Water is continuously changing state and moving from place to place in the water cycle. This diagram shows these processes and movements. (Bro there's no science AHHHH)

Answer: A. B.

Explanation:

Answer:

500 m 495 g  its 900 mL

Explanation:

Answer:

Explanation:

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The compound cobalt(II)oxide is an ionic compound.

Hence, the fact that cobalt II oxide is comprised of a cation and an anion means that it us an ionic compound.

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Explanation: When an atom gains/loses an electron, the atom becomes charged, and is called an ion. Gaining an electron results in a negative charge, so the atom is an anion.

Answer:

498 kj/mol

Explanation:

Chemical reactions occur as a result of bond breaking and bond formation.

The bonds in reactants are broken and atoms are rearranged to form new bonds.

During bond breaking energy is absorbed to break the bonds of reactants while bond formation involves the release of energy during the formation of new bonds.

In our case;

In 1 mole of the Oxygen molecule, there is one O=O bond

Energy absorbed to break O=O is 498 kJ/mol

Therefore, the ΔH required to break all the bonds in one mole of Oxygen(O₂) molecules is 498kJ/mol.

Note that, bond breaking is endothermic since energy is absorbed  from the surroundings.

mark brainliest pls

Answer:

Explanation:

Atoms are the thing that make up molecules and compounds. Molecules contain two or more atoms and are held together by covalent bonds

Answer:

16g of oxygen reacts with 2 g of hydrogen to form 18g of Water

Answer:

up to 120 minutes to digest water and rehydrate your body

1-propanol is the correct answer.

While he was researching and writing that book in the 1860s, Mendeleyev made the discovery that led to his most famous achievement. He noticed certain recurring patterns between different groups of elements and, using existing knowledge of the elements' chemical and physical properties, he was able to make further connections. He systematically arranged the dozens of known elements by atomic weight in a grid-like diagram; following this system, he could even predict the qualities of still-unknown elements. In 1869, Mendeleyev formally presented his discovery of the periodic law to the Russian Chemical Society.

Hope This is Ok :)

Answer:

3rd image

Explanation:

Answer:

b the physical components

We can find the mass of copper by finding the difference between the mass of the crucible and the copper, and just the crucible. This is possible since the mass that is left would be attributed to just the copper.

Mass of copper = (Mass of crucible + copper) - Mass of crucible

                          = 5.92 g - 4.65 g

                          = 1.27 g

The percent purity of your experimental sample is 97.3 %

The percentage purity % = impure value/pure value × 100 %.

Actual value of molar extinction coefficient = impure value = 8171 L/mol-cm, pure value = literature value = 8400 L/mol-cm.

Substituting the values of the variables into the equation, we have

% purity = 8171 L/mol-cm/8400 L/mol-cm ×  100 %

% purity = 0.9727 × 100 %

% purity =  97.27 %

% purity ≅  97.3 %

The percent purity of your experimental sample is 97.3 %

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Answer:

iron .. titanium.. nickel....aluminum... sulfur... and calcium

Answer:

Oxegen

Explanation:

All that oxygen has to come from somewhere. You might already know that it comes from photosynthetic organisms like plants.

El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.

De acuerdo con el enunciado de esta pregunta, debemos encontrar un valor de [tex]m[/tex] a partir del siguiente sistema de ecuaciones:

[tex]r\cdot (r+2) = 4\cdot m \cdot r -8[/tex] (1)

[tex]2\cdot r \cdot (2\cdot r + 2) = 4\cdot m \cdot (2\cdot r) - 8[/tex] (2)

Ahora simplificamos el sistema de ecuaciones:

[tex]r^{2}+2\cdot r = 4\cdot m\cdot r - 8[/tex] (1b)

[tex]4\cdot r^{2}+4\cdot r =8\cdot m\cdot r - 8[/tex] (2b)

Despejamos [tex]m[/tex] en cada expresión, lo eliminamos y resolvemos el polinomio resultante:

[tex]\frac{r^{2}+2\cdot r + 8}{4\cdot r} = \frac{4\cdot r^{2}+4\cdot r +8}{8\cdot r}[/tex]

[tex]r^{2}+2\cdot r + 8 = 2\cdot r^{2}+2\cdot r +4[/tex]

[tex]r^{2}-4 = 0[/tex]

[tex]r^{2} = 4[/tex]

[tex]r = \pm 2[/tex]

Finalmente, determinamos el valor de [tex]m[/tex], que al ser positivo, debemos utilizar [tex]r = 2[/tex]:

[tex]m = \frac{2^{2}+2\cdot 2 + 8}{4\cdot 2}[/tex]

[tex]m = 2[/tex]

El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.

Invitamos cordialmente a ver esta pregunta sobre polinomios de segundo orden: https://brainly.com/question/15792293

Answer:

87 (whatever unit its using)

Noble gases have the maximum number of electrons in their outer shell. The statement made by the student about the stability of noble gases is generally true.

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Answer:

whoa this question is long

Explanation:

how did u write it gosh

Answer:

According to the law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants. A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side

AnswereYs

Explanatioynt:Yes

Answer:

2CHCl3 + 5/2 O2 => 2CO2 + H20 + 3Cl2

Explanation:

Left Hand Side(LHS)

We have CHCl3 and O2

Right Hand Side(RHS)

We have CO2, H2O and Cl2

Balancing

To make sure that they have same values, put 2 before CHCl3 giving 2CHCl3 and 3 on Cl2(RHS) for chlorine gas giving 3Cl2

H2O remains the same

Before CO2 put 2 giving 2CO2

To make sure that oxygen is balanced put 5/2 before it. This gives 5/2 O2 (2 cancels out don't worry)

Combining all;

2CHCl3 + 5/2 O2 => 2CO2 + H20 + 3Cl2

I hope this helps. Have a nice studies.

Out of the answer choices, rubidium has the highest energy valence shell. With a single electron in the fifth energy level, krypton will have the highest number of energy levels of the group I elements listed.

kasama na po jan ang explenation

Answer:

Delocalized electrons

Explanation:

Magnesium Chloride is an ionic compound, so its lattice structure prevents the flow of electrons. However, when you convert the ionic compound into an aqueous solution it allows movement of electrons/ions due to the breakdown of the molecular forces which make it conductible. In short, Ionic compounds as a solid are not conductible but they are in an aqueous form.

Answer:

The reactants of cellular respiration are oxygen and sugar, which are the products of photosynthesis

Explanation:

Answer:

b

Explanation:

Answer:

oxygen, carbondioxide

carbondioxide, oxygen