Multiple Choice: One of the following substances is toxic as additives in the pool --- if it is too much--- for the purpose of hygiene and sanitation:  a. calcium elements b. calcium cations c. chloride ions d. chlorine gas

Q: COLUMN A COLUMN B b. Teflon 4. Used as coating material for kitchen cooking wares d. Ascorbic acid…

A: We use a coating on all cooking wares to be safe.

Q: a common preservative used in hematology and blood bank

A: Different types of preservatives are used as per the laboratory requirement. Preservatives used in…

Q: FeClz is highly corrosive and is irritating to skin and eyes. Which waste container should sol…

A: FeCl3 is a highly corrosive. FeCl3 is very acidic and we used basic container to put in.

Q: What are preservatives?

A:

Q: events in thế universe. It compost for new plants. How are they related to our daily living? Why are…

A:

Q: How many grams of bicarbonate will produce 40. mL of CO2 gas?

A: The reaction for the production of bicarbonate can be written as follows, CO2 (g) = CO2 (aq) + H2O…

Q: Write about lead and its effect on humans

A: Lead (Pb) is a heavy, soft, bluish metal, and occurs in nature in the formof ores. Once Pb is mined,…

Q: Aqua is usually the number one ingredient in most products. It has a more common, everyday name and…

A: Given, Aqua is one of the key ingredient in many products. What is its common and everyday name?…

Q: If limestone is interacted with an acid, it liberates a gas made from:  a. water vapor b. methane…

A: The substance obtained from the rocks, caves as sediment with the combination of minerals, such as…

Q: akeCovalentActivity.do?locator%3Dassignment-take mail YouTube Maps E Attendance March. M…

A: According to the question,  Mass of sample = 7.478 grams Molar mass of organic compound= 136.2 g/mol…

Q: so, (sulfate) NO, (nitrate) co, (carbonate) Chemical How many S0, ? Chemical How many NO, ? Chemical…

A:

Q: Why do we need to remove impurities from compounds before we use them?

A: The importance of removing impurities from compounds is given below,

Q: How much ppm will replace 200kg/ha of Ca++? * a.) 100 b.) 40 c.) 20 d.) 0.2

A:

Q: Take about 5 ml of dil. HCl in a test tube and add a few pieces of fine granules to it.Which gas is…

A: If the metal granules are added into the acid, metal reduces the hydrogen to H2 and MCl (in case of…

Q: QUESTION 1 Why do most living organisms have an enzyme to decompose hydrogen peroxide? O Because…

A: Catalase is a common enzyme found in nearly all living organisms exposed to oxygen (such as…

Q: 5. Before Janet leaves the doctor, she is informed that she needs to pay closer attention to her…

A:

Q: Mass of one a mu) Carbon Type 1                             12.0 Carbon Type 2…

A: Isotopes are variants of a particular chemical element which differ in neutron number, and…

Q: Part A Find the number of ibuprofen molecules in a tablet containing 155.0 mg of ibuprofen (C13 H18…

A: Given , Mass of ibuprofen = 155.0 mg = 0.155 g And , Standard value, Molar mass of ibuprofen =…

Q: GENERAL CHEMISTRY 2 (STEM Fay M. Lafable GI Name: Clyme lified True or False Cons: Write CHEMISTRY…

A: The third postulate of KMT is-

Q: What is the number of moles in Serotonin if the mass in grams is 21.29

A: Given, mass of serotonin= 21.29 g  molar mass of serotonin =176.215 g mol-1  moles of serotonin = ?

Q: After reading the text in What's now, Let us see how far you have learned this topiC. Activity 1.2:…

A:

Q: A student dissolves 68g of compound Q in one liter of hot water. All of compound Q dissloves. The…

A: 68 g of compound Q is dissolved completely in 1 L of hot water. At room temperature mass of compound…

Q: ab. Reporting Proper Tools Add-ons Help Accessibility Last edit was seconds ago HE estions: Ow do…

A: As per guideline, Since you have posted a question with multiple sub-parts, we have solved the first…

Q: The LD50 of KCN for a 75kg person is 375mg. If this amount of KCN was put into a single cup (275mL)…

A: Given:The median lethal dose of the of potassium cyanide is 375mg for 75kg person.Volume of a single…

Q: Discuss the use of chemical preservatives in food.

