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4 years ago

Dalton’s atomic theory included which idea?

Chemistry

1 answer:

Kazeer [188]4 years ago

6 0

Answer:

Everything is composed of atoms, that are the indivisible building blocks of matter that cannot be destroyed. All atoms of an element are identical.

Explanation:

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A gas at constant pressure occupies 0.400 L at 50.0°C. What volume will it have at 300.°C? If you could show work that would rea

DaniilM [7]

This can be solved using the Combined Gas Law. The formula for that is

$\frac{P_{1} V_{1} }{T_{1} } = \frac{P_{2} V_{2} }{T_{2} }$

Let's go ahead and fill in our known values. Since pressure remains the same, it doesn't matter what number we use, so let's assume 1 atm on both sides. For temperature, remember to convert it to Kelvin first (K = C + 273).

$\frac{(1 atm) (0.400 L)}{(323 K)} = \frac{(1 atm) (x L)}{(573 K)}$

Go ahead and simplify both sides.

0.001238 = $\frac{(x L)}{(573 K)}$

Multiply both sides by 573.

0.7095 = x L

So, at 300° C, your gas will occupy 0.7095 L.

6 0

3 years ago

Fill in the blank<br><br> the transfer of heat using fluid is called ____.

Arada [10]

Thank you so much for the free points;)

7 0

3 years ago

Read 2 more answers

An unknown substance:- has a melting point of 1127 C,- is soluble in water,- does not conduct heat as a solid, andis hard.Given

Nat2105 [25]

Answer:

The unknown substance is CoF2

Explanation:

Diamond is insoluble in water. It does not conduct electricity. Every atom in a diamond is bonded to its neighbours by four strong covalent bonds, leaving no free electrons and no ions .

Most diamonds are extremely efficient thermal conductors, but electrical insulators. Diamond conducts heat well as a result of the strong covalent bonds between carbon atoms in a diamond crystal.

The melting point of diamond is about 4027 °C.

Since the melting point of diamond is way higher, it's not soluble in water and diamond does conduct heat. The unknown substance is not diamond.

SF6 is slightly soluble in water.

SF6 is not hard but it's a gas.

The melting point of SF6 is about -64 °C

Since SF6 is a gas and not a solid and has a melting point way lower than the unknown substance; the unknown substance is not SF6

Aluminum is an excellent heat and electricity conducto

The melting point of Al is 660 °C

Since Al has a lower melting point and is a good heat conductor; the unknown substance is not aluminium.

CoF2 is sparingly soluble in water.

CoF2 has a melting point between 1100 °C and 1200 °C

CoF2 is a solid but a bad heat conductor

⇒ The unknown substance is CoF2

3 0

3 years ago

A flask with a volume of 250.0 mL contains air with a density of 1.211 g/L. What is the mass of the air contained in the flask?

labwork [276]

250.0 mL in liters:

250.0 / 1000 => 0.25 L

D = m / V

1.211 = m / 0.25

m = 1.211 x 0.25

m = 0.30275 g

5 0

3 years ago

Draw the product formed when diene and dienophile react in a Diels–Alder reaction.

jarptica [38.1K]

Answer:

Explanation:

Diels-Alder reactions are cyclo-additional reactions between conjugated dienes and a dienophile (a substituted alkene compound for example acrylic acid) to produce a ring structure of cyclohexene compounds.

From the image attached below, we will see the reaction between 2,3-dimethylbuta-1,3-diene which is a conjugated diene with acrylic acid to produce a Diel-Alder adduct as the product. From the reaction, a single new π-bond and two σ-bonds are produced.

5 0

3 years ago