During an investigation, a student determines that a copper sample has a density of 8.10g/mL. What is the student's percent error if the a ccepted density for copper is 8.96g/mL?
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Related Questions
Describe the relationship between Avogadro's number and one mole of any substance.
If you travel from the Earth to the moon, which of the following measurements would change? Mass Weight Density Size
Which of the following solids has the highest melting point?(1) H2O(s) (3) SO2(s)(2) Na2O(s) (4) CO2(s)
During which part of the cell cycle is the duplicated genetic material within the nucleus of a parent cell separated to create two daughter cells?
b. changes to pressure
c. changes to precipitation
d. all of the above
Which of the following is not released by trees into the atmosphere?
a. oxygen
b. water vapor
c. ozone
d. none of the above
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1. Answer is d. all of the above.
Climate can be defined as the data collection of weather conditions of a long period of time in a certain area. The weather conditions that affect to the climate are temperature, precipitation, atmospheric pressure, wind and so on. Any changes in weather can change the global climate.
2. Answer is c. ozone.
Trees release oxygen and water vapor into the atmosphere but not ozone. The oxygen gas is released by trees as the by-product of photosynthesis. This is the natural way of production of oxygen gas. Water vapor can be released due to the transpiration of trees.
1. The correct answer is option D. all of the above.
Global climate change will bring changes in temperature such as heat waves, droughts, volcanic eruption, deforestation, extinction of species due to large shift in temperatures, changes in precipitation such as heavy snowfall, ocean acidification, and ozone depletion.
2. The correct answer is option C, ozone.
Ozone is not released by trees into the atmosphere. Plants have chlorophyll and in the presence of sunlight plants uses sunlight and carbon dioxide to form glucose and oxygen.
6CO₂ + 6H₂O -> C₆H₁₂O₆ + 6O₂
During transpiration plants exhale water vapor through the stomata, tiny pores that are found on the surface of the leaves.
Thus trees never release ozone into the atmosphere.
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Answer:
Lithuim is the smallest
Explanation:
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b. fragile
c. rich in microorganisms
d. a fast developing soil.
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Option B, fragile, is the right answer.
The Permafrost soil (Gelisol) are found very harsh and cold weather such as Arctic and Antarctic. The Gelisol are simply corroded soils, fragile and their finding near the extreme ice covers presents them valuable indicators of the early symbols of global warming. Permafrost in these soils found within two meters of the surface of the soil.
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Mass of a substance = Moles of a substance × molar mass of a substance
We have 0.94 moles of NaHCO3. The molar mass of NaHCO3 is the sum of the atomic masses of the elements comprising NaHCO3, which is approximately 84.007 g/mol.
The mass of 0.94 moles of sodium bicarbonate is therefore (0.94 moles NaHCO3)(84.007 g NaHCO3/mol NaHCO3) = 78.97 ≈ 79 grams of sodium bicarbonate.
b. charge
c. electrons
d. protons and neutrons