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3 years ago

A student has a piece of aluminum metal. Which is the most reasonable assumption the student could make about the metal?

Chemistry

2 answers:

ollegr [7]3 years ago

6 0

Answer:

E. It could be stretched into a thin wire.

Explanation:

Metals are malleable. This means that they can be hammered or pressed into different shapes without braking. They are also ductile, which means that they can be drawn out into thin wires without braking.

igor_vitrenko [27]3 years ago

3 0

Aluminium belongs to 13th group of periodic table. It undergoes oxidation to given Al^+3 .

It is observed that when aluminium is added to a solution of copper sulphate the colour of the solution changes from blue to grey. It is due to formation of grey coloured solution of aluminium sulphate as

2Al^+3 + 3SO4^-2 ---> Al2(SO4)3

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0.32 g of a walnut is burned under an aluminum can filled with 58.1 mL of water. The water temperature in the can increases by 3

balu736 [363]

Answer:

1.8 × 10² cal

Explanation:

When 0.32 g of a walnut is burned, the heat released is absorbed by water and used to raise its temperature. We can calculate this heat (Q) using the following expression.

Q = c × m × ΔT

where,

c: specific heat capacity of water

m: mass of water

ΔT: change in the temperature

Considering the density of water is 1 g/mL, 58.1 mL = 58.1 g.

Q = c × m × ΔT

Q = (1 cal/g.°C) × 58.1 g × 3.1°C

Q = 1.8 × 10² cal

3 0

3 years ago

How many grams of KCN are in 10.0 ml of a 0.10 M solution?

attashe74 [19]

Explanation:

As it is known that molarity is the number of moles present in a liter of solution.

Mathematically, Molarity = $\frac{no. of moles}{Volume in liter}$

As it is given that molarity is 0.10 M and volume is 10.0 ml. As 1 ml equals 0.001 L. Therefore, 10.0 ml will also be equal to 0.01 L.

Hence, putting these values into the above formula as follows.

Molarity = $\frac{no. of moles}{Volume in liter}$

0.10 M = $\frac{no. of moles}{0.01 L}$

no. of moles = 0.001 mol

As molar mass of KCN is equal to 65.12 g/mol. Therefore, calculate the mass of KCN as follows.

No. of moles = $\frac{mass}{molar mass}$

0.001 mol = $\frac{mass}{65.12 g/mol}$

mass = 0.06152 g

Thus, we can conclude that 0.06152 grams of KCN are in 10.0 ml of a 0.10 M solution.

3 0

3 years ago

What is a chocking smell

Goshia [24]

Answer:

A horrible, nasty smell.

Explanation:

A choking smell is a nasty, horrible smell. Hope this helps!

7 0

3 years ago

You notice that when the parchment paper of an ancient document is exposed to a certain chemical, the parchment paper becomes a

const2013 [10]

You have done a chemical change

5 0

2 years ago

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0172 M solution. If the pH of the resulting solution is 2.

Mumz [18]

Answer:

9.7 x 10⁻⁴

Explanation:

HA ⇄ H⁺ + A⁻

C(eq) 0.0174 10⁻²·³⁹ 10⁻²·³⁹

=0.0041M =0.0041M

Ka = [H⁺][A⁻]/[HA] = (0.0014)²/(0.0174) = 9.7 x 10⁻⁴

8 0

2 years ago