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SOVA2 [1]
1 year ago
6

Can anyone please help me find molar masses of compounds. For example Copper (ll) sulfate (CuSO4)

Chemistry
2 answers:
Alina [70]1 year ago
7 0

Answer:

Explanation:

You would have to add up the atomic masses of all the compounds in the compound, making sure you include how many molecules of each are in the compound

For example, in CuSOA we have 1 molecule of Cu and S, as 4 molecules of O

The atomic masses are as follows:

Cu = 63.55 u

S = 32.065 u

O = 15.99 units

This is how we would add it up:

(Atomic mass of Cu) + (Atomic mass of S) + 4(Atomic Mass of O)

(63.55) + (32.065) + 4(15.99)

(63.55) + (32.065) + 63.96

= 159.575 u

Eva8 [605]1 year ago
5 0
Molar mass is relatively simple to calculate, but you cannot do it with a periodic table, whether that be a physical one or a digital version.
in order to find the molar mass, we must find the relative atomic masses of each element that makes up the compound. With the example copper (II) sulfate. we must find the mass of Cu, S, and O.
this is where the periodic table comes in. you just look up these values!
mass Cu =63.55g
mass S = 32.06g
Mass O = 16g
The next step is to multiply the relative atomic masses by the number of that element in the compound. For instance, one mole of cu is found is this compound, one mole of s, and four moles of o. **this is found by looking at the coefficients in the formula of the compound
this would mean that the mass of oxygen in this is 16 * 4 = 64g
now, you can calculate the molar mass by adding all of the relative atomic masses together.
molar mass = molCu(mass Cu) + molS(mass S) = molO(mass O)
= 1(63.55) + 1(32.06) + 4(16) = 159.61g
this can be done for any compound following the same steps
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Answer:

For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.

Explanation:

hope this help

5 0
2 years ago
What is the balanced equation for the voltaic cell of copper and silver
Strike441 [17]

Answer:

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Explanation:

3 0
3 years ago
Solid sodium chloride is formed by the reaction of chlorine gas and solid sodium . write a balanced chemical equation for this r
LuckyWell [14K]
There are no states in the picture, but Na should have a "(s)" after it, and Cl2 should have a "(g)" after it. NaCl should have an "(s)". Chlorine is a diatomic element so it has a "2" subscript on it. 

Hope this helped! :)

4 0
3 years ago
0.350 mol of a solid was dissolved in 260 mL of water at 21.2 oC. After the solid had fully dissolved, the final temperature of
Fittoniya [83]

Answer: Heat of the solution  = mass water × specific heat water × change in temperature

mass water = 260ml (1.00g/ml ) = 260g

specific heat of water = c(water) = 4.184J/ g°C

Heat change of water = final temperature - initial temperature

                                       = 26.5 - 21.2

                                        = 5.3 °C

H = 260 g ( 4.184J/g°C ) (5.3°C) = 5765J

Molar heat = \frac{5765J}{0.350mol}

                    = 16473J/mol

Explanation: finding molar heat requires first to look at  specific heat of water and the change of water temperature

7 0
3 years ago
If the density of a 45.0 cm3 block of wood is 0.65 g/ml what is the mass of the wood?
wlad13 [49]

Answer:

\boxed {\tt mass=29.25 \ grams}

Explanation:

The density formula is mass over volume.

d=\frac{m}{v}

Rearrange the formula for the mass, m. Multiply both sides of the formula by v.

d*v=\frac{m}{v}*v

d*v=m

Mass can be found by multiplying the density and volume. The density is 0.65 grams per milliliter and the volume is 45.0 cubic centimeters.

  • A cubic centimeter is equal to a milliliter.
  • Therefore, 45 cubic centimeters also equals 45 milliliters.

d= 0.65 \ g/mL\\v= 45 \ mL

Substitute the values into the formula.

0.65 \ g/mL * 45 \ mL=m

Multiply. Note the milliliters, or mL will cancel out.

0.65 \ g * 45=m

29.25 \ g=m

The mass of the wood is 29.25 grams.

5 0
3 years ago
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