How many atoms of hydrogen are in one molecule of Al(H2PO4)3?
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How many significant figures are in the number 0.00100420?
How many significant figures are in the number 0.00100420?
Which response includes all of the following that are exampl…
Which response includes all of the following that are examples of homogeneous matter, and none that are examples of heterogeneous matter? a. a pure gold chain b. mouthwash c. Italian salad dressing (oil and water) d. chunky peanut butter e. a chocolate chip cookie
How many protons, neutrons and electrons are there in a neut…
How many protons, neutrons and electrons are there in a neutral atom of phosphorus-28? [protons], [neutrons], [electrons]
What is the mass number of an atom that contains 83 protons,…
What is the mass number of an atom that contains 83 protons, 131 neutrons, and 83 electrons? [massnumber] What is the symbol for the element? [symbol]
What is the mass number of an atom that contains 39 protons,…
What is the mass number of an atom that contains 39 protons, 51 neutrons, and 39 electrons? [massnumber] What is the symbol for the element? [symbol]
After the age of 65, the recommended daily intake of calcium…
After the age of 65, the recommended daily intake of calcium is 1500 mg. If a person takes in 1125 mg/day, what percent of the recommended daily intake is the person receiving?
How many protons, neutrons and electrons are there in a neut…
How many protons, neutrons and electrons are there in a neutral atom of magnesium-25? [protons], [neutrons], [electrons]
What is the mass number of an atom that contains 26 protons,…
What is the mass number of an atom that contains 26 protons, 29 neutrons, and 26 electrons? [massnumber] What is the symbol for the element? [symbol]
You must use the factor-unit method to solve the following p…
You must use the factor-unit method to solve the following problem. Show your work (conversion factors and units) by using the equation editor() in the toolbar. Within the equation editor, use for conversion factors. Or, show your work (conversion factors and units) on a separate sheet of paper. Immediately after submitting your exam, upload a picture of your work into the Unit 1 Exam Pictures dropbox. Be sure to number your problems and circle your final answer. A copy of your chemistry textbook is found to have a mass of 2.56×103 g. What is this copy of your chemistry textbook is in kg? (1000 g = 1 kg)