Which of the following is a good hypothesis when someone observes that it is snowing lightly in the morning?     Snow is made of ice crystals.     Snow is cold.     I hope school will close because I have an exam.     School will not close because of the snow.

Q: One important observation that supporters of the phlogiston theory had trouble explaining was that…

A: Lavoisier, a French chemist, conducted an experiment in which he decomposed the mercury calx into…

Q: a. Give the normal state (solid, liquid or gas) of each of the following i. Isopropyl alcohol ii.…

A:

Q: Question 9

A: An intensive property can be defined as the bulk property or a physical property of a given system…

Q: 1.If the temperature is 20. °C, what is the corresponding temperature on the Fahrenheit scale?…

A: Physical property is the substance inherent property. To get this no need of the change in chemical…

Q: When astronomers observe distant galaxies, they can tell that most of them are moving away from one…

A:

Q: Classify each description as a hypothesis, theory, or law.-An untested explanation based upon…

A: Hypothesis is a guess or tentative explanation that has to be tested and investigated further. A…

Q: Does each of the following describes a physical or chemical change, explain why. a. the helium gas…

A: a. Physical change The helium gas tends to leak out after few hour it is a physical change. Because…

Q: Which one of the following is a pure substance? tap water гock air elemental oxygen apple

A: Pure substance is the one which contains same type of particles throughout, like an element or…

Q: Classify the following mixtures as homogeneous or heterogeneous.a. potting soilb. white winec. your…

A:

Q: Element, Pure substance or compound, mixture homogeneous or heterogeneous blood ammonium |chloride…

A: Blood : It is a mixture of many components such as RBCs, WBCs etc. These are present in different…

Q: Fact, Law, Hypothesis, or Theory? __ Table vinegar is analyzed as 4.0% by mass aqueous acetic acid.…

A: The answer is as follows:

Q: Which of the following is a good hypothesis when someone observes that the car won't start in the…

A: Hypothesis   A hypothesis is an educated assumption based on specific data that serves as a basis…

Q: n which of the following pairs of properties are both properties chemical properties? (mark all…

A: Melting point, density, physical state and smell are physical properties. Reaction with water and…

Q: What is the density of a block of metal that measures 62.88cm by 34.220cm by 5.18cm and has a mass…

A: Given is, block of metal that measures 62.88cm by 34.220cm by 5.18cm  Mass= 24,983.44 grams

Q: What is the minimum mass of hematite, Fe2O3, a iron ore, from which 3.5kg of pure iron could be…

A: It is given that 3.5 kg of pure iron is to be extracted from the ore Fe2O3. First step is to convert…

Q: Explain the important distinctions between each pairof terms: (a) mass and weight; (b) intensive and…

A: Introduction: Mass and weight is the physical property of a substance. Intensive and extensive are…

Q: 3. Which of the following are pure substances and which are mixtures? a. table sugar b. distilled…

A: Pure substance is made up of only one type of particle. It is always homogeneous in nature.Mixture…

Q: Which of the following is the least probable concerning five measurements taken in the lab? The…

A: The correct option is:

Q: Which of the following would be considered a hypothesis? O A. The Washington Monument is 555 feet…

A:

Q: Use the information from the table provided (IMAGE ATTACHED) to answer Question 1 (Part 1 AND 2).…

A: The attached image indicates how the potassium permanganate diffuses with time when the…

Q: Which of the following is a good hypothesis when someone observes there is more traffic in the…

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: 10. The following is a homogeneous mixture A. 70% isopropyl alcohol B. 100% isopropyl alcohol CES…

A:

Q: Density of Substances at Room Temperature Liquid Density (g/mL) ethanol 0.789 milk 1.033 oil EAS…

A: Given substances, Ethanol Milk Oil Water

Q: Which of the following would best be described as a pure substance? (mark all correct responses)…

A: The substances which are made up of only one kind of element or made up of two or more elements…

Q: Determine whether each of the following represents a physical property or a chemical property: (a)…

A: A physical property can be measurable without changing the identity of the substance. A chemical…

Q: A student performs an experiment to determine the density of a sugar solution. She obtains the…

A: In measurement of a set, accuracy is closeness of the measurements to a specific value, while…

Q: Indicate whether each sample of matter listed is a substance or a mixture; if it is a mixture,…

A:

Q: Classify the following as pure substances-element, pure substance-compound or mixture. Write the…

A: Answer is as follows :

Q: Which of the following is a mixture? O All are mixtures salt water O vegetable soup O blood

A: mixture is formed when two different substances are mixed and they mixed physically,  no chemical…

Q: 3) Each of the beakers depicted below contains two liquids that do not dissolve in each other. Three…

A: Each of the beakers depicted below contains two liquids that do not dissolve in each other.   (a)…

Q: Which of the following is best characterized as a scientific law?  a. The sun always rises in the…

A: Introduction A scientific law is something that has been proved to be valid by observation and…

Q: 3. Which of the following is a pure substance? a. cream of wheat b. sodium sulfate c. lemon ginger…

A: To identify the pure substance.

Q: A single 1−oz serving of tortilla chips contains 260 mg of sodium. If an individual ate the entire…

A: Given 1 oz tortilla chips contains 260 mg sodium Conversion factor: 1 oz tortilla chips = 260 mg…

Q: 1. Which of the following is NOT an example of physical property? B. Length A. Texture C. Intensity…

A:

Q: There are 12 eggs in a dozen, If a farmer's chickens produce an average of 495 dozen eggs in a…

A: Given that,  12 eggs = 1 dozen Farmer's chickens produce 495 dozens eggs on average per month…

Q: To determine the volume of a cube, a student measured one of the" dimensions of the cube several…

A: For a:

Q: 1. The student obtains 15 g of an unknown substance. 2. The student notes that at room temperature…

A: Extensive properties are the properties that depends upon the amount of matter in a sample

Q: Classify each statement as a physical property or a chemical property. If its physical property,…

A: We will answer first three subparts at a time since you have not mentioned the exact subparts that…

Q: Which of the following is a good hypothesis when someone observes that the car won't start in the…

A: Hypothesis  A hypothesis is an assumption, an idea that is proposed for the sake of argument so that…

Q: Which of the following would be considered a hypothesis?

A: Hypothesis is considered as a statement used in scientific research field  , which the researchers…

Q: urine soil pure water a Snickers TM bar Pure substance Mixture

A: Pure substances :  These are the substances that are made up of only one kind of particles and has a…

Q: 4. A satellite is launched from planet A to B. If planet A has a lower gravity than planet B what…

A:

Q: Which of the following is a good hypothesis when someone observes there is more traffic in the…

A: The appropriate hypothesis when someone observes there is more traffic in the evening between 5 and…

Q: Enter an equality for the following medication in stock: 1.8 mg of Coumadin per 1 tablet of…

A: Given →           1. 1.8 mg of Coumadin per 1 tablet of Coumadin           2.  90 mg of Clozapine…

Q: 1. Calcium, an element, is a dull, gray solid that melts at 839°C. When it is placed in water,…

A: As per the rules, only the first question can be answered:

Q: Which one of the following is a unit of mass? A) μL B) Mg C) cd D) mm2 E) in.

A: Here we have to find which of the following is a unit of mass.  We know that mass is the combined…

Q: Which one of the following is a pure substance? tap water rock air elemental oxygen apple

A: Substance which is made up of single or one type of atom or molecule is known as pure substance.…