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3 years ago

Which of the following best describes a non metal

Chemistry

2 answers:

Andre45 [30]3 years ago

6 0

Answer:

-a nonmetal is a substance that lacks the characteristics of a metal.

-Seventeen elements are generally classified as nonmetals: most are gases (hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon); one is a liquid (bromine); and a few are solids (carbon, phosphorus, sulfur, selenium, and iodine).

mihalych1998 [28]3 years ago

4 0

A non metal substance is one that lack the characteristics of metal substances, so non metal substances are not good conductors of heat and electricity, they are not ductile, they aren’t malleable, they aren’t lustrous, etc.

Basically non metal substances are those substances that don’t have the characteristics that metal substances have.

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Alcl3+Na =NaCl+ Al .did Al change oxidation number

saul85 [17]

Answer:

yes it is ( From +3 to 0 )

Explanation:

If this is the balanced equation:

AlCl3 + 3Na ——> 3NaCl + Al

Al Cl 3Na Na Cl Al

+3 -3 0 +1 -1 0

5 0

3 years ago

The decomposition of ammonia is: 2 NH3(g) ⇌ N2(g) + 3 H2(g). If Kp is 1.5 × 103 at 400°C, what is the partial pressure of ammoni

ValentinkaMS [17]

Answer:

" $6.7\times 10^{-4} \ atm$ " is the right answer.

Explanation:

Given:

Partial pressure of $N_2$ ,

= 0.20 atm

Partial pressure of $H_2$ ,

= 0.15 atm

$K_p = 1.5\times 10^3$ at $400^{\circ} C$

As we know,

⇒ $K_p = \frac{pN_2\times pH_2^3}{pNH_3^2}$

By putting the values, we get

$1.5\times 10^3=\frac{0.20\times (0.15)^3}{pNH_3^2}$

$pNH_3^2 = \frac{0.000675}{1.5\times 10^3}$

$=6.7\times 10^{-4} \ atm$

3 0

3 years ago

Formulate a hypothesis based on something recently observed.

lara [203]

Answer:

If garlic repels fleas, then a dog that is given garlic every day will not get fleas. Bacterial growth may be affected by moisture levels in the air. If sugar causes cavities, then people who eat a lot of candy may be more prone to cavities.

Explanation:

3 0

3 years ago

9.00 g/h to kilograms per minute

Mkey [24]

9.00g/1hr * 1kg/100g * 1hr/60min = 0.00015kg/min or 1.5 * 10^-4kg/min.

4 0

4 years ago

A gas measures 725mm and 32C. what will be the temperature of the gas at 705mm?

garri49 [273]

Answer:

31°C

Explanation:

Using the ratio, we can find the temperature of the gas at 705mm.

725mm : 32°C

705mm : x

[ x is the temperature we have to find ]

Cross multiply the ratios.

725x = 705 × 32

725x = 22560

x = $\frac{22560}{725}$ = 31°C

8 0

2 years ago