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January 2026

45,417 public questions were asked this month.

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Recent questions

Latest from January 2026

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
Check all appropriate safety precautions for handling each of the three items shown. A beaker about two-thirds full of a liquid. Check all that apply. Pour using tongs. Wear chemical resistant gloves. Taste to make sure...
Asked by jay 1 answer
ONLY ONE Which number is rational? (1 point) Responses 2√4 the fraction with numerator square root of 2 and denominator 4 0.98989898... 0.98989898... 0.23242526... 0.23242526... 15−−√
Asked by tomdaya 1 answer
Which number is rational? (1 point) Responses 2√4 the fraction with numerator square root of 2 and denominator 4 0.98989898... 0.98989898... 0.23242526... 0.23242526... 15−−√
Asked by tomdaya 1 answer
How many irrational numbers are there between 11−−√ and 17−−√ ?(1 point) Responses four numbers four numbers twenty-eight numbers twenty-eight numbers an infinite number an infinite number six numbers six numbers
Asked by tomdaya 1 answer
Which irrational number is between 14−−√ and 18−−√ ?(1 point) Responses 19−−√ start root 19 end root 15−−√ start root 15 end root 10−−√ start root 10 end root 13−−√
Asked by tomdaya 1 answer
Show an example of a rational number that is between 10−−√ and 11−−√ pick one .(1 point) Responses 3.4 3.4 165 Start Fraction 16 over 5 end fraction 3.1 3.1 103 Start Fraction 10 over 3 end fraction
Asked by tomdaya 1 answer
Show an example of a rational number that is between 10−−√ and 11−−√ .(1 point) Responses 3.4 3.4 165 Start Fraction 16 over 5 end fraction 3.1 3.1 103 Start Fraction 10 over 3 end fraction
Asked by tomdaya 1 answer
What is the least integer whose square root is an irrational number between 5 and 7?(1 point) Responses 26 26 13 13 25 25 6 6
Asked by tomdaya 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. The discounts are stackable. How do you compute your fin...
Asked by Name 1 answer
Show an example of an irrational number between 9 and 11.(1 point) Responses 99−−√ start root 99 end root 10−−√ start root 10 end root 20−−√ start root 20 end root 100−−−√
Asked by tomdaya 1 answer
“Stackable” coupons _____. (1 point) Responses allow you to add a discount onto another discount allow you to add a discount onto another discount cause you to choose which discount to use cause you to choose which disco...
Asked by Name 1 answer
Store brands have a tendency to be _____. (1 point) Responses the same cost as brand names the same cost as brand names less expensive than brand names less expensive than brand names more expensive than brand names more...
Asked by Name 1 answer
You buy 2 gallons of milk at $2.48/gallon, 3 gallons of ice cream at $1.49/gallon, and 5 lbs of strawberries at $0.58/lb. What is your total cost? (1 point) Responses $12.33 $12.33 $4.55 $4.55 $10.01 $10.01 $7.53
Asked by Name 1 answer
Hypothesis: If a material undergoes a chemical change, then it will not retain its original properties because a new substance is formed. To test the hypothesis above, you will observe the changes during the experiment....
Asked by jay 1 answer