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3 years ago

How does finding the density of an object help you identify the material an objectbis composed of?

Chemistry

1 answer:

Tanya [424]3 years ago

5 0

Answer:

Density can be calculated by dividing an object's mass by its volume. Since different materials have different densities, measuring an object's density can help determine which materials are in it. Finding the density of a metal sample can help to determine its purity.

Explanation:

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What is the IUPAC name of a bromobenzene with carboxylic acid attached

LuckyWell [14K]

Answer:

Bromobenzoic acid

Explanation:

COOH has higher priority than Br, so the parent name is benzoic acid.

The COOH group is automatically on C1 of the ring, and the other aromatic carbons are numbered sequentially around the ring.

The name of the substituent is joined to that of the parent, and the locant is attached to that with a hyphen.

The generic IUPAC name is bromobenzoic acid.

There are three isomers of benzoic acid — 2-bromobenzoic acid, 3-bromobenzoic acid, and 4-bromobenzoic acid — so you must always specify which one you mean.

5 0

3 years ago

The balanced combustion reaction for C6H6 is 2C6H6(l)+15O2(g)⟶12CO2(g)+6H2O(l)+6542 kJ If 8.600 g C6H6 is burned and the heat pr

jenyasd209 [6]

Answer : The final temperature of the water is, $22.5166^oC$

Explanation : Given,

Mass of benzene = 8.600 g

Molar mass of benzene = 78 g/mole

First we have to calculate the moles of benzene.

$\text{Moles of benzene}=\frac{\text{Mass of benzene}}{\text{Molar mass of benzene}}=\frac{8.600g}{78g/mol}=0.1103mole$

Now we have to calculate the energy of combustion.

The given balanced chemical reaction is:

$2C_6H_6(l)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(l)+6542 kJ$

According to reaction,

As, 2 moles of benzene gives 6542 kJ of energy on combustion.

So, 0.1103 mole of benzene gives $\frac{6542 kJ}{2}\times 0.1103=360.7913kJ$ of energy on combustion.

Now we have to calculate the final temperature of the water.

Formula used : $q_w=m_w\times c_w\times \Delta T=m_w\times c_w\times (T_{final}-T_{initial})$

where,

$q_w$ = heat released = 360.7913 kJ = 36079.13 J

$m_w$ = mass of water = 5691 g

$c_w$ = specific heat of water= $4.18J/g^oC$

$T_{final}$ = final temperature = ?

$T_{initial}$ = initial temperature = $21^oC$

Now put all the given values in the above formula, we get:

$36079.13J=5691g\times 4.18J/g^oC\times (T_{final}-21^oC)$

$T_{final}=22.5166^oC$

Therefore, the final temperature of the water is, $22.5166^oC$

8 0

4 years ago

10 points) Which is larger? Ba²+ or Ba explain

lutik1710 [3]

Answer:

Ba is larger than Ba2 + B a 2 + because it has two more electrons.

Explanation:

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6 0

1 year ago

How can i find nuclear charge and overall charge while only knowing the atomic mumber, number of protons and electrons?

Mazyrski [523]

Explanation:

An atom is made up of:

Protons which are the positively charged particles
Electrons are negatively charged
Neutrons carry no charges.

Atomic number is the number of protons in an atom.

To find the nuclear charge:

We use the effective nuclear charge formula:

Effective nuclear charge = Atomic number - number of shielding electrons(non-valence electrons)

The shielding electrons are the non-valence electrons in the inner orbitals.

For example:

Ne:

atomic number = 10

Effective nuclear charge = 10 - (2) = 8+

Number of non-valence electrons is 2

The effective nuclear charge is 8+

Overall charge:

Charge = number of protons - number of electrons

For neutral atoms, the overall charge is zero as the number of protons and electrons are the same.

Learn more:

Effective nuclear charge brainly.com/question/5441986

#learnwithBrainly

7 0

3 years ago

How many grams are in 6.53 moles of Pb

dezoksy [38]

Mr: 207.2
m=n×Mr= 6.53×207.2= 1353.02g

7 0

3 years ago

How does finding the density of an object help you identify the material an objectbis composed of?​

How does finding the density of an object help you identify the material an objectbis composed of?