Chemistry, 19.11.2020 21:00 elijahchloesunshine
An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this element?
OA. 10
OB. 20
Ос.
30
OD
0
O E
200
Answers: 1
Chemistry, 21.06.2019 15:00
Litmus paper is made from water-soluble dyes which are extracted from lichens. this paper is used as an acid-base indicator. which of these common household substances would turn blue litmus paper red? a) bleach b) lye c) soap d) vinegar
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Chemistry, 22.06.2019 14:30
100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)
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Chemistry, 22.06.2019 20:30
How many grams of phosphorus are contained in 5.09 moles of phosphorus?
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An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this...
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