3 years ago

Which physical property can be used to classify oxygen, helium, propane, and hydrogen as being similar?

Chemistry

1 answer:

PSYCHO15rus [73]3 years ago

4 0

Answer:

state of matter

Explanation:

Because there are three state of matter namely:liquid,solid and gas and oxygen is a gas.

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What reaction is C+O2=CO2

slamgirl [31]

Answer:

Combination or synthesis

Explanation:

The reaction given below:

C + O₂ → CO₂

The reaction above is termed a synthesis or combination reaction because two substances are combining to give a product.

A synthesis reaction involves the formation of a single product from two or more reactants.
The driving force for such reaction is the large and negative heat of formation of the product.

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3 years ago

Drag force is directly proportional to ______. velocity. thrust shorter and faster blades longer and slower blades

aniked [119]

Answer:

Drag force is directly proportional to squared velocity

Explanation:

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2 years ago

Imagine a rock comprised entirely of an unstable isotope. After three half-lives, how much of the parent isotope remains

uysha [10]

Answer: After three half-lives 1/8 (12.5%) of the original sample remains

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2 years ago

In the reaction, A → Products, the rate constant is 3.6 × 10−4 s−1. If the initial concentration of A is 0.548 M, what will be t

Arada [10]

Answer:

$\large\boxed{\large\boxed{0.529M}}$

Explanation:

Since the <em>rate constant</em> has units of <em>s⁻¹</em>, you can tell that the order of the reaction is 1.

Hence, the rate law is:

$r=d[A]/dt=-k[A]$

Solving that differential equation yields to the well known equation for the rates of a first order chemical reaction:

$[A]=[A]_0e^{-kt}$

You know [A]₀, k, and t, thus you can calculate [A].

$[A]=0.548M\times e^{-3.6\cdot 10^{-4}/s\times99.2s}$

$[A]=0.529M$

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3 years ago

Which of the following is not a type of mechanical wave?

Otrada [13]

Concave is not a type of mechanical wave because it doesn’t need a medium for propagation.

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3 years ago

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