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IrinaK [193]
3 years ago
13

Help me ASAP !!!!!!!!!!

Chemistry
1 answer:
lapo4ka [179]3 years ago
3 0

Answer:

metallic

Explanation:

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In a chemical equation, the symbol that takes the place of the words reacts with is an) Example HCI + KOH-KCI + H2O
rodikova [14]
An arrow means a reaction!
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What volume of a 1.0 M HCl is required to completely neutralize 25.0 ml of a 1.0 M KOH?
Karo-lina-s [1.5K]
x 0,025
HCl+KOH--> KCl + H2O
1 1


c=1M
V=25ml=0,025l ( you need the volume to be in l)
c = n/V
n=c*V
n=1*0,025=0,025 m KOH


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3 0
3 years ago
A sample of gas in a closed container at a temperature of 100oC and 3 atm is heated to 300oC. What is the pressure of the gas at
Goshia [24]

Answer:

6.14 atm

Explanation:

Initial temperature (T₁) = 100 °C

Initial pressure (P₁) = 4 atm

Final temperature (T₂) = 300 °C

Final pressure (P₂) =?

NOTE: Volume = constant (since the system is a closed system)

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 100 °C

Initial temperature (T₁) = 100 °C + 273 = 373 K

Final temperature (T₂) = 300 °C

Final temperature (T₂) = 300 °C + 273 = 573 K

Finally, we shall determine the pressure at the highest temperature as follow:

Initial temperature (T₁) = 373 K

Initial pressure (P₁) = 4 atm

Final temperature (T₂) = 573 K

Final pressure (P₂) =?

P₁ / T₁ = P₂ / T₂

4 / 373 = P₂ / 573

Cross multiply

373 × P₂ = 4 × 573

373 × P₂ = 2292

Divide both side by 373

P₂ = 2292 / 373

P₂ = 6.14 atm

Thus, the pressure at the highest temperature is 6.14 atm

6 0
3 years ago
Help me out here I don’t understand please :((((((, ppl srsly answer my questions a week later :/
kow [346]

Answer:

2. For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number.

3. in fact, electron mass is so small that it is not counted in an atom's mass

Explanation:

8 0
3 years ago
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