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jek_recluse [69]
4 years ago
11

Determine the pH of a 0.0019 M HNO₃ solution.​

Chemistry
1 answer:
levacccp [35]4 years ago
5 0

Answer:

pH = 2.7

Explanation:

pH = -log[H^+] for HNO3 pH = - log{HNO3]= -log[1.9*10^-3] = 2.7

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Burka [1]

Answer:

Im not sure if im right but i think its Ca

Explanation:

4 0
3 years ago
describe one reason why models of atoms we usually see in textbooks or diagrams are not perfectly accurate representation of rea
nevsk [136]
<h2>"One way atomic models are often inaccurate is <u>that electrons are way smaller than they portray.</u> In reality, atoms <u>have incredibly small electrons.</u>"</h2><h3></h3><h3></h3><h3>A proton is about 1,835 times more massive (mass not size) than an electron. An electron's physical dimensions are so small, that we will never know how small they really are.</h3>
6 0
3 years ago
Identify the variable that is manipulated in an experiment.
Blababa [14]
Independent Variable
 i hope I've helped!
7 0
4 years ago
Read 2 more answers
Determine the number of grams of carbon 3.14x 1023 atoms of carbon
tiny-mole [99]
<h3>Answer:</h3>

6.26 g C

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

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • 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] 3.14 × 10²³ atoms C

[Solve] grams C

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

Avogadro's Number

[PT] Molar Mass of C - 12.01 g/mol

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                      \displaystyle 3.14 \cdot 10^{23} \ atoms \ C(\frac{1 \ mol \ C}{6.022 \cdot 10^{23} \ atoms \ C})(\frac{12.01 \ g \ C}{1 \ mol \ C})
  2. [DA] Multiply/Divide [Cancel out units]:                                                         \displaystyle 6.26227 \ g \ C

<u>Step 4: Check</u>

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

6.26227 g C ≈ 6.26 g C

7 0
3 years ago
Read 2 more answers
What are three chemical changes and what are three physical changes?
choli [55]

Chemical changes:

burning wood

digesting food

mixing acid and base

Physical changes:

breaking a bottle

melting an ice cube

crumbling a sheet of paper

8 0
3 years ago
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