Scientists and engineers are working to develop ways to replace corn with a different plant, such as switchgrass, in the production of ethanol. this is largely because using corn to produce ethanol could cause a problem for society. which of the following statements best describes this problem? a. chemical processes do not exist that can transform corn's sugars into ethanol. b. grass resources are scarce and could be used up if harvested to produce ethanol. c. harvesting corn for ethanol could come into conflict with harvesting corn for food. d. chemical processes do not exist that can release the chemical energy in ethanol.

C

Explanation:

Using corn to produce ethanol will significantly reduce the amount of corn, available for the food industry. Note, that corn is used not only as a food for people, but also as a good source of energy for the animals due to its high productivity. As the amount of the farming soil is limited and the humanity is facing the lack of the food already, utilizing the corn to make ethanol, specially in high volumes, will have further negative impact on the starving people. In addition, note, that ethanol will be used by rich people, who already have good access to the food, so low income society will face further issues.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.