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alexira [117]
3 years ago
10

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

Chemistry
1 answer:
r-ruslan [8.4K]3 years ago
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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Which family of elements can be found in the area marked B
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Answer:

A) Alkaline Earth Metals

Explanation:

Area Marked A would be Alkali Metals

Area Marked B would be Alkaline Earth Metals

Area Marked C would be Transition Metals

Area marked H would be Halogens

3 0
3 years ago
Write the skeleton equation for the reaction which occurs when a solution of silver nitrate reacts with copper metal to produce
Kitty [74]

Answer:

This reaction can be expressed as a word equation: copper + silver nitrate → silver + copper nitrate You can replace each part of the word equation by a chemical formula: Cu + AgNO3 → Ag + Cu(NO3)2 Looking at both sides of this equation, you can see that it is not balanced.

6 0
2 years ago
*explain your answer for brainliest
Over [174]

Answer:

3 mol Cl₂/2 mol AlCl₃ (three over two)

Step-by-step explanation:

Start with the balanced equation"

2Al + 3Cl₂⟶ 2AlCl₃

The steps in the calculation are

mass of AlCl₃ ⟶ moles of AlCl₃⟶ moles of Cl₂ ⟶ mass of Cl₂

The critical step is the <em>conversion of moles</em>.

You multiply the moles of AlCl₃ by a <em>conversion factor</em> to get moles of Al:

Moles of AlCl₃ × conversion factor = moles of Al.

The conversion factor is <em>the molar ratio</em>, and it uses the coefficients of the formulas in the balanced equation.

It is either (2 mol AlCl₃/3 mol Cl₂) or (3 mol Cl₂/2 mol AlCl₃).

You choose the one that has the desired units of the answer in the numerator.

We choose the second option, because it has the correct units.

For example,

\text{0.2 mol AlCl}_{3} \times \frac{3\textbf{ mol Cl}_{2} }{ 2\text{ mol AlCl}_{3} } = 0.3\textbf{ mol Cl}_{2})

Notice how the units "mol AlCl₃" cancel and the correct units appear in the answer.

If we had used the other conversion factor, we would have gotten the wrong units.

3 0
3 years ago
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avanturin [10]
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5 0
3 years ago
Read 2 more answers
How do I put decomposition reactions together and make a balanced equation?
Anna35 [415]

Answer:

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2H20 —> 2H2 + O2

MgBr2 —> Mg + Br2

2AlCl3 —> 2Al + 3Cl2

2KI —> 2K + I2

2NaCl —> 2Na + Cl2

Explanation:

3 0
3 years ago
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