Perform the following calculation with the

Chemistry

1 answer:

Marina86 [1]3 years ago

7 0

The answer is 15.26.

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I don’t understand the equations

inna [77]

So the equation is balanced, meaning they have the smallest amounts of each element in the reactants to create the products.

So, 2 moles of H2S (the coefficient) contributes to 2 moles Ag2S, which is why the ratio is 2:2.

I hope that made sense.

6 0

3 years ago

How many moles of CO are produced when 1.8 moles C reacts?

olasank [31]

Answer:

1.44mole of CO

Explanation:

The reaction equation is given as:

5C + 2SO₂ → CS₂ + 4CO

We check to see if the expression is balanced and it is so;

Now;

Given;

1.8mole of C reacted; how many moles of CO are produced;

From the balanced reaction equation:

5 mole of C is expected to produce 4 mole of CO

1.8 mole of C will then produce $\frac{4 x 1.8}{5}$ = 1.44mole of CO

3 0

3 years ago

How many joules of heat are needed to raise the temperature of 47.5 g of aluminum from 21°C to 94°C , if the specific heat of al

Montano1993 [528]

Answer:

3120.75J

Explanation:

So, we have the formula $q = mc\Delta t$ . For this example, q is the heat energy in Joules, m is the mass in grams, c is the specific heat capacity in $\frac{J}{{g\°C}}$ , and $\Delta$ t is the change in temperature. In this case, m = 47.5g, c = 0.9 $\frac{J}{{g\°C}}$ , and $\Delta$ t = 94-21 = 73°C. Plugging in the values, we get the joules of heat required to raise 47.5g of Al from 21°C to 94°C which is stated above. You can double check my answer but that should be it. An important thing to be aware of are the units. Sometimes, the heat capacity may not be $\frac{J}{{g\°C}}$ . I may be in Kelvin or something. Anyways, hope this helps.