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4 years ago

How did Alexander Fleming’s research solve a societal problem?

Chemistry

2 answers:

Anuta_ua [19.1K]4 years ago

7 0

Alexander Fleming discovered a new type of medicine (penicillin) that could treat infections.

OLga [1]4 years ago

4 0

I think Alexander Fleming discovered a new type of medicine (penicillin) that could treat infections.
Hope that helped you.

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In dimensional analysis you should always have the same units adjacent to each other (top left to bottom right)

aleksklad [387]

Answer:

False

Explanation:

3 0

3 years ago

What should you do with a rag that has been used to wipe up spilled gasoline? a)Place it in the bilge. b)Hang it over the gunwal

Tcecarenko [31]

Answer:

A rag contaminated with gasoline is considered a hazard waste. The question seems to be asked to ask for indications of rag disposal on a ship, and if so, the answer is d) Discard it on land BUT with special precautions

Explanation:

Gasoline is a highly flammable organic solvent that is used as fuel. For the above is a dangerous substance. while the ship reaches the mainland, the rag must be stored avoiding contact with environmental agents such as the sun, pets or food. Once in a dry land the rag can be delivery for accurate disposal.

I hope my answer helps you

6 0

3 years ago

The density of water at 4 degrees Celsius is 1.000 g/mg is it chemical or physical property?

Kaylis [27]

Answer:

Physical Property

Explanation:

Density, mass, volume, color, melting and boiling points, etc. are all physical properties. No matter what changes, the chemical makeup stays the same.

Flamability, acidity, toxicity, etc. are chemical properties, because they chemically change the makeup of the object/thing.

7 0

3 years ago

What is the concentration of 60 mL of H3PO4 if it is neutralized by 225 mL of 2 M Ba(OH)2?

goldfiish [28.3K]

7.5 M is the concentration of 60 ml of H3PO4 if it is neutralized by 225 ml of 2 M Ba(OH)2.

Explanation:

Data given:

volume of phosphoric acid, Vacid =60 ml

volume of barium hydroxide, Vbase = 225 ml

molarity of barium hydroxide, Mbase = 2M

Molarity of phosphoric acid, Macid =?

the formula for titration is used as:

Macid x Vacid = Mbase x Vbase

rearranging the equation to get Macid

Macid = $\frac{Mbase x Vbase}{Vacid}$

Macid = $\frac{225 X 2}{60}$

Macid = 7.5 M

the concentration of the phosphoric acid is 7.5 M and the volume is 60 ml. Thus 7.5 M solution of phosphoric acid is used to neutralize the barium hydroxide solution of 2M.

8 0

4 years ago

Read 2 more answers

Which of the following is a compound?<br> a. iron<br> b. lead<br> c. helium<br> d. methane

Lana71 [14]

The correct answer is d) methane ( $CH_4$ )

The other options are elements.

6 0

3 years ago