Lab 4 REPORT Gregory Chekerdjian

FINAL Experiment 1- January 2021_-789644623 - Saved Layout Review View Table A friend of yours went panning for gold last weekend and found a nugget that appears to be gold. With your newfound scientific prowess, you set out to determine if it is really gold. Your tests show that the nugget has a mass of 7.6 g. Immersing the nugget in water raised the volume from 7.22 mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell your friend? acer

What are replicates in Analytical Chemistry? O The component of a sample that repeats over different assays. Similar assays done to different samples A sample that contains exactly the same amount of analytes than the original sample similar samples that are analyzed at the same time and in the same way

All boxes please. Answer choices: analytical technique or purpose

8 - 14 please

Classify the substance shown in the sketch below. You can click the other tabs in the sketch to get a magnified view. Be sure you check all the boxes on the right-hand side that are correct for this substance. Note for advanced students: in some sketches the distance between particles has been exaggerated to make it easier to see each individual particle. normal substance 1000X 10,000,000X 000 classification (check all that apply) gas liquid solid element compound mixture solution pure substance homogeneous mixture heterogeneous mixture

how can i plot this data for concentration with depth?

The scientific methods is applied to natural phenomena. What is natural phenomena? Give two examples of natural phenomena and two examples that are not natural phenomena.

Name the following Fe(NO3)2

In the course of a conversation, you observe that three of your friends like horror movies. Horror movies happen to be your favorite type of movie as well. You also know that all of these friends were born in the same week that you were, even in the same year. An astrology-loving friend hypothesizes that people born in that week like horror movies more than other genres of movies. You decide to use the scientific method to test this hypothesis. Part A What should you do next? O Come up with a theory to explain why movie preference is related to birth week. O Perform experiments to test your hypothesis. O Propose several alternative hypotheses. O Refine your hypothesis. Submit Request Answer

The Covid-19 pandemic has many experts commenting on the science associated with the virus - origins, vaccines, monoclonal antibodies, masks, social distancing.  It is important to consider what the experts say, but to also evaluate their statements.  We will start with the scientific method.  I want you to outline the scientific method from what you have been taught in previous classes.  You can list steps, parts, process, short descriptions, whatever.  If not taught in previous classes, then you will make your best guess about it.

A student reacts 1.53 kg of magnesium metal with excess titanium(III) chloride solution. After the reaction was complete, the student had extracted 1.62 kg of titanium metal. From this data, calculate the percent error of this experiment.

Please answer question 3 part A

The role of science is to supply accurate and subjective information related to a crime, which would reflect or link up the event(s) that had been occurred This statement is true or false?

Please help me complete question 1,2,and 3

I'm resending this question because the image on the last one was blurry. I wrote the prompt and steps and helpful conversions to figuring out the real world problem on my scratch paper, how do I solve for this problem?

1a. Throughout the experiment, what are some possible sources of error that could have led to someone recovering a significantly smaller amount of table salt (NaCl) than was originally present in the sample mixture. 1b. What are some possible sources of error that could have led to someone to appear to have recovered a significantly larger amount of sand (SiO2) than was originally present in the sample mixture.

QUESTION 17 Which of the following is most likely an example of a basic research project? O Potential development of a completely new family of chemicals in 10 to 15 years. O The development of better packaging of batteries for electric cars. O Modification of an existing chemical reaction process to make the same chemical in a less expensive fashion. O Finding a technically more efficient method to produce the same product. QUESTION 18 The original 'Back to the Future' movie showed a box of 'plutonium' marked with a radioactive symbol in under Doc Brown's bed. He used this fissionable material to create the 1.21 gigawatts needed to make his car travel through time. The energy that the car ran on was generated by O An element undergoing a chemical change O A compound undergoing a chemical change A compound undergoing a nuclear change O An element undergoing a nuclear change

This article got a huge amount of international attention. Why? What does it mean that scientists "could not replicate the findings?"

Can you please answer these and give me an explanation.

2. Why is performing multiple trials of an experiment a best practice in science? Ω x² X2

Answer the table and questions.

The study of detecting small quantities of substances in samples would most likely be performed by a chemist in the branch of chemistry known as ___ . organic chemistry biochemistry inorganic chemistry analytical chemistry physical chemistry

Suppose your instructor places a can of regular and diet cola in a large container filled with water. What might you expect happen based on the results of this experiment?

1a. Throughout the experiment, what are some possible sources of error that could have led to someone recovering a significantly smaller amount of table salt (NaCI) than was originally present in the sample mixture. 16. What are some possible sources of error that could have led to someone to appear to have recovered a significantly larger amount of sand (SiO2) than was originally present in the sample mixture.