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3 years ago

What occurs along a convergent plate boundary

1 answer:

8 0

At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.

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Give valency of the cation and anion in zinc sulphate

Oxana [17]

Answer:

valency of zinc cation - 2

valency of zinc sulphate - 2

hope it helps!

7 0

2 years ago

Iron(iii) oxide is formed when iron combines with oxygen in the air. How many moles of Fe2O3 are formed when 55.8 g or Fe reacts

iogann1982 [59]

Answer: The correct answer is Option B.

Explanation:

To calculate the number of moles, we use the formula:

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$

<u>Moles of Iron</u>

Molar mass of iron = 55.8 g/mol

Given mass of iron = 558.8

Putting values in above equation, we get:

$Moles=\frac{55.8g}{55.8g/mol}=1mole$

For the given chemical equation:

$4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)$

By Stoichiometry,

4 moles of Iron produces 2 moles of Iron(III) oxide

So, 1 mole of Ion will produce = $\frac{2}{4}\times 1$ = 0.5 mole of Iron (III) oxide.

Hence, the correct answer is Option B.

8 0

3 years ago

Convert 35 g of iron to moles of iron.

Ad libitum [116K]

Answer:

ummmmm 35???????

Explanation:

5 0

2 years ago

What is reason of the formation of tectonic plates?

kvv77 [185]

Explanation:

The driving force behind plate tectonics is convection in the mantle. Hot material near the Earth's core rises, and colder mantle rock sinks.

8 0

3 years ago

Read 2 more answers

Number of grams of hcl that can react with 0.500 grams of Al(OH)3

vlabodo [156]

Answer:

0.7g of HCl

Explanation:

First, let us write a balanced equation for the reaction between HCl and Al(OH)3.

This is illustrated below:

Al(OH)3 + 3HCl —> AlCl3 + 3H2O

Next, let us obtain the masses of Al(OH)3 and HCl that reacted together according to the equation. This can be achieved as shown below:

Molar Mass of Al(OH)3 = 27 + 3(16+1)

= 27 + 3(17) = 27 + 51 = 78g/mol.

Molar Mass of HCl = 1 + 35.5 = 36.5g/mol

Mass of HCl from the balanced equation = 3 x 36.5 = 109.5g

Now we can obtain the mass of HCl that would react with 0.5g of Al(OH)3. This can be achieved as follow:

Al(OH)3 + 3HCl —> AlCl3 + 3H2O

From the equation above,

78g of Al(OH)3 reacted with 109.5g of HCl.

Therefore, 0.5g of Al(OH)3 will react with = (0.5 x 109.5)/78 = 0.7g of HCl

7 0

3 years ago