The electromagnetic waves described as both beneficial and detrimental to human health are _____ waves.


Answer 1

The answer is X- rays. The benefit of X rays is their use in medical imaging. This is because of their property to penetrate some matter, such as tissues, differentially. This property is significant in disease diagnosis. However, X rays are detrimental to the human health, especially in above-recommended doses. The high energy of X rays can damage DNA in cells and cause mutations that lead to cancer.

Answer 2
Answer: I'm not positive but I'm pretty sure its Light waves.

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The geometry for boron atom in F3B-NH3 is... A) trigonal pyramidal
B) tetrahedral
C) trigonal bipyramidal
D) bent


Boron is bonded to four different atoms, the most stable configuration, and the only configuration that it can have is tetrahedral.

Find the number of moles of argon in 364g of argon.


Answer : The number of moles of argon in 364 g of argon is, 9.1 moles

Solution : Given,

Given mass of argon = 364 g

Molar mass of argon = 40 g/mole

Formula used for determining the number of moles :

Now put all the given values in this formula, we get the number of moles of argon.

Therefore, the number of moles of argon in 364 g of argon is, 9.1 moles


Which of these is the BEST explanation for why banks loan money to individuals?A) The bank would like to earn a profit by charging interest.
B) The government requires that banks give money to applicants.
C) The bank would like to take a risk and support an entrepreneur.
D) The bank would like to borrow money from the Federal Reserve System.


The first alternative is correct (A).

The act of borrowing amounts to risks. The main risk that bank suffers is the risk of default on the part of the borrower of the loan. In addition, the bank has operating costs for servicing and conducting loan operations.

In this way, the esimulo that the banks have to lend are the interest charged, that is, the obtaining of advantages in the form of profit. Such interest must cover operating costs and risk exposure for a bank to lend money.

A. the bank would like to earn a profit by charging interest.

A liquid fuel mixture contains 30.35% hexane (c6h14), 15.85% heptane (c7h16), and the rest octane (c8h18). what maximum mass of carbon dioxide is produced


To answer this item, the carbon dioxide produced can be determined by determining first the mass of carbon available for the reaction. Let our basis be 100g of fuel mixture.

carbon in hexane = (100 g)(0.3035)(6*12/6*12 + 14) = 25.41
carbon in heptane = (100 g)(0.1585)(7*12/7*12+16) = 13.31
carbon in octane = (100 g)(0.538)(8*12/8*12+18) = 45.3

The mass of carbon is 84.02. Each 12 g of carbon is present in 44 g of carbon dioxide. 

     (84.02 g carbon) x (44 g of carbon dioxide/ 12 g of carbon) 
   = 308.07 carbon dioxide/100 g of mixture

Answer: 308.07 g carbon dioxide / 100 g of mixture
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