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Chemistry

2 answers:

aleksandr82 [10.1K]3 years ago

5 0

Exactly what the other guy said except its in kJ on k12. So 0.33 kJ

xz_007 [3.2K]3 years ago

3 0

The enthalpy of fusion of the ice is 334 J/g. .... When ice at 0°C melts to liquid water at 0°C, it absorbs0.334 kJ of heat per gram. ... A 2 kg block of ice is placed in a container at 0 °C. How much energy is required to completely melt the block of ice? ... A 40.0 g block of ice at -15 degrees C is dropped into acalorimeter

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What does buffer do?? (Chemistry)

pogonyaev

A buffer is a solution that can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable. This is important for processes and/or reactions which require specific and stable pH ranges. Buffer solutions have a working pH range and capacity which dictate how much acid/base can be neutralized before pH changes, and the amount by which it will change.

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2 years ago

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Net ionic equation for Barium chloride

vaieri [72.5K]

Answer: There is one way to write it but i’ll also provide an unbalanced equation and a balanced one.

Explanation:

Unbalanced : Ba (aq) + Cl2 (aq)—-> BaCl (aq)

Balanced : 2Ba (aq) + Cl2 (aq)—> 2BaCl(aq)

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2 years ago

How many moles of mercury, Hg, are there in 1.30 x 10^7 atoms of murcury? PLEASE HELP, IT'S URGENT! Thank you! (:

vodka [1.7K]

1 mole Hg ---------------- 6.02x10²³ atoms
?? ------------------------- 1.30 x10⁷ atoms

1.30x10⁷ x 1 / 6.02x10²³ =

= 1.30x10⁷ / 6.02x10²³ => 2.159x10⁻¹⁷ moles

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3 years ago

You are making lemonade and the calls for 6 cups Lemon juice (L), 3 Cups of sugar (S) and 5 cups of water (W) to make 12 Cups of

vova2212 [387]

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Explanation:

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2 years ago

the pressure in a sealed plastic container is 108 kPa at 41 degrees Celsius. What is the pressure when the temperature drops to

Katarina [22]

Answer: The new pressure will be 101.46 kPa.

Explanation:

To calculate the new pressure, we use the equation given by Gay-Lussac Law. This law states that pressure is directly proportional to the temperature of the gas at constant volume.

The equation given by this law is:

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$