Other Chemistry Answers

The specific heat capacity of water is 4.18 J/(g °C). In a cup, 100 grams of water was put in the microwave to heat it from a temperature of 25 °C, to right at boiling temperature. What is the enthalpy of this water?

62.6 g of an unknown metal is found to release -827.3 J of energy while its temperature decreases from 132.9 °C to 36.7 °C. What is the specific heat of this metal? Use 3 decimal places.

A shard of metal releases 244.1 J of heat while cooling 57.1°C. What is the mass of the sample if it has a specific heat of 0.240 J/g°C? Use 1 decimal place.

Calculate the potential of a zinc electrode immersed in 0.0200 M in NaOH and saturated with
Zn(OH)2 (E0=Zn2+ / Zn: -0.763 V, Ksp: 3×10-16)

If a flexible container has an internal volume of 409 liters and gets heated from 92K to 19K what will the final pressure be in atmospheres (atm)? The initial pressure is 33 atm, and the final volume is 472 liters. Round your answer to the nearest whole number.

2. What is the pressure in atm of 1.35 x 102 mole of oxygen gas (O2) if it is compressed in a tube with 8000 mL at 20C?

What metal was produced in the reaction?

How many grams of water in a cup that requires 4,500J to heat from 20C to 40C?

How many grams of water in a cup that requires 4,500J to heat from 20C to 40C?

For the following reaction, what is the percentage yield of magnesium nitride if 1.70 g of it are produced when 1.36 g of Mg reacts with 0.695 g of N2? (10 pts)
3Mg + N2 —> Mg3N2