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vekshin1
3 years ago
12

Near Tatooine's famous Mos Eisley Space port you found a 774.92 mL block of gold. What is the mass in kilograms of this block? H

ELp me please!! I need to turn this in soon
(1000 g = 1 kg, 2.2 lbs = 1 kg)

Metal Density (g/cm3)
Aluminum 2.7
Zinc 7.1
Copper 9.0
Silver 10.5
Lead 11.4
Gold 19.3
Chemistry
1 answer:
natima [27]3 years ago
8 0
774.92 ml = 0.77492 L =0.77492 cm3
Gold density =19.3 = x/0.77492 => x=14.96 g = 0.01496 Kg
Can u mark it brainliest if my answer is correct?
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What is one group of people or animals that are impacted by ocean acidification?
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Answer:

Impacts on Ocean Life

Coral Reefs.

Oysters, Mussels, Urchins and Starfish.

Zooplankton.

Plants and Algae.

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Explanation:

6 0
3 years ago
Read 2 more answers
A gas mixture contains the following gases with the mole fractions indicated: nitrogen (0.21), oxygen (0.16), carbon dioxide (0.
alukav5142 [94]

Answer:

Mole fraction Ar = 0.31

Explanation:

Remember that the sum of the mole fractions in a mixture of gases = 1

Mole fraction = Moles from a gas / Total moles

Mole fraction N₂+ Mole fraction O₂+ Mole fraction SO₂+ Mole fraction CO₂ + Mole fraction Ar = 1

N₂ = 0.21

O₂= 0.16

CO₂ = 0.23

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Mole fraction Ar = 0.31

4 0
3 years ago
When hydrogen is combined with a metal, it has an oxidation number of _____.
solmaris [256]
The answer is c because thats the number when combined with a metal. +1 is when its combined with a nonmetal. 
8 0
3 years ago
Why are intermolecular forces generally much weaker than bonding forces?.
swat32

Explanation:

<em><u>Intermolecular forces:</u></em> These are the attractive or repulsive forces acting between two molecule in interaction.

The attractive forces between molecules are of several types based on the interaction between molecules also known as Vander wall forces.

<em><u>Bonding forces:</u></em> They are also attractive forces acting between two constituents (atom, ion, radicals etc) and stabilizes the constituent particles by loss of energy. The bond between any two species are formed by the overlapping of corresponding orbitals.

Whenever positive overlapping occurs between species, the formation of Bonding molecular orbital (BMO) takes place. and when electron enters into BMO it loses energy. Alternative form of explaining the concept is <em>Individual electron possess more energy than the electrons that paired or Bonded.</em>

Now coming to your question,

All the intermolecular forces are formed by weak attractive forces (vanderwall forces) which includes Ion-dipole forces, Ion-induced-dipole forces, Dipole-dipole forces, Dipole-induced-dipole forces, Hydrogen bonds & London forces.

All these forces are temporary and weak, and formed by the poles generated on molecule due to shift of electron, for e.g. Any molecule having more electron at one pole and less electron at another pole then that molecule start acting as charged body when that charged body comes in contact with opposite pole of another charged body the interaction takes place, since the electrons are dynamic and unsteady it's not possible that the pole will keep acting same as before. hence the intermolecular forces are generally weaker.

On the other side the Bonding electrons, are formed by the various strong overlapping such as between Head to Head overlapping leads to formation of Sigma bond which is the strongest bond takes alot of Energy to break & Lateral overlapping lead to formation of pi bond which is also stronger bond than that of Hydrogen bond.

<em><u>Thanks for joining brainly community!</u></em>

6 0
2 years ago
Calculate the approximate enthalpy change, δhrxn, for the combustion of one mole of methane a shown in the balanced chemical equ
Elena L [17]
To solve for the enthalpy of reaction, we apply the Hess's Law.

ΔHrxn = ∑(ν×Hf of products) - ∑(ν×Hf of reactants)
where
v is the stoichiometric coefficient determined from the balanced reaction
Hf is the standard heat of formation; these are empirical values:
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*For O</span>₂: Hf = 0
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</span>ΔHrxn = [(2*-241.82 kJ/mol)+(1*-393.5 kJ/mol)] - [(1*−74.87 kJ/mol)+(2*0 kJ/mol)] =<em> -802.27 kJ/mol</em>
4 0
3 years ago
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