Chemistry, 18.03.2021 21:00, calebabaltimore
Hello, I need some help, please. balance these equations by writing the proper coefficients in the blanks provided.
1. Mg + O2 --> MgO
2. P + O2 --> P2O5
3. S + O2 ---> SO2
4. Na + Cl --> NaCl
5. CaCO3 --> CaO + CO2
thanks :)
Answers: 2
Chemistry, 22.06.2019 04:00, queenkimm26
Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?
Answers: 3
Chemistry, 22.06.2019 08:30, microwave13016
Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size
Answers: 1
Hello, I need some help, please. balance these equations by writing the proper coefficients in the b...
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