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3 years ago

An object has a density of 4.5kg/mL and a mass of 3.56kg. What is the volume of the object in ml?

1 answer:

7 0

Density has a formula of::

Density = Mass/Volume

To work out volume, we must isolate it’s variable in the formula, where doing so gives us::

Volume = Mass/Density

If we now substitute in our values, the volume of the object becomes 0.791 kg (recurring 1)!

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What are the classes of alkanol

LuckyWell [14K]

1-PRIMARY ALKANOL 2-SECONDARY ALKANOL 3-TERTIARY ALKANOL

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3 years ago

A tree trunk floating in the water<br> Balanced<br> Or<br> Unbalanced

mars1129 [50]

Answer:

Balanced

Explanation:

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3 years ago

1.what is the mass of an atom.<br>2.what is the difference between an ion and atom.

blsea [12.9K]

Answer: Atoms are single neutral particles, and an ion is a positively or negatively charged particle.

Explanation:

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3 years ago

At 25°C and constant pressure, carbon monoxide gas combines with oxygen gas to give carbon dioxide gas with the evolution of 10.

stealth61 [152]

Answer : The value of $\Delta H$ for the reaction is, -565.6 kJ

Explanation :

First we have to calculate the molar mass of CO.

Molar mass CO = Atomic mass of C + Atomic mass of O = 12 + 16 = 28 g/mole

Now we have to calculate the moles of CO.

$\text{Moles of }CO=\frac{\text{Mass of }CO}{\text{Molar mass of }CO}=\frac{1g}{28g/mole}=\frac{1}{28}mole$

Now we have to calculate the value of $\Delta H$ for the reaction.

The balanced equation will be,

$2CO(g)+O_2(g)\rightarrow 2CO_2(g)$

From the balanced chemical reaction we conclude that,

As, $\frac{1}{28}mole$ of CO release heat = 10.1 kJ

So, 2 mole of CO release heat = $2\times 28\times 10.1=565.6kJ$

Therefore, the value of $\Delta H$ for the reaction is, -565.6 kJ (The negative sign indicates the amount of energy is released)

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3 years ago

Any atom is most stable when it’s outermost energy level contains

slamgirl [31]

Explanation:

Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons. Sodium atoms have 11 electrons. Two of these are in the lowest energy level, eight are in the second energy level and then one electron is in the third energy level.

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3 years ago