compounds:(a) N2O, (b) NO, (c) NO2, (d) N2O5, (e) N2O4.

Refer to the attached photo. Thank you!

21. Based on your understanding of the relationships between the structures and physical properties of elements and compounds, which of the substances (Table 1) is most likely a metallic element? Why? Explain your reasoning in at least two (2) sentences.

For some questions you will need to use the special periodic table attached in the images below! Treat Je, Qu, Ap, and Bg as NONMETALS! A) Enter the balanced chemical equation for the reaction of 2-bogusopropanoic acid with KOH. B) Enter the balanced equation for the ionization of 2-bogusopropanoic acid in water.

Consider these compounds: A. Ag2CO3 B. MgF2 C. Pb3(PO4)2 D. Ca3(PO4)2 Give detailed Solution with explanation needed. don't give Handwritten answer Complete the following statements by entering the letter(s) corresponding to the correct compound(s). (If more than one compound fits the description, include all the relevant compounds by writing your answer as a string of characters without punctuation, e.g, ABC.) Without doing any calculations it is possible to determine that barium phosphate is more soluble than and barium phosphate is less soluble than It is not possible to determine whether barium phosphate is more or less soluble than by simply comparing Ksp values.

The hydroxides formed by three elements of period 3 are given in the following table.   Period Group 1A Group 2A Group 3A Period 3 NaOHNaOH Mg(OH)2Mg(OH)2 Al(OH)3Al(OH)3 Period 4 ? ? ?   Write the chemical formulas for the hydroxides formed by the corresponding elements in period 4 for groups 1A, 2A, and 3A.

7.What is the point of silicon dioxide? 8. Why are careful stoichiometric calculations important for air bags and safety?

Predict the formula for a compound made from X+ and Y. Insert subscripts as needed. formula: XY SPECIAL ΑΣΩ (s) (1) (aq)

Some salts make hydrates when there is moisture around. Some hydrate samples can absorb lights in visible legion. Therefore, they show some colors. Thus, hydrates can be used to detect the moisture in the environment. Let's say you are working in a laboratory with a group and you are the only student who has taken chemistry courses. Your laboratory received a sample of cobalt(iI) chloride which has the formula CoCl2xH20. Let's say your boss asked you to find the formula of this hydrate salt sample since you are the only chemist there. From your laboratory experience, simply explain the experimental procedure you would follow to find the formula of this unknown sample. Then, use the given data for the calculation part. Mass of crucible: 32.27g Mass of crucible + unknown hydrate: 33.92 g Color of unknown hydrate: purple Mass of crucible + anhydrous form of hydrate: 33.41 g Color of anhydrous form: sky blue

17. Give the number of protons and electrons in (a) an N 2 molecule ( identified in 1772 ). (b) a N3 unit (synthesized in 1890).

Q3c(i) & c(ii)