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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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Determine whether the variable is qualitative or quantitative. grams of carbohydrates in a donut. grams of carbohydrates in a do
Sophie [7]
You would know that the variable is quantitative if it shows any number to express the quantity. For example, quantitative variables are 50°C, 5 atm, 2 moles, 100 L and so on. A variable is qualitative if it expresses a relative quantity but not expressing a number. Examples would be: few, too hot, several, or even describing the characteristics of a variable. Hence, when the variable is in grams, then that would be quantitative.
4 0
3 years ago
How much carbon would be needed to make 8.8g of carbon dioxide?<br>​
PIT_PIT [208]
The calculation for such a question can be achieved via Avogadro hypothesis

We know molar mass of CO2 is 44g/mole which is the sum of atomic masses i.e; C and 2 oxygen atoms

Molar mass of CO2 =12(C)+2*16(O) = 44 g/mole will contain 6.023 ※10^23 CO2 molecules ..

44g/mole = 6.023 ※10^23 CO2 molecules

=> 1g = (6.023/44) ※10^23 CO2 molecules

==> 8.80g = 8.80(6.023÷44)10^23 = 1.2046 ※10^23 molecules of CO2….

Thus there r 1.2046 ※10^23 molecules of CO2 in 8.80g

if u need to calculate no. of carbon atoms then multiply result by 1 and if u need no of oxygen atoms in 8.80g of co2 then multiply the result by 2 ….
7 0
2 years ago
Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of 0.0089 M.s^-1:
masya89 [10]

Answer:

Explanation:

The rate of reaction will not depend upon concentration of reactant . It will be always constant and equal to .0089M s⁻¹.

Initial moles of reactant = 400 x 10⁻³ mole in 5 L

molarity = 400 x 10⁻³ /5 M

= 80 x 10⁻³ M .

= .08M

no of moles reacted in 2 s  = .0089 x 2

= .0178 M

concentration left = .08 - .0178 M

= .0622 M .

No of moles left in 5 L

= 5 x .0622 = .31 moles .

5 0
3 years ago
Which of the following phases occur at point B on the phase diagram shown below
leonid [27]

Answer:

C. freezing

Explanation:

Point B is right at the border between a solid and a liquid so you can have two physical changes:

a) solid is <u>meting</u> to transform into a liquid

or

b) liquid is <u>freezing</u> to transform into a solid (C)

If you are on the border between a solid and a gas you have the following physical changes:

solid to gas - sublimation

gas to solid - deposition

If you are on the border between a liquid and a gas you have the following physical changes:

liquid to gas - boiling

gas to liquid - condensation

8 0
3 years ago
Which hypothesis led to the discovery of the proton?
Viefleur [7K]
When a neutral hydrogen atom loses an electron a positively charged particle should remain. A proton is a subatomic particle, symbol p+, with a positive charge of +1e elementary charge and mass slightly less than that of a neutron.
Ernest Rutherford discovered that the atom must have a concentrated positive center charge that contains most of the atom's mass. He suggested that the nucleus contained a particle with a positive charge the proton. 
8 0
3 years ago
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