Chemistry Homework Assistance

QuestionAI's chemistry problem solver is a middle school chemistry tutoring tool that summarises key chemical reactions and equations in real-time, featuring a robust learning system to empower even those with a weak foundation in chemistry.

You needn't fret over the elemental properties of the periodic table anymore. Here, you can effortlessly access chemical reactions and reaction principles corresponding to each element. Deductive reasoning from microscopic phenomena to discern the original structure of molecules and atoms is a research technique we staunchly champion.

Question 7 Which of the following statements is/are chemical changes? - LRusting of a nail II. Freezing of water III. Decomposition of water into hydrogen and oxygen gas land land III alone lalone Points 3

500 ml of nitrogen and 500 ml of hydrogen are kept together in one vessel at the same constant temperature and pressure. Which of the following is true for their number of molecules? N_(N2)gt N_(H2) N_(N2)lt N_(H2) N_(N2)=N_(H2) N_(N2)+N_(H2)=1 mole

Lab E quipment Name each piece of equipment that would be useful for each of the follo . Holding 100mL of water (ebkare) __ Measuring 27 mL of liquid (daudgtear Idnreiyc) __ Measuring exactly 43mL of an acid (rtube) __ lassing out 120 g of sodium chloride (acbnela) __ spending glassware over the Bunsen burner (rwei zeagu)

Complete each sentence with the correct vocabu- lary word(s). 1. The __ are located to the left of the stair-step line on the periodic table. 2. Different structural forms of the same element are called __ 3. Positively charged ions are surrounded by freely moving electrons in __ 4. A(n) __ is a molecule comprised of two atoms. 5. The __ are in Groups 3 through 12 on the periodic table. Checking Concepts Choose the word or phrase that best answers the question. 6. When magnesium and fluorine react, what type of bond is formed? A) metallic C) covalent B) ionic D) diatomic 7. What type of bond is found in a piece of pure gold? A) metallic C) covalent B) ionic D) diatomic 8. Because electrons move freely in metals, which property describes metals? A) brittle C) dull B) hard D) conductors

10. & multicolumn(2)(|c)( In the following diagram, what ) & mathrm(C) & on & Carbon & Nitr 8 & 12.0 & 14 & ( )^14 & a. An atomic number b. A number of electrons c. An atomic mass d. A chemical symbol