Which element is needed and absorbed normally by your body when you are breathing?

Q: Why is soap solution a better cleansing agent than ordinary water?

A: Water although a good general solvent, has a high surface tension. This makes the water molecules to…

Q: What is the ancient name of silver to which its symbol was delivered

A: The ancient name of silver is which its symbol was delivered is "argentum" meaning "silver". Silver…

Q: Boston pizza franchises must pay royalties on all sales, and they must commit to renovating their…

A: Given: Boston pizza franchises must pay royalties on all sales, and they must commit to renovating…

Q: Why is half frozen fruit punch always sweeter than completely melted fruit punch?

A: The sweetness depends on the concentration of the sugar.One of the main constituents of fruit is…

Q: What is the net charge (in C) of a single O2- ion?

A: Given data The given ion is O2-   From the given charge, the number of extra electrons is, n=2 The…

Q: What is a compound? Give three exampes?

A: Step 1A compound is a substance made up of two or more element.

Q: An electrolysis is a nonspontaneous redox reaction producing –E0cell. True or false

A: Electrolysis is a phenomenon in which electrical energy drives the non spontaneous processes to…

Q: Discuss electrolytes and nonelectrolytes in a solution.

A:

Q: Given a hot cup of coffee, and a warm cup of coffee, which can dissolve more sugar?

A: A sugar is added into a hot cup of coffee, and a warm cup of coffee,

Q: Which organ, from the list below, has the highest absorption of X-rays? O Bones *

A: 1) We need to answer which of the organ haa the highest absorption of X-rays. 2) We need to answer…

Q: How would you measure the density of rock candy, which is irregularly shaped and water soluble?

A: As we know that the density can be calculated as, Density=massvolume

Q: When people sleep, their metabolic rate is about 2.6 × 10-*C/(s-kg). How many Calories does an 81-kg…

A: Write the expression for the energy. Here, rm represents the metabolic rate, m represents the mass,…

Q: Discuss Exothermic and endothermic reactions

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Q: Distinguish the same chemical characteristics but have different physical properties?

A: Required : Which have the same chemical characteristics but difference physical properties.

Q: Clase1 ICase 2 Case 3

A: The normal force is the force which always acts perpendicular to the surface.

Q: adioactive substance has a half life of 30 minutes. How much of a sample of this substance will not…

A: Given, No = 100%= 1 T= 30min t= 2.5 hours = 150 min We know that, N= No (1/2)t/T

Q: How many grams is 3.2 mol of N2? Round your answer to the nearest whole number.

A: Molar mass of N2  = 2 * Atomic mass of N = 2 * 14 g/mol  = 28 g/mol

Q: Is blood homogeneous or heterogeneous? A) Homogeneous B) Heterogeneous C) Both A & B D) None of…

A: We have to answer whether blood is homogeneous or heterogeneous?

Q: how many atoms of each element is in the molecule 4SrO^-2

A: In stoichiometry of chemical compounds, any number written on the left-hand side with a symbol of an…

Q: Which are more prominent in the food we eat, carbon-12 or carbon-14?

A: In our body the ratio of carbon C-14 to C-12 is 1/100 billion.  The isotope C-14 makes up not more…

Q: An irregularly shaped piece of metal of density 7.8g/cm^3 weighs 429 grams when completely immersed…

A: Given data m=429 gmρ=7.8 gm/cm3

Q: write the balanced chemical equation for P+O2=P2O5

A: 2P+52O2 = P2 O5…

Q: NB NA B A W. W B

A: According to Newton's third law of motion, for every action, there is an equal and opposite…

Q: The half-life of lodine-131 is 8.0 days. 100 mg of lodine is given to a patient to treat…

A: Using the equation below, we can determine how much of the original isotope remains after a certain…

Q: Activity 2.1 Intermolecular Forces present among species Identify the intermolecular forces present…

A: There are four types of bonds: ionic bonding van der Waals dispersion forces hydrogen bonding van…

Q: What are the five most common elements in living things?

A: Living things are composed of several elements, but there are certain elements which form the basic…

Q: Oxygen is released in this process. O Light Reaction Calvin Cycle O Both Light Reaction and Calvin…

A: Oxygen is released both light and Calvin cycle process

Q: how many grams are in 2.70 x 10^24 molecules of P^4

A:

Q: Discuss how surfactants remove dirt, oil, or stain.

A: The answer is below

Q: Camphor particles do not dance about in water contaminated with oil, Why?

A: Introduction: Surface tension:  It is the shrinking tendency of the liquid surfaces into the minimum…

Q: How do we detect the smell of an incense stick?

A: The particles of hot (after lighting it) incense stick possess large kinetic energy and diffuse in…

Q: 10g of K2SO4 is dissolved into 1000g of water. The freezing point of the solution is -.0.29 degrees…

A: Van't Hoff factor (i) is the measure of degrees of dissociation/association of a compound. i =…

Q: Isra is analyzing the properties of several samples of elements to find out which sample is a…

A: