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Tag Archives: substance

When a pregnant woman ingests substances, the interaction of one substance with another often ______ the effects of one or both?

IncreasesIn women that are pregnant, the effects of substances are far more adverse than they would be in a normal person, especially if the woman is taking more than one. For this reason, it is important for pregnant women to take as much care as possible of their bodies and …

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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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Like many forms of substance abuse, alcoholism develops through stages. Which of the following stages is the most advanced and the most difficult to recover from? abuse addiction dependenceLike many forms of substance abuse, alcoholism develops through stages. Which of the following stages is the most advanced and the most difficult to recover from? A. abuse B. addiction C. dependence

Like many forms of substance abuse, alcoholism develops through stages. Which of the following stages is the most advanced and the most difficult to recover from? abuse addiction dependenceLike many forms of substance abuse, alcoholism develops through stages. Which of the following stages is the most advanced and the most …

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The chemical formula of lithium carbonate is Li2CO3. Which statement below best describes the types and number of atoms of each element making up this substance? A. Two lithium atoms; one calcium atom; one oxygen atom B. One lithium atom; three carbon atoms; three oxygen atoms C. One lithium atom; one carbon atom D. Two lithium atoms; one carbon atom; three oxygen atoms

The chemical formula of lithium carbonate is Li2CO3. Which statement below best describes the types and number of atoms of each element making up this substance? A. Two lithium atoms; one calcium atom; one oxygen atom B. One lithium atom; three carbon atoms; three oxygen atoms C. One lithium atom; …

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________________ are the body’s adverse reaction to introducing an excessive amount of a toxic substance into the system.

Hangover Hangover is unpleasant psychological and physiological effect experienced after consumption of alcohol such as distilled spirit and wine. Hangover usually developed after 6-8 hours and last or 24 hours. Furthermore, hangover, symptoms are related to blood alcohol concentration which is the amount of alcohol present in a person’s blood.

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In the carbon cycle, decomposition is the breakdown of a substance into simpler substances. What is the name for the process of the nitrogen cycle that produces ammonia?

In the carbon cycle, decomposition is the breakdown of a substance into simpler substances. What is the name for the process of the nitrogen cycle that produces ammonia?

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Why is water an excellent solvent for most ionic compounds and polar covalent molecules but not for non-polar compounds? A) Water is a polar molecule. B) Water has a charge like an ion. C) Water is a deionizing substance. D) Water molecules have an unusually high kinetic energy in the liquid state.

A)Water is a polar molecule. When talking about solubility, the rule that “like dissolves like” is usually correct. This means that polar substances are soluble in other polar substances. This occurs because the opposite partially charged ends of different polar molecules are attracted to each other. Similarly, the partially charged ends …

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In 1987 the first substance to act as a superconductor at a temperature above that of liquid nitrogen (77 k) was discovered. the approximate formula of this substance is yba2cu3o7. calculate the percent composition by mass of this material.

  The molar mass of the elements are: Yttrium (Y) = 88.91 g / mol Barium (Ba) = 137.33 g / mol Copper (Cu) = 63.55 g / mol Oxygen (O) = 16 g / mol   Calculating for the molar mass of YBa2Cu3O7: YBa2Cu3O7 = 88.91 + 2(137.33) + …

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A substance that heats up relatively quickly has a

Answer: The correct sequence according to the question is steps- 4→1→3→5→6→2→7. Explanation: The given steps show that how the rocks are recycled from one form to another form due to certain factors like weathering over geological time scale which was explained by James Hutton and he termed this concept as …

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An unknown substance has a mass of 56.8 g and a volume of 23.4 ml. what is the density of this unknown substance?

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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An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide. if the mass is 21.3 g, what is this substances density (in grams per milliliter)?

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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Lymph nodes produce what substance that assists in immunity from disease?

The right answer is Transgenic organisms can produce a desired product that may benefit other organisms. A transgenic organism contains DNA combining  stably integrated in all its cells. In other words, the organism, be it a plant, an animal or a microorganism, has a new piece of DNA embedded in …

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In order to observe a ______ property of a substance, the substance must interact with another substance , such as when gasoline burns or when sodium metal reacts with water

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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As a substance changes phase from a gas to liquid to solid: A- The spacing between molecules increases. B- It's density generally increases. C- The spacing between molecules is not affected. D- It undergoes chemical change.

As a substance changes phase from a gas to liquid to solid: A- The spacing between molecules increases. B- It’s density generally increases. C- The spacing between molecules is not affected. D- It undergoes chemical change.

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At which point could the substance shown exist as a gas or a solid but not a liquid?

Answer: The correct answer is all of these. Explanation: Organic compounds are defined as the chemical compounds where one or more carbon atoms are covalently bonded to other atoms of hydrogen, oxygen or nitrogen. They occur naturally in nature and the main sources of these organic compounds are petroleum, coal …

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Iodine-123 is a radioactive substance used in medicine. It has a half-life of 13 hours. A nurse received a solution that initially contained 48 grams of iodine-123. Now only 12 grams of the iodine-123 remain. How many hours have passed since the nurse received the solution?

Answer:                 The point that lie on the line is:                         B.  (1,1) Step-by-step explanation: We are given that a line passes through the point (0,-1) and has a slope of 2. …

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Light waves will bend when passing from one transparent substance to another unless:

Answer: a) The time the police officer required to reach the motorist was 15 s. b) The speed of the officer at the moment she overtakes the motorist is 30 m/s c) The total distance traveled by the officer was 225 m. Explanation: The equations for the position and velocity …

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