Archive day

December 3, 2025

3,385 public questions were asked on this day.

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When iron pipes come in contact with water and oxygen, iron transfers electrons to the oxygen molecules. Which statement about the reactants is correct?(1 point) Responses Iron is the oxidizing agent. Iron is the oxidizi...
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Use the generalized equation to answer the question. A + BC → B + AC Which type of reaction is modeled by the equation? (1 point) Responses decomposition decomposition double replacement double replacement synthesis synt...
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Which generalized equation represents a double-replacement reaction?(1 point) Responses A + BC → B + AC A + BC → B + AC A + B → AB A + B → AB AB + CD → AD + CB AB + CD → AD + CB AB → A + B
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Under certain conditions, water can be separated into oxygen and hydrogen gases according to the equation 2H2O → 2H2 + O2. In a lab, 112g of hydrogen gas and 888g of oxygen gas were collected. Student A says that the amo...
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Use the periodic table to answer the question. The periodic table of elements shows element groups, periods, and element properties. How is an atom of the element xenon (Xe) likely to act during a chemical reaction? (1 p...
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Use the periodic table to answer the question. An illustration shows the periodic table of elements with elements arranged in increasing order of atomic number in 18 columns (groups) and 7 rows (periods). Which compariso...
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Which statement best describes a weak base?(1 point) Responses It donates protons and completely dissociates in water. It donates protons and completely dissociates in water. It donates protons and only partially dissoci...
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In an experiment involving a balloon, a scientist notices that the gas particles within the balloon begin to move faster, resulting in the balloon expanding. Which statement best describes the experiment?(1 point) Respon...
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A person is drinking a glass of soda with ice. Which option describes the relative kinetic energy of molecules in and above the soda in the glass?(1 point) Responses in: least energy above: greatest energy in: least ener...
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Use the diagram of the molecular structure of lactic acid to answer the question. An illustration shows the structure of lactic acid as C single bond C with functional groups CH3 and OH attached to the first C atom and O...
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Use the image of chlorophyll to answer the question. An illustration shows the structure of the chlorophyll molecule as a long chain of carbon atoms forming hexagonal and pentagonal structures at one end and a long tail...
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Use the periodic table to answer the question. An illustration shows the periodic table of elements. Which of the following elements are most likely to form an ionic bond? (1 point) Responses S and Cl S and Cl K and Cl K...
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Hydrogen is in Group 1 of the periodic table. Which kind of bond would form between two hydrogens?(1 point) Responses A metallic bond would form because both atoms are metals. A metallic bond would form because both atom...
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How did the study of the atom contribute to our understanding of the periodic table of the elements?(1 point) Responses Atoms are representative of elements, so scientists scaled up atomic characteristics to understand e...
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Which is considered a dwelling coverage? (1 point) Responses It provides financial protection in case someone else is hurt and/or injured on your property for which you are found liable. It provides financial protection...
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Why is it important to cite empirical evidence when making claims or justifying an interpretation?(1 point) Responses Evidence shapes a claim or interpretation. Evidence shapes a claim or interpretation. Evidence is foun...
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What is life insurance?(1 point) Responses It is often sponsored by the employer as part of benefits and provides protection to an employee while they cannot work and therefore earn enough money. It is often sponsored by...
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Use the sentence to answer the question. Light is affected by gravity. Which inference can be made based on this fact? (1 point) Responses Stronger gravity causes an increase in light. Stronger gravity causes an increase...
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You read a social media post making a claim. How do you identify its trustworthiness?(1 point) Responses Its trustworthiness depends on the social media website; certain social media posts are not trustworthy. Its trustw...
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Use the table to answer the question. Running Swimming Biking Total 13-14 years old 36 21 68 125 15-16 years old 44 89 47 180 17-18 years old 66 50 29 145 Total 146 160 144 450 Given that someone is 15-16 years old, what...
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What is conditional probability?(1 point) Responses the chance that a certain event will occur given that another event has occurred the chance that a certain event will occur given that another event has occurred a set...
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How is a two-way frequency table used to approximate conditional probabilities?(1 point) Responses by adding the two conditions and dividing by the total for the entire two-way frequency table by adding the two condition...
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Use the table to answer the question. Sports Preferences According to Age Group Sports Preference Grade Soccer Preference Football Preference Total 9th Grade 21 4 25 10th Grade 15 10 25 11th Grade 16 9 25 12th Grade 18 7...
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Use the table to answer the question. Sports Preferences According to Age Group Sports Preference Age Group Basketball Soccer Football Total 6–15 years old 4 37 9 50 16–25 years old 28 10 12 50 26–35 years old 3 6 41 50...
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Use the table to answer the question. Fruits and Genre Preferences Fruit Preference Genre Preference Apple Preference Pear Preference Total Comedy 12 10 22 Drama 8 20 28 Total 20 30 50 Given that someone likes comedy, wh...
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