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3 years ago

Hw to differentiate between alkane and alkene

2 answers:

8 0

An alkane is a carbon-based molecule comprised of only single bonds (-), whereas an alkene is comprised of at least one double bond (=). If a molecule has no double bonds, it can be classified as an alkane, but if it has at least one double bond it can no longer be classified as such.

Hope this helps!

IgorLugansk [536]3 years ago

5 0

Alkenes are unsaturated hydrocarbons which mean they are compounds with one or more double bonds or one or more triple bonds between carbon atoms. Alkenes specifically are those unsaturated hydrocarbons which have at least one double bond. ... They have remained unchanged for millions of years; alkenes are less stable than alkanes and more stable than alkynes; alkynes are more reactive than alkanes and alkenes.

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If the rate of decrease for the partial pressure of N2H4N2H4 in a closed reaction vessel is 70 torr/htorr/h , what is the rate o

german

Answer:

$r_{NH_3}=140torr/h$

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$N_2H_4 (g) + H_2 (g) \rightarrow 2 NH_3$

Thus, in terms of pressures, the rate becomes:

$-r_{N_2H_4}=\frac{1}{2} r_{NH_3}$

Thus, the rate of change for the partial pressure of ammonia turns out:

$r_{NH_3}=2*(-r_{N_2H_4})\\r_{NH_3}=2*[-(-70torr/h)]\\r_{NH_3}=140torr/h$

The rate of decrease of partial pressure of urea is taken negative as it is a reactant whereas ammonia a product which has 2 as its stoichiometric coefficient.

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7 0

3 years ago

An organism contains chloroplasts in its cells which allows it to make its own food. What Kingdom is it in?

Alina [70]

Answer:

Plantae. Plants are multicellular and most don't move, although gametes of some plants move using cilia or flagella. Organelles including nucleus, chloroplasts are present, and cell walls are present. Nutrients are acquired by photosynthesis (they all require sunlight).

8 0

3 years ago

Three moles of oxygen gas is stored in a 2.5-liter container at 35°C. What is the pressure of this gas?

nadezda [96]

Answer:

The pressure of the gas is 30.3072 atm.

Explanation:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

P= ?
V= 2.5 L
n= 3 moles
R= 0.082 $\frac{atm*L}{mol*K}$
T= 35 C= 308 K (being 0 C= 273 K)

Replacing:

P* 2.5 L= 3 moles* 0.082 $\frac{atm*L}{mol*K}$ *308 K

Solving:

$P=\frac{ 3 moles* 0.082 \frac{atm*L}{mol*K} *308 K}{2.5 L}$

P= 30.3072 atm

The pressure of the gas is 30.3072 atm.

4 0

3 years ago

2. What is the mass of 5.3 moles of CaCl2?

Tanya [424]

Answer:

590 g CaCl₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis

Explanation:

Step 1: Define

5.3 mol CaCl₂

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of CaCl₂ - 40.08 + 2(35.45) = 110.98 g/mol

Step 3: Convert

$5.3 \ mol \ CaCl_2(\frac{110.98 \ g \ CaCl_2}{1 \ mol \ CaCl_2} )$ = 588.194 g CaCl₂

Step 4: Check

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

588.194 g CaCl₂ ≈ 590 g CaCl₂

5 0

3 years ago

A sodium flame has a characteristic yellow color due to emissions of wavelength 589 nm. What is the mass equivalence of one phot

Sladkaya [172]

I really don’t know but I’ll tell you soon

8 0

4 years ago