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lions [1.4K]
3 years ago
11

When vinegar is added to some marble chips ( calcium carbonate) bubbles of gas are observed, what gas is produced and how can it

be identified?
Chemistry
1 answer:
Scrat [10]3 years ago
7 0

Answer:

By passing the gas through lime water

Explanation:

The equation of the reaction of vinegar with  calcium carbonate in the form of marble chips is shown below;

CaCO3(s) + 2CH3COOH(aq) ---------> Ca(CH3COO)2(aq) + H2O(l) + CO2(g).

We can see from the reaction equation that the gas produced is carbon dioxide. This gas is identified by passing the gas through lime water. If lime water turns milky, then the gas is truly carbon dioxide.

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Express the following number in scientific notation: 0.000000675.
tekilochka [14]
There are 7 digits from decimal to 1st digit, and it's coming from right, so exponent will be in negative 7

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Hope this helps!
6 0
4 years ago
Hydrogen gas was collected by water displacement. what was pressure of the h2 collected if the temperature was 26°c?
Vedmedyk [2.9K]
The ideal gas law may be written as
p= \frac{\rho R T}{M}
where
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T = temperature
M = molar mass
R = 8.314 J/(mol-K)

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ρ = 0.09 g/L = 0.09 kg/m³
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Therefore
p= \frac{(0.09 \, kg/m^{3})*(8.314 \, J/(mol-K))*(299 \, K)}{1.008 \times 10^{-3} \, kg/mol} =2.2195 \times 10^{5} \, Pa

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Therefore
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Answer:
2.2195 x 10⁵ Pa (or 221.95 kPa or 2.19 atm)

4 0
3 years ago
Calculate the average obtained from the following weighings of the same object. Do not forget to include formulas, units, and th
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Answer:

10.4376 g

Explanation:

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Then we <u>divide the sum by the number of weighings to calculate the average:</u>

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boron, silicon, germanium, arsenic, antimony, and tellurium

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