The solubility of potassium chloride is 34.2 g/100 g h2o at 20°c. a 68.4-g sample of potassium chloride is added to 200.0 g of water at 20°c. is the solution saturated, unsaturated, or supersaturated? g KCl / g H2O = 68.4 g / 200 g = 0.342 g KCl / g H2O Therefore, the solution […]
Bromine has chemical properties most similar to 1.both are in 7a group. 2.both are halogens. 3.both have 7 valance electrons. Option (1) and (2) are correct. Explanation: Elements which contain same number of valence electrons tend to show similar chemical properties. This is because having same number of valence electrons will make the atoms to
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Thallium consists of 29.5%ti-203 and 70.5%ti-205. what is the relative atomic mass of thallium? 203am This is basically a ratio math problem. We have two different masses and a known percentage of each. Combining them into a weighted-average mass is done by multiplying each mass by the weight percent and adding them up. 0.295 x
how do I find 0.74 kcal/min to cal/sec using deminsional analysis when I don’t have the conversion for kcal to cal? Inot sure what it is i sorry : (( i’m pretty sure its b i might be wrong though! The answer to your question really depends on three things: how much water you have,
Igot stuck again: why do tissues “team up” to form organs? So they can perform the body’s activities. For specialization and increased efficiency Explanation: There are different levels of organizations of organism’s body: The cell is the basic unit of living organisms. The simplest living organisms are made up of one cell each (unicellular). Complex
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The lock-and-key mechanism refers to A). The complementary shapes of an enzyme and a substrate. Explanation: The Lock-and-key mechanism was proposed by Emil Fischer for the first time and characterized as the metaphor which helps in elucidating the specificity of the enzymatic reactions. In this metaphor, the lock is described as the enzyme while ‘key’
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What is the volume of a cubic salt crystal measuring 2.44 × 10-2 m by 1.4 × 10-3 m by 8.4 × 10-3 m? V = 2.9 x 10⁻⁷ m³ hope this helps! Question 7: What is the volume of a cubic salt crystal measuring 2.44 × 10-2 m by 1.4 × 10-3 m by
Araindrop has a mass of 50. mg and the pacific ocean has a mass of 7.08 x 10^20 kg. use this information to answer the questions below. be sure your answers have the correct number of significant digits. what is the mass of 1 mole of raindrops? round your answer to 2 significant digits. how
Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points from highest to lowest. CoCl3, NH4Cl, Li2SO4 The order of increasing freezing points is Explanation: The expression of depression in freezing point is given as: where, = Depression in freezing point i = Van’t Hoff factor = freezing point constant
The dehydration of an alcohol in the presence of a strong acid yields Alkenes Explanation: Alkenes are unsaturated compounds which contains at least one carbon- carbon double bond. The dehydration reaction of alcohols results in alkene. It is carried out by heating the alcohols in the presence of a strong acid, such as H2SO4 at
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