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3 years ago

When dissolved beryllium chloride reacts with dissolved silver nitrate in

Chemistry

1 answer:

JulijaS [17]3 years ago

6 0

Answer:

This should be a double displacement reaction that yields a precipitate, making it also a precipitation reaction.

Explanation:

The full reaction equation is:

BeCl2(aq) + 2AgNO3(aq) --> Be(NO3)2(aq) + 2AgCl(s)

The two reactants exchange their cations/anions to create two different products, which makes them doubly displaced.

However, AgCl is also a solid (as referenced in the question as a powder). Therefore, it means a precipitate was created in this reaction, thus making it a precipitation reaction.

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Which shows the correct relationship?

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<span>small K = positive ∆G = negative E0cell</span>

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4 years ago

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What information about a molecule can you determine from its<br> chemical formula?

Ira Lisetskai [31]

Answer:

Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol.

6 0

3 years ago

It is known that 32g of oxygen takes up 24 litres of space at 25oC. Calculate the volume of oxygen that is needed to react compl

Gwar [14]

6 L of oxygen (O₂)

Explanation:

We have the following chemical reaction:

2 Mg + O₂ → 2 MgO

Now we calculate the number of moles of magnesium:

number of moles = mass / molar weight

number of moles of Mg = 12 / 24 = 0.5 moles

Taking in account the chemical reaction we devise the following reasoning:

if 2 moles of Mg react with 1 mole of O₂

then 0.5 moles of Mg react with X moles of O₂

X = (0.5 × 1) / 2 = 0.25 mole of O₂

mass = number of moles × molar weight

mass of O₂ = 0.25 × 32 = 8 g

Knowing the information given by the problem that 32 g of O₂ takes up 24 liters of space, we devise the following reasoning:

if 32 g of O₂ takes up 24 liters of space

then 8 g of O₂ takes up Y liters of space

Y = (8 × 24) / 32 = 6 L of O₂

Learn more about:

balancing chemical reactions

brainly.com/question/14187466

#learnwithBrainly

4 0

3 years ago

A sample of ammonium nitrate, weighing 25.2 g, was added to a 150.0 mL container of H2O at 20.0 °C, and then is thoroughly disso

OLga [1]

Explanation:

It is known that the relation between heat energy, specific heat and change in temperature is as follows.

q = $m \times C \times \Delta T$

where, q = heat released or absorbed

m = mass of substance

C = specific heat

$\Delta T$ = change in temperature

It is given that mass is 25.2 g and it is added to 150 ml container so total mass will be (25.2 g + 150 g) = 175.2 g, $T_{1}$ is $20^{o}C$ , $T_{2}$ is $8.5^{o}C$ , and specific heat of water is 4.184 $J/g ^{o}C$ .

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

q = $m \times C \times \Delta T$

= $175.2 g \times 4.184 J/g^{o}C \times (8.5 - 20)^{o}C$

= $175.2 g \times 4.184 J/g^{o}C \times -11.5^{o}C$

= -8430 J

As, 1 J = 0.001 kJ. Hence, -8430 J will also be equal to -8.43 kJ. The negative sign indicates that heat is being lost.

Thus, we can conclude that heat (kJ) was lost by the solution (surroundings) is 8.43 kJ.

6 0

4 years ago

Explain how the valence electrons are related to the element's period.

AlekseyPX

Answer:

The number of valence electrons in an atom is reflected by its position in the periodic table of the elements (see the periodic table in the Figure below). Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next

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3 years ago