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2 years ago

How many molecules are in

Chemistry

1 answer:

diamong [38]2 years ago

6 0

Answer:

3.6 × 10²⁴ molecules

Explanation:

Step 1: Given data

Moles of methane (n): 6.0 moles

Step 2: Calculate the number of molecules of methane in 6.0 moles of methane

In order to convert moles to molecules, we need a conversion factor. In this case, we will use Avogadro's number: there are 6.02 × 10²³ molecules of methane in 1 mole of molecules of methane.

6.0 mol × 6.02 × 10²³ molecules/1 mol = 3.6 × 10²⁴ molecules

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Calculate the molar solubility of CaF2 at 25°C in a solution that is 0.010 M in Ca(NO3)2. The Ksp for CaF2 is 3.9 x 10-11.

madreJ [45]

Answer:

$Molar \ solubility=3.12x10^{-5}M$

Explanation:

Hello,

In this case, for the dissociation of calcium fluoride:

$CaF_2(s)\rightleftharpoons Ca^{2+}+2F^-$

The equilibrium expression is:

$Ksp=[Ca^{2+}][F^-]^2$

In such a way, via the ICE procedure, including an initial concentration of calcium of 0.01 M (due to the calcium nitrate solution), the reaction extent $x$ is computed as follows:

$3.9x10^{-11}=(0.01+x)(2*x)^2\\\\x=0.0000312M$

Thus, the molar solubility equals the reaction extent $x$ , therefore:

$Molar \ solubility=3.12x10^{-5}M$

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2 years ago

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TiliK225 [7]

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3 years ago

Does dissolution or crystallization produce heat?

valentinak56 [21]

Crystallization produces heat.

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2 years ago

What is one effect of adding heat?

Bumek [7]

Answer:

Explanation:

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Read 2 more answers

Write the nuclear equation for the beta decay Ni-60

viktelen [127]

$^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e$ is the nuclear equation for the beta decay Ni-60.

<h3>What is beta decay?</h3>

Beta-decay occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other.

The nuclear equation for the beta decay Ni-60

$^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e$

In beta minus (β−) decay, a neutron is converted to a proton, and the process creates an electron and an electron antineutrino; while in beta plus (β+) decay, a proton is converted to a neutron and the process creates a positron and an electron neutrino. β+ decay is also known as positron emission.

Hence, $^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e$ is the nuclear equation for the beta decay Ni-60.

Learn more about the beta decay here:

brainly.com/question/25455333

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1 year ago