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Natali5045456 [20]
3 years ago
6

COURSES GROUPS RESOURCES GRADE REPORT Q OOO try: 913322 4 Honors Chemistry Tests/Quizzes ormulas Reactions Quiz Questic Question

1 (2 points) How many atoms of cadmium are found in a 37.8 g sample of the element? Report your answer to 3 significant digits. X1023 atoms of silicon​
Chemistry
1 answer:
Aleks04 [339]3 years ago
6 0

Answer:

2.02 × 10²³ atoms

Explanation:

Step 1: Calculate the moles corresponding to 37.8 g of cadmium

To convert mass to moles, we need a conversion factor: the molar mass. The molar mass of cadmium is 112.41 g/mol.

37.8 g × 1 mol/112.41 g = 0.336 mol

Step 2: Calculate the number of atoms in 0.336 moles of cadmium

To convert moles to atoms, we need a conversion factor: Avogadro's number. In 1 mole of atoms of cadmium, there are 6.02 × 10²³ atoms of cadmium.

0.336 mol × 6.02 × 10²³ atoms/1 mol = 2.02 × 10²³ atoms

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Answer:

KOH + H_2SO_4 \rightarrow K_2SO_4 + H_2O

Explanation:

A chemical reaction describes the reaction between reactants to produce products.

A chemical equation is represented as a reactant present on the left-hand side of the equation if two or more reactants are present they are separated by the "plus" sign.

On the right side of the equation product is written and if more than one product is formed then these are separated by "plus" sign as in the reactants.

The reactant and the products are separated by an arrow, the head of arrow is in the direction of the product when the reaction is irreversible.

In the case of reversible reactions or chemical reactions that are present in equilibrium, the reactant and product are separated by a double-headed arrow.

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3 years ago
Which pattern(s) may be observed from the arrangement of elements in the periodic table? Select all that apply.
Neporo4naja [7]
It’s organized by the atomic number which is the protons so the answer is A although they can be organized through groups and periods if valance electrons are included
6 0
3 years ago
Type the correct answer in the box. Express your answer to three significant figures. Iron(II) chloride and sodium carbonate rea
Ad libitum [116K]

Answer:

The reaction can produce 287 grams of iron(II) carbonate

Explanation:

To solve this question we must find the moles of iron(II) chloride that react. Using the chemical equation we can find the moles of iron(II) carbonate and its mass -Molar mass FeCO3: 115.854g/mol-

<em>Moles FeCl2:</em>

1.24L * (2.00mol / L) = 2.48 moles FeCl2

As 1 mol FeCl2 produce 1 mol FeCO3, the moles of FeCO3 = 2.48 moles

<em>Mass FeCO3:</em>

2.48mol * (115.854g / mol) =

<h3>The reaction can produce 287 grams of iron(II) carbonate</h3>
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Application Question: In Lancaster county, Pennsylvania, it is common for members of the Amish community to use wind mills to pu
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Wind has in it wind energy which is then used to rotate the turbine shaft which is a form of mechanical work and hence possess mechanical energy

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2 years ago
All animals need oxygen gas (O2) for their primary cellular-level functioning. Inside the cell, O2 is split apart into oxygen at
il63 [147K]

Answer:

H₂O (water)

Explanation:

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The oxygen molecule is split in their two atoms of O. The element which has 1 proton and 1 electron is the hydrogen (H). So, when hydrogen reacts with oxygen, they form water (H₂O).

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