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3 years ago

After an investigation, what do scientists often do?

Chemistry

1 answer:

den301095 [7]3 years ago

7 0

Record observations, pose a question, create a test for an individual variable, test, come to a conclusion

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How many moles of iron is 6.022 x 10^22 atoms of iron? (Report answer as a number rounded to one place past the decimal.) *

yuradex [85]

<h3>Answer:</h3>

$\displaystyle 0.1 \ mol \ Fe$

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

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<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>

6.022 × 10²² atoms Fe (iron)

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

Avogadro's Number

<u>Step 3: Convert</u>

Set up: $\displaystyle 6.022 \cdot 10^{22} \ atoms \ Fe(\frac{1 \ mol \ Fe}{6.022 \cdot 10^{23} \ atoms \ Fe})$
Divide: $\displaystyle 0.1 \ mol \ Fe$

7 0

3 years ago

Which of these is NOT a layer of the skin?

bagirrra123 [75]

I need the options to choose from

4 0

2 years ago

Read 2 more answers

Which of the following is true about a system at equilibrium? a The concentration(s) of the reactant(s) is equal to the concentr

anyanavicka [17]

Answer:

c The concentration(s) of reactant(s) is constant over time.

Step-by-step explanation:

When the reaction A ⇌ B reaches equilibrium, the concentrations of reactants and products are constant over time.

a is <em>wrong</em>, because the concentrations of reactants and products are usually quite different.

b is <em>wrong</em>, because both product and reactant molecules are being formed at equilibrium.

d is <em>wrong</em>. The rates of the forward and reverse reactions are equal, but they are not zero.

6 0

3 years ago

Which temperature scale does not possess negative values? A. Fahrenheit B. Celsius C. Kelvin D. No temperature scale has negativ

dimaraw [331]

Kelvin doesn't have negativity iim pretty sure

8 0

3 years ago

Genetic information is encoded in a molecule called DNA?

grandymaker [24]

True

Explanation:

The DNA is the structure in living organisms that encodes genetic information.

DNA = DeoxyriboNucleic Acid.

The DNA is made up of a double helix structure of two strands.
It is made up of a phosphate group,deoxyribose sugar and four nitrogenous bases.
The DNA is contained in the nucleus of every cell.
Crick and Watson suggested the molecular structure of the DNA to be a double helix shape.

learn more:

Genetic recombination brainly.com/question/12685192

#learnwithBrainly

7 0

3 years ago