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An 8.65-g sample of an unknown group 2a metal hydroxide is dissolved in 85.0 ml of water. an acid-base indicator is added and the resulting solution is titrated with 2.50 m hcl(aq) solution. the indicator changes color signaling that the equivalence point has been reached after 56.9 ml of the hydrochloric acid solution has been added.

Answer; The molar mass of metal hydroxide = 121.66 g/ mole The formula is Sr(OH)2 Explanation; M(OH)2 + 2 HCl = MCl2 + 2 H2O   Moles of the acid = 2.5 x 56.9 / 1000 = 0.14225   Therefore; moles of hydroxide at the eq point = 0.0711 moles …

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Which of the following would be considered a solution ? A salt in the sugar bowl B sugar added to water C oil added to water D any fat-soluble substance mixed with water soluble substance

Which of the following would be considered a solution ? A salt in the sugar bowl B sugar added to water C oil added to water D any fat-soluble substance mixed with water soluble substance

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What volume 12.6 M HCL must be added to enough water to prepare 5.00 litters of 3.00 M HCL?

To solve this problem, we shall use the role;M1V1 = M2V2M1: is the molarity of the solution before dilution.V1: is the volume of the solution that we need to dilute.M2: is the molarity of the solution after dilution.V2: is the volume of the solution after dilution. By substitution;12*V1 = 3*5V1 …

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Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 400 liters in the pond to start. Let W represent the total amount of water in the pond (in liters), and let T represent the total number of minutes that water has been added. Write an equation relating W to T . Then use this equation to find the total amount of water after 14 minutes. Equation: Total amount of water after 14 minutes: liters

Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 400 liters in the pond to start. Let W represent the total amount of water in the pond (in liters), and let T represent …

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Lara made some chocolate tarts. For every 5 cups of chocolate chips. She added 3 cups of sugar. The ratio of chocolate chips to sugar in Lara's chocolate tarts is

Lara made some chocolate tarts. For every 5 cups of chocolate chips. She added 3 cups of sugar. The ratio of chocolate chips to sugar in Lara’s chocolate tarts is

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H2SO4 is added to a large beaker of water. How is the solution different from the original water?

Answer: The new solution is a homogeneous mixture and will have a lower pH i.e. more acidic. Explanation: The solution is different is different in 2 ways: 1) The original water is a pure solution. Water is a polar solvent and so is H2SO4. When the later is added to …

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A gas is located inside a closed container. if the gas is allowed to occupy more volume inside the container, what will happen to the pressure? (note: there is no gas added to the container.)

A gas is located inside a closed container. if the gas is allowed to occupy more volume inside the container, what will happen to the pressure? (note: there is no gas added to the container.)

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_____ must be added to grains during the enrichment process.

Answered by answersmine AT 22/10/2019 – 04:46 AM Iron must be added to grains during the enrichment process. In the group of grains belong the following products: white flour, de-germed cornmeal, white bread, and white rice. After processing these products are enriched with iron and certain B vitamins (thiamin, riboflavin, niacin, folic acid). …

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What element would you get if three protons were added to Lithium?

25) Answer is: less metallic and more nonmetallic. Electronegativity increases from left to right across a period, atoms have tendency to attract electrons. Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons. 26) Answer is: radioisotope. Radioisotope has an unstable …

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What number should be added to both sides of the equation to complete the square ? x2 + 12x = 11

Answer: 5 in 0.05 is 10 times greater than 5 in 0.005. Step-by-step explanation: To find : In which number does the digit 5 have greater value 0.05 or 0.005 how many times as great is it and how do you know ? Solution : According to the place value …

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Which option explains why the bill of rights was added to the U.S Constitution

1. We are all free and equal. We are all born free. We all have our own thoughts and ideas. We should all be treated in the same way. 2. Don’t discriminate. These rights belong to everybody, whatever our differences. 3. The right to life. We all have the right to life, and to …

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Which option explains why the bill of rights was added to the U.S Constitution

1. We are all free and equal. We are all born free. We all have our own thoughts and ideas. We should all be treated in the same way. 2. Don’t discriminate. These rights belong to everybody, whatever our differences. 3. The right to life. We all have the right to life, and to …

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Imagine tossing a coin: What are your chances for tossing a head? What are your chances for tossing a tail? A coin is tossed 10 times: How many times do you expect to get heads? How many times do you expect to get tails? Using this data for the 10 coin tosses, calculate and record the deviation observed from what you expected using the following formula: The more the experimental results deviate from the expected results, the more the deviation value will approach the value of 1.0. As your results get closer to the expected results, the deviation is smaller and nears the value of 0.0. Interpret the meaning of the deviation value you obtained. A coin is tossed 100 times: How many times do you expect to get heads? How many times do you expect to get tails? Using this data for 100 coin tosses: Calculate the deviation for the 100 tosses. The 100 coin tosses are repeated. The results are added to the results of the first 100 coin tosses. How many times do you expect to get heads out of the 200 tosses? How many times do you expect to get tails out of the 200 tosses? Using this data for the 200 coin tosses: What is the deviation for the 200 tosses? How does increasing the total number of coin tosses from 10 to 100 affect the deviation? How does increasing the total number of tosses from 100 to 200 (or more) affect the deviation? What two important probability principles were established in this exercise? With two coins, both coins are tossed 100 times. How many times do you expect to get 2 heads? How many times do you expect to get 2 tails? How many times do you expect to get one head and one tail? The percent of occurrence is the obtained results divided by the total tosses and multiplied by 100. Using this data for the two coins being tossed 100 times. Calculate the percent occurrence for each combination: What is the percent of occurrence for two heads? What is the percent of occurrence for two tails? What is the percent of occurrence for one head and one tail?

