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likoan [24]
3 years ago
7

Question 1

Chemistry
1 answer:
Gnoma [55]3 years ago
4 0

Answer:

2.1 × 10^-8 J/°c

Explanation:

Is this the answer if yes I would explain if not , that's all I know .

You might be interested in
A 0.286-g sample of gas occupies 125 ml at 60. cm of hg and 25°
irga5000 [103]
Using the Equation: PV=nRT
Where P is the pressure 60 cmHg or 600 mmHg or 600/760= 0.789 atm
V is the volume 125 ml or 0.125 L, n is the number of moles, R is a constant 0.082057, and T is temperature 25 °C or 298 K; 
Therefore:
0.789 × 0.125 = n × 0.082057 × 298
 n = 0.0987/24.45 
    = 0.004036 mol
0.004036 mole has a mass of  0.286 g
Hence; 1 mole has a mass of 0.286/0.004036 
  = 70.8 g /mol
Therefore the molar mass of the gas is 71 g/mol (2 sfg)

     

4 0
3 years ago
Buffer consists of undissociated acid (ha) and the ion made by dissociating the acid (a-). How does this system buffer a solutio
docker41 [41]

In buffer solution there is an equilibrium between the acid  HA and its conjugate base A⁻: HA(aq) ⇌ H⁺(aq) + A⁻(aq).

When acid (H⁺ ions) is added to the buffer solution, the equilibrium is shifted to the left, because conjugate base (A⁻) reacts with hydrogen cations from added acid, according to Le Chatelier's principle: H⁺(aq) + A⁻(aq) ⇄ HA(aq). So, the conjugate base (A⁻) consumes some hydrogen cations and pH is not decreasing (less H⁺ ions, higher pH of solution).

A buffer can be defined as a substance that prevents the pH of a solution from changing by either releasing or absorbing H⁺ in a solution.

Buffer is a solution that can resist pH change upon the addition of an acidic or basic components and it is able to neutralize small amounts of added acid or base, pH of the solution is relatively stable


3 0
3 years ago
Draw the Lewis Structure for NaCl
Trava [24]

Explanation:

The electronic configuration of sodium with Z = 11 is : 2, 8, 1

The electronic configuration of chlorine with Z = 17 is : 2, 8, 7

The Lewis structure is drawn in such a way that the octet of each atom is complete.

Thus, sodium losses one electron to chlorine and chlorine accepts this electron to form ionic bond.

Thus, the valence electrons are shown by dots in Lewis structure. The structure is shown in image below.

8 0
3 years ago
Name the three functional groups in the compound pictured.
oksian1 [2.3K]

The three functional groups shown in the image are: ester, alkoxy and carboxyl.

<h3>What are functional groups?</h3>

Chemical properties depend on its structure. Certain properties, too, are attributable to an atomic group ordered in a particular way, apart from the whole of the molecule. Such groups of atoms that determine the chemical properties of compounds are called<em> functional groups</em>.

The functional group can be on the primary, secondary, or tertiary carbon.

Functional groups are often found on molecules of biological importance.

Functional groups are usually formed by a set of elements such as carbon, hydrogen and oxygen, attached to the hydrocarbon chain, giving the molecule characteristics. Can also include other elements such as sulfur or nitrogen.

Molecules can have more than one functional group on it, having different combinations on it that can affect properties of the molecule such as solubility, structure, or reactivity.

Carboxyl groups are usually seen in amino acids, fatty acids and other molecules since it is a fairly common functional group.

Therefore, we can confirm that the three functional groups shown in the image are: ester, alkoxy and carboxyl.

To learn more about functional groups visit: brainly.com/question/14618322?referrer=searchResults

#SPJ1

8 0
2 years ago
Which particle changes to create a new element? <br> A.proton<br> B.neutron<br> C.electron
Andru [333]

Answer: A

Explanation:

4 0
4 years ago
Read 2 more answers
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