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Vaselesa [24]
3 years ago
14

What units are used to express energy transfer?

Chemistry
2 answers:
Lubov Fominskaja [6]3 years ago
7 0
Atom is the unit used to express energy transfer
hichkok12 [17]3 years ago
4 0
It should be watts. <span>A </span>watt<span> is the number of </span>joules generated per second. <span>A kilocalorie is 4,184 </span>joules<span>, the amount of energy that will heat 1 kilogram of water by 1 degree </span>Celsius<span>. </span> 
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An empty vial weighs 55.32 g. (a) If the vial weighs 185.56 g when filled with liquid mercury (d = 13.53 g/cm3). What i its volu
Tasya [4]

Answer:

a) Volume of vial= 9.626cm3

b) Mass of vial with water = 62.92 g

Explanation:

a) Mass of empty vial = 55.32 g

Mass of Vial + Hg = 185.56 g

Therefore,

mass\ of\ Hg = 185.56-55.32 = 130.24 g

Density of Hg = 13.53 g/cm3

Volume\ of\ vial = Volume\ of\ Hg = \frac{Mass}{Density} \\\\= \frac{130.24g}{13.53g/cm3} = 9.626 cm3

b) Volume of water = volume of vial = 9.626 cm3

Density of water = 0.997 g/cm3

Mass\ of\ water = Density*volume = 0.997g/cm3*9.626cm3=9.60 g\\\\Total\ Mass\ of\ vial = Empty\ vial + mass\ of\ water\\= 53.32+9.60= 62.92g

3 0
3 years ago
What is an isotope? Explain why isotopes having different number of neutrons are still considered to be the same element on the
Mazyrski [523]

Isotopes of any given factor all incorporate the equal variety of protons, so they have the identical atomic wide variety (for example, the atomic wide variety of helium is usually 2). Isotopes of a given factor include exceptional numbers of neutrons, therefore, special isotopes have special mass numbers.

3 0
3 years ago
Read 2 more answers
Write the chemical symbol for the ion<br> with 33 protons and 36 electrons
Rashid [163]
  • We cannot change protons of any element
  • So the atomic number is 33
  • The element is Arsenic(As)

Now here is 36 electrons so it's. tri cation.

Symbol

\\ \tt\hookrightarrow As^{3+}

5 0
2 years ago
How many grams of water can be produced when 65.5 grams of sodium hydroxide reacts with excess sulfuric acid? Unbalanced equatio
kap26 [50]
The balanced reaction that describes the reaction between sulfuric and sodium hydroxide to produce sodium sulfate and water is expressed <span>H2SO4 + 2NaOH → 2H2O + Na2SO4. When 65.5 grams of sodium hydroxide reacts with excess sulfur, we need first to convert the mass to moles and multiply by stoich ratio 2/2 or 1. Hence the moles is multiplied to the molar mass of water. The final answer is 29.475 grams water.</span>
8 0
3 years ago
Is evaporation/condensation a physical or chemical change? Explain
jenyasd209 [6]
Physical change because it still has the same chemical formula
4 0
3 years ago
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