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2 years ago

Which statement is true about a catalyst?

Chemistry

2 answers:

pentagon [3]2 years ago

7 0

Answer:

The answer is D. It changes the final products of the reaction. .

Explanation:

. Catalyst is a substance that increases the rate of a reaction without itself being consumed.

kvasek [131]2 years ago

4 0

Answer:

Explanation:

Catalysts help a reaction procede to the final products, but catalysts do not get used ( think of the catlytic converter in cars' exhaust systems)

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How many molecules are in 1.2 L of CH4 at STP?

erastovalidia [21]

Answer: 4.48L of CH4 at STP is equal to 1.2×10^23 molecules

Explanation:

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3 years ago

PLEASE HELP!!

jeka57 [31]

I think it is C. i took a quiz on that.

3 0

3 years ago

Rank the following alkenes in order of increasing stability of the double bond towards addition of HBr:

ASHA 777 [7]

Answer:

2,3-dimethyl-2-butene > 3-methyl-3-hexene > cis-3-hexene > 1-hexene

Explanation:

According to Saytzeff rule, the more highly substituted an alkene is, the more stable it is. Since this is so, 2,3-dimethyl-2-butene will be the most stable of all the alkenes listed because it is the most substituted alkene.

Let us also note that terminal alkenes are the least stable because the pi bonds of the alkenes are least stabilized by alkyl groups. This implies that 1-hexene is the least stable alkene among the listed alkenes.

6 0

3 years ago

Lattice energy is an estimate of the bond conductivity group length strength

pashok25 [27]

Answer:

Lattice energy is an estimate of the bond strength.

5 0

3 years ago

Read 2 more answers

How many atoms are in a 158.69 g sample of nickel?

Alchen [17]

<h3>Answer:</h3>

1.6283 × 10²⁴ atoms Ni

<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

Reading a Periodic Table
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Use Dimensional Analysis

<h3>Explanation:</h3>

Step 1: Define

158.69 g Ni

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Ni - 58.69 g/mol

Step 3: Convert

Set up: $\displaystyle 158.69 \ g \ Ni(\frac{1 \ mol \ Ni}{58.69 \ g \ Ni})(\frac{6.022 \cdot 10^{23} \ atoms \ Ni}{1 \ mol \ Ni})$
Multiply/Divide: $\displaystyle 1.62827 \cdot 10^{24} \ atoms \ Ni$

Step 4: Check

Follow sig fig rules and round. We are given 5 sig figs.

1.62827 × 10²⁴ atoms Ni ≈ 1.6283 × 10²⁴ atoms Ni

8 0

3 years ago