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B
A
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What is represented by letter B?

Cloud is a gas.

ice is a solid.

snow is a solid.

steam is a gas.

rain is a liquid.

Answer:

Explanation:

A compound that can act both as an acid and a base is called an amphoteric substance. A good example (based on the question) of an amphoteric substance is the Aluminium hydroxide [Al(OH)₃] where Aluminium is the "M" in M-O-H. Aluminium is in the third period of the periodic table. The reaction below shows aluminium can act both as an acid and as a base in different neutralization reactions.

As an acid

Al(OH)₃ + 3NaOH ⇒ Na₃AlO₃ + 3H₂O

As a base

3HCl + Al(OH)₃ ⇒ AlCl₃ + 3H₂O

NOTE: A neutralization reaction is a reaction between an acid and a base to give you salt and water

Answer:

Radiation

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible.

Answer:

50 km/hr

Explanation:

just divide the distance by the time (350/7)

Answer:

50 km/hr

Explanation:

Distance = 350 km

Time = 7 hours

Average Speed = ?

[tex]Average\:Speed = \frac{Distance}{Time} \\\\Average\: speed = \frac{350\:km}{7\:hr} \\\\A.V = 50\:km/hr[/tex]

Answer:

Inertia.

Explanation:

The resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

We have that for the Question "How can the motion of an object that is NOT moving change?" it can be said that Force is the reason for motion and is how can the motion of an object that is NOT moving change

From the question we are told

How can the motion of an object that is NOT moving change?

Generally

Motion defines as the movement of a body from one place to another

Therefore

What the question is asking is

What makes the movement occur

Force

Force is defines as Mass of of an object times its acceleration but aslo is

the work done in a given time frame

Therefore

Force is the reason for motion and is how can the motion of an object that is NOT moving change

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Answer:

Na

Sodium is located in the third row of the periodic table, where the 3s3s3, s orbital is being filled. Because sodium is the first of the two 3s3s3, s elements, its ground-state electron configuration contains a single, unpaired 3s3s3, s electron.

Explanation:

its late but ik someone can use it

The ground-state electron configuration for an element contains an unpaired 3s electron is Sodium, Na.

The ground state electron configuration of an element shows a series of how its electrons are arranged in thier orbitals at their  lowest energy state.

The element which contained an unpaired 3s electron is the Alkali metal, Sodium.

Sodium, Na has atomic number of 11 and at ground state and will therefore be written as  1s²2s²2p⁶3s¹   We can also write the condensed form since the core electrons is the same with Ne,  a noble gas which is [Ne]3s1.

The s orbital should contain at most 2 electrons , since for sodium, it has 1 electron in the 3s orbital, we say it is unpaired.

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Answer:

The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %

Explanation:

The mass percentage of a solution is a measure of concentration that indicates the number of grams of solute that there are per 100 grams of solution.

The percent by mass is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100 to give a percentage.

[tex]percentage by mass=\frac{solute mass}{solution mass} *100[/tex]

In this case:

Replacing in the definition of percent by mass:

[tex]percentage by mass=\frac{30 g}{650 g} *100[/tex]

Solving:

percent by mass= 4.61 %

The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %

Answer:

Asia

Explanation:

Answer:

Asia.

Explanation:

Answer:

kilo gram

Explanation:

kilogram(kg)

Answer:

Kilogram (Kg).......

option c is correct

number of electron in the outermost shell describe the reactivity if the outermost shell is completely filled its mean the reactivity of element is low and if it is completely filled then the element is highly reactive

Answer:

3.6

Explanation:

3.6 is only 0.1 away from 3.5

I hope this helped and plz give brainliest!

Answer:

The Bohr model shows the atom as a central nucleus containing protons and neutrons with the electrons in circular orbitals at specific distances from the nucleus (Figure 1). These orbits form electron shells or energy levels, which are a way of visualizing the number of electrons in the various shells

Answer:

because acids come from various chemical substances

Answer:

The correct option is;

Bromine will gain 1 valence electron to become a negative ion

Explanation:

Bromine can be found in period 4 in group 17 of the periodic table and is an halogen

The electron configuration of bromine can be presented as follows;

Electronic configuration 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁵

Therefore, an atom of bromine has 2 + 5 or 7 electrons in its outermost shell, which makes it have one less electron to complete a full octet structure and therefore, bromine has a strong affinity for electron to complete its octet structure and it is thus a strong oxidizing agent.

When bromine enters into a chemical reaction and gains the one valence electron it becomes a negatively charged ion.

