What type of bonds are formed between silicon(Si) and oxygen(O) in silicon dioxide (SiO2), a commonly component of sand?

Chemistry

1 answer:

Sladkaya [172]3 years ago

6 0

Answer:

Silicone Dioxide

Explanation:

It is found on sand since ancient times and also a major component of glass..I have heard of a case when a lightning hit the sand and the sand actually turned into a somewhat glasslike figure

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Which of the following properties can be used as evidence a chemical reaction has occurred? (Select all that apply)

frutty [35]

Density, odor, and color changes. Hope this helps ฅ^•ﻌ•^ฅ

8 0

3 years ago

Read 2 more answers

A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L

NeTakaya

Answer:

$\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}$

Explanation:

In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:

$P_1V_1=P_2V_2$

Now we can substitute any known values into the formula.

Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.

$25.0 \ L * 2.05 \ atm = P_2V_2$

The volume is decreased to 14.5 liters, but the pressure is unknown.

$25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L$

Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .

$\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}$