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3 years ago

What do you notice about these two images

Chemistry

1 answer:

nikdorinn [45]3 years ago

6 0

Answer:

These two images are pictures of the moon. The first one is the moon is in the third quarter. And the second picture is of the moon in the first quarter.

Explanation:

Hope This Helps!!

(brainliest please, if possible)

You might be interested in

What is 0.00996 written in scientific notation

Troyanec [42]

0.00996 in scientific notation is 0.0996e-1.

7 0

3 years ago

Please select the word from the list that best fits the definition Composed of one type of compound molecule compound mixture ch

DaniilM [7]

Answer:

Pure substance

Explanation:

Molecule: contains more atoms of different elements. An example is CO2 molecule. So this option is wrong.

Compound: All compounds are molecules so this option is also wrong.

Mixture: Refers to the union of more than one substances that can be separated.

Chemical and Molecular formular: Represents the constituents of a molecule. This is wrong.

Pure substance: This is the correct option. For an object to be considered pure, it must be composed entirely of one compound.

4 0

3 years ago

The sodium atom loses an electron to form a sodium ion (Na+). Which statement is correct with respect to its atomic radius?

mixer [17]

Its atomic radius increases because there is less electron shielding after the sodium loses one e-. Sodium is a nonmetal which means it forms an anion. Anions always increase from their original atomic radius

3 0

3 years ago

Read 2 more answers

Find the equilibrium value of [CO] if Kc=14.5 : CO (g) + 2H2 (g) ↔ CH3OH (g) Equilibrium concentrations: [H2] = 0.322 M and [CH3

Annette [7]

Answer:

The equilibrium value of [CO] is 1.04 M

Explanation:

Chemical equilibrium is the state to which a spontaneously evolving chemical system, in which a reversible chemical reaction takes place. When this situation is reached, it is observed that the concentrations of substances, both reagents and reaction products, they remain constant over time. That is, the rate of reaction of reagents to products is the same as that of products to reagents.

Reagent concentrations and products in equilibrium are related by the equilibrium constant Kc. Being:

aA + bB ⇔ cC + dD

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

Then this constant Kces equals the multiplication of the concentrations of the products raised to their stoichiometric coefficients between the multiplication of the concentrations of the reactants also raised to their stoichiometric coefficients.

In this case:

$Kc=\frac{[CH_{3}OH ]}{[CO]*[H_{2} ]^{2} }$

You know:

Kc= 14.5
[H₂]= 0.322 M
[CH₃OH] =1.56 M

Replacing:

$14.5=\frac{1.56}{[CO]*0.322^{2} }$

Solving:

$[CO]=\frac{1.56}{14.5*0.322^{2} }$

[CO]= 1.04 M

The equilibrium value of [CO] is 1.04 M

8 0

3 years ago

If 50% of a radioactive element remains after 4000 years, what is the half-life?

ANTONII [103]

Hey there!

A half-life means after a certain amount of time, half of that substance will be gone/changed after that time.

If 50%, or half, of the element remains after 4000 years, that means the half life must be 4000 years.

Hope this helps!

4 0

4 years ago