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Diano4ka-milaya [45]
3 years ago
8

(50 POINTS)THIS IS A TIMED TEST PLEASE ANSWER

Chemistry
1 answer:
ella [17]3 years ago
3 0

Answer:

Please attach pic of the question

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If 5.85 grams of cobalt metal react with 15.8 grams of silver nitrate, how many grams of silver metal can be formed and how many
vladimir2022 [97]
Answers:
<span>Answer 1: 10.03 g of siver metal can be formed.</span>
Answer 2: 3.11 g of Co are left over.

Work:

1) Unbalanced chemical equation (given):

<span>Co + AgNO3 → Co(NO3)2 + Ag

2) Balanced chemical equation
</span>
<span>Co + 2AgNO3 → Co(NO3)2 + 2Ag

3) mole ratios

1 mol Co : 2 mole AgNO3 : 1 mol Co(NO3)2 : 2 mol Ag

4) Convert the masses in grams of the reactants into number of moles

4.1) 5.85 grams of Co

# moles = mass in grams / atomic mass

atomic mass of Co = 58.933 g/mol

# moles Co = 5.85 g / 58.933 g/mol = 0.0993 mol

4.2) 15.8 grams of Ag(NO3)

# moles Ag(NO3) = mass in grams / molar mass

molar mass AgNO3 = 169.87 g/mol

# moles Ag(NO3) = 15.8 g / 169.87 g/mol = 0.0930 mol

5) Limiting reactant

Given the mole ratio 1 mol Co : 2 mol Ag(NO3) you can conclude that there is not enough Ag(NO3) to make all the Co react.

That means that Ag(NO3) is the limiting reactant, which means that it will be consumed completely, whilce Co is the excess reactant.

6) Product formed.

Use this proportion:

2 mol Ag(NO3)           0.0930mol Ag(NO3)    
--------------------- =      ---------------------------
    2 mol Ag                              x

=> x = 0.0930 mol

Convert 0.0930 mol Ag to grams:

mass Ag = # moles * atomic mass = 0.0930 mol * 107.868 g/mol = 10.03 g

Answer 1: 10.03 g of siver metal can be formed.

6) Excess reactant left over

    1 mol Co                             x
----------------------- =  ----------------------------
2 mole Ag(NO3)       0.0930 mol Ag(NO3)

=> x = 0.0930 / 2 mol Co = 0.0465 mol Co reacted

Excess = 0.0993 mol - 0.0465 mol = 0.0528 mol

Convert to grams:

0.0528 mol * 58.933 g/mol = 3.11 g

Answer 2: 3.11 g of Co are left over.
</span>


8 0
3 years ago
Which Sphere does condensation occur.
Xelga [282]

Answer:

The atmosphere, I believe.

Explanation:

4 0
3 years ago
Describe 3 everyday situations in which it would be useful to identify unknown substances and explain how you would identify the
andrew-mc [135]

The three situations can be described as

a) If we have two white powders and wish to distinguish between the two : the combinations can be sugar / salt or sugar / baking soda or salt / baking soda

all are kitchen items so we can either taste them

or in case of baking soda we can add it in water and it will produce brisk effervescence.

b) IF we have to distinguish in a given set of two transparent liquids which appear to be water (example water and vinegar)

we can identify them with the taste

we can identify them based on pH (vinegar will be acidic)

c) We have to find adulteration in a given sample of food

like adulteration in milk

for example presence of soap in milk

We can add indicator like phenolphthalein which will bring a pink colour in milk if soap is present

4 0
4 years ago
Read 2 more answers
The acid-dissociation constant at 25.0 °c for hypochlorous acid (hclo) is 3.0 ⋅ 10−8. at equilibrium, the molarity of h3o+ in a
maks197457 [2]

Hypochlorous acid is a weak acid. The K_{a} value for the dissociation of HOCl is 3.0 * 10^{-8}


3 0
3 years ago
Which of the following cannot be broken down into different elements?
belka [17]
Atoms. Well, they can be broken down, but that won't happen that fast.
7 0
3 years ago
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