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3 years ago

What is the difference between an element and a compound?

Chemistry

2 answers:

dsp733 years ago

8 0

D. Would be the correct answer :)

sashaice [31]3 years ago

6 0

D.
im not completely sure but i did the process of elimination. it’s not B because an element is one type of atom. it’s not A because both elements and compounds are pure substances. and it’s not C because it’s not in mixed composition

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Pls answer fast. thanks !

seraphim [82]

Answer:

Yes

Explanation:

If Mg + 2HCI is Blanced then MgCI2 + H2 is also Blanced . So yes

7 0

3 years ago

Consider the following chemical reaction: H2 (g) + I2 (g) 2HI (g) At equilibrium in a particular experiment, the concentrations

bearhunter [10]

The question is incomplete, here is the complete question:

Consider the following chemical reaction: H₂ (g) + I₂ (g) ⇔ 2HI (g) At equilibrium in a particular experiment, the concentrations of H₂, I₂, and HI were 0.15 M, 0.033 M and 0.55 M respectively. The value of Keq for this reaction is

<u>Answer:</u> The value of $K_{eq}$ for the given reaction is 61.11

<u>Explanation:</u>

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_[eq}$

For a general chemical reaction:

$aA+bB\rightarrow cC+dD$

The expression for $K_{eq}$ is written as:

$K_{eq}=\frac{[C]^c[D]^d}{[A]^a[B]^b}$

For the given chemical equation:

$H_2(g)+I_2(g)\rightleftharpoons 2HI(g)$

The expression of $K_{eq}$ for above equation follows:

$K_{eq}=\frac{[HI]^2}{[H_2][I_2]}$

We are given:

$[HI]_{eq}=0.55M$

$[H_2]_{eq}=0.15M$

$[I_2]_{eq}=0.033M$

Putting values in above expression, we get:

$K_{eq}=\frac{(0.55)^2}{0.15\times 0.033}\\\\K_{eq}=61.11$

Hence, the value of $K_{eq}$ for the given reaction is 61.11

4 0

4 years ago

1. What is the kinetic energy of 44 kg cheetah running at 31m/s speed?

Vanyuwa [196]

Explanation:

Given

mass (m) = 44 kg

velocity (v) = 31 m/s

Now

Kinetic energy

= 1/2 mv²

= 1/2 * 44 * 31²

= 0.5 * 44 * 961

= 21142 joule

Hope it will help you :)

3 0

3 years ago

During which stage of the water cycle could water enter the atmosphere as a gas? A. transpiration B. precipitation C. accumulati

Fantom [35]

Answer: Transpiration---A

Explanation: Transpiration is the process in the water cycle whereby plant loose(excess) water by evaporation through the stomata of their leaves since not all water absorbed by the root is actually used for growth in plants.In order to allow the intake of carbon-dioxide, water must exit the leaves through transpiration which then provides the plant with cooling, rigidity and maintaining the overall water balance of the plant.

8 0

3 years ago

The formula for acetic acid is CH3COOH(aq). How many of each type of atom are there in this molecule?

miss Akunina [59]

C) is the right answer

5 0

4 years ago