elements have similar characteristics?
Periodic TaBle
oF The Elements

Answer:

3Rb3P → 9Rb + P3

Hope it helps!!!

The balanced form of the expression is given as:

[tex]3Rb_3P \rightarrow 9Rb + P3[/tex]

From the given question, we are to balance the equation of Rb and P^3+

[tex]Rb_3P \rightarrow Rb + P3[/tex]

Since the number of moles at the reactant must be equal to that of the product.

The balanced form of the expression is given as:

[tex]3Rb_3P \rightarrow 9Rb + P3[/tex]

Learn more on balancing of equation here: https://brainly.com/question/26227625

Answer:

Explained below

Explanation:

Group 3A elements are made up of the metalloid - boron (B) and other metals such as Aluminum (Al), gallium (Ga), indium (In), & thallium (Tl).

Now, as we go down the group, the size of the central atom will increase thereby causing the lone pair to become delocalized over a larger volume space. Thus, it's not readily available for donation and thus basicity increases

Explanation:

Cooking utensils, such as pots, pans and menu trays, are often made from aluminium because it is lightweight and conducts heat well, making it energy-efficient for heating and cooling. These properties also make it a preferred material for packaging.

Answer:

Yes, they work in space. I forgot an example, will edit the post when I found it

Hope this helps!

Answer:

The answer to your question is given below.

Explanation:

We'll begin by converting 100 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

100 mL = 100 mL × 1 L / 1000 mL

100 mL = 0.1 L

Next, we shall determine the number of mole of NaCl in the solution. This can be obtained as follow:

Volume of solution = 0.1 L

Molarity of NaCl = 0.250 M

Mole of NaCl =?

Molarity = mole / Volume

0.250 = mole of NaCl / 0.1

Cross multiply

Mole of NaCl = 0.250 × 0.1

Mole of NaCl = 0.025 mole

Finally, we shall determine the mass of 0.025 mole of NaCl. This can be obtained as follow:

Mole of NaCl = 0.025 mole

Molar mass of NaCl = 23 + 35.5

= 58.5 g/mol

Mass of NaCl =?

Mole = mass / Molar mass

0.025 = mass of NaCl /58.5

Cross multiply

Mass of NaCl = 0.025 × 58.5

Mass of NaCl = 1.46 g

Thus, to prepare the solution, weigh out 1.46 g of NaCl and dissolve in 1 L of water.

Answer:

[tex]\huge\boxed{sp \ hybridization}[/tex]

Explanation:

In HCN,

Carbon is singly - bonded ( 1 sigma bond ) to Hydrogen while triply - bonded ( 1 sigma, 2 pi bonds) to Nitrogen.

Thus, the Stearic No. for Carbons is:

= No. of sigma bonds + No. of lone pairs

= 2 + 0

= 2

According to Stearic No.:

=> sp = 2

=> sp² = 3

=> sp³ = 4

Hence,

The hybridization of C in HCN is sp.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

they are not liquids at room temperature, so your answer is the last one

Explanation:

Answer:

6.3moles

Explanation:

The balanced chemical equation for the decomposition of phosphorus oxychloride (POCl3) is as follows:

POCl3 → POCl + Cl2

Based on the above decomposition reaction, it shows that;

1 mol of POCl3 will decompose to give 1 mole of Cl2

Hence, 6.3 moles of POCI3 will give 6.3 moles of Cl2.

Answer:

B. Solid

Explanation:

As the problem states, the stronger the cohesive forces of a substance, the more ordered that substance is.

Asking which state has the strongest cohesive forces is the same as asking which state is the most organized.

Solids are more organized than liquids (as solids have a definite shape and volume). Liquids are more organized than gases (as liquids have a definite volume).

Answer:

uhhh not really i don't even know what that is LOL

Answer:

ANSWER is E

Explanation:

2H₃PO₄ + 3Ca(OH)₂→ 6H₂O + Ca₃(PO₄)₂

Answer:

First step is to find what the products would be. Since this seems to be a double displacement, you get: H3PO4(aq)+Ca(OH)2(aq)→ H2O(L)+Ca3(PO4)2(s)

You know the products because H has a charge of +1, so PO4 must have a charge of -3, and since OH has a charge of -1, Ca must be +2. Then make each compound have a net charge of 0. H20 is a liquid since aq solutions have liquid water. Ca3(PO4)2 is a solid, use the solubility rules.

Lastly, balance the equation: 2H3PO4(aq)+3Ca(OH)2(aq)→ 6H2O(L)+Ca3(PO4)2(s)

So the salt formed is Ca3(PO4)2

Explanation:

it changes colour it gives blue black colour

Answer:

See explanation

Explanation:

According to the question Copper is obtained from  the original alloy and the copper wire used to displace the silver.  

So,

Mass of the copper from the original alloy: (10.00 % * 1.250 g) =  0.125 g

We now need to obtain the mass of the copper from the wire, then we consider how much silver is precipitated:

Mass of silver in the alloy; 90.00 % * 1.250 g = 1.125 g

So,

Amount of silver precipitated =

1.125 / 107.9 = 0.01043 mole

From the reaction equation, it takes two moles of silver to displace one mole of copper.

