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kicyunya [14]
3 years ago
9

Aluminum, gold, and iron have densities of 2.7 g/cc, 19.2 g/cc, and 7.874 g/cc, respectively. Suppose 5.0g of each metal were ob

tained.

Chemistry
1 answer:
lilavasa [31]3 years ago
4 0
The question above is missing key elements of the problem to solve it properly. I have attached an image below detailing the true aim of this question.

We must match each metal to the correct cylinder corresponding to it. The idea here is that knowing the density of the metals along with the mass of each metal present, we can determine the volume of each metal. If each cylinder has the same width, then we can assume that the volume of each metal will be directly proportional to the height of the various cylinders. Now we can simply solve for the volumes, in cubic centimeters (cc/cm³).

Aluminum, Al:

5.0 g/ 2.7 g/cc = 1.9 cc

Gold, Au:

5.0 g/ 19.2 g/cc = 0.26 cc

Iron, Fe:

5.0 g/7.874 g/cc = 0.64 cc

From the following calculations, we have found that 5.0 g of aluminum has the greatest volume of 1.9 cc, followed by iron with 0.64 cc and then gold with 0.26 cc.

Therefore, aluminum will correspond to cylinder II with the greatest volume, iron will correspond to cylinder III and gold will correspond to cylinder I with the least volume.

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What does the specific heat for a substance indicate?
o-na [289]

O the amount of heat required to increase the temperature of 1 gram by 1°C

Explanation:

The specific heat of a substance is the amount of heat required to increase the temperature of 1 gram of a substance by 1°C. It is an intensive property that is specific to every substance.

The unit is given as J/g⁻¹°C⁻¹ or J/g⁻¹K⁻¹

This related to the quantity of heat using the expression below:

             Q = mC∅

Q is the quantity of heat added

m is the mass

C is the specific heat

∅ is the temperature change.

Learn more:

specific heat brainly.com/question/7210400

#learnwithBrainly

7 0
3 years ago
3.364 g of hydrated barium chloride of BaCL2.xH2O was dissolved in water and made up to a total volume of 250.0 mL. 10.00 mL of
atroni [7]

<u>Given:</u>

Mass of hydrated barium chloride = 3.364 g

Total volume of barium chloride V(total)= 250 ml

Volume taken for titration V = 10 ml

Volume of AgNO3 consumed = 46.92 ml

Concentration of AgNO3 = 0.0253 M

<u>To determine:</u>

The value of x i.e. the water of hydration in BaCl2

<u>Explanation:</u>

The net ionic equation is-

Ag⁺(aq) + Cl⁻(aq) → AgCl(s)

Based on the reaction stoichiometry: Equal moles of Ag+ and Cl- combine to form AgCl

Moles of Ag+ consumed = moles of Cl- present

Moles of Ag+ = V(AgNO3) * M(AgNO3) = 0.04692 * 0.0253 = 0.00119moles

Moles of Cl- present = 0.00119 moles

Thus, 0.00119 moles of Cl- are present in 10 ml of the solution

Therefore, number of moles of Cl- in 250 ml would be-

= 0.00119 * 250 /10 = 0.02975 moles of cl-

Now:

2 moles of Cl- are present in 1 mole of BaCl2

Therefore, 0.02975 moles of Cl- correspond to- 0.02975 * 1/2 = 0.01488 moles of BaCl2

Molar mass of BaCl2 = 208.22 g/mol

Thus, mass of BaCl2 = 0.01488 moles * 208.22 g.mol-1 = 3.098 g

Mass of water of hydration = 3.364 - 3.098 = 0.266 g

# moles of water 'x' = .266/18 = 0.015 ≅ 1

Ans: Formula for hydrated barium chloride = BaCl2. 1H2O



7 0
4 years ago
which group of the periodic table has elements with atoms that tend not to bond with other atoms of other elements
yuradex [85]
Noble gases:) they are very non-reactive
3 0
3 years ago
The rate law for the decomposition of phosphine () is It takes 135. s for 1.00 M to decrease to 0.250 M. How much time is requir
vova2212 [387]

Answer:

189.71 secs

Explanation:

We know that decomposition is a first order reaction;

So;

ln[A] = ln[A]o - kt

But;

[A]o = 1.00 M

[A] = 0.250 M

t =135 s

Hence;

ln[A] -  ln[A]o = kt

k = ln[A] -  ln[A]o/t

k = ln(1) - ln(0.250)/135

k =0 - (-1.386)/135

k = 1.386/135

k= 0.01

So time taken now will be;

ln[A] -  ln[A]o = kt

t = ln[A] -  ln[A]o/k

t = ln (3) - ln(0.450)/0.01

t = 1.0986 - (-0.7985)/0.01

t = 1.0986 + 0.7985/0.01

t = 189.71 secs

8 0
3 years ago
Does a relationship exist between a planets mass and becoming a ring system?
joja [24]

Answer:

A planet is believed to form when the mutual gravitational attraction of debris orbiting a star accumulates into a growing mass.

Explanation:

Planetary rings, then, consist of millions of separate small rock and ice particles, each maintaining their own orbit around the host planet.

6 0
3 years ago
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