Answer:

there are more than 109 different types of atom - one for each element.

Answer:

The CORRECT answer is Solution

Explanation:

Since a Colloid is a liquid like substance that cannot be removed from other solids the only possible choice would be a Solution. becuase with a solution you can drain the solution and still get the beans.

Answer:

Aluminium.

Explanation:

The above electronic configuration can be written in a simplified form as shown below:

1s² 2s²2p⁶ 3s²3p¹

Next, we shall determine the number of electrons in the atom of the element as follow:

Number electron = 2 + 2 + 6 + 2 + 1

Number of electron = 13

Next, we shall determine the number of protons.

Since the element is in its neutral state,

The number of electrons and protons are equal i.e

Proton = Electron

Number of electron = 13

Proton = Electron = 13

Proton = 13

Next, we shall determine the atomic number of the element.

The atomic number of an element is simply the number of protons in the atom of the element i.e

Atomic number = proton number

Proton = 13

Atomic number = 13

Comparing the atomic number of the element with those in the periodic table, the element with the above electronic configuration is aluminium since no two elements have the same atomic number.

Review your instructions

Answer:

41.17

Explanation:

n Zn =  mass / m.wt

      = 8.75 /(65.4) = 0.1338 mole

n HCL = ( from the balanced equation )

     2HCL                  Zn

          2mole   → 1  mole

          x  mole     →             0.1338mole

     n HCL = .268 mole

M= mole/liter

6.50= 0.268/x

so u have0.04117  liter = 41.17 ml

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 41.17 ml of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s).

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of moles of zinc=  mass / molecular mass

                                       = 8.75 /(65.4) = 0.1338 mole

number of moles of HCl ( from the balanced equation )

2 moles of HCl reacts with one mole of Zn

number of moles of HCl = 2×0.1338 =0.268 mole

Molarity = number of mole of HCl/volume occupied by solution

6.50= 0.268/volume

Volume of HCl = 41.17 ml

Therefore, 41.17 ml of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s).

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Answer:

B,D,E

Explanation:

Answer:

d = 16.96 g/mL

Explanation:

Given that,

Initial water level in graduated cylinder is 47 mL and final water level is 48.35 mL.

The weight of the neclace is 22.89 g.\

We need to find the volume of the necklace. We know that, density equals mass per unit volume. So,

[tex]d=\dfrac{m}{V_f-V_i}\\\\d=\dfrac{22.89\ g}{(48.35-47)\ mL}\\\\d=16.96\ g/mL[/tex]'

Hence, the density of Terry’s necklace is 16.96 g/mL.

Answer:

A

Explanation:

The new mine means the supply is high and the price is low, so she can afford the necklace

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 62 mL

density = 1.02 g/mL

The mass is

mass = 1.02 × 62

We have the final answer as

Hope this helps you

Answer:

water

for one molecule of water each atom has the atomic mass unit, u,shown.

Explanation:

*can i be the brainliest*

Answer:

f=vλ where: f is the frequency of the wave in hertz. v is the velocity of the wave in meters per second. λ is the wavelength of the wave in meters

f= 32*8 = 256 hertz

Explanation:

Answer:

The charge of an element is equal to the number of protons minus the number of electrons. The number of protons is equal to the atomic number of the element given in the periodic table. The number of electrons is equal to the atomic number minus the charge of the atom.

Explanation:

Answer:

titanium and potassium

Explanation:

Answer: geranium and krypton

Explanation: hope this helps

Answer:

Explanation:

When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons. In the opposite case when an atom gains electron(s) it becomes negatively charged (more electrons than protons)

and plzs do not hate

The charge of chromium after losing 4 electrons is +2.

Ions are two or more charged particles that make up ionic compounds. Electrostatic attraction keeps the ions together (in the solid phase) despite their opposing charges. Cations are positively charged ions, whereas anions are negatively charged ions. Many factors make ionic molecules significant.

They act as electrolytes for batteries and conduct electricity when dissolved in water. They could form a strong bond with other charged particles, such as those found in environmental samples or the human body. They find use in fireworks, flares, and lights because they are frequently multicolored when burned. The list is endless!

Studying the nomenclature used to give ionic compounds distinctive names is a good method to become familiar with and exposed to them. You will learn how to properly explain the identification of substances in language by converting from a chemical formula to a name—a highly essential problem as the diversity and complexity of known compounds keeps growing!

Therefore, the charge on chromium after losing 4 electrons is +2.

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