please guys help me with number 1 ​

Answer:

a measure of hotness or coldness expressed in terms of a scale like Fahrenheit or Celcius

Answer:

Look at the screenshot below.

Those are your answers!

Good Luck.

Explanation:

The number of valence electrons for neutral atoms is the same as the number of the atom's main group.A periodic table element's column can be used to determine its main group number.For instance, carbon, which belongs to group 4, has four valence electrons.

Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements?

       To learn more about periodic table refer

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        #SPJ2

English:

"Human activities contribute to climate change by causing changes in Earth's atmosphere in the amounts of greenhouse gas- es, aerosols (small particles), and cloudiness. The largest known contribution comes from the burning of fossil fuels, which releases carbon dioxide gas to the atmosphere." (ei.lehigh.edu)

Have a nice day!

  I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

/

Español:

"Las actividades humanas contribuyen al cambio climático al provocar cambios en la atmósfera de la Tierra en las cantidades de gases de efecto invernadero, aerosoles (partículas pequeñas) y nubosidad. La mayor contribución conocida proviene de la quema de combustibles fósiles, que libera dióxido de carbono a la atmósfera." (ei.lehigh.edu)

¡Que tenga un lindo día!

  Espero que esto sea lo que estás buscando, pero si no, ¡comenta! Editaré y actualizaré mi respuesta en consecuencia. (ノ^∇^)

- Heather

The quantity of the product that was formed was 5g

From the question,

We are to determine the quantity of product formed. That is, the actual yield.

Using the formula

[tex]Percentage \ yield =\frac{Actual \ yield}{Theoretical\ yield} \times 100\%[/tex]

From the given information

Theoretical yield = 10g

Percentage yield = 50%

Putting the parameters into the formula, we get

[tex]50\% = \frac{Actual\ yield}{10} \times 100\%[/tex]

Then,

[tex]50\% = Actual\ yield \times 10\%[/tex]

∴ Actual yield = [tex]\frac{50\%}{10\%}[/tex]

Actual yield = 5g

Hence, the quantity of the product that was formed was 5g

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Answer:

20c answer is 20c hiuyffddffffy

Answer:

17000

J

(2 significant figures

Answer:

addition reactions, elimination reactions, substitution reactions, pericyclic reactions, rearrangement reactions, photochemical reactions and redox reactions

Answer:

Scientists use models to study atoms because atoms are extremely small and can't even be seen. If atoms can't be seen, it's easier to study and.

Explanation:

hope it helps you

Answer:

43.7mol

Explanation:

[tex]?mol = 7.86kg * \frac{1000g}{1kg} *\frac{1mol}{180g}[/tex]

Above is dimensional analysis method. Write what you are trying to find with the question mark and write your given info on the other side of the equal sign. Follow the units and pay attention to them cancelling out. You should have your answer unit by the end.

the 180g came from the table with masses times the chemical formula all added together. Below is exact formula.

hydrogen mass(hydrogen amount) + carbon mass(carbon amount) + oxygen mass(oxygen amount)

1g(8)+12g(9)+16g(4)=180g

180g is 1 mole of [tex]C_{9} H_{8} O_{4}[/tex]

Answer:

The frequency of blue light that has a wavelength of 450 nm is 6.7×1014 6.7 × 10 14 Hz.

Explanation:

BRAINLIEST?

Answer:

Nuclear fusion of hydrogen to form helium occurs naturally in the sun and other stars. It takes place only at extremely high temperatures. That's because a great deal of energy is needed to overcome the force of repulsion between the positively charged nuclei.

Explanation:

hope it helps

Answer:The first thing you need to do is calculate the molar mass of C4H10.

Explanation:

Answer:

FeO₂

Explanation:

hAVE A nice day

Explanation:

If we assume it's FexOy

Fe : O

70 : 30. (mass ratio)

x:y = 70/56 : 30/16. (mole ratio)

1.25 : 1.875

= 1.25/1.25: 1.875/1.25

= 1 : 1.5

=2 : 3

Therefore It's Fe2O3

Answer: Nonpolar Covalent Bond

Explanation: A Nonpolar Covalent Bond is created when atoms share their electrons equally. This usually occurs when two atoms have similar or the same electron affinity. The closer the values of their electron affinity, the stronger the attraction. This occurs in gas molecules; also known as diatomic elements.

Answer:

I'm thinking the answer is gonna be it slows it down as it runs down hill

A grounding electrode is any object that directly links to the earth. They are most times used to divert electricity from the elements.

In code 250.52(B)(3) it is clearly specified that the bonding grid and reinforcing steel that is related to a pool should not be used as grounding electrodes.

This is essential because when a metal that lies beneath a swimming pool is used as a grounding electrode, current from nearby electrical systems can be introduced into the pool.

This could cause the electrocution of anybody in the swimming pool at that time.

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I'm sorry I'm not sure of my answer so I am not gonna give you the answe

The electron domain geometry is trigonal bipyramidal while the molecular geometry of the compound is seesaw.

