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Yuliya22 [10]
3 years ago
14

What is the matter of science​

Chemistry
1 answer:
weqwewe [10]3 years ago
3 0
The finagling in the hole
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When the products of a reaction have a lower enthalpy than the reactants___?
amid [387]

Answer:

The reactión is exothermic

Explanation:

The change in enthalpy follow the next equation:

ΔH = ΔH(products) - ΔH(reactants)

If the products have a lower enthalpy means that ΔH<0; this mean that the reaction gives heat to the environment

5 0
4 years ago
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Enter the molecular equation representing aqueous nitric acid and aqueous ammonia reacting. express your answer as a balanced mo
PtichkaEL [24]
Aqueous nitric acid and aqueous ammonia reacts to form ammonium nitrate 
 HNO₃(aq)+NH₃(aq) = NH₄NO₃(aq)
 HNO₃ +NH3 = NH₄ (+) + NO₃ (-)
Therefore the net ionic equation will be;
 H⁺(aq) + NH₃ = NH₄⁺ (aq)

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3 years ago
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Please help I’ve been stuck for 2 hours
Vinvika [58]

find the answer in the attached image. please mark as brainliest if it is helpful.

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3 years ago
A popular classroom demonstration consists of filing notches into a new penny and soaking the penny in hydrochloric acid overnig
Ivanshal [37]

Answer:

HCl conc=2.2M

Explanation:

From the question we are told that:

Mass of zinc Mass_{z_n}=2.5g

Initial conc of HCl HConc_1=6.0M

Initial volume of HCl Hvol_1=20.0mL

Molar mass of zinc M_{Z_n}=65.38g/mol

Generally the equation for reaction  is mathematically given by

2HCL+Zn\implies ZnCl_2 +H_2

Generally the equation for moles of zinc m_{z_n} is mathematically given by

m_{z_n}=\frac{Mass_{Z_n}}{M_{Z_n}}

m_{z_n}=\frac{2.5g}{M_{65.38}}

m_{z_n}=0.038molZn

Generally the equation for moles of m_{HCl} is mathematically given by

m_{HCl}=HConc_1*Hvol_1

m_{HCl}=6.0M*20.0mL

m_{HCl}=6.0M*20.0*10^{-3}L

m_{HCl}=0.12\ mol\ HCl

Generally the reacted moles of HCl HCl_[reacted] is mathematically given by

Since

Zn:HCl =1:2

Therefore

HCl_[reacted]=0.038*\frac{2}{1}

HCl_[reacted]=0.076mol \ HCl

Generally the moles of HCl after Zn oxidization X is mathematically given by

x=0.12-0.076

x=0.044 mol HCl

Generally the conc of hydrochloride acid X is mathematically given by

X=\frac{0.044}{0.020}

X=2.2 M Hcl

Therefore Conc of HCl

HCl conc=2.2M

5 0
3 years ago
Experiments, ATOMS, plz answer, and thx for your help
aalyn [17]
Yuppppp they are absolutely rightt
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3 years ago
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