3 months ago

The total number of electrons in one mole of fluorine molecules (F2) is

1 answer:

3 0

<span>Fluorine has an atomic number of 9, which indicates that each atom contains 9 protons and 9 electrons. One mole contains 6.0x10^23 entities, resulting in an answer of 4.</span>

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How much water must be added to 36.0 g of srcl2 to produce a solution that is 35.0 wt% srcl2? how much water must be added to 36

Tems11 [2777]

To address this issue, we can apply the following equation:

w = (mass of solute) / (mass of solution)

w - percentage

It is important to note that the mass of the solution is the sum of the mass of the solute and the mass of the water.

<span>w = mass CaCl2/(mass of water + mass of CaCl2)
</span>
mass of water = x

0.35 = 36 / (x + 36)

0.35 × (x + 36) = 36

0.35x + 12.6 = 36

0.35x = 23.4

x = 66.86 g of water is required

8 0

2 months ago

A 2.40 kg block of ice is heated with 5820 J of heat. The specific heat of water is 4.18 J•g^-1•C^-1. By how much will it’s temp

lorasvet [2795]

Response: The increase in temperature is $0.53^0C$

Reasoning:

The amount of thermal energy needed to elevate the temperature of a given substance by one degree Celsius is referred to as the specific heat capacity.

$Q=m\times c\times \Delta T$