A: The substances which are added in to foods, beverages, biological samples, drugs and many other…

Q: Use this diagram to answer the following questions. 7 Model The reactants in the above reaction are…

A:

Q: A student is recrystallizing 2.034 g of acetylsalicylic acid (aspirin) that was isolated from 8.00…

A: The original mass of aspirin is = 2.034 g The mass of seed crystal is = 0.389 g The mass of…

Q: What happens when you drop a chunk of diswashing paste on water? What will happen to both substance?

A: Dishwashing paste contains different type of surfactants. When this dishwashing paste added with…

Q: Question 26 A flexible outer coating of paint that protects against the elements. What kind of pain…

A: Introduction: Prevention of corrosion is very important because enormous damage occurs to buildings,…

Q: marshes of _______. The oil is extracted from the _______. Choose one answer. a. Australia, leaves…

A: Tea tree oil is an essential oil which is obtained by steam distillation method .

Q: 2. Still sleepy from a late night studying, you take the milk out of the refrigerator and pour it on…

A: Coagulation of spoiled milk due to bacterial growth can be explained as below:

Q: How do stalactites and stalagmites are formed in various caves?

A: Speleothems, also known as formations or decorations, seem to be cave features that are created by…

Q: PART 4- LABORATORY SAFETY QUESTION 1. In what situations should safety goggles be worm? 2 Why aren't…

A:

Q: Separation of a mixture of sand, NaCl and CaCO3 Part 3 (Values from this part may be used on parts…

A: Given that:Mass of evaporating dish and sand = 8.32 gMass of evaporating dish = 7.14 g To calculate:…

Q: The amount of magnesium ion in milliequivalents per litter, if you know that lab reports indicate…

A: Amount of magnesium ion in milliequivalent per litre   means millimoles per litre = mmol/L

Q: Three examples of where the nitrogen can be found in the real world.

A: Nitrogen is gas in nature.

Q: In lab, a student was given a hydrated version of NiCl2 as the unknown. The initial mass of the…

A: During heating mass of the sample reduces due to loss of water. So, 0.458 g of sample remaining…

Q: Why is part D only 0.2mol? Why can't 0.4mol be made?

A: No that is wrong explanation as I have cross checked it many a times but found that it should form…

Q: Why plasma is rare on earth? Not less than 10 sentences.

A: Matter can be defined as any substance that have fixed volume and shape. Mainly there are three…

Q: Calcium ions contribute to the hardness of water.  a) Based on the Ksp experiment, describe a way to…

A: Minerals of ions makes water hardness, Calcium and magnesium ions are the major reason for the…

Q: (d) number of C atoms. Show your work. (c) number of O atoms. Show your work. (f) Add up the number…

A: Please find the below attachments.

Q: QUESTION 3 (a) Look very carefully at the pictures below: Picture 1 and Picture 2. What does each of…

A: " Since there are multiple questions, iam solving the first question only .please repost remaining…

Q: 6. Explain the reason why a laboratory analyst should not return excess or unused chemicals back in…

A: 6) Answer - According to the question - The reason why a laboratory analyst should not return excess…

Q: Name the following Fe(NO3)2

A: The compound formula represents the number of atoms in a molecule or in a compound. The given…

Q: How to separate salt and sand from water using evaporation?

A:

Q: Boron is concentrated mainly in the lungs (0.34 mg), thyroid gland (0.30 mg), spleen (0.26mg), brain…

A: Given that, Amount of boron in lungs = 0.34 mg Amount of boron in thyroid gland = 0.30 mg Amount of…

Q: What is the MOST ADDICTIVE component of cigarettes --- when you will smoke or inhale it? a. tar…

A: Cigarettes are usually addictive in nature. This is due to the presence of the some components in…

Q: Heavy metals that are often found in whitening soaps and creams are…. A. cadmium B. mercury C.…

A: The heavy metal refers to any metallic chemical element that has relatively high density and is…