Pre Test Day 2

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For Grade 10 students

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Ma'am Dane

Philippines

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Pre Test Day 2


Pre Test Day 2Version en ligne For Grade 10 students par Ma'am Dane 1 During the lesson, your teacher will teach you the molar mass that tells the mass of one mole of a substance. What do you think is the unit used for the molar mass? a Gram (g) b Mole (mol) c Gram per mole (g/mol) d Kilograms (kg) 2 A student is preparing water (H2O) for an experiment. Using the atomic masses H = 1 and O = 16, what is the molar mass of H2O? a 16 g/mol b 17 g/mol c 18 g/mol d 20 g/mol 3 A laboratory uses carbon dioxide (CO2) insn investigation. Using C = 12 and O = 16, what is the molar mass of CO2? a 28 g/mol b 32 g/mol c 44 g/mol d 46 g/mol 4 Three students calculated the molar masses of Ammonia (NH2). This is their answer; Anna - 14 g/mol Ben - 17 g/mol Cara - 20 g/mol Using N = 14 and H = 1, whose answer is correct? a Anna b Ben c Cara d All of them 5 Paolo calculated the molar mass of H₂O as 17 g/mol. Which explanation best describes his mistake? a He counted one hydrogen atom only. b He forgot to include the oxygen atom. c He added one extra oxygen atom. d He used the atomic mass of carbon instead of oxygen. 6 A student says, "Carbon dioxide (CO₂) and water (H₂O) have the same molar mass because both contain oxygen." How should you evaluate this statement? a Correct, because both compounds contain oxygen. b Correct, because every compound has the same molar mass. c Incorrect, because molar mass depends on all the atoms in the formula. d Incorrect, because oxygen has no mass 7 During a laboratory activity, four groups calculated the molar mass of carbon dioxide (CO₂) using the atomic masses C = 12 and O = 16. ● Group A: 28 g/mol ● Group B: 32 g/mol ● Group C: 44 g/mol ● Group D: 48 g/mol Which group's calculation should the teacher accept? a Group A b Group B c Group C d Group D 8 Your group needs to choose a compound with a molar mass of about 58.5 g/mol for a laboratory activity. Which compound should your group select? a H₂O b CO₂ c NaCl d NH₃ 9 A student is making a guide on how to calculate molar mass. Which sequence should be included in the guide? a Count the atoms → Use atomic masses → Add all the masses. b Add the number of moles → Find the volume → Multiply by mass. c Measure the volume → Find the color → Add the masses. d Count the particles → Multiply by Avogadro's number.

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Pre Test Day 2

Test

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Pre Test Day 2Version en ligne

par Ma'am Dane

During the lesson, your teacher will teach you the molar mass that tells the mass of one mole of a substance. What do you think is the unit used for the molar mass?

A student is preparing water (H2O) for an experiment. Using the atomic masses H = 1 and O = 16, what is the molar mass of H2O?

A laboratory uses carbon dioxide (CO2) insn investigation. Using C = 12 and O = 16, what is the molar mass of CO2?

Three students calculated the molar masses of Ammonia (NH2). This is their answer; Anna - 14 g/mol Ben - 17 g/mol Cara - 20 g/mol Using N = 14 and H = 1, whose answer is correct?

Paolo calculated the molar mass of H₂O as 17 g/mol. Which explanation best describes his mistake?

A student says, "Carbon dioxide (CO₂) and water (H₂O) have the same molar mass because both contain oxygen." How should you evaluate this statement?

During a laboratory activity, four groups calculated the molar mass of carbon dioxide (CO₂) using the atomic masses C = 12 and O = 16. ● Group A: 28 g/mol ● Group B: 32 g/mol ● Group C: 44 g/mol ● Group D: 48 g/mol Which group's calculation should the teacher accept?

Your group needs to choose a compound with a molar mass of about 58.5 g/mol for a laboratory activity. Which compound should your group select?

A student is making a guide on how to calculate molar mass. Which sequence should be included in the guide?