Chemistry, 11.05.2021 22:30 cclangston
Select the correct answer. Which of the following is a physical model of the Sun? A. an equation that describes the Sun’s motion B. a chart that lists the temperatures of different parts of the Sun C. a computer program that shows how the Sun changes over time D. a paragraph that describes the Sun’s structure E. a small yellow ball that represents the Sun
Answers: 2
Chemistry, 21.06.2019 17:00
Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).
Answers: 1
Chemistry, 22.06.2019 03:40
Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)
Answers: 3
Chemistry, 22.06.2019 04:30
How much energy is made when a pice of wood burns. how do you know
Answers: 2
Select the correct answer. Which of the following is a physical model of the Sun? A. an equation tha...
English, 01.07.2019 16:00
Mathematics, 01.07.2019 16:00
Geography, 01.07.2019 16:00
Physics, 01.07.2019 16:00
History, 01.07.2019 16:00
Mathematics, 01.07.2019 16:00
Computers and Technology, 01.07.2019 16:00
Chemistry, 01.07.2019 16:00
History, 01.07.2019 16:00