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Scorpion4ik [409]
3 years ago
12

Antonio and his friend found a piece of metal which they want to identify. Here is what they figure out so far: Mass of this met

al is 20g Volume of this metal is 2.35cm3
Chemistry
1 answer:
natima [27]3 years ago
6 0

Answer:

The density of beryllium copper is 8.5 g/cm³ thus given metal is beryllium copper.

Explanation:

Given data:

Mass of metal = 20 g

Volume of metal = 2.35 cm³

Which metal is this = ?

Solution:

we will apply density formula to solve this problem.

d = m/v

d = density

m = mass

v = volume

d = 20 g/ 2.35 cm³

d = 8.5 g/cm³

The density of beryllium copper is 8.5 g/cm³ thus given metal is beryllium copper.

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Using the material selection processes, justify why the manufacturers/designers used the materials they did for super glue?
damaskus [11]

Answer:

Aluminium reusable water bottle Purpose of aluminum: Weighs less by volume than most other metals and comes at an affordable price.

Explanation:

6 0
2 years ago
Answer the questions for the following reaction at chemical equilibrium: Cl2(g) + KBr(aq) <----> KCl(aq) + Br2(l) + heat 1
const2013 [10]

Answer:

1.Backward

2.Neither

3.Backward

4.Forward

5.Forward

Explanation:

When we increase the temperature

Then, by Lechatelier principle

It states that if a constraints such as concentration of reactants,change in volume , pressure,temperature  is applied to a system of equilibrium ,the equilibrium shift in a direction in which oppose the effect of constraints.

Using Lechatelier principle

1.The equilibrium shift in backward direction when we increase the temperature.

2.When we add CaO then it is not reactant of given reaction or not a product therefore, when we add CaO then it does not effect euilibrium condition.

Then , the equilibrium neither shift in any direction.

3.When we decrease the concentration of chlorine gas then the number of

Then the equilibrium shift in backward direction by Le chetelier principle.

Hence , the reaction would be favored backward  if the amount of chlorine gas was decreased.

4.When we increase the pressure then the equilibrium shift in forward direction.

Hence, the reaction would be favored in forward reaction when we increase the pressure.

5.When we increase concentration of any  reactant then the equilibrium shift in forward direction.

Hence, when we add more chlorine gas then the reaction would be favored forward reaction.

4 0
3 years ago
Read 2 more answers
What process must happen before this process depicted below?
Vinil7 [7]

In glycolysis, glucose molecule is converted into pyruvate molecules .

It can't be cellular respiration because it starts always with glucose i.e glycolysis. But here it is the process after glycolysis (starting from pyruvate) and changing into lactic acid. It's an aerobic respiration called as lactic acid fermentation.

Fermentation

8 0
3 years ago
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What is the difference between ionic formula and the molecular formula?​
Kaylis [27]

Answer:

Molecular compounds are pure substances formed when atoms are linked together by sharing of electrons while ionic compounds are formed due to the transfer of electrons. 2. ... Molecular compounds are formed between two non-metals while ionic compounds are formed between metals and non-metals.

3 0
2 years ago
What volume of carbon dioxide is produced when 6.40 g of methane gas, CH4 (g), reacts with excess oxygen? All gases are at 35.0C
Mandarinka [93]

Answer:

V = 10.3 L

Explanation:

Given data:

Mass of methane = 6.40 g

Volume of CO₂ produced = ?

Temperature = 35°C (35+273 = 308 K)

Pressure = 100.0 KPa (100.0/101 = 0.98 atm)

Solution:

Chemical equation:

CH₄ +  2O₂        →       CO₂ + 2H₂O

Number of moles of CH₄:

Number of moles = mass/molar mass

Number of moles = 6.40 g/ 16 g/mol

Number of moles = 0.4 mol

Now we will compare the moles of CO₂ with CH₄.

         CH₄          :         CO₂

           1             :           1

        0.4            :         0.4

Volume of CO₂:

Formula:

PV = nRT

0.98 atm ×V = 0.4 mol ×0.0821 atm.L/mol.K ×  308 K

0.98 atm ×V = 10.11 atm.L

V = 10.11 atm.L /0.98 atm

V = 10.3 L

3 0
2 years ago
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