Answer: The correct answer is a. Amy: wildlife in or near water = turtles, crayfish, goldfish non-water wildlife = fox, deer, bobcat. Explanation: According to the question students were asked to contrast their observations based on the location so according to the location, animals should be differentiated into water animals …

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In the reaction fecl2 + 2naoh fe(oh)2(s) + 2nacl, if 6 moles of fecl2 are added to 6 moles of naoh, how many moles of fecl2 would be used up in the reaction?

Answer: The coefficient of CO₂ is 5. Explanation:     Balancing the reaction: ___C₅H₁₂ + ___O₂ → ___CO₂ + ___H₂O There are 5 C in the left side, so we put 5 on the right side: ___C₅H₁₂ + ___O₂ →  5CO₂ + ___H₂O There are 12 H in the left …

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The sum of the numerator and denominator of a fraction expressed in simplest form is 17. if 3 is added to the numerator, the value of the fraction will be 1. what is the fraction?

The basis to respond this question are: 1) Perpedicular lines form a 90° angle between them. 2) The product of the slopes of two any perpendicular lines is – 1. So, from that basic knowledge you can analyze each option: a.Lines s and t have slopes that are opposite reciprocals. …

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A pharmacy technician added 10 ml of a 20% (w/v) solution of potassium chloride to a 500 ml bag of normal saline. what is the percentage strength of potassium chloride in the bag? round to the nearest hundreth. do not enter the percentage sign in your answer; enter only the number

This problem is to apply Roult’s Law. Roult’s Law states that the vapor pressure, p, of a solution of a non-volatile solute is equal to the vapor pressure of the pure solvent, Po solv, times the mole fraction of the solvent, Xsolv p = Xsolv * Po sol X solv …

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Instructions:Select the correct answer. Why does a solid change to liquid when heat is added? A-The spacing between particles decreases. B-Particles lose energy. C-The spacing between particles increases. D-The temperature decreases.

There are two systems in the human body that are responsible for the coordination between the functions of different systems to achieve the unity of the living organism’s body. These two systems are the nervous system and the endocrine system. The action of the nervous system is fast and takes …

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Which of the following numbers must be added to complete the square in the equation below? x²+18x= -27 A. 18 B. 9 C. 54 D. 81

Answer:  The correct option is (C). 10 = square root of the quantity of x minus 8 all squared plus y minus 9 all squared Step-by-step explanation:  Given that the segment AB has point A located at (8, 9). The distance from A to B is 10 units. We are …

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An automobile’s radiator has a capacity of fifteen quarts, and it currently contains twelve quarts of a thirty percent antifreeze solution. How many quarts of pure antifreeze must be added to strengthen the solution to forty percent? 2 quarts 3 quarts 4 quarts

Answer: Option C – BD=76 cm Step-by-step explanation: Given : You are designing a diamond-shaped kite. you know that AD = 44.8 cm, DC = 72 cm, and AC = 84.8 cm. To find : How long BD should it be? Solution : First we draw a rough diagram. The …

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What is the total amount in an account that has had $35 per month added into it for 30 years and grew with an annual interest rate of 7%?

You need to determine the number of ways in which 30 competitors from 50 can qualify. First, you have to realize that the order is irrelevant, that is: it is the same competitor_1, competitor _2, competitor _3 than competitor_3, competitor_2, competitor_1, or any combination of those three competitors. So, the …

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Which number produces an irrational number when added to 0.5 a. 0.555… b. square root of 3 c 1/3 d. square root of 16

Answer:  The correct option is (C). 10 = square root of the quantity of x minus 8 all squared plus y minus 9 all squared Step-by-step explanation:  Given that the segment AB has point A located at (8, 9). The distance from A to B is 10 units. We are …

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10g of an unknown compound are added to water to form a 7.89 molar solution. if 2 liters of solution are present, what is the molar mass of the unknown compound?

This problem is to apply Roult’s Law. Roult’s Law states that the vapor pressure, p, of a solution of a non-volatile solute is equal to the vapor pressure of the pure solvent, Po solv, times the mole fraction of the solvent, Xsolv p = Xsolv * Po sol X solv …

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[06.01]the same amount of heat is added to 100 g of water and 1 kg of water starting at the same temperature. what will happen?

The equation for how temperature changes the resistance R is:  R=R₀(1+α(T-T₀)), where R₀ is the resistance at T₀=20°C, T is the temperature for which we want to calculate the resistance and α is the temperature coefficient for resistance.  The resistance of the copper wire increases by 18% or by 0.18, so the …

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If nickel is added to copper sulfate solution, the nickel will replace the copper. write the balanced equation

Explanation : In the net ionic equations, we are not include the spectator ions in the equations. Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides. (a) The given balanced ionic equation is, …

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