Example 60 mice, each weighing 2 kg, were used in a lethal dose (LD50) experiment. The number of death mice versus the mass of substance A given to each mouse presented in the Figure below. 70 60 50 40 Sulistane A Substab 20 10 OS 10 15 20 2 0 35 40 Mass of Substance gven to each mouse (mg) Calculate the lethal dose (LD50) of substance A and B seperately. • Which one of the substances is more toxic? 12 Number of death mice

Q: In terms of mass, calculate the percentage of the active ingredient for each of the following…

A: Mass percentage is defined as the total mass of the substance( here active ingredients) divided by…

Q: Nor 99 Nor 99 Nor Bra Bra Homepa Homep G Am ь Му W KM O 200 В Нус O AP 15. G The G AO Q AP + A…

A:

Q: You are drying a sample of Ba3(PO4)2. After 5 minutes of drying it weighs 1.2034 g. You continue to…

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Q: eral contains 5.032 % of a precious metal, by mass. The precious metal as a density of 3.681 g/cm°.…

A: Density = 3.681 g/cm3  Mass % of metal mineral = 5.032%  Density = mass/volume

Q: Question 34

A: Mixture: Combination of two or more different materials in a way that no chemical reaction occurs.…

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Q: Question 20. In another investigation the student added 100 g of each substance to 200 g of water at…

A: A solubility curve indicates the solubility of solutes in water at different temperatures.

Q: A My Hôme OWLV2 | Online teaching and learning resource from Ce [References] The population density…

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Q: 8.55 In the process of Is the of I II? III Skill-Building in similar pairs) Student II writes: A1 +…

A: Given: A element = red atom B element = green atom

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A: The question is based on the concept of analytical chemistry. we have to explain regarding accuracy…

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A: For calculating the density of the unknown metal sample, we need its mass and volume.

Q: In an Erlenmeyer flask, 25.75 grams of potassium nitrate was dissolved thoroughly to prepare a…

A: a.)   Moles of potassium nitrate = given mass ÷ molar mass = 25.75 ÷ 101 = 0.255 (mass = density X…

Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

A: Given that : Mass of original sample = 2.5429 g Mass of filter paper = 0.5662 g Mass of paper cup =…

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A: A pure substance A is found to change upon heating into two new pure substances B and C. Substance…

Q: 6419.012 10 B 11 12 Na Mg 22.99 24.31 20 Na 10.81 12.01 14.01 16.00 19.00 20.18 13 14 15 16 17 13 Al…

A: Given : 2KI+Pb(NO3)2→PbI2+2KNO3 Mass of yellow solid produced (PbI2)=3g To Find: Mass of KI produced…

Q: . The electrolysis of water into hydrogen and oxygen is an example of ______ reaction. A.…

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Q: 3. A Chemistry 11 student tries to explain that based on the ratio of the reactants in the reaction…

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Q: is this correct, especially questions 3 and 7 on the second page. THANKS :)

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A: Answer is option B and C  CH4<PH3<H2S  HSO3-<H2SO3<H2SO4

Q: How to calculate the percent by mass of water in unknown?

A: Percent by mass is calculated by using the formula,

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A:

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A: Given: Metal wire diameter=1 mm No. of moles=1 Density of metal=17 g/cm3

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A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

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A: NOTE

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Q: In an experiment similar to Perrin's, you counted the concentration of suspended particles in a…

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Q: Question 2

A: Given information:Density of copper = 8.97 g/cm3Mass of pure copper = 1.00 kg

Q: You weigh a dry flask, and place a chunk of solid into it, then weigh it again. You then fil the…

A:

Q: 9) An experiment was done in which zinc was reacted with hydrochloric acid in a vessel to make…

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Q: 2. a) If 24.8 grams of an aqueous solution of iron(III) nitrate, Fe(NO3)3, contains 7.33 grams of…

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Q: Introduction: For this experiment, 16.55 grams of nitrogen gas and 10.15 grams of hydrogen gas are…

A: The balanced chemical equation for the reaction is given below.N2 (g) + 3 H2 (g) -------> 2 NH3…

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A: The volume of the fluid is calculated as,

Q: Some students burned magnesium in excess oxygen, as described by the equation 2 Mg(s) + O2(g) --> 2…

A:

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.