Answer:
C )
Explanation:
Controlled scientific experiment tests scientific assumption (hypothesis), under controlled conditions.
In controlled scientific experiment, alters the test variable (independent variable) and observes the effects on the outcome variable (dependent variable).
Eg : Studying impact of sunlight on plant's group, where former independent variable is altered & its effects on dependent outcome variable is observed.
Answer:
In everyday use, "theory" frequently implies an untested hunch, or a supposition without supporting proof. For scientists, a theory has about the contrary significance. A hypothesis is a very much validated clarification of am aspect of the natural world that can join laws, speculations and realities.
Explanation:
I hope this helps!
<h3>
Answer:</h3>
6.96 × 10²³ molecules NaNO₃
<h3>
General Formulas and Concepts:</h3>
<u>Math</u>
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Chemistry</u>
<u>Atomic Structure</u>
- Reading a Periodic Table
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<h3>
Explanation:</h3>
<u>Step 1: Define</u>
98.2 g NaNO₃
<u>Step 2: Identify Conversions</u>
Avogadro's Number
Molar Mass of Na - 22.99 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of NaNO₃ - 22.99 + 14.01 + 3(16.00) = 85.00 g/mol
<u>Step 3: Convert</u>
- Set up:
- Multiply:
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
6.95718 × 10²³ molecules NaNO₃ ≈ 6.96 × 10²³ molecules NaNO₃
Answer:
Coal
Explanation:
Coal is composed of the remains of dead animals and plants, being pressed down over the course of thousands of years.
(Also can I please have Brainliest? I need it to level up)
1. Should know the Atomic Number of each element (also equal to the number of protons
2. Should know the Mass number (equals to protons + neutrons)
3. Should know the element's symbol or abbreviation (e.g. C for carbon, Ar for argon etc.)
4. Should know the number of electrons