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3 years ago

What are the common Hazard and Risk?

Chemistry

2 answers:

olya-2409 [2.1K]3 years ago

8 0

<h2><em>What are the common Hazard and Risk?</em></h2>

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<em>Physical <u>hazards</u> are environmental factors that can harm an employee without necessarily touching them, including heights, noise, radiation and pressure. Safety. These are hazards that create unsafe working conditions. For example, exposed wires or a damaged carpet might result in a tripping hazard</em>

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mixas84 [53]3 years ago

7 0

Answer:

A health hazard: Any organism, chemical, condition, or circumstance that may cause injury or illness.

A physical hazard is an agent, factor or circumstance that can cause harm with contact. They can be classified as type of occupational hazard or environmental hazard.

Risks:

Risk is the possibility of a harm arising from a particular exposure to a chemical substance, under specific conditions.

Crossing the street presents the hazard of getting hit by a passing car. But risk is the likelihood of harm actually occurring.

Explanation:

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What led Marie Curie to draw the following conclusions? (b) A highly radioactive element, aside from uranium, occurs in pitchble

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Making repeated separations of the various substances in the pitchblende, Marie and Pierre used the Curie electrometer to identify the most radioactive fractions. They thus discovered that two fractions, one containing mostly bismuth and the other containing mostly barium, were strongly radioactive.

<h3>What was surprising about pitchblende?</h3>

Since it was no longer appropriate to call them “uranic rays,” Marie proposed a new name: “radioactivity.”

Even more surprising, Marie next found that a uranium ore called pitchblende contained two powerfully radioactive new elements: polonium, which she named for her native Poland, and radium.

<h3>Why is radium more radioactive than uranium?</h3>

It is 2.7 million times more radioactive than the same molar amount of natural uranium (mostly uranium-238), due to its proportionally shorter half-life.

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2 years ago

Which reaction will occur?

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<span>You have to use an activity series and then predict which metal by itself will replace the metal inside of the compound. These all appear to be single replacement reactions.</span>

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3 years ago

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In a certain chemical reaction Compound A combines with Compound B to produce Compound C (and no other products). Measurements w

Karo-lina-s [1.5K]

Answer:

Theoretical yield of C = 7.9 g

Actual amount of C isolated = 5.0 g

Explanation:

Given that in the reaction, Compound A combines with Compound B t o produce Compound C and no other products, the reaction is a combination reaction. The equation of the reaction is given below:

A + B ---> C

Part A:

From the measurement of the masses of A and B present before and after the reaction, the following values were obtained:

Initial mass of A = 4.0 g

Final mass of A = 0.0 g

Mass of A used up + 4.0 - 0.0 = 4.0 g

Initial mass of B = 9.0 g

Final mass of B = 5.1 g

Mass of B used up = 9.0 - 5.1 = 3.9 g

According to the law of conservation of mass, matter can neither be created nor destroyed but can change from one form to another. Therefore, theoretical yield of C equal the sum of the masses of A and B used up.

Theoretical yield of C = 4.0 + 3.9 = 7.9 g

Part B:

Given that the percent yield is 63.0 % = 0.63

Actual amount of C isolated = 0.63 * 7.9 = 5.0 g

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3 years ago

Which of the following illustrates the conservation of matter? A. SnO2 + H2 --> Sn + 2 H2O B. 2 C + O2 --> CO2 C. KOH + HB

olga2289 [7]

C. KOH + HBr → KBr + H₂O

Explanation:

The two equations above illustrates the conservation of matter. The law of conservation of matters states that

"in a chemical reaction, matter is neither created nor destroyed but transformed from one form to another".

By this law, we understand that the amount of a particular matter we are starting with should be the one we end with.

KOH + HBr → KBr + H₂O

Conserving Product Reactants

K 1 1

O 1 1

H 2 2

We can see that the amount on both sides are the same.

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Answer:

d is the right one. aaßriadjcjfjfjfdjfjf

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3 years ago

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What are the common Hazard and Risk?​

What are the common Hazard and Risk?