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3 years ago

Where do you put the value for how many of each atom you need?

Chemistry

1 answer:

prisoha [69]3 years ago

4 0

Answer:A

Explanation

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1) How many atoms are in 0.54 moles of Cu? show work

mario62 [17]

<h3>Answer:</h3>

3.3 × 10²³ atoms Cu

<h3>General Formulas and Concepts:</h3>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Moles
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 0.54 moles Cu

[Solve] atoms Cu

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 0.54 \ mol \ Cu(\frac{6.022 \cdot 10^{23} \ atoms \ Cu}{1 \ mol \ Cu})$
[DA] Multiply [Cancel out units]: $\displaystyle 3.25188 \cdot 10^{23} \ atoms \ Cu$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

3.25188 × 10²³ atoms Cu ≈ 3.3 × 10²³ atoms Cu

7 0

3 years ago

A ball has 2 kg* m/s of momentum when thrown with a velocity of 8 m/s outwards. Find the mass of the ball.

Advocard [28]

Answer:

$\large \boxed{\text{0.25 kg}}$

Explanation:

We can use the formula for momentum to calculate the mass.

$\begin{array}{rcl}p & = & mv\\2 & = & m \times 8\\m & = & \dfrac{2}{8}\\\\& = & \textbf{0.25 kg}\\\end{array}\\\text{The mass of the ball is $\large \boxed{\textbf{0.25 kg}}$}$

8 0

3 years ago

Which subatomic particle has no electric charge?

posledela

Answer:

neutrons are uncharged and electrons are negatively charged

5 0

4 years ago

Read 2 more answers

What is the volume of 0.80 grams of O2 gas at STP?

frez [133]

Answer:

The volume of 0.80 grams of O2 is 0.56 L

Explanation:

Step 1 : Data given

Mass of O2 = 0.80 grams

Molar mass of O2 = 32 g/mol

STP = 1 mol, 1atm, 22.4 L

Step 2: Calculate moles of oxygen

Moles of O2 = Mass of O2 / molar mass of O2

Moles O2 = 0.80 grams / 32 g/mol

Moles O2 = 0.025 moles

Step 3: Calculate volume of O2

1 mol = 22.4 L of gas

0.025 moles = 0.025*22.4L = 0.56 L

The volume of 0.80 grams of O2 is 0.56 L

5 0

4 years ago

Read 2 more answers

Match the element with its description. Match Term Definition Lithium A) Highly reactive gas Lead B) Nonreactive gas Fluorine C)

eduard

Lithium - Malleable, soft, and shiny

Lead - Opaque solid with higher density

Fluorine - Highly reactive gas

Krypton - Nonreactive gas

*<em>hope I helped :)</em>*

6 0

3 years ago