What is the name of this hydrocarbon? 2–methylpentyne 2–dimethylpentene 2,3–dimethylpentane 3,2

The densities of the coinage metals (copper, silver and gold) are as follows: copper = 8.95 g/cm3 silver = 12.59 g/cm3 gold = 19

ExtremeBDS [4]

1. The calculated density of the sample is 12.6 g/cm³

2. The sample is silver (option B)

<h3>Definition of density </h3>

The density of an object is defined as the mass of the object per unit volume of the object. Mathematically is expressed as:

Density = mass / volume

<h3>1. How to determine the density </h3>

Mass = 15.12 g
Volume = 1.20 cm³
Density =?

Density = mass / volume

Density = 15.12 / 1.20

Density = 12.6 g/cm³

<h3>2. How to determine the sample </h3>

Density of copper = 8.95 g/cm³
Density of silver = 12.59 g/cm³
Density of gold = 19.32 g/cm³
Calculate density = 12.6 g/cm³
Sample =?

From the above we can see that the calculated density is the approximate density of silver.

Therefore, the sample is silver

Learn more about density:

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How do you find mass in a balanced chemical equation help pleaseeee

oksano4ka [1.4K]

Chemists use balanced chemical equations as a basis to calculate how much reactant is needed or how much product will be formed in a reaction.

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3 years ago

Your town is having a meeting about whether or not to allow residents to build solar panels on their houses. Many people are aga

julsineya [31]

Putting solar panels on houses is a great idea, for it provides a renewable source of energy and heat, which is the sun. It will help prevent pollution and the mass-use of non-renewable resources, such as fossil fuels, which are used and burned for energy.

Although, having solar panels, there will be some downsides. For example, solar panels can only receive energy during time where there is light from the sun, which is daylight. therefore, the solar panels will not and cannot be able to collect energy from the sun during night time. although, depending on the solar panels, some can store energy, from the sun, that can be used at night time, like as if you're charging a battery with energy from the sun for later use. one big problem is that, solar panels are not cheap and rather quite expensive, which not all homes and families can afford. although, through time, solar panels will get cheaper.

but, all in all, I believe that solar panels give a great contribution to Earth, thus I agree to the use of solar panels.

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3 years ago

A physical change is a change to a sample of matter in which -

Readme [11.4K]

Answer:

its FALSE

Explanation:

FAKE ITS NOT REAL

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4 years ago

Sulfur dioxide, SO 2 ( g ) , can react with oxygen to produce sulfur trioxide, SO 3 ( g ) , by the reaction 2 SO 2 ( g ) + O 2 (

aleksley [76]

<u>Answer:</u> The amount of heat produced by the reaction is -21.36 kJ

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles.

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H^o_{rxn}=\sum [n\times \Delta H_f_{(product)}]-\sum [n\times \Delta H_f_{(reactant)}]$