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3 years ago

Reactions in Our World Lab Report

Chemistry

2 answers:

Andreas93 [3]3 years ago

4 0

Answer:

I predict the reaction between __Fe___ and __CuSO___ will yield a _____single replacement_____ reaction/s.

I predict the reaction between ___ Pb(NO3)2__ and __ Kl___ will yield a _____ double replacement_____ reaction/s.

I predict the reaction between ___Mg__ and __HCI___ will yield a ____Single replacement______ reaction/s.

I predict the reaction between __ electrolysis___ and _____ will yield a ____ decomposition______ reaction/s.

I predict the reaction between __ Mg___ and __ O2___ will yield a ____ synthesis and inorganic combustion______ reaction/s.

Explanation:

snow_tiger [21]3 years ago

3 0

Answer:

I predict the reaction between iron and copper will yield a single replacement reaction/s.

I predict the reaction between nitrate and potassium will yield a single displacement reaction/s.

I predict the reaction between magnesium metal and hydrochloric acid will yield a single replacement reaction/s.

I don't know the last two :/

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PLEASE HELPPPPPPP:

crimeas [40]

Answer:

part 1 is from the article

Explanation:

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3 years ago

Find ΔHrxn for the following reaction: <br><br> 2PbS(s)+3O2(g)→2PbO(s)+2SO2(g)

ch4aika [34]

Answer:

ΔH°rxn = -827.5 kJ

Explanation:

Let's consider the following balanced equation.

2 PbS(s) + 3 O₂(g) → 2 PbO(s) + 2 SO₂(g)

We can calculate the standard enthalpy of reaction (ΔH°rxn) from the standard enthalpies of formation (ΔH°f) using the following expression.

ΔH°rxn = [2 mol × ΔH°f(PbO(s)) + 2 mol × ΔH°f(SO₂(g) )] - [2 mol × ΔH°f(PbS(s)) + 3 mol × ΔH°f(O₂(g) )]

ΔH°rxn = [2 mol × (-217.32 kJ/mol) + 2 mol × (-296.83)] - [2 mol × (-100.4) + 3 mol × 0 kJ/mol]

ΔH°rxn = -827.5 kJ

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3 years ago

An iceberg has a volume of 8925 ft3. is the mass in kilograms of the iceberg?

Novay_Z [31]

In chem it usually would be but it depends on your units and the instructions

6 0

3 years ago

i like this guy but i don't think he likes me back. he also goes to school somewhere else, but we see eachother every friday. he

Firdavs [7]

You should try to strt a conversation with him or say hi introduce yourself or ask him how hes doing just talk to him i guess

3 0

4 years ago

Read 2 more answers

When a strip of magnesium metal is placed in an aqueous solution of copper(II) nitrate, elemental copper coats the surface of th

Lera25 [3.4K]

Answer:

1. 2+ ( $Cu^{2+}$ ).

2. 0 ( $Cu^0$ ).

Explanation:

Hello,

In this case, the described chemical reaction is a redox reaction in fact, since the oxidation states of both magnesium and copper change as shown due to the displacement:

$Mg(s)+Cu(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Cu(s)$

Therefore:

1. Since copper is the cation in the copper (II) nitrate, the (II) means that its charge is 2+ ( $Cu^{2+}$ ).

2. Since copper is alone, it means no electrons are being neither shared not given, its charge is 0 ( $Cu^0$ ).

Best regards.

4 0

3 years ago