3 years ago

Identify an element when supplied with the natural abundance and mass of each isotope

1 answer:

4 0

The element can also be called gold-197. It has Mass number is 197, atomic number is 79 and electrons 79, Atoms that have the same number of protons but different number of neutrons. Isotopes have identical numbers of protons and electrons.

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All of the following can increase the rate of chemical reaction EXCEPT:

dangina [55]

Except catalyst because catalyst typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.

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3 years ago

All forces require an input of ______ - mass - energy - speed - atoms

artcher [175]

Energy is the correct answer. I hope I helped you

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2 years ago

Some antacid tables contain aluminum hydroxide. The aluminum hydroxide reacts with stomach acid according to the equation: Al(OH

MatroZZZ [7]

Answer:

26.67 mol HCl

Explanation:

Al(OH)₃ + 3HCl → AlCl₃ + 3H₂O

In order to solve this problem, we need to convert Al(OH)₃ moles to HCl moles.

To do so we use the stoichiometric ratios of the balanced reaction:

8.89 mol Al(OH)₃ * $\frac{3molHCl}{1molAl(OH)_{3}}$ = 26.67 mol HCl

Thus 26.67 moles of HCl would react completely with 8.89 moles of Al(OH)₃.

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2 years ago

Use the kinetic theory to explain why a windy day is a good drying day?

snow_tiger [21]

Explanation:

Wind helps to get out molecules of water from clothes.

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3 0

2 years ago

Read 2 more answers

How many moles are in 18.2 g of CO2? 41.4 moles 801 moles 0.414 moles 0 2.42 moles

mrs_skeptik [129]

Answer:

0.414 mole (3 sig. figs.)

Explanation:

Given grams, moles = mass/formula weight

moles in 18.2g CO₂(g) = 18.2g/44g/mole = 0.413636364 mole (calc. ans.)

≅ 0.414 mole (3 sig. figs.)

6 0

3 years ago