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Thepotemich [5.8K]
3 years ago
11

The spines of a cactus protect it from animals.

Chemistry
1 answer:
alisha [4.7K]3 years ago
7 0
That would be true. 

Is there any more? I will continue to answer. (:

Lovely day!
You might be interested in
In the electron transport system, hydrogen atoms removed from NADH ultimately end up as part of _____
erica [24]

Answer: Water H2O

Explanation:

In cellular respiration process NAD+ is a most versatile electron acceptor and functions in several of the redox steps during break down of glucose.

Each NADH molecules formed during respiration represents stored energy that can be tapped to make ATP when the electrons complete their ''fall''down an energy gradient from NADH to oxygen.

Electrons removed from glucose are shuttle by NADH to the ''top'', higher-energy end of the electron transport chain. At the ''bottom'' lower energy end, O2 captures these electrons along with H+ forming water.

Therefore Hydrogen removed from NADH in the ETC is captured by O2 to form water

2H + 1/2O2 ------> H20

5 0
4 years ago
Please help me on this exsam question ASAP!!! Please
vlada-n [284]



Well insulated houses use less energy to keep them warm. This means that less carbon dioxide, a greenhouse gas, is released into the atmosphere from burning of fossil fuels (coal, oil and gas) in our power stations and central heating boilers. Global warming is occurring because large volumes of greenhouse gases – including carbon dioxide – are accumulating in the Earth’s atmosphere. This causes the planet’s average air and ocean temperatures to increase and sea levels to rise, resulting in increasingly severe weather conditions. This effect is called climate change and it’s already happening. By improving the insulation of your home, you will be playing your part in reducing the effect of global warming.
5 0
3 years ago
Glucose has formula C6 H12 O6.
Leni [432]
The answer is 6.0•1022
6 0
3 years ago
Read 2 more answers
A reaction that is essentially the opposite of a synthesis reaction describes which of the following?
Afina-wow [57]

Answer is: b) decomposition.

Synthesis is reaction of two or more substances combining to make a more complex substance.

Decomposition is reaction where one substance is broken down into two or more simpler substances.

For example, balanced chemical reactio:

CaCO₃(s) → CaO(s) + CO₂(g).

Chemical decomposition is the separation of a single chemical compound (in this example calcium carbonate) into its two or more simpler compounds (in this example calcium oxide and carbon dioxide).

Combustion is reaction with oxygen.

Single Displacement is reaction where  neutral element metal or nonmetal become an ion as it replaces another ion in a compound.  

Double displacement reactions (more reactive metals displace metals with lower reactivity).

3 0
4 years ago
The halpy of vaporization of H2O at 1 atm and 100 C is 2259 kJ/kg. The heat capacity of liquid water is 4.19 kJ/kg.C, and the he
Naddik [55]

Answer: Option (a) is the correct answer.

Explanation:

The given data is as follows.

        C_{p}_{liquid} = 4.19 kJ/kg ^{o}C

        C_{p}_{vaporization} = 1.9 kJ/kg ^{o}C

Heat of vaporization (\DeltaH^{o}_{vap}) at 1 atm and 100^{o}C is 2259 kJ/kg

        H^{o}_{liquid} = 0

Therefore, calculate the enthalpy of water vapor at 1 atm and 100^{o}C as follows.

            H^{o}_{vap} = H^{o}_{liquid} + \DeltaH^{o}_{vap}        

                                   = 0 + 2259 kJ/kg

                                   = 2259 kJ/kg

As the desired temperature is given 179.9^{o}C and effect of pressure is not considered. Hence, enthalpy of liquid water at 10 bar and 179.9^{o}C is calculated as follows.

             H^{D}_{liq} = H^{o}_{liquid} + C_{p}_{liquid}(T_{D} - T_{o})

                             = 0 + 4.19 kJ/kg ^{o}C \times (179.9^{o}C - 100^{o}C)

                              = 334.781 kJ/kg

Hence, enthalpy of water vapor at 10 bar and 179.9^{o}C is calculated as follows.

               H^{D}_{vap} = H^{o}_{vap} + C_{p}_{vap} \times (T_{D} - T_{o})

             H^{D}_{vap} = 2259 kJ/kg + 1.9 \times (179.9 - 100)            

                              = 2410.81 kJ/kg

Therefore, calculate the latent heat of vaporization at 10 bar and 179.9^{o}C as follows.

       \Delta H^{D}_{vap} = H^{D}_{vap} - H^{D}_{liq}              

                         = 2410.81 kJ/kg - 334.781 kJ/kg

                         = 2076.029 kJ/kg

or,                      = 2076 kJ/kg

Thus, we can conclude that at 10 bar and 179.9^{o}C latent heat of vaporization is 2076 kJ/kg.

3 0
4 years ago
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