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i need help with 27-30
Question 27 4 pts An atom has the ground state electron...
Question 1 10 pts Choose the correct evidence of a chemical reaction for each of the...
Question 1 10 pts Choose the correct evidence of a chemical reaction for each of the following observations: a) adding a piece of zinc metal to acid causes bubbles to form [Select] b) mixing two colorless solutions gives a pink solution urse a permanent color change is obs c) adding potassium metal to water causes flames [Select) d) adding sodium chloride to a silver nitrate solution causes a white powder to form in the solution [Select
i need help with 1-6 i need help with questions 1-6 Question 1 8 pts Choose...
i need help with 1-6
i need help with questions 1-6
Question 1 8 pts Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A element [Select) > b) [Select) c) [Select) d) C10HSCIN2 (Select) Question 1 Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A eleme [Select] S...
i need help with 2,4,5,8,9,10-12 6 pts Question 2 A student designs an experiment to test...
i need help with 2,4,5,8,9,10-12
6 pts Question 2 A student designs an experiment to test the hypothesis: "If a solution of sucrose in water has a higher concentration, it will attract more ants." The student makes sucrose solutions with concentrations of 1.00,5.00, 10.50, 20.00 and 25.00% sucrose by mass, then leaves the solutions outside. After some time has passed, the student counts the number of ants that are in each beaker. The independent variable for this experiment is the:...
i need help with all these questions please Question 23 4 pts Which of these liquids...
i need help with all these questions please
Question 23 4 pts Which of these liquids is most likely to have the lowest (slowest) rate of evaporation (g/min) and why? Select the single best answer. H H H HH :01 IH terbaru H 11 HHH cnc- 7 H H H ica H 나 Hit 4 c B A ΟΟΟΟΟΟ C, because it has the highest molar mass. A, because this molecule has the lowest molar mass.. B, because it has...
need help ASAP Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
please quick help on those questions Question 10 1.5 pts An aqueous solution of HCl is...
please quick help on those questions
Question 10 1.5 pts An aqueous solution of HCl is added to an aqueous solution of NaOH in a coffee cup calorimeter. The reaction is that of neutralization between the acid and the base: HCI + NaOH + H2O + Naci To calculate the approximate enthalpy change for this reaction using q = m.CAT, what value should the student give to C in the equation? The student must use the heat of formation of...
i need help with questions 4, 5, 13, 15, 16 6 pts Question 4 Perform each...
i
need help with questions
4, 5, 13, 15, 16
6 pts Question 4 Perform each of the following calculations of the measured numbers and express your answer rounded to the appropriate number of significant figures. Only type the number for the final answer in the box (no units). a) 67.50 mL - 35.50 mL mL b) 5.35 cm x 10.00 cm x 0.50 cm = cm Question 5 4 pts A scientist defines a new unit, the mini-meter, which...
Please explain. 0/4 pts Question 5 Electrons exist in orbitals within an atom. Bohr's model described a single elec...
Please explain.
0/4 pts Question 5 Electrons exist in orbitals within an atom. Bohr's model described a single electron system well. But the energy level for orbitals change when as you add a second and more electron. In a single electron system, there are (a)_orbital(s) at the n-2 level. These n-2 orbital(s) exist at (b) sub-level(s) in the atom. In a multi-electron system, (c)_orbital(s) at the n-2 level. These n-2 orbital(s) exist at (d)sub-level(s) in the atom. Bohr was never...
i need help with 17-26 will be installed later What mass of aluminum reacts with 60.5...
i need help with 17-26
will be installed later What mass of aluminum reacts with 60.5 g of chlorine (Cl), according to the balanced chemical equation below: 2 A1 + 3Cl2 --> 2AICI 15.3g 30.78 23.03 46.03 5.10 7.678 4 pts Question 18 What volume of a 3.00 M solution of KCl is required to make 500.0 ml. of a 0.300 M solution of KCI? 3.00 mL 500 ml 300 mL 5.00 mL 16.7 ml 10.0 ml 500.0 ml Question...
NEED MAJOR HELP PLS! work shown would be greatly appreciated Question 4 2 pts If you...
NEED MAJOR HELP PLS! work shown would be
greatly appreciated
Question 4 2 pts If you add 126.45 mL of water to 18.99 mL of 3.36 M sodium hydroxide, what is the molarity (M) of the resulting solution? Use the dilution equation Mconc *V conc=Mdii * Vdil, where Mconc and Vconc are the molarity and volume of the stock (more concentrated) solution, respectively, and Mdil and Vdil are the molarity and final volume of the diluted solution. In this case...
