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3 years ago

Pls help will give brainiest

Chemistry

2 answers:

svet-max [94.6K]3 years ago

7 0

Answer:

The answer is B

Explanation:

The moon is in-between the sun and the Earth during a new moon.

STatiana [176]3 years ago

4 0

Answer is B Give me a thanks please

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This element is used to improve the conductivity of germanium.

Ber [7]

Gallium is used to improve the conductivity of germanium

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3 years ago

The strength of an atom's attraction for the electrons in a chemical bond is the atom's?

Mazyrski [523]

Yes. An element that is highly electronegative pulls more on the electrons in a bond, such as oxygen in H20. This creates a polar bond, where there is a small negative charge on the oxygen, and a small positive charge in between the hydrogens.

Credit goes to "Erin M" answered on yahoo answers a decade ago.

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3 years ago

Propane gas reacts with oxygen according to this balanced equation: C subscript 3 H subscript 8 space (g )space plus space 5 spa

Misha Larkins [42]

Explanation:

The balanced chemical equation of the reaction is:

$C_3H_8(g)+ 5O_2 (g)->3CO_2(g)+4H_2O(g)$

From the balanced chemical equation,

1 mole of propane forms ------ 3 mol. of $CO_2$ gas.

The molar mass of propane is 44.1 g/mol.

One mole of any gas at STP occupies --- 22.4 L.

Hence, 44 g of propane forms (3x22.4 L=) 67.2 L of CO2 gas at STP.

Answer:

Thus, 67.2 L of CO2 is formed at STP.

4 0

3 years ago

How many CaF are in a 1.7x10^25 please I need help fast!!

Gemiola [76]

<h3>Answer:</h3>

28 mol CaF

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

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Chemistry

Atomic Structure

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

<h3>Explanation:</h3>

Step 1: Define

[Given] 1.7 × 10²⁵ molecules CaF

[Solve] moles CaF

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[DA] Set up: $\displaystyle 1.7 \cdot 10^{25} \ molecules \ CaF(\frac{1 \ mol \ CaF}{6.022 \cdot 10^{23} \ molecules \ CaF})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 28.2298 \ moles \ CaF$

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

28.2298 mol CaF ≈ 28 mol CaF

7 0

3 years ago

Differentiate benzene and cyclohexane

slega [8]

• Benzene has the formula of C6H6 whereas cyclohexane has the formula of C6H12.

Benzene is an aromatic compound but cyclohexane is not aromatic.

Benzene is an unsaturated molecule, but cyclohexane is saturated.

Carbon atoms in the benzene ring have sp2 hybridization where carbon atoms in the cyclohexane have sp3 hybridization.

Benzene has a planar structure whereas cyclohexane has chair conformations.

5 0

3 years ago