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mr_godi [17]
3 years ago
15

Which statement is true?

Chemistry
2 answers:
alexira [117]3 years ago
5 0

Answer:

which statement?

Explanation:

nothing is there

Scilla [17]3 years ago
4 0

Answer:

?????

Explanation:

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The enthalpy of fusion of H2O (s) at its normal melting point is 6.01 kJ/mol. What is the entropy change for freezing 1 mole of
Rom4ik [11]

Answer:

22.01J/Kmol

Explanation:

The parameters given in this question are;

Enthalpy (H) = 6.01 kJ/mol.

Number of moles = 1

Entropy change (S) = ?

The formular relationship between entropy and enthalpy is given as;

ΔS=ΔH/T

Temperature for water at freezing point = 0C + 273 = 273 K (converting to Kelvin)

ΔS = 6.01/273

ΔS = 0.0220kJ/Kmol

ΔS = 0.02201 * 1000 = 22.01J/Kmol

3 0
3 years ago
What is the total number of atoms in 3.0 molecules of propanone, CH3COCH3? (Avogadro’s constant = 6 x 1023 mol-1)
BigorU [14]

Answer:

1.81 x 10²⁴atoms

Explanation:

Given parameters:

Number of molecules  = 3 moles

Unknown:

Number of atoms = ?

Solution:

To solve this problem, we are going to use the mole concept.

   1 mole of any substance contains 6.02 x 10²³ atoms

 So

   3 mole of propanone will contain 3 x  6.02 x 10²³ atoms  = 1.81 x 10²⁴atoms

4 0
3 years ago
Part
Zielflug [23.3K]
NaOH (aq) + HCl(aq) => NaCl(aq)+ H2O(l)

Na+(aq)+ OH - (aq) + H +(aq) +Cl - (aq) + Cl- (aq)
=> Na+(aq) + Cl - (aq) + H2O(l)
H+(aq) + OH-(aq) => H2O(l)
6 0
3 years ago
First to answer right gets Brainiest!!!!!!
Elanso [62]

Answer:

1) Tetanus is a potentially fatal bacterial infection that affects the nerves

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4) The tetanus vaccine is made by taking the tetanus toxin and inactivating it with a chemical. The inactivated toxin is called a "toxoid." Once injected, the toxoid elicits an immune response against the toxin

5) Tetanus antiserum was developed in 1890, with its protective effects lasting a few weeks. The tetanus toxoid vaccine was developed in 1924, and came into common use for soldiers in World War II.

6)CDC recommends tetanus vaccination for all babies and children, preteens and teens, and adults

7) After the initial tetanus series, booster shots are recommended every 10 years.

8)help your immune system protect against these infections

9)Reported tetanus cases have declined more than 95%, and deaths from tetanus have declined more than 99% in the United States since 1947.

10) although the tetanus vaccine can be a very rare cause of a short-lived allergic reaction called "anaphylaxis," the tetanus vaccine does not cause death so the benefits outweigh.

11)They are most commonly found in animal manure and contaminated soil, but may exist virtually anywhere.

7 0
3 years ago
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Which statement is true about a proton and a neutron?
igor_vitrenko [27]

the right one to this would be they have different masses and different charges as a proton has a mass that is less then that of a neutron and has a positive charge vs the  is neutral charge of the neutron

4 0
4 years ago
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