How many grams should product A have?

Calculate the molar mass of iron(III) sulfide. Round your answer to the nearest 0.1 and include units to receive credit.

Igoryamba

Answer:

207.89g

Explanation:

The formula of the compound is:

Fe₂S₃

Find the molar mass of the compound;

Atomic mass of Fe = 55.845g/mol

S = 32.065g/mol

Now;

Molar mass of Fe₂S₃ = 2 (55.845) + 3 (32.065)

= 207.89g

8 0

3 years ago

These organs make urine by removing waste and water from the blood. What organs are shown in the picturehese organs make urine b

Orlov [11]

Answer:

kidneys i think

Explanation:

because

3 0

3 years ago

Asap please

MissTica

Answer:

When $\Delta H^o < 0$ and $\Delta S^o > 0$

Explanation:

The spontaneity of a reaction can be determined by the sign of the Gibbs free energy change. For a spontaneous reaction, the change in Gibbs free energy should be negative, meaning:

$\Delta G^o = \Delta H^o - T\Delta S^o < 0$

Since the temperature value here corresponds to the absolute temperature, this implies that T > 0 for any T. Therefore, to have a negative difference for any temperature value, the first term, the change in enthalpy, should be negative and the change in entropy should be positive, so that we always subtract a positive number from a negative number. This corresponds to a negative value in $\Delta G^o$ .

6 0

4 years ago

What are the three hypotheses that were proposed to explain the seismic activity of Pinatubo? What process generates sulfur diox

ASHA 777 [7]

Answer:

Mt. Pinatubo is one of the contrasting volcanoes that erupted violently in the year 1991, being the second strongest volcanic eruption that took place on earth in this entire century.

The 3 hypothesis that was proposed in order to describe the seismic activity of Pinatubo includes-

The magma rising upward to the surface from the interior of the earth, erupting through the crater of the volcano.

The eruption led to the releasing of a large number of volcanic gases into the atmosphere.

The earthquakes are produced due to the continuous tectonic activities that are primarily caused when the earth's crust moves over the layer of viscous asthenosphere.

A large number of volcanic gases are released such as sulfur dioxide (SO₂), methane (CH₄), Hydrogen sulfide (H₂O), Carbon monoxide (CO), and other gases, due to the formation of convection currents and rising up of magma from the mantle, creating volcanic eruptions at the surface

6 0

3 years ago

A cup holding 125.12g of water has an initial temperature of 26.8 degrees C. After a 35.08g piece of metal, at 99.5 degrees C, i

nignag [31]

<h3>Answer:</h3>

0.620 J/g°C

<h3>Explanation:</h3>

Heat gained or absorbed, Q by a substance is calculated by;

Q = mass × specific heat capacity × Change in temperature

In this case we are given;

Mass of water = 125.12 g
Initial temperature of water = 26.8 °C
Initial temperature of the metal = 99.5°C
Final temperature of the mixture = 29.7 °C

We are required to calculate the specific heat capacity of the metal;

<h3>Step 1 : Heat absorbed by water </h3>

Specific heat capacity of water = 4.184 J/g°C

Temperature change of water = 29.7 °C - 26.8°C

= 2.9 °C

But, Q = m×c×ΔT

Thus, Heat = 125.12 g × 2.9°C × 4.184 J/g°C

= 1518.156 Joules

<h3>Step 2; Heat lost by the metal </h3>

Specific heat capacity of the metal = x J/g°C

Temperature change of the metal = 29.7 °C - 99.5°C

= -69.8 °C

But, Q = mcΔT

Therefore;

Heat lost by the meatl = 35.08 g × x J/g°C × 69.8 °C

= 2.448.584x Joules

<h3>Step 3: C;aculating the specific heat capacity of the metal </h3>

The heat gained by water is equal to the heat lost by the metal

Therefore;

1518.156 Joules = 2.448.584x Joules

x = 1518.156 J ÷ 2.448.584 J

= 0.620 J/g°C

Therefore, the specific heat of the metal is 0.620 J/g°C

8 0

4 years ago