All categories

3 years ago

Is flammability a form of chemical change or physical change

Chemistry

2 answers:

Vinvika [58]3 years ago

6 0

Chemical change C===3

Gnoma [55]3 years ago

3 0

Answer:

When a fuel burns, it combines with oxygen int the air and changes into the substances water and carbon dioxide.

You might be interested in

The metal content of iron in ores can be determined by a redox procedure in which the sample is first oxidized with Br2 to conve

coldgirl [10]

Answer:

80.27%

Explanation:

Let's consider the following balanced equation.

2 Fe³⁺(aq) + Sn²⁺(aq) ⇒ 2Fe²⁺(aq) + Sn⁴⁺(aq)

First, we have to calculate the moles of Sn²⁺ that react.

$\frac{0.1015molSn^{2+} }{1L} .13.28 \times 10^{-3} L=1.348\times 10^{-3}molSn^{2+}$

We also know the following relations:

According to the balanced equation, 1 mole of Sn²⁺ reacts with 2 moles of Fe³⁺.
1 mole of Fe³⁺ is oxidized from 1 mole of Fe.
The molar mass of Fe is 55.84 g/mol.

Then, for 1.348 × 10⁻3 moles of Sn²⁺:

$1.348\times 10^{-3}molSn^{2+}.\frac{2molFe^{3+} }{1molSn^{2+} } .\frac{1molFe}{1molFe^{3+} } .\frac{55.84gFe}{1molFe} =0.1505gFe$

If there are 0.1505 g of Fe in a 0.1875 g sample, the mass percentage of Fe is:

$\frac{0.1505g}{0.1875g} \times 100 \% = 80.27\%$

5 0

3 years ago

Which of the following is a way of purifying water?

Finger [1]

What are the answers choices?

4 0

3 years ago

Balance this equation. Not all spots have to have a number.

Lisa [10]

2Na+2H2O----2NaOH+H2

3 0

3 years ago

Which resource do these turbines gather? A water о в оll C natural gas D. wind

lapo4ka [179]

Answer:

D....

Explanation:

3 0

3 years ago

Which of the following is not a chemical property?

malfutka [58]

Density is not a chemical property. It is a physical property.Electromotive force, Flammability and pH are chemical properties.

8 0

3 years ago