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2 years ago

Which hypothesis is most supported by astronomers?

Chemistry

1 answer:

sladkih [1.3K]2 years ago

3 0

Answer:

option A is the most supported hypothesis by astronomers

You might be interested in

How many moles are in 3.45g of KCI ?

artcher [175]

<h3>Answer:</h3>

0.0463 mol KCl

<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>

Reading a Periodic Table
Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

3.45 g KCl

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

Molar Mass of K - 39.10 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of KCl - 39.10 + 35.45 = 74.55 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 3.45 \ g \ KCl(\frac{1 \ mol \ KCl}{74.55 \ g \ KCl})$
Multiply/Divide: $\displaystyle 0.046278 \ mol \ KCl$

<u>Step 4: Check</u>

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

0.046278 mol KCl ≈ 0.0463 mol KCl

8 0

3 years ago

As an environmental engineer how would you apply the process of separating mixtures to clean up a polluted beach? What would you

nikdorinn [45]

I did this already and i put this down :3 <span>first you would separate each part of the beach into three zones one for basic cleaning another for harder work and then animal searching and cleaning and release, after that you would begin to work on the sections one by one using certain tools and a large amount of effort being used, then finally you end with a cleaned up beach clean water and safe animals and happy faces from people as well.</span>

6 0

3 years ago

Before we begin, let's first establish an understanding of basic terminology It may be harder than you think lo clearly define w

pentagon [3]

Answer:

oranges: contains chemical

heat: neither

sunlight: neither

photosynthesis: chemical reaction

bleaching protein: contains chemical

neutralization: chemical reaction

combustion: chemical reaction

vitamin K: contains chemical

rainbow: neither

marble: contains chemical

Explanation:

A chemical is a substance that is used in or made by chemical reactions. It is a matter with compositions related to the science of chemistry. In the question,

- orange contains chemical like vitamins, protein molecules etc.

- Bleaching protein contains chemicals that bring about the bleaching process.

- Vitamin k contains chemical elements

- marble contains Calcium, oxygen etc elements

A chemical reaction is that which involves the change in chemical properties of involved substances.

- Photosynthesis is the chemical reaction between carbon dioxide and water in the presence of sunlight to give glucose.

- Neutralization is the chemical reaction where an acid neutralizes a base to form a salt and water molecule.

- Combustion is the chemical reaction involving the burning of a chemical substance.

Some substances like sunlight, heat and rainbow are neither a chemical or chemical reaction.

3 0

3 years ago

HELP NEED HELP PLEASE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Goshia [24]

Answer: B) 4.2 M

Explanation:

Molarity = moles of solute/litre of solution

1560mL/1000 = 1.56 litres

6.5/1.56 = x/1

x = 4.2

M of solution = 4.2

3 0

3 years ago

**EASY**

Svetach [21]

Answer: But because part 2 stays the same

3 0

3 years ago