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kari74 [83]
3 years ago
11

Who discovered penicillin and why were chemist important in turning penicillin into a widely used life-saving medicine

Chemistry
1 answer:
Deffense [45]3 years ago
8 0
Alexander Fleming and penicillin is used to help fight gram positive bacteria and other bacterial infections
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Which of the following type of radiation is represented by 0 over negative 1 e? A.alpha emission B.beta emission C.positron emis
Zolol [24]
The answer is B. beta emission. Alpha emission is a particle with 2 protons and 2 neutrons. Positron emission is represented by 0 over positive 1 e. Gamma rays is 0 over 0 γ.
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3 years ago
4. How many milligrams are in 5.25 x 10-13 kg?<br><br> the “-13” is an exponent
rusak2 [61]

5. 25 x 10⁻⁷mg

Explanation:

This is mass conversion from mg to kg;

The kg is a quantity of mass used to measure the amount of matter in a substance.

   Given mass = 5.25 x 10⁻¹³kg

The kilo-  is a prefix that denotes 10³

  therefore;

         1000g = 1kilogram

 the milli-  is a prefix that denotes 10⁻⁻³

       1000mg = 1g

Now that we know this, we can convert:

   5.25 x 10⁻¹³kg  x \frac{1000g}{1kg}  x \frac{1000mg}{1g}   =  5. 25 x 10⁻¹³ x 10⁶mg

      =  5. 25 x 10⁻⁷mg

learn more:

Conversion brainly.com/question/1548911

#learnwithBrainly

8 0
3 years ago
Ionic bonds are strong; therefore, ionic compounds
Bess [88]
This is not a question
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8 0
2 years ago
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HELP ME PLEASE (brainliest)
Aloiza [94]

Answer: i would say D or the last one.

Explanation: According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.

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2 years ago
Why did the thirteen American colonies want to purchase goods from the West Indies? A.The West Indies were the only places that
disa [49]

Answer:

b

Explanation:

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2 years ago
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