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3 years ago

Which statement is TRUE about liquid and gases? *

Chemistry

1 answer:

Levart [38]3 years ago

5 0

Answer:

The Answer is gonna be d. They assume the shape of container

This is the right Answer

I hope you are having a great day :3

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A sugar crystal contains approximately 1.2×1017 sucrose (C12H22O11) molecules.

xxMikexx [17]

Answer:

0.12 mg

Explanation:

Data Given:

no. of molecules of Sucrose (C₁₂H₂₂O₁₁) = 1.2×10¹⁷

mass in mg = ?

Solution:

First we have to find no. of mole

Formula used

no. of mole = no. of molecules / Avogadro's number

Where

Avogadro's number = 6.022 x 10²³

Put values in above formula

no. of mole = 1.2×10¹⁷ / 6.022 x 10²³

no. of mole = 3.5×10⁻⁷

Now we have to find mass of sucrose

For this formula will use

mass in grams = no. of moles x Molar mass . . . . . .(1)

Formula of Sucrose = C₁₂H₂₂O₁₁

Molar mass of C₁₂H₂₂O₁₁ (Sucrose) = 12(12) +22(1) +11(16)

Molar mass of C₁₂H₂₂O₁₁ (Sucrose) = 144 +22 + 176

Molar mass of C₁₂H₂₂O₁₁ (Sucrose) = 342 g/mol

put values in equation 1

mass in grams = 3.5×10⁻⁷ x 342 g/mol

mass in grams = 1.2 x 10⁻⁴ g

Convert g to mg

1 g = 1000 mg

1.2 x 10⁻⁴ g = 1.2 x 10⁻⁴ x 1000 = 0.12 mg

mass of C₁₂H₂₂O₁₁ (Sucrose) = 0.12 mg

7 0

3 years ago

PLEASE HELP! DUE IN 5 MINS SUPER EASY CHEMISTRY!!

lbvjy [14]

Answer:

Explanation:

Since they all are 2 mols worth, all you have to do is count the number of atoms in each molecule

H2SO4 contains 2 hydrogen 1 sulfur 4 oxygen = 7 atoms

H2S contains 2 hydrogen and 1 sulfur = 3 atoms

H3PO4 contains 3 hydrogens 1 phosphorus 4 oxygens = 8 atoms

HNO3 contains 1 hydrogen 1 nitrogen and 3 oxygens = 5 atoms

You have the right answer.

5 0

3 years ago

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

How does a scientist make two solutions with the same molarity? A By dissolving the maximum amount of each substance in the B. B

aalyn [17]

Answer: The answer is “ By dissolving the same number of nmoles of each substance in the same volume of water ”

Explanation:

7 0

4 years ago

A glass column is filled with mercury and inverted in a pool of mercury. The mercury column stabilizes at a height of 729 mm abo

harkovskaia [24]

The atmospheric pressure will be:

The pressure of the atmosphere resulting from the mercury column is 0.959 atm

What is atmospheric pressure?

The force that an object experiences from the weight of the air above it per unit area are known as atmospheric pressure.

Given: Height of mercury column = 729 mm Hg

To find: The pressure of the atmosphere

Calculation:

The atmospheric column resulting from the mercury column is calculated as follows:

1 atm =760 mm Hg

So, we can convert the 729 mm Hg to atm, and we get

Atmospheric pressure = 729 x 1 atm / 760 = 0.959 atm

Learn more about atmospheric pressure here,

brainly.com/question/14315894

#SPJ4

5 0

2 years ago