<h2>Answer:</h2>
<u>Both of them believed that</u><u> atoms contained negatively charged electrons. </u>
<h2>Explanation:</h2>
In 1911, Rutherford discovered that atoms have a small charged nucleus which is surrounded by largely empty space, and are circled by tiny electrons. It was known as the Rutherford model or planetary model of the atom. Similarly in 1897, Thomson proved that the cathode rays produced from the cathode were actually a stream of negatively charged particles called electrons. So both of them gave the concept of electrons that they are negatively charged particles.
I think the statement is true. The range of different electromagnetic waves is called the electromagnetic span. It is commonly known as electromagnetic spectrum. This spectrum consists of all the wavelengths of electromagnetic radiation which includes X-rays, radio waves and light. Regions in the spectrum are named depending on the range of the wavelengths.
Answer:
The quantity of salt is "957 lb". A further explanation is given below.
Explanation:
(1)
As we know,
1 hour 40 Min
= 60 min + 40 min
= 100 min
Salt water is going in at the rate of 2 gal/min
Salt water went into the tank in 100 min will be:
=
We have 1.92 lb of salt per gal.
In 200 gal, salt went in 1 hour 40 min will be:
=
=
Now,
ft3 = 7.5 gal
The density of solution will be:
=
=
The solution went out in 100 min 1920 lb as well as going out at 19.2 lb per min.
=
= (salt went out)
The salt remained in the tank at the end of 1 hour 40 min i.e.,
=
=
(2)
As well as the upper limit for the no. of pounds for continues stirring indefinitely per 100 gal will be:
=
<h3>
Answer:</h3>
1.66 × 10²⁴ atoms Al
<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
- 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] 2.75 mol Al
[Solve] atoms Al
<u>Step 2: Identify Conversions</u>
Avogadro's Number
<u>Step 3: Convert</u>
- [DA] Set up:
- [DA] Multiply [Cancel out units]:
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
1.65605 × 10²⁴ atoms Al ≈ 1.66 × 10²⁴ atoms Al
Electromagnetic waves can travel through empty spaces