Which is a possible explanation for why metals would be reactive

Answers

Answer 1

Answer:

Answer: The reactivity of a metal depends on how easily it loses electrons

The reactivity of metals is due to the difference in stability of their electron configurations as atoms and as ions. As they are all metals they will form positive ions when they react.

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Calculate the molarity (M) of 1.5 L solution of todium nitrate (NaNO3) containing 61.2 g of NaNO3

Answers

Answer:

$\huge\boxed{\sf Molarity = 0.48\ M}$

Explanation:

Given data:

Volume of solution = 1.5 L

Mass of solute = 61.2 g

Molar mass of solute:

= 23 + 14 + (16 × 3)

= 23 + 14 + 48

= 85 g/mol

Required:

Molarity = ?

Formula:

Molarity = no. of moles of solute / volume

Solution:

First, we have to find moles of solute.

We know that,

Moles = mass / molar mass

Moles = 61.2 / 85

Moles = 0.72 moles

Now, finding molarity:

Molarity = 0.72 / 1.5

Molarity = 0.48 M

$\rule[225]{225}{2}$

The molarity of the 1.5 L solution of sodium nitrate containing 61.2 g of NaNO3 is approximately **0.480 M**

To calculate the molarity (M) of a solution, you can use the formula:

$\text{Molarity (M)} = \frac{\text{moles of solute}}{\text{volume of solution (L)}}$

- Volume of solution ($ V $) = 1.5 L

- Mass of sodium nitrate = 61.2 g

- Molar mass of sodium nitrate = 85 g/mol (Na: 23 g/mol, N: 14 g/mol, O: 16 g/mol)

First, calculate the moles of sodium nitrate using its molar mass:

$\text{Moles of } \text{NaNO}_3 = \frac{\text{Mass}}{\text{Molar mass}} = \frac{61.2 \, \text{g}}{85 \, \text{g/mol}} \approx 0.720 \, \text{mol}$

Now, substitute the values into the molarity formula:

$\text{Molarity (M)} = \frac{0.720 \, \text{mol}}{1.5 \, \text{L}} \]Calculate:\[ \text{Molarity (M)} \approx 0.480 \, \text{M}$

So, the molarity of the 1.5 L solution of sodium nitrate containing 61.2 g of NaNO3 is approximately **0.480 M**.

To know more about molarity refer here:
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Which of the following compounds would be most effective in lowering the melting point of ice on roads?

a) CaCl2

b) NaCl

C) K3PO4

d) K2SO4

Answers

I'm not 100% sure on this, but I would go with C) NaCl.
NaCl is a salt, and that is used to melt the ice on the roads. Hope this helps!

Help! answer 7 & 9 please.

Answers

Answer:

7 : I think it is because heat rises, and to make the hot air balloon ride is the fire torch inside it.

Explanation:

I donno 9

How many miles of a gas sample are in a 20.0 l container at 373kand 203 kpa? the gas constant is 8.31 l-kpa/m-k

Answers

To simplify our solution for this probelm we first assume that the gas we are dealing with is an ideal gas. Given that it is ideal we can proceed the solution using the formula: PV=nRT where P is pressure (203KPa), V is volume (20.0 L), n is moles (required), T is absolute temperature (373K) and R is the gas constant ( 8.31 l-kpa/m-k). Plug in the given to the respective variables and you should get 3.28 moles of the gas sample.

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products? a) The product is doubled. b) The product is half the mass of the reactants. c) The mass is the same. d) The mass changes depending on the reaction.

Answers

Answer:

c) The mass is the same

Explanation:

According to the Law of Conservation of Mass, the total mass of the reactants in a chemical reaction is always equal to the total mass of the products formed. This means that the total mass of the reactants and the total mass of the products will always be the same.

Water is a very important factor for us individually, but its importance stretches further than that. For instance, because water absorbs _______ very well, the oceans help stabilize temperatures around the world.

Answers

The answer is heat, water has a high specific heat and is able to carry a lot of energy.

Water has specific heat. This helps us with homeostasis.

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