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Mazyrski [523]
4 years ago
14

Help please I don’t know the answer

Chemistry
2 answers:
scoray [572]4 years ago
8 0
I think is 3 dude but im not good at this so
Nostrana [21]4 years ago
6 0

The answer is 3 It is a body of knowledge gained using inquiry and experimentation. Hope this helped!

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1. 10.0 g of CaCO 3 ​ on heating gave 4.4 g of CO 2 ​ and 5.6 g of CaO. The observation is in agreement with the law of conserva
finlep [7]

Answer:

  1. According to the law <br> Mass of reactants = mass of product, here <br> `underset(10 g)(CaCO_(3))rarr underset(4.4 g)(CO_(2))+underset(x)(CaO)` <br> Hence, x = 10 g - 4.4 g = 5.6 g <br> Which is mass of CaO.d
  2. In the first compound <br> Hydrogen = 5.93 % <br> Oxygen = `(100-5.93)% = 94.07 %` <br> In the second compound <br> Hydrogen = 11.2 % <br> Oxygen `= (100-11.2)%=88.8%` <br> In the first compound the number of parts by mass of oxygen that combine with one part by mass of hydrogen `=(94.07)/(5.93)=15.86` parts ...
  3. (The ratio of Cu combining with fixed weight of oxygen in black and red oxide is 1 : 2 respectively. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.) {Check something more in the above attachment!}
  4. Refer to the above attachment

Explanation:

<em>Mark </em><em>this </em><em>answer </em><em>as </em><em>brainlest </em><em>answer</em><em>!</em><em>!</em>

5 0
2 years ago
If you were to react 4.3 miles of magnesium phosphide how many moles of potassium would you need?
bixtya [17]

Answer:

25.8

Explanation:

Let's write the reaction between magnesium-phosphide and potassium:

Mg3P2 + K = Mg + K3P

And now let's balance this equation:

Mg3P2+6K=3Mg+2K3P

We see that the ratio of magnesium-phosphide and potassium is 1:6, which means that for every mole of magnesium-phosphide there need to be 6 moles of potassium.

Since we have 4.3 moles of Mg3P2, there need to be 6 • 4.3 = 25.8 moles of potassium.

5 0
3 years ago
Which has more energy: yellow or violet light? And why?
Ilya [14]
This is funny, because last year I did a project on wave lengths, but despite that; Violet light has more energy than yellow light because on the light spectrum, violet has the least wavelengths. This means they carry the most energy.
8 0
3 years ago
ketch the following intermolecular interactions: a.A hydrogen-bonding interaction between thymol and the surface of a silica par
san4es73 [151]

Answer:

answer is attached

5 0
3 years ago
Will a deflated football sink in water?
Leno4ka [110]

Answer:

no

Explanation:

light objects float

4 0
3 years ago
Read 2 more answers
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