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iVinArrow [24]
3 years ago
6

Will mark brainlist need help

Chemistry
1 answer:
Stella [2.4K]3 years ago
4 0

Answer:

0.219 mol HCI

Explanation:

Iron(II) sulfide reacts with hydrochloric acid according to the reaction:

FeS (s) + 2HCl (aq) → FeCl2 (s) + H2S (g)

A reaction mixture initially contains 0.223 mol FeS and 0.665 mol HCl.

Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains?

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Saturn has a diameter of 74,898 miles. What is its diameter in kilometers? (1
Alex777 [14]

Answer:

119836.8 km

Explanation:

  74 898 miles *  1.6 km / mile = 119836.8 km

4 0
2 years ago
I’m struggling with dimensional analysis in chemistry! Will someone please help me with .74 Kcal/min to cal/sec ? Explain and gi
valina [46]

Answer:

            12.33 cal/sec

Explanation:

As we know,

                          1 Kcal  =  1000 cal

So,

                     0.74 Kcal  =  X cal

Solving for X,

                      X =  (0.74 Kcal × 1000 cal) ÷ 1 Kcal

                      X =  740 cal

Also we know that,

                      1 Minute  =  60 Seconds

Therefore, in order to derive cal/sec unit replace 0.74 Kcal by 740 cal and 1 min by 60 sec in given unit as,

                                       = 740 cal / 60 sec

                                       = 12.33 cal/sec

3 0
3 years ago
5/3 * 2/3 what's the answer
Contact [7]
5 x 2 = 10

3 x 3 = 9

10/9, or 1 1/9 is your answer

hope this helps
6 0
3 years ago
Explain whether nitrogen atoms will form bonds with other atoms.
Stells [14]
Nitrogen  can make   bonds with other atoms.. Typically though it only makes 3 bonds, so it fills its octet.
4 0
3 years ago
Element Molar Mass (g/mol)
artcher [175]

The number of moles of ethanol the chemist will use in the experiment involving 30g of ethanol is 0.65moles.

<h3>How to calculate number of moles?</h3>

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass. That is;

no. of moles = mass ÷ molar mass

According to this question, a chemist will use a sample of 30 g of ethanol (CH3CH2OH) in an experiment. The number of moles can be calculated as follows:

Molar mass of ethanol = 12(2) + 1(5) + 17 = 46g/mol

no of moles = 30g ÷ 46g/mol

no. of moles = 0.65moles

Therefore, the number of moles of ethanol the chemist will use in the experiment involving 30g of ethanol is 0.65moles.

Learn more about moles at: brainly.com/question/1458253

6 0
2 years ago
Read 2 more answers
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