Which of the following is true regarding mass relationships in a chemical reaction?
A) To determine mass relationships in a chemical reaction, you first need to know the balanced chemical equation for the reaction.
B) To convert from grams to moles and vice versa, you need to use Avogadro's number as a conversion factor.
C) Both a and b are true.
D) Both a and b are false.
A
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You live in the central Indian city of Nagpur, located in the geographic center of India. Briefly describe the climatic differences in Nagpur for the months of January and July.
What will be an ideal response?
How old are fossils that indicate the first life forms on Earth?
A) Between 1.2 and 1.5 billion years old B) Between 2.6 and 2.7 billion years old C) Between 3.4 and 3.5 billion years old D) Between 4 and 4.2 billion years old
As an object cools, the wavelengths of its maximum radiation shorten
Indicate whether the statement is true or false
Travelers flying west from Los Angeles (118° W) to Tokyo (139° E) will cross the ________ and, as a result, they will ________ when crossing this meridian
A) International Dateline; gain a day (Example: Sunday becomes Saturday.) B) International Dateline; lose a day (Example: Saturday becomes Sunday.) C) prime meridian; gain a day (Example: Sunday becomes Saturday.) D) prime meridian; lose a day (Example: Saturday becomes Sunday.)