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4 years ago

X2o3 express you answer as a whole number

1 answer:

4 0

2.40 - 1.68 =0.72 g of oxigen
moles = 0.72/16 g/mol=0.045

moles x = 1.68/ 55.9=0.03

0.03/0.03 = 1 = x
0.045 / 0.03 = 1.5 = O

to get whole numbers multiply by 2

x2O3

X2O3 +3 CO = 2 X + 3 CO2

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How many grams of calcium chloride will be produced when 29.0 g of calcium carbonate is combined with 15.0 g of hydrochloric aci

horsena [70]

Answer:

22.7 g of CaCl₂ are produced in the reaction

Explanation:

This is the reaction:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O

Now, let's determine the limiting reactant.

Let's divide the mass between the molar mass, to find out moles of each reactant.

29 g / 100.08 g/m = 0.289 of carbonate

15 g / 36.45 g/m = 0.411 of acid

1 mol of carbonate must react with 2 moles of acid

0.289 moles of carbonate will react with the double of moles (0.578)

I only have 0.411 of HCl, so the acid is the limiting reactant.

Ratio is 2:1, so I will produce the half of moles, of salt.

0.411 / 2 = 0.205 moles of CaCl₂

Mol . molar mass = mass → 0.205 m . 110.98 g/m = 22.7 g

5 0

4 years ago

How would the results differ if you add sodium p-toluate instead of p-toluic acid to the 2 layer mixture of tert-butyl methyl et

anastassius [24]

Hey there!:

That depends on the pH of the water layer. If the water layer is basic or rather just not acidic, it will be in the water layer. If the water layer is acidic, pH 4 or less, it will be in the ether layer. On the question of upper and lower, either has a density of less than one so it will be the upper layer.

8 0

3 years ago

Using the activity series, write balanced chemical equations for the following reactions. If not reaction occurs, simply write N

MissTica

Answer:

a) $2 Ni (s) + Cu(NO_3)_2 (aq) \longrightarrow Cu(s) + 2 NiNO_3 (aq)$

b) NR

c) NR

d) $2 Cr (s) + 3 CoCl_2 (aq) \longrightarrow 3 Co(s) + 2CrCl_3 (aq)$

e) NR

Explanation:

a) Nickel is more reactive than copper so the first one will displace the other:

$2 Ni (s) + Cu(NO_3)_2 (aq) \longrightarrow Cu(s) + 2 NiNO_3 (aq)$

b) Due to the higher reactivity the magnesium has compared to the zinc, the first will remain in solution and the second will reamin solid. So, NR.

c) No reaction occurs, gold is resistant to acid in normal conditions due to its characteristic as noble metal.

d) Chromium is more reactive than cobalt so the last one will be displaced:

$2 Cr (s) + 3 CoCl_2 (aq) \longrightarrow 3 Co(s) + 2CrCl_3 (aq)$

e) Nothing happens, the reduction potencial of the hydrogen gas bubbled ins't enough to reduce the silver.

8 0

3 years ago

Explain how the type of an atom is defined?

eimsori [14]

Answer:

the type of atom is defined by how many protons, neutrons, and electrons the atom has

6 0

4 years ago

Read 2 more answers

Vitellium (Vi) has the following composition:

Dvinal [7]

Answer is: C.)It will be closer to the mass of Vi–193.
Average atomic mass of vitellium =
Ar(Vi-188) · ω(Vi-188) + Ar(Vi-191) · ω(Vi-191) + Ar(Vu-193) · ω(Vi-193).
Average atomic mass of vitellium =
187.9122 amu · 0,10861 + 190.9047 amu · 0,12428 + 192.8938 amu · 0,76711.
Average atomic mass of vitellium = 20,409 + 23,725 + 147,970.
Average atomic mass of vitellium = 192,104.

4 0

3 years ago