QUIZ SCIENCE: write down the answers pls i need help.

1. Name the products formed if calcium is added to a beaker of nitric acid.

3.Give two observations that a student would make if calcium is added to a beaker of nitric acid.. Single line text.

4.) 44, What is the meant by the term base?. Single line text.

5)no 55, Explain the difference between a strong and weak acid.

6)Explain the difference between a strong and weak acid.

7) Write equations (balanced) for the reaction of nitric acid with each of the following.

(i) sodium
(ii) magnesium oxide
(iii) ammonia

Complete the chemical equation. Water acts as the acid.

NH3 + H20 -> +

Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction