chemistry neeeeeeed help!

Answer:

Groups: The vertical column of the periodic table that signifies the number of valence electrons in an element.

Period: The horizontal rows in the periodic table that signify the number of electron shells in an element.

Explanation:

Answer:Groups: The vertical column of the periodic table that signifies the number of valence electrons in an element. Periods: The horizontal rows in the periodic table that signify the number of electron shells in an element.

Explanation:

The table has seven rows and 18 columns. Each row represents one period; the period number of an element indicates how many of its energy levels house electrons.The columns of the table represent groups, or families, of elements.

Answer:

It's because the solubility of gases in water is inversely proportional to the temperature, so it means when the temperature is increased, the solubility decreases, and the gases tend to get out from the soda

Answer:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products and ATP is energy that is transformed from the process.

Explanation:

Answer:

the 3rd answer

Explanation:

the earth is composed of key element like carbon Oxygen nitrogen phosphorus hydrogen and sulphur CHNOPS but they are other element on earth too even though they are not as essential

Answer:

C. Al

Explanation:

2Al+ 3H2SO4(l)------> Al2(SO4)3+ 3H2

Answer:

9 grams of nitrogen gas

Explanation:

Answer:

Explanation:

Hence,

The above statement is true for, the gas particles moves faster in high temperature.

A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.

We have 2 containers connected by a valve.

One container has a volume of 3.00 L and contains O₂ at 4.00 atm. The other container has a volume of 2.00 L and contains Ne at 2.00 atm.

When the valve is opened, the total volume is the sum of the 2 containers.

[tex]V_2 = 3.00 L + 2.00 L = 5.00 L[/tex]

Assuming constant temperature and ideal behavior, we can calculate the final pressure of each gas using Boyle's law.

O₂

[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{4.00atm \times 3.00L}{5.00L} = 2.40atm[/tex]

Ne

[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{2.00atm \times 2.00L}{5.00L} = 0.800atm[/tex]

The final pressure in the container will be the sum of the final pressures of the gases.

[tex]P = 2.40 atm + 0.800 atm = 3.20 atm[/tex]

A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.

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Answer:

q

=

64 kJ this is answer. .

Answer:

That should be crucible tong

Answer:

Highway 22 ,GA 31820

Explanation:

Answer: Activation energy is defined as the minimum amount of extra energy required by a reacting molecule to get converted into product. It can also be described as the minimum amount of energy needed to activate or energize molecules or atoms so that they can undergo a chemical reaction or transformation.

Explanation:

Answer:

no ofcourse not!

Explanation:

Answer:

no

Explanation:

the universe is way too big, maybe not in a conventional form but there are definitely aliens

Answer:

true

Explanation:

Answer:

[tex] {S}^{16} [/tex]

group 16 period 2 of the periodic table

note: that is not the electronic configuration, that is the Bohr model.

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Sulfur is the correct answer for our given question

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

We can find any element in periodic table if its electronic configuration is given. From electronic configuration, we can find the group number and the period number. So, according to our question the configuration is 2,8,6. Form here we can say that  atomic number of element is 16 and the valence electron is 6 so the only group in the periodic table that has valence electron 6 is the group 16 that is oxygen family.

Therefore Element is sulfur and is found in group 16 and period 2

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Answer:

yes

Explanation:

Answer:

Explanation: ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

superscript Coefficient

Me think

Answer:

See Explanation

Explanation:

Alpha Decay is the emission of helium nuclei (₂He⁴). That is, two protons and two neutrons are emitted. By formula equation ...

₈₂Pb²⁰⁸ => ₈₀Hg²⁰⁴ + ₂He⁴ =>  ₈₀Hg²⁰⁴ + (₂α⁴)⁺²

Note the sum of superscripts & subscripts of reactants (₈₂Pb²⁰⁸) must equal sum of superscripts & subscripts of products (₈₀Hg²⁰⁴ + ₂He⁴); that is ...

∑mass reactants = ∑mass products => 208 = 204 + 4

∑atomic no. reactants = ∑atomic no. products => 82 (Pb) = 80 (Hg) + 2 (α⁺²)

Hope this helps. Doc :-)

The effects of long-term exposure to mustard gas causes mortality and chronic respiratory disease.

Exposure to mustard gas in the long term can result in mortality from influenza, pneumonia as well as chronic breathing disease. Exposure for long term leads to respiratory complications and septic shock. Extensive breathing in the environment of mustard gas can cause chronic respiratory disease, respiratory infections or death.

Extensive eye exposure to this gas can cause permanent blindness. Exposure to mustard gas may also increase the chances of lung and respiratory cancer so we can conclude that mustard gas is lethal and can cause a number of diseases in a person who is exposed to it.

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Answer:

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

Answer:

20 / 33

Explanation:

Have a great day

Brainlyest plz

Answer:

The periodic table is a chart that arranges all of the chemical elements.The chemical elements are the substances that make up all matter. The amount of tiny particles in each element is the atomic number, which is how you identify it.

Explanation:

Answer:

see explanation

Explanation:

How is the relatively high melting point of sodium chloride related to its structure at the atomic scale? Observe sodium chloride crystals with a hand lens. Use your observations and the model of sodium chloride to support your claim.

Unlike the raltively low melting point of water (100 °C), NaCl has a much higher melting point (801 °C),.

Theater molecules in ice are held together by hydrogen bonds, which are relatively weak.

The ions in NaCl are held together by  ionic bonds, whose electrostatic ,force is much greater.

The crystal structure makes the force even greater.

imagine a chloride ionin a NaCl crystal.

It has Na ions in front, behind, to the left, to the right, above and below.

Likewise the Na ion has Cl ions in front, behind, to the left, to the right, above and below.

It takes a lot of energy to berak these bonds and temprature is a measure of energy.

if you try the experiment make certain you are undr a fune hood and wear protective loves and apron.   801 °C can seriously burn skin and clothing

The temperature at which the liquid and the solid of refined compounds and elements can occur stable and in equilibrium is called the melting point.

Therefore, the melting point is related to the structural organization of the atoms.

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Explanation:

Main compounds of milk are lactose and casein. And it is also called a colloidal mixture (i.e. in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance). Therefore milk is regarded as a mixture not as a pure substance. So this is the required answer.

Explanation:

I think

maganese is +7 and Nitrogen is +5

sorry if I am incorrect I haven't done chemistry in a year

btw for chemistry if you need help with equations I used this equation balancer called chemical aid it helps

In Mn3N4, the compound consists of three manganese (Mn) atoms and four nitrogen (N) atoms.

To determine the oxidation numbers, we can assign x as the oxidation number for manganese and y as the oxidation number for nitrogen.

Since the compound is neutral overall, the sum of the oxidation numbers must equal zero.

For the three manganese atoms:

3x = 0

x = 0

For the four nitrogen atoms:

4y = 0

y = 0

Therefore, the oxidation numbers for manganese (Mn) and nitrogen (N) in Mn3N4 are both 0.

Answer:

the organisms themselves,other organisms,interactions between living organisms, and even their waste.

Answer:

Volume x Density = Mass of a substance

1300 x 0.67 = 871

The mass is 871 (unit)

Explanation:

When dilute HCl is added to a small amount of copper oxide in a beaker, a greenish-yellow gas is released and a bluish-green solution is formed. Since the metal oxides such as a Copper oxide (CuO) are basic in nature, it reacts with acids such as HCl to form the corresponding salt and water.