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Alekssandra [29.7K]
3 years ago
8

BRAINLIEST ASAP

Chemistry
1 answer:
Sveta_85 [38]3 years ago
3 0

The first three quantum numbers for electrons located in subshell 4s are :

  • n = 4

  • l = 0

  • m = 0
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A chemist prepares a solution by adding 258 mg of K2Cr2O7 (MW = 294.19 g/mol ) to a volumetric flask, and then adding water unti
Maksim231197 [3]

Answer: Molarity of the prepared solution is 1.75\times 10^{-3}mole/L

Explanation:

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

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

V_s = volume of solution in ml = 500 ml

moles of solute =\frac{\text {given mass}}{\text {molar mass}}=\frac{0.258g}{294.19g/mol}=8.77\times 10^{-4}mol

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

Molarity=\frac{8.77\times 10^{-4}moles\times 1000}{500ml}=1.75\times 10^{-3}mole/L

Thus molarity of the prepared solution is 1.75\times 10^{-3}mole/L

3 0
3 years ago
How many moles are in a solution with a concentration of 5 M and a volume of 0.25 L?
Otrada [13]

Answer:

160 mL

Explanation:

5 0
3 years ago
Which equation best represents the behavior of acetic acid, hc2h3o2, in water?
frutty [35]

The equation that best represents the behavior of acetic acid in water is; CH3CO2H + H2O ⇄ CH3CO2− + H3O+.

Acetic acid, like all other acids dissociates in water. The equation for the dissociation of acetic acid in water is; CH3CO2H + H2O ⇄ CH3CO2− + H3O+.

During this dissociation, the acid proton in acetic acid is transferred to water to form the oxonium ion H3O+.

The presence of H3O+ in solution accounts for all the observed properties of acetic acid in solution.

Learn more: brainly.com/question/14072179

3 0
2 years ago
What Group is this element in?<br> Please answer (^∇^)
Aneli [31]
Group 2 because the outer electrons ( also known as valence electrons) are 2 and that’s how we know which group it is in
5 0
3 years ago
Citric acid (h3c6h5o7) is a product of the fermentation of sucrose (c12h22o11) in air. determine the mass of citric acid produce
Alex
2.50 x 2/1 = 5 mol of Citric Acid
5 x (3+72+5+112) = 960g of Citric Acid


Answer: 960g of Citric Acid

6 0
4 years ago
Read 2 more answers
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