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Vaselesa [24]
3 years ago
9

Is holding an ice cube on your hand a chemical change?

Chemistry
1 answer:
Strike441 [17]3 years ago
7 0
Yes. its a chemichal change.
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The neutrons of an atom have ______ charges and are located ____ the nucleus
djyliett [7]
Neutral charges and are found in the center? I'm not sure for the last answer
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Provide two arguments on why you don't notice the land moving beneath you, defend your answer.​
AnnyKZ [126]

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The reference point is the ground.

Explanation:

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A mineral consisted of 29.4% calcium, 23.5% sulfur and 47.1% oxygen. What is the empirical formula?
inessss [21]
Step  one  calculate  the  moles  of  each  element
that  is  moles= %  composition/molar  mass
molar  mass  of    Ca  =  40g/mol,     S=  32  g/mol ,   O=  16 g/mol

moles  of      Ca = 29.4 /40g/mol=0.735 moles,      S= 23.5/32  =0.734 moles,  O= 47.1/16= 2.94   moles

calculate  the mole  ratio  by  dividing   each  mole with  smallest  mole   that   is  0.734
Ca=  0.735/0.734= 1,      S=  0.734/0.734 =1,   O  = 2.94/  0.734= 4
therefore  the  emipical  formula  =  CaSO4
5 0
3 years ago
Which particles have a similar relative mass
olganol [36]

Answer:

c ) protons and neutrons

Explanation:

Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron). The positive charge on a proton is equal in magnitude to the negative charge on an electron.

7 0
3 years ago
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