please help with this question : The research process in which new data will be collected and statistically analyzed is called a    primary study   secondary study   tertiary study   cross sectional study

Q: A student measures the mass of a piece of aluminum, and finds it to be 8.945 g. She finds that the…

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Q: The average mass of a female adult brain is 1.198 kg. Convert this mass to cg.

A: Introduction :  We have to convert kg to cg.

Q: Many processes occur in the digestive system. Which process is best classified as a physical change?…

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Q: 29. A sample of air was collected near a busy street in LA county. The air sample contained PM2.5…

A: Given: Mass of particle = 6.0 × 10-5 μg Measurements of container: length= 3.0 × 10-2 mwidth = 1.0 ×…

Q: The graph shows the results of an experiment where a temperature probe was placed in a beaker of…

A: y = -1.02x + 41.3   y = temperature  x = time   Value of temperature at time = 6 min

Q: For each trial (data in Tables 3 – 5) graph the volume of water displaced (in mL) on the x-axis…

A: The graph given shows the amount of water that is displaced with respect to time. The slope of any…

Q: Employ the method of dimensional analysis to convert 1 cubic yard to tonnes of water. Assume a…

A: Using dimensional analysis method the given 1 cubic yard is converted into to tonnes of water as…

Q: Density of substance can be express in which of the following units? 1.cm^3 2. g/cm^3 3. ML 4.…

A: Density (d) :-  Density of a substance is defined as the ratio of mass of the substance to the…

Q: Which of the following represent a chemical change? Which of the following represents a physical…

A: We are to discuss which of gives changes are physical and chemical changes.

Q: The average density of blood is 1.060 kg/L. The average human body contains 5.00 L of blood. What is…

A: average density of blood = 1.060 kg/Laverage volume of blood = 5.00 Laverage mass of blood = ?

Q: Write “physical change” or “chemical change” next to the following statements. Burning of gasoline…

A: The change in the form of a substance without changing its identity is called as physical change. A…

Q: Food safety guidelines recommend that a beef rib roast (bone-in) should cook for 23.0 minutes per…

A: beef rib roast (bone-in) should cook for 23.0 minutes per pound based on a 325 °F oven setting…

Q: 1. Mixtures are separated by taking advantage of differences in their physical properties. Based on…

A: Mixtures of iron, sand and salt are separated by taking advantage of differences in their physical…

Q: A certain data set has low accuracy, but high precision. Which of the following statements about…

A: There is very little random and systematic error. Because random error causes one measurement to…

Q: Which of the following represents a chemical change? O mixing salt and sand O paper burning O…

A: Chemical change : a chemical change always results into one or more new substances i.e substances…

Q: Which of these expresses the conversion rate from Fahrenheit to Celsius? O °C] = [K] – 273.15 O K] =…

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Q: The mass unit associated with density is usually grams. If the volume (in mL or cm) is multiplied by…

A: Volume and density of marshmallow are given whose mass is to be determined in grams.

Q: Please answer question number 2  correctly with the correct answer. there is a picture of an example…

A: we have given that  moles of  oxygen (O2) gas =  1 mole   the molar mass of 02 gas =  32 gram/mole…

Q: A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the…

A: Given : Mass of unknown liquid = 1.08 kg  Volume of unknown liquid = 1530 cm3 To find : Density…

Q: tems that are purchased in large quantities are often grouped for convenience and ease of counting.…

A: There are many words used for convenience instead of numbers like century(means 100) ,decade ( means…

Q: 5. Calculate the mass of aluminum that occupies the same volume as 95.7 g of cobalt. The density of…

A: From the given mass of 95.7 g of cobalt, the volume occupied by it is calculated.  Then, mass of…

Q: The chemist measures the volume of the unknown liquid as 1.337 L and the mass of the unknown liquid…

A: The objective of the question is to calculate the density of an unknown liquid and then identify the…

Q: You are given the masses, in grams (g), and the volumes, in cubic centimeters (cm°), for a series of…

A: Density is obtained as mass per unit volume. Given that, Mass of NaCl = 43 g, volume = 20cm3 Mass of…

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: I don't know where to start. I found the average.

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Q: Consider the tabulated data collected by a student for an unknown metal sample. Use this data to…

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Q: Question 4: How many moles is 3.52 x 10^24 molecular water?

A: Number of mole = number of molecules/(6.023 X 1023 molecule per mole)

Q: It is often necessary to do calculations using scientific notation when working chemistry problems.…

A: Rules for determining the number of significant figures in an answer :The result of multiplication…

Q: A piece of metal with a mass of 114 g was placed into a graduated cylinder that contained 25.00 mL…

A: One question at a time!! ANSWER: 1. The volume of metal = Final volume - Initial volume = 42.5mL -…

Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.