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3 years ago

The atomic number of an element is the same as its _________________.

Chemistry

2 answers:

padilas [110]3 years ago

8 0

Answer:

protons

Explanation:

Vladimir79 [104]3 years ago

5 0

D. Protons
<span>The number of protons in the nucleus of every atom in an element is always the same as the atomic number of the element~! Hope this helped~ : )</span>

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How many molecules of carbon dioxide are in 5.61 moles of carbon dioxide (CO2)?

gulaghasi [49]

<h3>Answer:</h3>

3.38 × 10²⁴ molecules CO₂

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

<u>Math</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

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] 5.61 moles CO₂

[Solve] molecules CO₂

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

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 5.61 \ mooles \ CO_2(\frac{6.022 \cdot 10^{23} \ molecules \ CO_2}{1 \ mol \ CO_2})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 3.37834 \cdot 10^{24} \ molecules \ CO_2$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

3.37834 × 10²⁴ molecules CO₂ ≈ 3.38 × 10²⁴ molecules CO₂

6 0

3 years ago

Which of the following is NOT a renewable energy source?

scoundrel [369]

I think Geothermal but I’m not 100% sure

3 0

3 years ago

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Which statement best describes how sediment forms?

Anit [1.1K]

Weathering breaks down rock and other material

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3 years ago

A correct statement of Henry's law is: a. The concentration of a gas in solution is inversely proportional to temperature. b. Th

AVprozaik [17]

Answer:

e. None of these.

Explanation:

Hey there!

In this case, since the Henry's law is defined in terms of pressure, henry's constant and pressure, as shown below:

$C=K_H*P$

Whereas C is the concentration, KH the Henry's constant and P the pressure, we infer that the concentration of a gas solution is directly proportional to the pressure, which is not the group choices, therefore, the answer is e. None of these.

Best regards!

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2 years ago

What is the limiting reactant when 5.6 moles of aluminum react with 6.2 moles of water?

alexira [117]

The limiting reactant when 5.6 moles of aluminium react with 6.2 moles of water is

water( H2O)

<u><em>Explanation</em></u>

The balanced equation is as below

2 Al +3 H2O → Al2O3 +3 H2

The mole ratio of Al :Al2O3 is 2:1 therefore the moles of Al2O3

= 5.6 x1/2 = 2.8 moles

The mole ratio of H2O: Al2O3 is 3:1 therefore the moles of Al2O3 produced

= 6.2 x1/3= 2.067 moles

since H2O yield less amount of Al2O3 , H2O is the limiting reagent.

7 0

3 years ago

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