In what ways does human activity affect the carbon cycle?
A gas of unknown identity diffuses at a rate of 83.3 mL/s in a diffusion apparatus in which carbon dioxide diffuses at the rate of 102 mL/s. Calculate the molecular mass of the unknown gas. Give your answers in units of g/mol to three significant figures.
Answer: Option (c) is the correct answer. Explanation: Atomic number means the number of protons present in an element. Whereas atomic mass means the sum of total number of protons and neutrons present in an element. Also, it is known that when an atom is neutral then its number of protons equal number of electrons.
What causes the difference in bond angles in carbon dioxide and water? A) the distance between the atomsin either molecules B) the facr that there are tei oxygen atoms in carbon dioxide and only one in water C) the fact that the number of lone pairs of electrons on the central atom is greater in the case of water D) the presence of a carbon atom in carbon dioxide E) the presence of a hydrogen atom in water
Answer is: C) the fact that the number of lone pairs of electrons on the central atom is greater in the case of water. Carbon(IV) oxide is nonpolar because CO₂ is linear molecule and the oxygen atoms are symmetrical (bond angles 180°). Water is polar because of the bent shape of the molecule. Oxygen atom
Which of the following are examples of the effects of living things on the atmosphere and climate? outgassing of volcanoes the buildup of oxygen in the atmosphere mass extinctions changes in levels of carbon dioxide
The right answer is C. ATP is a key molecule of cellular energy Living beings derive their energy from the oxidation of nutrients, and this is true even for chlorophyllous plants (which use the energy of photons to make organic matter that can be oxidized later). However, the energy released during this oxidation is not...
One difference between carbohydrates and lipids is that A) Lipids will dissolve in water but not carbohydrates. B) Carbohydrates will dissolve in water but not lipids. C) Carbohydrates contain hydrogen, carbon, and oxygen and lipids do not. D) Lipids contain hydrogen, carbon, and oxygen and carbohydrates do not.
Answer: B) Fronts, air masses When the air masses meet fronts are formed. These fronts reflects the weather condition of a region. Cold front forms when a cold air mass slides under a warm air mass, resulting in the warm air mass to rise above. This is responsible for cold weather conditions. Warm
According to the following reaction, how many moles of carbon dioxide will be formed upon the complete reaction of 22.7 grams of benzene (C6H6) with excess oxygen gas?
You would have to use the ideal gas law: PV = nRT where, P = pressure V = volume n = molesR = universal gas constant for a specific pressure (in this case it’s 62.364 torr)T = temperature in Kelvin First, convert Celsius to kelvin by adding 273 to 25, which gives you 298K Now
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 21.6 g of carbon were burned in the presence of 72.3 g of oxygen, 14.7 g of oxygen remained unreacted. What mass of carbon dioxide was produced?
Answer: Neon Explanation: Elements are arranged in a certain order in a table known as the periodic table of elements, and they are arranged in groups and periods with similar properties to each other. Earlier in history when Dmitri Medeleev created the first periodic table, some spaces were left open because many elements...