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3 years ago

Can someone please help with this ASAP :):):):):):):):):):):):):):)

Chemistry

1 answer:

GalinKa [24]3 years ago

7 0

Answer:

u just put T and t in all of the boxes

Explanation:

like this

T t

and see how many times you get a dominant one which is 2 T T

i dont know if u understand I took this a long time ago i forgot my bad if it's hard to understand

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Explain the role light plays on the rate<br> of photosynthesis.

Luda [366]

Answer:

The process of photosynthesis occurs when green plants use the energy of light to convert carbon dioxide (CO2) and water (H2O) into carbohydrates. Light energy is absorbed by chlorophyll, a photosynthetic pigment of the plant, while air containing carbon dioxide and oxygen enters the plant through the leaf stomata.

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3 years ago

Iron and oxygen react together to make iron (III) oxide (rust). You know that this is a chemical reaction and not a nuclear reac

Alona [7]

The atoms didn't change we only added 2 different ones together. 2nd one is right

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3 years ago

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4. How many moles of gold (Au) are in a pure gold nugget having a mass of 25.0 grams.

ikadub [295]

<h3>Answer:</h3>

0.127 mol Au

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

<u>Math</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
Moles

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 25.0 g Au

[Solve] moles Au

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

[PT] Molar Mass of Au - 196.97 g/mol

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 25.0 \ g \ Au(\frac{1 \ mol \ Au}{196.97 \ g \ Au})$
[DA] Multiply/Divide [Cancel out units: $\displaystyle 0.126923 \ mol \ Au$

<u>Step 4: Check</u>

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

0.126923 mol Au ≈ 0.127 mol Au

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3 years ago

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What is the empirical formula for a compound that is 43.6% phosphorus

Kazeer [188]

Answer:

d. P2O5.

Explanation:

We find the ratio of the atoms by dividing the percentages by the relative atomic masses:

P : 43.6 / 30.974 = 1.4076

O: 56.4 / 15.999 = 3.5252

1.4076 : 3.5252

= 1 : 2.5

= 2:5.

So the answer is P2O5.

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3 years ago

Which best describes the motion of molecules in the gaseous state?

artcher [175]

Answer:

They spread apart to fill the enclosed object. In other words they move freely...

hope this helped you

please mark as the brainliest(ㆁωㆁ)

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3 years ago