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A 3 gallon mixture contains one part S and two parts R In order to change it to a mixture containing 25 percent S how much R should be added?
Call the unknown amount of substance R to be added a. The mixture initially contains 1 gallon of S combined with 2 gallons of R. After the addition, the mixture will contain the oiginal 1 gallon of S and (2 + a) gallons of R. In order for the content of S to be 25 % after the mixing, 1 gallon must equal 0.25(1 + 2 + a)gallons, or (1 - 0.75)gallons = (0.25)a, or a = 0.25/0.25 = 1 gallon.
What else can I help you with?
How does the concentration of marbles in the mixture change as sand is removed?
As sand is removed from a mixture containing marbles and sand, the concentration of marbles increases. This is because the total volume of the mixture decreases while the amount of marbles remains the same, leading to a higher ratio of marbles to the total mixture. Consequently, the relative abundance of marbles becomes more pronounced as the sand decreases.
What happens to the chemical properties of a substance when it becomes part if a mixture?
Depends of course of what substances the mixture contains. Depending of the substances in a solution or mixture as you typed, the properties of each one or all of them may be altered when heated up, or when those substances do not combine chemically each other.
IronIII reacts with thiocyanate to form a red complex formula. what change we will observe if we add a solution containing ironIII to this mixture?
When a solution containing iron(III) is added to the mixture, the red complex formed with thiocyanate will likely become lighter in color or change to a different color due to the formation of a new complex involving iron(III). This change is a result of a chemical reaction between iron(III) and the components of the existing complex.
What is the change in weight of sac 1 containing 40 percent glucose suspended in distilled water?
The weight change of sac 1 containing 40 percent glucose suspended in distilled water will depend on the osmotic pressure gradient between the sac's contents and the surrounding solution. If the distilled water outside the sac is hypotonic compared to the glucose solution inside, water will move into the sac, causing it to gain weight. Conversely, if the external solution is hypertonic, water will exit the sac, resulting in weight loss. The actual change will depend on the specific conditions and volumes involved.
What were at least five observations you made that indicated a reaction had occurred in part a?
Color change in the reaction mixture. Formation of a gas, indicated by bubbles or fizzing. Change in temperature of the reaction mixture. Formation of a precipitate, where a solid appears in the mixture. Production of a new odor or change in smell of the reaction mixture.
Is macaroni a chemical change or mixture?
Macaroni is a mixture not a change.
How do you reverse the process of making a mixture a physical change?
= a mixture is physical change... =
How does the concentration of marbles in the mixture change as sand is removed?
As sand is removed from a mixture containing marbles and sand, the concentration of marbles increases. This is because the total volume of the mixture decreases while the amount of marbles remains the same, leading to a higher ratio of marbles to the total mixture. Consequently, the relative abundance of marbles becomes more pronounced as the sand decreases.
What happens to the chemical properties of a substance when it becomes part if a mixture?
Depends of course of what substances the mixture contains. Depending of the substances in a solution or mixture as you typed, the properties of each one or all of them may be altered when heated up, or when those substances do not combine chemically each other.
IronIII reacts with thiocyanate to form a red complex formula. what change we will observe if we add a solution containing ironIII to this mixture?
When a solution containing iron(III) is added to the mixture, the red complex formed with thiocyanate will likely become lighter in color or change to a different color due to the formation of a new complex involving iron(III). This change is a result of a chemical reaction between iron(III) and the components of the existing complex.
Which of the following is a physical change?
Forming a mixture
How do you change a percent into a degree?
you change the percent to a decimal and then multiply it by 360
Percent of change if 56 is decreased to 14?
The percent of change is -75%
If 120 is decreased to 90 what is the percent change?
The percent of change -25%
How do you change three percent to a decimal?
You change three percent to a decimal.
What is the percent of change from 280 to 126?
what percent of change : from 280 to 126
Can amount of each substance in a mixture cannot change?
The amount of each substance in a mixture can change if more of a substance is added or removed, causing the proportions of the substances in the mixture to change. However, the total amount of each substance in the mixture will remain constant.
