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lisabon 2012 [21]
4 years ago
10

Can anyone teach me how to do double replacement?? please, im taking the AP test in a couple of hours. please dont just copy som

ething off somewhere else. i need someone who actually understands and i can ask questions to
Chemistry
1 answer:
inysia [295]4 years ago
4 0

Answer:

Step 1: Identify the Individual Ions from the Reactants and Their Charges

Step 2: Switch the Cations and Anions of the reactants

Step 3: Balance the Chemical Reaction

Explanation:

i hope i helped =)

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Define "Homoglycan" and "Heteroglycan" and give an example of each
lina2011 [118]

Answer:

Polysaccharides, also known as glycans, are the polymers of carbohydrate. These polymers are composed of the monosaccharide monomeric units that are joined together by glycosidic bonds.  

A polysaccharide molecule composed of the same type of monosaccharide units is known as homopolysaccharide or homoglycan.

Example: Cellulose, glycogen, and cellulose.

Whereas, a polysaccharide molecule composed of more than type of monosaccharide is known as heteropolysaccharides or heteroglycans.

Examples: Hyaluronic acid and heparin

4 0
3 years ago
PLEASE HELP ME!!!! WILL GIVE BRAINLIEST!!!!
vitfil [10]

Answer: 1. 3.23 m

2. 32.4

3. B  adding solvent  and C  removing solute

Explanation:

1. Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent

Molality=\frac{n}{W_s}

where,

n = moles of solute

W_s = weight of solvent

Now put all the given values in the formula of molality, we get

Molality=\frac{43.6mol}{13.5kg}=3.23mol/kg

2. Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n}{V_s}

where,

n = moles of solute

V_s = volume of solution in L

3.4=\frac{n}{9.54}

n=32.4

Therefore, the moles of Na_2CO_3 is 32.4

3. Molarity can be decreased by decreasing the moles of solute and by increasing the volume of solution.

Thus adding solvent  and removing solute will decrease the molarity.

4 0
3 years ago
Which two factors must be equal when a chemical reaction reaches equilibrium?
Art [367]
The correct answer is the statement in option 3. Chemical equilibrium is achieved when both the reactants and the products are in concentrations that has no further tendency to change even as time goes to infinity. This happens when the forward reaction rate is the same as the reverse reaction rate.
3 0
3 years ago
What net force is required to push a sofa with a mass of 59 kilograms so that it accelerates at 9.75 meters/second^2
Tresset [83]
Force = Mass * Acceleration = 59 kg * 9.75 m/s^2 = 575.25 N
6 0
4 years ago
Read 2 more answers
3.
Alecsey [184]

Answer:

<h3>no it is not allowed</h3>

Explanation:

<h3>Liwis structure shows the elements symbol with dots thet represents valance electrons ; in second row elements their atomic number is 3 up to 10 , from Li up to Ne from their electron configuration their valance electron will be from 1 up to 8 respectivelly ,if lewis structure represents the element with it is symbol and dots that represents valance electron the second row elements cannot have more than an octet of valance electrons surrounding it.</h3>

<h3>I think it is help ful for you </h3>
3 0
3 years ago
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