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Questions in chemistry

📝 Answered - Which of the following factors most directly contributes to the polarity of water? A. Uneven shape B. Overall abundance C. Large size D. High mass

📝 Answered - Will magnesium and fluorine atoms most likely form an ionic bond or a covalent bond? Write the name and formula of the compound made of magnesium and fluorine.

📝 Answered - Which of the following sets of quantum numbers describe valid orbitals? Check all that apply. [tex]$n=1, l=0, m=0$[/tex] [tex]$n=2, l=1, m=3$[/tex] [tex]$n=2, I=2, m=2$[/tex] [tex]$n=3, l=0, m=0$[/tex] [tex]$n=5, l=4, m=-3$[/tex] [tex]$n=4, l=-2, m=2$[/tex]

📝 Answered - The equation shows a neutralization reaction. [tex]H_2 SO_4+2 NaOH \rightarrow Na_2 SO_4+2 H_2 O[/tex] What is [tex]Na _2 SO _4[/tex]? A. an acid B. a base C. a salt D. an ion

📝 Answered - Which statement best describes the relationship between activation energy and rate of reaction? A. Increasing the activation energy can increase the rate of a reaction. B. Reducing the activation energy can increase the rate of a reaction. C. Increasing the reaction energy does not alter the rate of reaction. D. Reducing the activation energy can decrease the rate of a reaction.

📝 Answered - What happens to a substance at critical temperatures? A) The substance can't change its state, only its temperature. B) The substance changes its state only if it gains thermal energy. C) The substance can't lose any more thermal energy. D) The substance changes its state if it continues gaining or losing thermal energy.

📝 Answered - Type the correct answer in each box. Which chemical symbols will complete the equation for this single displacement reaction? [tex]2 NaBr+Cl_2 \rightarrow 2 \square \square+\square 2[/tex]

📝 Answered - Which refers to a mixture that contains more than one phase in which the characteristics of the particles vary throughout the mixture? A. compound B. element C. heterogeneous D. homogeneous

📝 Answered - How did students with a growth mindset differ from those with a fixed mindset in a challenging Ivy League organic chemistry course? A. They experienced more stress about their grades. B. They performed worse overall in the course. C. They were more likely to avoid the course entirely. D. They reported enjoying the course more and achieved higher grades.

📝 Answered - Analyze the potential energy diagram of the reaction shown. [tex]\begin{array}{l} CH_4+2 O_2 \rightarrow 2 H_2 O+CO_2+891 kJ \end{array}[/tex] [tex]\begin{array}{l} CO_2+H_2 O \end{array}[/tex] Time Which statements about the reaction are true? Select all that apply. A. The reaction is exothermic B. The reaction is endothermic C. The equation shows that 891 kJ of energy are released as a product. D. The equation shows that 891 kJ of energy are absorbed as a reactant. E. The graph shows that the reactants have greater potential energy than the products.