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Ne4ueva [31]
3 years ago
8

Which sentence uses the positive form of an adverb?

Chemistry
1 answer:
kenny6666 [7]3 years ago
7 0
The answer is A. Mom carefully bandaged my finger.
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What place is a landscape featured that forms when plate movement forces the crust to bend downward
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The answer is syncline
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If a sodium ion has 11 protons, 12 neutrons, and 11 electrons, what is the atomic mass of the atom?
iragen [17]

Answer:

23

Explanation:

we do not care about electrons, so 11 + 12 = 23

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Ca3(PO4)2 + 2 H2SO4 = 2 CaSO 4 +Ca(H2PO4)2 is this balanced or unbalanced
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Una muestra de 1 gramo de un elemento contiene 1,5 x 1022 atomos, cual es su masa molar❓❓
marusya05 [52]

El número de Avogadro es 6,022 x 10^23, y es el número de átomos que hay en un mol de dicho elemento. A su vez un mol es la cantidad de un elemento cuya masa en gramos coincide con el peso atómico.

Por tanto, 6,022 x 10^23 átomos del elemento tienen una masa en gramos igual a su peso atómico. Hacemos una regla de tres:


1 gramo -------- 1,5 x 10^22 átomos

x ------------------ 6,022 x 10^23 átomos


=> x = 40,1 gramos por mol del elemento.


De modo que su peso atómico es 40,1. Se trata del calcio.


Saludos.

7 0
3 years ago
The mass number of an atom is equal to which of the following?
Phantasy [73]
Mass number is equal to the number of protons plus the number of neutrons in a nucleus of an atom
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2 years ago
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