Hence, the amount of copper from the wire is:  0.01043 / 2 = 0.005213 mol

And a mass of  0.005213(63.55) = 0.3313 g

Total mass of copper=  0.125 + 0.3313 = 0.456 g

Answer:

0.5mol

Explanation:

Please mark as brainliest

Answer:

Earth rotates from west to east

Explanation:

hope it helps

Answer:

C.

Explanation:

Chemical structure

Answer:

urban and private sector

Explanation:

Answer:

For example: water is liquid, ice is solid, and water vapor is gas

Explanation:

Answer: The mass of aluminium sample is 55.4 gram

Explanation:

[tex]Q_{absorbed}=Q_{released}[/tex]

As we know that,  

[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]

[tex]m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)][/tex]      

where,

[tex]m_1[/tex] = mass of aluminium = ?

[tex]m_2[/tex] = mass of water = 300.0 g

[tex]T_{final}[/tex] = final temperature = [tex]23.8^0C[/tex]

[tex]T_1[/tex] = temperature of aluminium = [tex]94.5^oC[/tex]

[tex]T_2[/tex] = temperature of water = [tex]21.0^oC[/tex]

[tex]c_1[/tex] = specific heat of aluminium = [tex]0.897J/g^0C[/tex]

[tex]c_2[/tex] = specific heat of water =  [tex]4.184J/g^0C[/tex]

Now put all the given values in equation (1), we get

[tex]-[m_1\times c_1\times (T_{final}-T_1)]=[m_2\times c_2\times (T_{final}-T_2)][/tex]

[tex]-[m_1\times 0.897\times (23.8-94.5)^0C]=[300.0g\times 4.184\times (23.8-21.0)][/tex]

[tex]m_1=55.4g[/tex]

Therefore, the mass of aluminium sample is 55.4 gram

Answer:

D. Potential

Explanation:

Answer:

Potential

Explanation:

Gravitational potential is the energy the object has of it's position of the earth's surface. When the object is lifted, work is done.  When work is done in raising the height of an object, energy is transferred as a gain in the gravitational potential energy of the object.

Answer:

6.22 × 10⁻⁵

Explanation:

Step 1: Write the dissociation reaction

HC₆H₅COO ⇄ C₆H₅COO⁻ + H⁺

Step 2: Calculate the concentration of H⁺

The pH of the solution is 2.78.

pH = -log [H⁺]

[H⁺] = antilog -pH = antilog -2.78 = 1.66 × 10⁻³ M

Step 3: Calculate the molar concentration of the benzoic acid

We will use the following expression.

Ca = mass HC₆H₅COO/molar mass HC₆H₅COO × liters of solution

Ca = 0.541 g/(122.12 g/mol) × 0.100 L = 0.0443 M

Step 4: Calculate the acid dissociation constant (Ka) for benzoic acid

We will use the following expression.

Ka = [H⁺]²/Ca

Ka = (1.66 × 10⁻³)²/0.0443 = 6.22 × 10⁻⁵

Answer:

Answer is explained in the explanation section below.

Explanation:

Penetration refers to the proximity of electrons in an orbital to the nucleus.

Deeper-penetrating electrons have less shielding and therefore a higher Effective nuclear charge (Zeff), but they better shield other electrons.

To illustrate penetration, we may use the idea of Zeff, or effective nuclear charge. It's actually the difference between the number of charged protons and the number of shielded electrons. To put it another way, how effective the nucleus is at attracting electrons. Since they do not shield themselves, the core electrons penetrate the most and are exposed to the most strong nuclear charge.

The electron probability density is highest in the orbital's centre or nucleus for 28-orbitals.

In a multi-electron unit, the electron density near the nucleus of an atom for each shell and subshell of an electron is used to measure the nucleus penetration by an electron.

Since it has a higher electron density near the nucleus, the 2s electron penetrates the nucleus of the atom more than the 2p electron.

A 2s electron is less well shielded by the core electrons than a 2p electron because it can spend more time near the nucleus as a result of the penetration.

Mathematical Expression:

v = [tex]\frac{-Zeff * e^{z} }{r^{2} }[/tex]

oxygen  is needed as a reactant for cellular respiration

Cellular respiration can be defined as the process  which occurs in every cells mainly mitochondria of plants and animals, it involve in the break down of sugars in the presence of oxygen and releases energy in the form of ATP.

The waste product of this process are carbon dioxide and water during exhalation process done  by lungs,  breathing and cellular respiration are related to each other.

At every step of cellular respiration energy is used in the form of ATP and carry out the normal function. It can aerobic and anaerobic respiration on the basis of use of oxygen.

For more details regarding cellular respiration, visit

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Answer: A. True

Explanation:

Answer:

Stay in shade

Explanation:

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Answer:

c answer and d is correct answers

Explanation:

i hope helpful to us