Archive day

January 14, 2026

2,984 public questions were asked on this day.

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Carlos is hoping to save at least $200 in the next four weeks. His mom gives him $30, and he earns money each Saturday morning at his grandmother’s store. Write an inequality for the amount of money Carlos will need to e...
Asked by sjscj b 1 answer
Use the image to answer the question. A number line ranges from 0 to 10 in 1 unit increments. An open point is labeled and plotted at 7.25. An arrow extends from that point to the right and goes beyond 10. The number lin...
Asked by sjscj b 1 answer
Use the image to answer the question. A number line ranges from 50 to 400 in 50 unit increments. An open point is plotted on the 250 mark. An arrow extends from that point to the left and goes beyond 50. The number line...
Asked by sjscj b 1 answer
Use the image to answer the question. A number line ranges from 0 to 25 in 1 unit increments. An open point is labeled and plotted at 18.5. An arrow extends from that point to the right and goes beyond 25. The number lin...
Asked by sjscj b 1 answer
2. How would you make 100 mL of a carbonic acid buffer at 0.5 M and pH = 6.0 using 1.0 M NaHCO3 and either 1.0 M NaOH or 1.0 M HCl and water? (Show your work.)
Asked by g 1 answer
Right triangle ABC has side lengths AB=7 , BC=24 , and AC=25 . A second right triangle, A′B′C′ , has side lengths of 50, 14, and 48. Find the ratio of the side opposite ∠A to the hypotenuse of triangle ABC . Use this rat...
Asked by t 1 answer
A factory produces beach umbrellas. They have a fixed cost they must pay no matter how many umbrellas they produce, and a variable cost they must pay for each umbrella they produce. The cost of producing x umbrellas is m...
Asked by h 1 answer
How are mutations and meiosis similar?(1 point)ResponsesThey both impact the phenotypes of somatic cells.They both impact the phenotypes of somatic cells.They both can pass on genetic variations that can be inherited.The...
Asked by h 1 answer
How are mitosis and meiosis similar?(1 point)ResponsesThey produce daughter cells with the same number of chromosomes.They produce daughter cells with the same number of chromosomes.They are both caused by mutations.They...
Asked by h 1 answer
How are somatic cells different from gametes?(1 point)ResponsesSomatic cells contain half the number of chromosomes.Somatic cells contain half the number of chromosomes.Somatic cells do not go through cell division. Soma...
Asked by h 1 answer
A new species of plant is found in the rainforest. How can genotyping help scientists to determine what the plant is?(1 point)ResponsesCan determine where the species originated from and which group migrated it to the ra...
Asked by h 1 answer
When magnesium chloride (MgCl2) is dissolved in water, which statement must be true?(1 point) Responses The mass of the Mg2+ ions and the mass of the Cl–minus ions must each be equal to the mass of MgCl2subscript. The ma...
Asked by iuytrewedtjk 1 answer
How many molecules of carbon dioxide (CO2) are there in 0.450 mol of carbon dioxide?(1 point) Responses 5.42×1023 5 point 4 2 times 10 to the 23th power 2.71×1023 2 point 7 1 times 10 to the 23th power 1.34×1024 1 point...
Asked by iuytrewedtjk 1 answer
The molar mass of ammonia (NH3) is 17.03 g/mol. Which expression correctly shows how to determine the number of moles of ammonia equivalent to 5 g?(1 point) Responses 5 g×1 g17.03 mol 5g times 1 g over 17 point 03 mol 5...
Asked by iuytrewedtjk 1 answer
Question A scientist uses 3 g of water (H2O) in an experiment. Which option describes the first step in calculating the number of molecules in 3 g of water?(1 point) Responses Determine the molar mass of water. Determine...
Asked by iuytrewedtjk 1 answer
Which statement describes the quantities that can be found using the number of moles?(1 point) Responses It can be used to find the number of molecules, but not atoms or ions. It can be used to find the number of molecul...
Asked by iuytrewedtjk 1 answer
1 can explain why an ionic compound forms using concepts of attractive force and electronegativity Two students draw the Bohr models of sodium and chlorine and attempt to explain how they can form an ionic bond using the...
Asked by miley 1 answer
Hydrogen and oxygen react to produce water according to the following equation. 2H2+O2→2H2O The molar mass of hydrogen gas ( H2 ) is 2 g/mol . The molar mass of oxygen gas ( O2 ) is 32 g/mol . When the reaction starts wi...
Asked by iuytrewedtjk 1 answer
page 14 of 14 Specific Mass Conversions Quick Check 4 of 54 of 5 Items Question Use this chemical equation to answer the question. A+2B→AB2 The molar mass of A is 8 g/mol . The molar mass of B is 12 g/mol . Which option...
Asked by iuytrewedtjk 1 answer
Nitrogen gas and hydrogen gas react to produce ammonia according to the following equation. N2+3H2→2NH3 The atomic mass of nitrogen is 14 g/mol . The atomic mass of hydrogen is 1 g/mol . When the reaction produces 68 gra...
Asked by iuytrewedtjk 1 answer
Nitrogen gas and hydrogen gas react to produce ammonia according to the following equation. N2 + 3H2 → 2NH3 Which ratio of components is correct? (1 point) Responses For every 3 moles of hydrogen gas, the reaction produc...
Asked by iuytrewedtjk 1 answer
How does stoichiometry support the law of conservation of mass?(1 point) Responses It compares the mass of the reactants to the number of moles of reactants. It compares the mass of the reactants to the number of moles o...
Asked by iuytrewedtjk 1 answer
In the 2nd episode of my series, a sadistic and charismatic teenager decides to start going to church, at the suggestion of his new kindhearted friend. What are good ideas for an episode title?
Asked by g 1 answer
joey
Asked by g 1 answer
Use the image to answer the question. Does the Pythagorean Theorem apply to this triangle? How do you know? (1 point) Responses No, because the triangle is not a right triangle. No, because the triangle is not a right tr...
Asked by nonbya 1 answer