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Questions in chemistry

[Terjawab] 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]

[Terjawab] 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

[Terjawab] 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.

[Terjawab] 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.

[Terjawab] Which is classified as an inner transition element? A. calcium B. copper C. fermium D. helium

[Terjawab] How many molecules of SF6 are in [tex]$25.0 g SF _6$[/tex]? ([tex]$1 mol SF _6=146.06 g$[/tex]) ([tex]$1 mol SF _6=6.02 \times 10^{23}$[/tex] molecules) [?] [tex]$\times 10^{[?]}$[/tex] molecules [tex]$SF _6$[/tex] Enter the coefficient and the exponent.

[Terjawab] How is hydronium ion $H_3O^+$ formed?

[Terjawab] Which statement describes an electron? A. It has a positive charge and is located in the nucleus. B. It has a positive charge and is located in orbitals around the nucleus. C. It has a negative charge and is located in the nucleus. D. It has a negative charge and is located in orbitals around the nucleus.

[Terjawab] Which of the following is a chemical property? mass flammability melting point volume temperature

[Terjawab] The very first surfactants were A. cooking oils B. motor oils C. nail polishes D. soaps