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Phoenix [80]
3 years ago
13

HELP ASAP 30POINTS

Chemistry
1 answer:
yulyashka [42]3 years ago
7 0

Answer: A chemical change results from a chemical reaction while a physical change is when matter changes forms. In other words, a chemical change produces a new substance, and a physical change does not. For example, a chemical change includes burning, cooking, rusting and rotting, among many others. An example of a physical change includes boiling, melting, freezing, and shredding. Usually, physical changes can be undone while chemical changes cannot. The only way to reverse a chemical change is by creating another chemical reaction.

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3 years ago
When sulfur burns, it forms sulfur dioxide (SO2). Its chemical reaction is S + O2 → SO2.
Elenna [48]

Answer:

The mass of SO2 will be equal to the sum of the mass of S and O2.

Explanation:

This can be explained by the <em>Law of Conservation of Mass</em>. This law states that mass can neither be created nor destroyed. Knowing this, we can say that the reactants of a chemical reaction must be equal to the products.

In this case, the reactants Sulfur (S) and Oxygen (O2) must equal the mass of the product Sulfur Dioxide (SO2). Therefore, the statement <em>"The mass of SO2 will be equal to the sum of the mass of S and O2" </em>is correct.

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What causes the sun rays to strike Earth's surface at different angles? Please help!!!!!!!!!!!!!!!
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5 0
3 years ago
A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740 torr, and a temperature of 25 °C. Wh
Nat2105 [25]

Answer:

527.68 mL

Explanation:

We will assume that nitrogen is behaving as ideal gas here.

For ideal gas the gas law is:

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

Where

P1= initial pressure = 740 torr

V1= initial volume = 500mL

T1= initial temperature = 25⁰C = 298 K

P2= final pressure = 760 torr

V2= final volume = ?

T2= final temperature = 50⁰C = 323 K

Putting values in the gas law

Final volume = \frac{740X500X323}{298X760}= 527.68 mL

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Iron plus what equals iron chloride
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Answer:

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