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Gnoma [55]
3 years ago
15

A miner develops cancer of the esophagus. Ten years before, he had been exposed to radiation when he worked for a year in a mine

. He had also smoked cigarettes for a number of years, but had quit five years ago. Which statement best describes the miner’s condition?
A. Tests can determine whether the cancer was caused by exposure at the mine or by compounds in cigarette smoke so that a treatment can be determined.

B. Cancer caused by exposure at the mine would have appeared while he was at the mine, so smoking is the more likely cause.

C. The cancer is likely the result of natural exposure to radiation in the environment and not related to either the mine or smoking.

D. It is unlikely that a specific cause can be determined, but the treatment would likely be the same in either case.
Chemistry
2 answers:
sashaice [31]3 years ago
4 0

D) It is unlikely that a specific cause can be determined, but the treatment would likely be the same in either case

Salsk061 [2.6K]3 years ago
3 0

Answer:

Option (D).

Explanation:

Cancer can be defined as a progressive disease, which involves uncontrolled cell growth with ability to spread or invade other parts organs of the body. It is resulted due to a number of mutations that lead to change in genetic material and cause destruction of cell cycle regulation.

As the miner had been exposed with both radiation and tobacco, it is quite tough to determined a specific cause for his cancer. This may be due to radiation or smoke or due to other factors.

Although treatment for cancer caused by either way would be same as it will target the cancer cells and kill them by prevent their growth and division.

Thus, the correct answer is option (D).  

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The
Marat540 [252]

Answer:

Isotopes

Explanation:

Isotopes are atoms of the same element that contain an identical number of protons, but a different number of neutrons. Despite having different numbers of neutrons, isotopes of the same element have very similar physical properties.

4 0
3 years ago
Pls help me !!!! Is for chemistry
Sphinxa [80]

Answer:

Explanation:

1) Molarity of the solution is (0.50/0.75)x1 = 0.66666 Mol/L

2) Molar mass of NaCl is 23+35 = 58g

Molarity = (0.5/58)/0.075 = 0.115 Mol/L

3) Molar mass of Li_{2}SO_{4} = 7x2 + 32 + 16x2 = 78g

Molarity = (734/78)/0.875 = 10.754 Mol/L

5) Molar mass of   Pb(C_{2}H_{3}O_{2})_{4}

= 207.2 + ((12x2) + (1x3) + (16x2))x4

= 207.2 + (24+3+32)x4 = 443.2g

Molarity = (0.0672/443.2)/0.1335 = 0.001135 Mol/L

6) Both are the same.

Solution 1 Molarity = 1.0/1.0 = 1 Mol/L

Solution 2 Molarity = 1.0/1.0 = 1 Mol/L

Molarities of the solutions are the same.

7 0
3 years ago
What is the Equation of Reduction in Mg+F2 gives MgF2, I WILL MARK YOU AS BRAINLIST
skad [1K]

Answer:

Mg+F2= Mgf2

Explanation:

F 2 is an oxidizing agent, Mg is a reducing agent. ; Pale-yellow to greenish gas with a pungent, irritating odor.

5 0
2 years ago
• Balance this chemical equation.
user100 [1]

Answer:

Explanation:

Chemical equation:

FeCl₃  +  NaOH   →  Fe(OH)₃ + NaCl

Balanced chemical equation:

FeCl₃  +  3NaOH   →  Fe(OH)₃ + 3NaCl

Step 1:

FeCl₃  +  NaOH   →  Fe(OH)₃ + NaCl

Fe = 1                             Fe = 1

Cl =  3                            Cl = 1

Na =  1                            Na =  1

OH = 1                             OH = 3

Step 2:

FeCl₃  +  3NaOH   →  Fe(OH)₃ + NaCl

Fe = 1                              Fe = 1

Cl =  3                             Cl = 1

Na =  3                            Na =  1

OH = 3                             OH = 3

Step 3:

FeCl₃  +  3NaOH   →  Fe(OH)₃ + 3NaCl

Fe = 1                              Fe = 1

Cl =  3                             Cl = 3

Na =  3                            Na =  3

OH = 3                             OH = 3

Now we the equation is completely balanced and follow  the law of conservation of mass because there are equal number of atoms of each elements are present on both side.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction .

Type of reaction:

It is double displacement reaction.

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

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3 years ago
In Hooke's law, if a large force produces a small displacement, what does that say about the spring?
Arlecino [84]
I dont know but i just went on here to look up my answers but it 2
3 0
3 years ago
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