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3 years ago

Things that attract people to a new place are called

Chemistry

2 answers:

Y_Kistochka [10]3 years ago

6 0

Answer:

tourist attraction

Explanation:

olchik [2.2K]3 years ago

5 0

Tourist attraction.

Example: Things like the Statue of Liberty or the Eiffel Tower are tourist attractions that make people want to visit that new place .

hope this helps !

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You are given a small bar of an unknown metal. You find the density of the metal to be 10.5 g/cm3. An X-ray diffraction experime

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4 years ago

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Calculate the nuclear binding energy for 5525mn in megaelectronvolts per nucleon (mev/nucleon).

r-ruslan [8.4K]

To solve this question, let us first calculate how much all the nucleons will weigh when they are apart, that is:
Mass of 25 protons = 25(1.0073) = 25.1825 amu 

Mass of neutrons = (55-25)(1.0087) = 30.261 amu

So, total mass of nucleons = 30.261+25.1825 = 55.4435 amu

Now we subtract the mass of nucleons and mass of the Mn nucleus:
55.4435 - 54.938 = 0.5055 amu

This difference in mass is what we call as the mass defect of a nucleus. Now we calculate the binding energy using the formula:

E=mc^2 

But first convert mass defect in units of SI (kg):
Δm = 0.5055 amu = (0.5055) / (6.022x10^26)
Δm = 8.3942x10^-28 kg

Now applying the formula,
E=Δm c^2
E=(8.3942x10^-28)(3x10^8)^2
E=7.55x10^-11 J

Convert energy from Joules to mev then divide by total number of nucleons (55):

E = 7.55x10^-11 J * (6.242x10^12 mev / 1 J) / 55 nucleons

E = 8.57 mev / nucleon

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3 years ago

Which phase of matter is the rarest in the solar system

Ksenya-84 [330]

Answer:

liquid

Explanation:

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3 years ago

Sodium carbonate is a reagent that may be used to standardize acids. In such a standardization it was found that a 0.498-g sampl

VMariaS [17]

Answer:

The molarity of H2SO4 is 0.221 M

Explanation:

Step 1: Data given

Mass of sodium carbonate (Na2CO3) = 0.498 grams

Molar mass Na2CO3 = 105.99 g/mol

Volume of sulfuric acid (H2SO4) = 21.3 mL = 0.0213 L

Step 2: The balanced equation

Na2CO3 (aq) + H2SO4 (aq) → H2O (l) + CO2 (g) + Na2SO4 (aq)

Step 3: Calculate moles Na2CO3

Moles Na2CO3 = 0.498 grams / 105.99 g/mol

Moles Na2CO3 = 0.00470 moles

Step 4: Calculate moles H2SO4

For 1 mol Na2CO3 we need 1 mol H2SO4 to react and produce 1 mol H2O, 1 mol CO2 and 1 mol Na2SO4

For 0.00470 moles Na2CO3 we need 0.00470 moles H2SO4 to react

Step 5: Calculate molarity of H2SO4

Molarity H2SO4 =moles H2SO4 / volume

Molarity H2SO4 = 0.00470 / 0.0213 L

Molarity H2SO4 = 0.221 M

The molarity of H2SO4 is 0.221 M

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3 years ago

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Natalija [7]

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3 years ago

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