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Art [367]
3 years ago
5

Who made polio vaccine

Chemistry
2 answers:
borishaifa [10]3 years ago
8 0
The polio vaccination was created by a polish-American named Albert Sabin. But the vaccine was discovered by Jonas Salk.
yulyashka [42]3 years ago
5 0
The creator of the Polio Vaccine was Jonas Salk.
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2 The substance has a mass of 0.50 kg.
katen-ka-za [31]

Answer:

68000J/kg

Explanation:

Given parameters:

 Mass of the substance  = 0.5kg

 Quantity of heat transferred to the body  = 34000J

 

Unknown:

Specific latent heat of fusion = ?

Solution:

The specific latent heat is usually involve in phase changes;

  H  = mL

H is the quantity of heat supplied

m is the mass

L is the specific latent heat

 Insert the parameters and solve;

     34000 = 0.5 x L

         L  = \frac{34000}{0.5}   = 68000J/kg

5 0
2 years ago
If hydrogen and oxygen were to chemically bond together, what kind of bond would be created
svetlana [45]
Water dude lol H²0 (dont you know?) #rhymes

H²o → Hydrogen [The 2 means there are two hydrogen atoms], Oxygen = H²O
5 0
3 years ago
A habit is: <br>pls help me ty​
kherson [118]
What class is this? (Subject)
4 0
2 years ago
Read 2 more answers
When heat energy is removed, two changes are observed:
harkovskaia [24]

Answer: Option (A) is the correct answer.

Explanation:

Condensation is defined as the process in which vapors or gaseous phase changes into liquid phase.

Freezing is the process in which liquid phase changes into solid phase.

Evaporation is the process in which liquid phase changes into vapors or gaseous phase.

Melting is the process in which solid phase changes into liquid phase.

Therefore, we can conclude that names for given phase changes A and B is that A is condensation and B is freezing.

3 0
3 years ago
Read 2 more answers
14.A sample of fluorine gas has a density of _____
yarga [219]

Answer:

d = 0.793 g/L

Explanation:

Given data:

Density of fluorine gas = ?

Pressure of gas = 0.554 atm

Temperature of gas = 50 °C (50+273.15K = 323.15 K)

Solution:

Formula:

PM = dRT

M = molar mass of gas

P = pressure

R = general gas constant

T = temperature

d = PM/RT

d = 0.554 atm × 37.99 g/mol / 0.0821 atm.L /mol.K × 323.15 K

d = 21.05 atm.g/mol/26.53 atm.L /mol

d = 0.793 g/L

8 0
3 years ago
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