Archive day

January 16, 2026

4,278 public questions were asked on this day.

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When calculating your final total, including sales tax, you must _____. (1 point) Responses multiply the sales tax percentage by the original cost of the purchase (before any discounts are applied) and then add it to tha...
Asked by Name 1 answer
Based on the results of this lab, write a short paragraph that summarizes how to distinguish physical changes from chemical changes.
Asked by jay 1 answer
Which change would decrease the pH of a base in a solution at equilibrium?(1 point) Responses decreasing the concentration of OH– ions decreasing the concentration of O H superscript minus ions increasing the strength of...
Asked by vccccc 1 answer
Therefore, rust is a change. A piece of rusted barbed wire.
Asked by jay 1 answer
_____ is an additional amount added to the total purchase price. (1 point) Responses Discount Discount Sales price Sales price Percentage off Percentage off Sales tax Sales tax
Asked by Name 1 answer
Use the information in the table to answer the question. Acid Solutions with their pH Values Acid pH of Solution HA 5.6 HB 3.9 HC 4.7 Which list shows the acidic solutions in order from least conductive of electricity to...
Asked by vccccc 1 answer
Percentages are _____. (1 point) Responses expressing how many out of 100 expressing how many out of 100 able to be written as a decimal able to be written as a decimal able to be written as a fraction out of 100 able to...
Asked by Name 1 answer
Hydrochloric acid is a strong acid. Acetic acid is a weak acid. Which statement about hydrochloric acid and acetic acid is correct?(1 point) Responses A solution of hydrochloric acid at equilibrium will have a greater co...
Asked by vccccc 1 answer
Another real-world example of a change is rust. Rust is iron(III) oxide (Fe2O3), which results when iron is exposed to oxygen and water. What are some indicators of rusting? Check all that apply. production of light colo...
Asked by jay 1 answer
Which acid-base chemical reaction is irreversible?(1 point) Responses weak acid added to water weak acid added to water water on its own water on its own weak base added to water weak base added to water strong acid adde...
Asked by vccccc 1 answer
You purchase 3 packs of batteries at $11.99/ pack. You have a coupon for 10% off and the sales tax is 7%. How much is the total cost of your purchase? (1 point) Responses $38.49 $38.49 $32.37 $32.37 $34.64 $34.64 $30.11...
Asked by Name 1 answer
Which real-world scenarios below represent physical changes? Check all that apply. running a car engine exploding fireworks mixing water and powdered drink mix combining oil and vinegar to make salad dressing taking aspi...
Asked by jay 1 answer
You purchase a stereo that originally costs $250 but is marked 10% off. The sales tax is 5%. How much of your total purchase cost is sales tax? (1 point) Responses $12.50 $12.50 $11.25 $11.25 $262.50 $262.50 $236.25
Asked by Name 1 answer
To calculate the total purchase price of on-sale items with a 6% sales tax, you must ____. (1 point) Responses add the original prices and multiply by 6% add the original prices and multiply by 6% add the sales prices an...
Asked by Name 1 answer
How did the experiement with boiling water compare with the experiment in which magnesium was added to hydrochloric acid? Both resulted in gas formation. Both resulted in temperature change. Both involved chemical change...
Asked by jay 1 answer
Which option correctly shows the concentration of H3O+ ions in pure water (pH 7) ?(1 point) Responses 7 mol/L 7 mol/L 1.0 x 10–14 mol/L 1.0 x 10 superscript minus 14 mol/L 14 mol/L 14 mol/L 1.0 × 10–7 mol/L 1.0 × 10 supe...
Asked by vccccc 1 answer
Sales tax is _____. (1 point) Responses sent to the state government sent to the state government a percentage of your total purchase that is added to the purchase a percentage of your total purchase that is added to the...
Asked by Name 1 answer
Which pattern in electronegativity do elements in the periodic table display?(1 point) Responses Electronegativity increases from left to right within a row of the periodic table. Electronegativity increases from left to...
Asked by vccccc 1 answer
How did the experiement with the iron filings and sulfur compare with the experiment in which copper(II) sulfate pentahydrate was heated? Both resulted in gas formation. Both resulted in color change. Both involved chemi...
Asked by jay 1 answer
Which statement best describes the difference between a substance with a pH of 3.0 and a substance with a pH of 6.0?(1 point) Responses The substance with the higher pH has twice as many hydrogen ions per volume of water...
Asked by vccccc 1 answer
How are acids and protons related? (1 point) Responses An acid can donate protons to a base when they react. An acid can donate protons to a base when they react. An acid can accept a proton from a base when they react....
Asked by vccccc 1 answer
hich reactions performed in the experiment involved chemical changes? crushing calcium carbonate mixing calcium carbonate and HCl boiling water heating copper (II) sulfate pentahydrate separating iron filing and sulfur m...
Asked by jay 1 answer
Which answer below correctly identifies the changes you observed and the explanation when a candle burns? physical change because the wax melted and changed shape chemical change because light and heat were formed as the...
Asked by jay 1 answer
You are buying two bags of potato chips at the grocery store. You have a manufacturer’s coupon for $0.50 off and the store is offering 50% off if you buy two bags. One bag of potato chips costs $2.00. The discounts are s...
Asked by Name 1 answer
Look at the steps for solving the equation and choose a true statement. 3x−9x+1=2(−3x+1)−1 −6x+1=−6x+2−1 −6x+1=−6x+1 (1 point) Responses There are infinitely many solutions to the equation. There are infinitely many solu...
Asked by tomdaya 1 answer