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Rufina [12.5K]
2 years ago
8

Help pls!!!!!!!!!!!!!​

Chemistry
1 answer:
UkoKoshka [18]2 years ago
4 0

Answer:

1.   C + O₂ → CO₂

2.  C + CO₂ → 2 CO

3. Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

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A pure gold bar is made up of only particles. <br><br>A.nickel<br>B.copper <br>C.god<br>D.gold​
Minchanka [31]

Answer: gold

Explanation:

4 0
3 years ago
If 26.2 mL of AgNO3 is needed to precipitate all the Cl− ions in a 0.785-mg sample of KCl (forming AgCl), what is the molarity o
sweet-ann [11.9K]

<u>Answer:</u>

<em>The molarity of the AgNO_3 solution is 4.02 \times 10^4 M </em>

<em></em>

<u>Explanation:</u>

The Balanced chemical equation is

1AgNO_3 (aq) +1KCl (aq) > 1 AgCl (s)+1KNO_3 (aq)

Mole ratio of AgNO_3 : KCl is 1 : 1

So moles AgNO_3  = moles KCl

Moles KCl = \frac {mass}{molarmass}

= \frac {0.785 mg}{(39.1+35.5 g per mol)}

= \frac {0.000785 g}{74.6 g  per mol}

= 0. 0000105 mol KCl

= 0.0000105 mol AgNO_3

So  Molarity

= \frac {moles of solute}{(volume of solution in L)}

= \frac {0.0000105 mol}{26.2 mL}

=\frac {0.0000105 mol}{0.0262 L}

= 0.000402M or mol/L is the Answer

(Or) 4.02 \times 10^4 M is the Answer

6 0
3 years ago
Calculate the molar concentration of the Cl⁻ ions in 0.65 M CaCl2(aq), assuming that the dissolved substance dissociates complet
alexandr1967 [171]
The question here is solved using basic chemistry. CaCl2(aq) is an ionic compound which will have the releasing of 2 Cl⁻ ions ions in water for every molecule of CaCl2 that dissolves.
CaCl2(s) --> Ca+(aq) + 2 Cl⁻(aq)
            [Cl⁻] = 0.65 mol CaCl2/1L × 2 mol Cl⁻ / 1 mol CaCl2 = 1.3 M
The answer to this question is [Cl⁻] = 1.3 M
5 0
4 years ago
How do you write out and balance calcium hydroxide reacts with hydrogen chloride to produce calcium chloride and water
Temka [501]

Answer:

 Ca(OH)₂ + 2HCl →  CaCl₂ +  2H₂O

Explanation:

Reactants;

     Calcium hydroxide = Ca(OH)₂

     Hydrogen chloride  = HCl

 Products;

       Calcium chloride  = CaCl₂

        Water  = H₂O

The reaction equation:

           Ca(OH)₂ + 2HCl →  CaCl₂ +  2H₂O

The reaction is a neutralization reaction where acids reacts with bases to produce salt and water only.

5 0
3 years ago
Which of the following series of scientific steps is most likely in the correct order?
Leni [432]
Observation, hypothesis, experiment is the correct answer
4 0
3 years ago
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