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.
- 18 Figure 7 shows the displayed formulae equation for the reaction of nitrogen with hydrogen. Figure 7 [ mathrm(N) equiv mathrm(N)+mathrm(SH)-mathrm(H) longrightarrow 2 mathrm(H)-mathrm(N)-mathrm(H) ] H In the reaction the energy released forming new bonds is 93 mathrm(kJimol) greater than the energy needed to break existing bonds. Table 3 shows bond energies. Table 3 Bond & mathrm(N)=mathrm(N) & mathrm(H)-mathrm(H) & mathrm(N)-mathrm(H) Bond energy in mathrm(kJ) / mathrm(mol) & 945 & mathrm(X) & 391 Bond & mathrm(N)=mathrm(N) & mathrm(H)-mathrm(H) & mathrm(N)-mathrm(H) Bond energy in mathrm(kJ) / mathrm(mol) & 945 & mathrm(X) & 391 0 longdiv ( 5 ) cdot 3 Calculate the bond energy mathrm(X) for the mathrm(H)-mathrm(H) bond. [5 marks] Use Figure 7 and Table 3. omega arrow
- Connie wa s m aking sodium chloride by adding an acid to an alkali. She followec the progre ss of th e reaction with a pH sensor.What else could she have used to detect when the rea ction was te?
- A) 1.3E-1 moles B) 8.0E-1 moles C) 1.3E-2 moles D) 80 moles E) 8.0E2 moles How many moles of tungsten atoms are there in 4.8E25 atoms of tungsten?1 point
- voill 1. A __ sign between reactants shown that they are reacting with each other 2. An __ bond involves the transfer of one or more electrons from one atom to another. 3. A molecule can be made of two or more stoms of the same element, or of elements such as H2O 7. When energy is released during a chemical reaction, this is known as a __ reaction. B. The law of __ of matter noilher created nor destroyed 9. A chomical __ is a way of expressing the numbers and types of atoms in a compound. 11. A substance that is formed as a result of a reaction in called a __ 12. When the same number of atoms of each element is found on both sides of the equation, then it is known as __ equation. 16. __ with the same number of valence electrons are found in the same group on the periodic table because they exhibit similar chemical properties. 18. A combination of two or more atoms is called a __ tor 20. A substance that undergoes a change in a chemical ns. ronction is a __ other atoms so that 26. As a rule atoms tend to combine with each atom has __ electrons in its outer shell.
- Can simple COVALENT compounds CONDUCT electricity? Around 50% can NO, never YES, but only as solids YES, always