Question 1 10 pts Choose the correct evidence of a chemical reaction for each of the following observations: a) adding a piece of zinc metal to acid causes bubbles to form [Select] b) mixing two colorless solutions gives a pink solution urse a permanent color change is obs c) adding potassium metal to water causes flames [Select) d) adding sodium chloride to a silver nitrate solution causes a white powder to form in the solution [Select
i need help with 1-6
i need help with questions 1-6
Question 1 8 pts Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A element [Select) > b) [Select) c) [Select) d) C10HSCIN2 (Select) Question 1 Choose the best classification for each of the following substances. a) a substance made from the combination of group 1A element and a group 7A eleme [Select] S...
i need help with 2,4,5,8,9,10-12
6 pts Question 2 A student designs an experiment to test the hypothesis: "If a solution of sucrose in water has a higher concentration, it will attract more ants." The student makes sucrose solutions with concentrations of 1.00,5.00, 10.50, 20.00 and 25.00% sucrose by mass, then leaves the solutions outside. After some time has passed, the student counts the number of ants that are in each beaker. The independent variable for this experiment is the:...
i need help with all these questions please
Question 23 4 pts Which of these liquids is most likely to have the lowest (slowest) rate of evaporation (g/min) and why? Select the single best answer. H H H HH :01 IH terbaru H 11 HHH cnc- 7 H H H ica H 나 Hit 4 c B A ΟΟΟΟΟΟ C, because it has the highest molar mass. A, because this molecule has the lowest molar mass.. B, because it has...
need help ASAP
Question 9 4 pts Exactly 1.100 g of CO2(g) was introduced into a 1.00-L flask that already contained some O2 gas. The flask was warmed to 100 °C and the total pressure was found to be 815 mmHg. No chemical reaction occurred between CO2 and 02. Calculate the mass of Oz in the flask. 1.12 g 02 O 0.160 g 02 O 0.754 g 02 O 0.820 g 02 O 0.321 g 02 1.5 pts Question 10...
please quick help on those questions
Question 10 1.5 pts An aqueous solution of HCl is added to an aqueous solution of NaOH in a coffee cup calorimeter. The reaction is that of neutralization between the acid and the base: HCI + NaOH + H2O + Naci To calculate the approximate enthalpy change for this reaction using q = m.CAT, what value should the student give to C in the equation? The student must use the heat of formation of...
i
need help with questions
4, 5, 13, 15, 16
6 pts Question 4 Perform each of the following calculations of the measured numbers and express your answer rounded to the appropriate number of significant figures. Only type the number for the final answer in the box (no units). a) 67.50 mL - 35.50 mL mL b) 5.35 cm x 10.00 cm x 0.50 cm = cm Question 5 4 pts A scientist defines a new unit, the mini-meter, which...
Please explain.
0/4 pts Question 5 Electrons exist in orbitals within an atom. Bohr's model described a single electron system well. But the energy level for orbitals change when as you add a second and more electron. In a single electron system, there are (a)_orbital(s) at the n-2 level. These n-2 orbital(s) exist at (b) sub-level(s) in the atom. In a multi-electron system, (c)_orbital(s) at the n-2 level. These n-2 orbital(s) exist at (d)sub-level(s) in the atom. Bohr was never...
i need help with 17-26
will be installed later What mass of aluminum reacts with 60.5 g of chlorine (Cl), according to the balanced chemical equation below: 2 A1 + 3Cl2 --> 2AICI 15.3g 30.78 23.03 46.03 5.10 7.678 4 pts Question 18 What volume of a 3.00 M solution of KCl is required to make 500.0 ml. of a 0.300 M solution of KCI? 3.00 mL 500 ml 300 mL 5.00 mL 16.7 ml 10.0 ml 500.0 ml Question...
NEED MAJOR HELP PLS! work shown would be
greatly appreciated
Question 4 2 pts If you add 126.45 mL of water to 18.99 mL of 3.36 M sodium hydroxide, what is the molarity (M) of the resulting solution? Use the dilution equation Mconc *V conc=Mdii * Vdil, where Mconc and Vconc are the molarity and volume of the stock (more concentrated) solution, respectively, and Mdil and Vdil are the molarity and final volume of the diluted solution. In this case...
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