The shapes of molecules is determined by the number of electron pairs on the valence shell of the central atom in the molecule. These electron domains include lone pairs and bond pairs.

The lone pairs only contribute towards the electron domain geometry and not the molecular geometry. SCl4 has five electron domains hence its electron domain geometry is trigonal bipyramidal. The molecular geometry of the compound is seesaw.

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Correct:

Incorrect:

Carbon dioxide is the waste product of cells that you let out each time you breathe.

Por definición de molaridad y densidad, la molaridad de la solución es 1.66 [tex]\frac{moles}{litros}[/tex].

La concentración molar o molaridad es una medida de la concentración de un soluto en una disolución que indica el número de moles de soluto que están disueltos en un determinado volumen.

La molaridad de una solución se calcula dividiendo los moles del soluto por el volumen de la solución:

[tex]Molaridad=\frac{numero de moles de soluto}{volumen}[/tex]

La Molaridad se expresa en las unidades [tex]\frac{moles}{litros}[/tex].

Por otro lado, la densidad es una magnitud que permite medir la cantidad de masa que hay en determinado volumen de una sustancia.

Entonces, la expresión para el cálculo de la densidad es el cociente entre la masa de un cuerpo y el volumen que ocupa:

[tex]densidad=\frac{masa}{volumen}[/tex]

En este caso, siendo H₂S el soluto, se colocaron 37 ml del ácido, siendo su densidad 1.36 [tex]\frac{g}{mL}[/tex]. Reemplazando en la definición de densidad se obtiene:

[tex]1.36\frac{g}{mL}=\frac{masa}{37 mL}[/tex]

masa= 1.36 [tex]\frac{g}{mL}[/tex]× 37 mL

masa= 50.32 g

Siendo 34 g/mol la masa molar de H₂S, es decir la cantidad de masa que una sustancia contiene en un mol, la cantidad de moles de H₂S puede ser calculada como:

[tex]numero de moles de H_{2}S= 50.32 grams\frac{1 mole}{34 grams}[/tex]

número de moles de H₂S= 1.48 moles

Siendo 890 mL=0.890 L el volumen de la solución, entonces la molaridad puede ser calculada como:

[tex]Molaridad=\frac{1.48 moles}{0.890 L}[/tex]

Molaridad= 1.66 [tex]\frac{moles}{litros}[/tex]

Finalmente, la molaridad de la solución es 1.66 [tex]\frac{moles}{litros}[/tex].

Aprende más:

Answer: 7

Explanation:

8%

Explanation:

In a DNA molecule the no. of Adenine bases equal to that of Thymine bases

The no. of Cytosine bases equal to that of Guamine bases.

If we take no. of Thymine bases as x and no. of Cytosine bases as y,

Adenine + Thymine + Cytosine + Guamine = 100

x + x + y+y = 100

2( x+y) = 100

x+y = 50

y=42

therefore x= 50-42 = 8%

Answer:

The temperature will rise as a matter of fact

Explanation:

Heat is the type of energy that travels from one point to another owing to temperature difference.

Answer:

okay your question in science

The liquified (/molten) MgCl₂ dissociates into Mg²⁺ and Cl⁻ ions;

The Cl⁻ ions are drawn to the positive electrode (which has a deficit of electrons) where they deposit electrons since they are negatively charged;

This yields Cl atoms (these will form Cl₂ gas by covalent bonding and bubbles will be seen as this gas rises out of the liquid and it will enter the air);

These electrons will flow from the positive electrode to the negative electrode;

The Mg²⁺ ions, conversely, will be drawn to the negative electrode or cathode (which has a surplus of electrons partly from those the Cl⁻ ions lose) where they pick up electrons since they have a positive charge;

This yields pure magnesium.

The magnesium has been produced with the application of electric current for the production of ions that accumulate at the electrodes.

The setup has been for the electrochemical process. The sample in the molten state has been applied with the electric current. The current results in the dissociation of the sample into ionic constituents.

The opposite charge attracts negative charge. Thus, the negative ion moves towards the positive electrode, and negative ion move towards the positive electrode. The accumulation of ions has been obtained from the electrodes.

The magnesium chloride under the influence of electric field has been converted into the positive Mg ions and negative Cl ions. The positive Mg ion will move towards the negative electrode, and thus Mg has been produced.

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Answer:

What is cyclobutane empirical formula : C4H8

Explanation:

Answer:

Explanation:

Ammonia

It's chemical formula is NH3

Answer:

ammonia

Explanation:

Answer:

1.Phenolphthalein

2.Method

a.Use the pipette and pipette filler to add 25 cm 3 of alkali to a clean conical flask.

b.Add a few drops of indicator and put the conical flask on a white tile.

c.Fill the burette with acid and note the starting volume.

d.Slowly add the acid from the burette to the alkali in the conical flask, swirling to mix.

Explanation: