All categories

3 years ago

WILL MARK BRAINLIEST !! HELP ASAP

Chemistry

2 answers:

andre [41]3 years ago

6 0

I am almost positive that the answer is D

ra1l [238]3 years ago

6 0

Answer : The correct option is, (B) Cellular respiration in humans

Explanation :

Combustion reaction : It is defined as the hydrocarbon react with the oxygen then it react to give carbon dioxide and water as a product.

A. Photosynthesis in plants

Photosynthesis : It is a chemical process or a reaction which takes place in the green plants or the living organisms.

During this process, the carbon dioxide reacts with the water in the presence of sunlight to gives glucose and oxygen as a product.

The balanced chemical reaction will be,

$6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+6O_2$

B. Cellular respiration in humans

Cellular respiration : In this process, the hydrocarbon react with the oxygen to give carbon dioxide and water as a product. This reaction is a combustion reaction.

Cellular respiration is directly opposite of photosynthesis.

The balanced chemical reaction will be,

$C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O$

C. Mixing of vinegar and baking soda

When vinegar is react with baking soda then it gives sodium acetate, carbon dioxide and water as a product. This reaction is an acid-base reaction.

The balanced chemical reaction will be,

$CH_3COOH+NaHCO_3\rightarrow CH_3COONa+H_2O+CO_2$

D. Release of carbon dioxide on heating limestone

When limestone (calcium carbonate) is heated then it decomposes to give calcium oxide and carbon dioxide as a product. This reaction is a decomposition reaction.

The balanced chemical reaction will be,

$CaCO_3\rightarrow CaO+CO_2$

Hence, from this we conclude that the example of combustion reaction is, (B) Cellular respiration in humans

You might be interested in

What element has a shorthand configuration of [He]2s^22p^1

nlexa [21]

Boron

You start at He and work you way down

3 0

4 years ago

When a sulfur atom gains its valence electrons to have 8, the charge on the resulting ion is

nikklg [1K]

<span>When a sulfur atom gains its valence electrons to have 8, the charge on the resulting ion is stable since sulfur atom achieved the octet rule. An octet rule is the filling of 8 electrons in an atom.</span>

8 0

4 years ago

I’m putting 50 points into this I need help badly bro

KIM [24]

1. P = F/A; weight is a force (the force of gravity on an object), so divide the weight by the area given. P = 768 pounds/75.0 in² = 10.2 pounds/in².

2. Using the same equation from question 1, rearrange it to solve for A: A = F/P. We're given the force (the weight) and the pressure, so A = 125 pounds/3.25 pounds/in² = 38.5 in².

3. Again, using the same equation from question 1, rearrange it this time to solve for F: F = PA = (4.33 pounds/in²)(35.6 in²) = 154 pounds.

4. We can set up a proportion given that 14.7 PSI = 101 KPa. This ratio should hold for 23.6 PSI. In other words, 14.7/101 = 23.6/x; to solve for x, which would be your answer, we compute 23.6 PSI × 101 kPa ÷ 14.7 PSI = 162 kPa.

5. We are told that 1.00 atm = 760. mmHg, and we want to know how many atm are equal to 854 mmHg. As we did with question 4, we set up a proportion: 1/760. = x/854, and solve for x. 854 mmHg × 1.00 atm ÷ 760. mmHg = 1.12 atm.

6. The total pressure of the three gases in this container is just the sum of the partial pressures of each individual gas. Since our answer must be given in PSI, we should convert all our partial pressures that are not given in PSI into PSI for the sake of convenience. Fortunately, we only need to do that for one of the gases: oxygen, whose partial pressure is given as 324 mmHg. Given that 14.7 PSI = 760. mmHg, we can set up a proportion to find the partial pressure of oxygen gas in PSI: 14.7/760. = x/324; solving for x gives us 6.27 PSI oxygen. Now, we add up the partial pressures of all the gases: 11.2 PSI nitrogen + 6.27 PSI oxygen + 4.27 PSI carbon dioxide = 21.7 PSI, which is our total pressure.

7 0

3 years ago

If 35.4 liters of hydrogen gas are used, how many liters of nitrogen gas will be needed for the above reaction at STP?

CaHeK987 [17]

Answer:

ujdbdbfbf fbFbsygtsjysnsgndhngsnsgnafbfa

5 0

3 years ago

How many electrons are in the highest occupied energy level of these atoms?

Yuliya22 [10]

Excuse me not giving an explanation; I haven't even learned chemistry before. I usually give explanations for math/english.

I think it would be for flourine: 7
aluminum: 8
can't help with the rest...
sorry!

8 0

4 years ago