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yawa3891 [41]
2 years ago
14

PLEASE help i will give brainly if someone answers A pleeease help it will help me answer my other questions

Chemistry
1 answer:
Sedaia [141]2 years ago
6 0

Answer:

a.Archaeopteryx

b.Archaeopteryx had more in common with other small Mesozoic dinosaurs than with modern birds.Archaeopteryx was generally accepted by palaeontologists and popular reference books as the oldest known bird.Archaeopteryx could grow to about 0.5 m (1 ft 8 in) in length.

I hope it help

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A) State the Law of Conservation of Matter.​
Mariulka [41]

Answer:

matter can either be created nor destroyed but can be transmitted fromone state to another state

4 0
3 years ago
For the reaction 2A(g) â B(g), the equilibrium constant is Kp = 0.76. A reaction mixture initially contains 4.0 atm of gas (PA =
timofeeve [1]

Answer: (a) The reaction mixture will proceed toward products.

Explanation:

Equilibrium constant is defined as the ratio of pressure of products to the pressure of reactants each raised to the power their stoichiometric ratios. It is expressed as K_p

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

2A(g)\rightleftharpoons B(g)

The expression for Q_p is written as:

Q_p=\frac{p_B}{(p_A)^2}

Q_p=\frac{(2.0)}{(2.0)^2}

Q_p=0.5

K_p=0.76

Thus as K_p>Q_p , the reaction will shift towards the right i.e. towards the product side.

7 0
3 years ago
3. A helium laser emits light with a wavelength of 6.33 x 10^-7m. What is
HACTEHA [7]

Answer:

4.52 x 10¹⁴ cycles/s

Explanation:

From c = f·λ => f = c/λ = (3.0 x 10⁸ m/s)/(6.63 x 10⁻⁷m) = 4.52 x 10¹⁴ cycles/s.

f = frequency = ?

λ = wavelength = 6.63 x 10⁻⁷ meter

c = speed of light in vacuum = 3.0 x 10⁸ meters/s

7 0
3 years ago
Select the compound in which chlorine is assigned the oxidation number +5.
Ad libitum [116K]
The answer is d.
Hope this helps plz give brainliest!
8 0
3 years ago
Read 2 more answers
Why does ice get colder when you melt it?
galina1969 [7]
It doesn't?

Heat transfers from hot objects to cold objects and for ice to melt it has to increase the temperature.
8 0
4 years ago
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