Answer:
Baking soda mixed with Vinegar
Explanation:
This is a chemical reaction that I have seen in my daily life. Vinegar is acidic while baking soda is a base. The 2 mix together to form carbonic acid and sodium acetate from sodium and bicarbonate ions.
Question one should be obvious..
Mass can't be created not destroyed no matter what, so even in a chemical reaction, the answer will remain. The first answer is correct.
Question two
No, because even when water is broken down, there should only be one molecule of oxygen. The fact there is two means it's incorrect.
Question three
Yes. The equation is perfectly balanced on both sides, so it's safe to say the value of mass remains constant.
Answer:
Number of molecules = 2.61 x 10²³
Explanation:
Given:
Volume of tetra-chloride = 42 ml
Density = 1.59 g/ml
Find:
Number of molecules
Computation:
Mass = Volume of tetra-chloride x Density
Mass = 42 x 1.59
Mass = 66.78
Molecular mass of tetra-chloride = 154 g/mol
Moles = 66.78 / 154
Moles = 0.4337
0.4337 mole = 0.4337 x Avogadro number
0.4337 mole = 0.4337 x 6.022 x 10²³
Number of molecules = 2.61 x 10²³
The correct answer is option D. i.e. <span>pressure, temperature, or concentration.
Equilibrium reactions can involve
1) changes in the temperature conditions - high or low or exothermic or endothermic.
2) Pressure - By increasing or decreasing the pressure
3) Concentration - the changes in concentration take place in either products side or reactants side.
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I'm pretty sure the formula is 2n(/\) 2
