Drag the tiles to the correct boxes to complete the pairs.
Match each mineral with its main function in the body.

Answer:

CaCl2

Explanation:

Solution :

From the balanced chemical equation, we can say that 1 moles of KBr will produce 1 moles of KCl .

Moles of KBr in 102 g of potassium bromide.

n = 102/119.002

n = 0.86 mole.

So, number of miles of KCl produced are also 0.86 mole.

Mass of KCl produced :

[tex]m = 0.86 \times Molar \ mass \ of \ KCl\\\\m = 0.86 \times 74.5 \ gram \\\\m = 64.07\ gram[/tex]

Hence, this is the required solution.

Answer:

1. sweep it instead

2.use a wateringcan with a percise nossole to water your plants efectivly 3.keep a jug of water in your frisge

Explanation:

C is the correct answer

Temperature increases as you gain altitude in the stratosphere and the thermosphere. Temperature increases in altitude within the stratosphere because of the ozone layer.

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Please remember to revise this and make it in your own words if you want! I hope this helps you. -Doodle

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Answer:

Increased atmospheric carbon dioxide will cause increased ocean surface temperatures.

Explanation:

Greenhouse gases of which CO2 is a typical example are known to cause a gradual and steady increase in the surface temperature of the earth by trapping infrared rays close to the surface of the earth.

As the surface temperature of the earth rises, the surface temperature of the oceans rises also leading to the tendency towards hurricanes.

Hurricanes are violent storms which are known to form near the equator over warm ocean waters.

Hence, increased atmospheric carbon dioxide will cause increased ocean surface temperature which in turn increases the chances of the occurrence of hurricanes.

One of the most commonly known catalysed reaction is that of Hydrogen Peroxide turning into Water

In this reaction, we can use Potassium Permanganate (KMnO₄) or Palladium (Pd) as a catalyst.

These catalysts helps Hydrogen Peroxide turn into water and oxygen

Catalyst: Substances that change the rate of a chemical reaction and themselves remain chemically unchanged after the reaction are called catalysts.

Example:- In the process of manufacturing of ammonia Fe is used as Catalyst.

[tex]N _{2} (g)+ 3H _{2} (g) \huge \rightarrow {}^{Fe}\rightarrow \small{3NH _{3}(g)}[/tex]

Note:- there is only one arrow. I was unable to put iron over the arrow ..

Answer:

I think it will be the answer

2.5 x 10-2 mol

I hope it help you

Answer:

In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.

Explanation:

In the given question, [tex]7.949 \times 10^{24}[/tex] atoms are present in 13.2 mole of copper.

A mole is defined as the amount of a substance that contains exactly [tex]6.022\times 10^{23}[/tex] 'elementary entities' of the given substance.

The number of atoms in 13.2 moles of copper (Cu) can be calculated using Avogadro's number.

To calculate the number of atoms in 13.2 moles of copper, we can multiply the number of moles by Avogadro's number:

Number of atoms = [tex]\rm 13.2\ moles\ \times[/tex] [tex]6.022\times 10^{23}[/tex] atoms/mole

Number of atoms = [tex]7.949 \times 10^{24}[/tex] atoms

Therefore, in 13.2 moles of copper, there are approximately [tex]7.949 \times 10^{24}[/tex] atoms.

Learn more about Mole here:

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Answer:

The chemical elements most likely to form covalent bonds are those that share electrons, such as carbon, as opposed to those that take them from another element to form an ionic bond. In general, they are nonmetals with similar electronegativities.

Explanation:

Answer:a

Explanation:

Answer:

Atoms and molecules can be deflected by magnetic fields - provided the atom or molecule is first turned into an ion. Electrically charged particles are affected by a magnetic field although electrically neutral ones aren't. The atom or molecule is ionised by knocking one or more electrons off to give a positive ion.

Explanation:

Please Mark me brainliest

The atom must first be ionized.

The mass spectrometer is an important analytical tool in chemistry. It is used to identify atoms and molecules.

However, the atom or molecule to be analysed must first be converted into an ion.

This happens when the instrument imparts an electrical charge to the molecule or atom  then the electrically charged ions are read as electrical current.  The ion is accelerated towards a detector which analyses the deflected ions.

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Answer: Outward

Explanation: :The direction of electric field is radially outward for a positive charge and radially inward for a negative charge. Thus, for the electric field points toward south at a position directly south of a positive charge.

Answer:

Number of neutrons

Explanation:

The mass number represents the number of protons and neutrons combined and the atomic number only represents the number of protons.

mass number - atomic number = number of neutrons

Answer:

mass number - atomic number = number of neutrons

Explanation:

The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. The mass number minus the atomic number represent the number of neutrons.

Answer:

I dont know

Explanation:

I need it to

Answer:

Zinc

Zinc blende

(ZnS)

-----------------

Lead

Galena

(PbS)

-----------------

Mercury

Cinnabar

(HgS)

----------------

Copper

Copper glance

(Cu2S)

-------------------

Explanation:

Had to learn this for a test

Also, I plead the 5th

Answer:

Then it can be easily concluded that 10.86 moles of water will be produced.

Answer:

10.9

Explanation:

trust i js did the assignment

Answer:

predator: crocodile, antelope

prey: ant

corn

It takes 10 years for the substance z to decay from 48g to 3g

Half life of z = 2.5 years

Final amount of Z = 3 g

Initial amount of Z = 48 g

According to the question, it takes 2.5 years for substance Z to reduce to half.

So,

In 2.5 years, the amount of z = 48/2 = 24 grams

In next 2.5 years, the amount of z = 24/2=12g

In next 2.5 years, the amount of z = 12/2=6g

In next 2.5 years, the amount of z = 6/2=3g

To reduce the amount from 48g to 3g, total years = 2.5 + 2.5 + 2.5 + 2.5

= 10 years

Therefore, it takes 10 years for the substance z to decay from 48g to 3g

Explanation:

Lithium

Sodium

group one elements are highly reactive

Answer:

A

Sn2+ + 2Fe3+ > Sn4+ + Fe2+

Answer:

The molar mass and molecular weight of 3CaCl2 is 332.952. 

Answer:

8 gram

Explanation:

in case of NaOH, normality=molarity

so normality=molarity×acidity or basicity(in case of NaOH it's 1)

then

weight of NaOH required = volume in ml × equivalent weight × normality / 1000

so

1000× 40× 0.2/1000

=8 gram

The total mass of sodium hydroxide (NaOH) needed to make the solution is 8 g (Option 4)

Molarity = mole / Volume

0.2 = mole of NaOH / 1

Mole of NaOH = 0.2 mole

Mass = mole × molar mass

Mass of NaOH = 0.2 × 40

Mass of NaOH = 8 g

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Answer:

i. The height of its jump is approximately 0.115 m

ii. The time of flight of its jump is approximately 0.306 seconds

iii. The range of its jump is approximately 0.795 m

Explanation:

The angle at which the grasshopper jumps, θ = 30°

The speed with which the grasshopper takes off, u = 3 m/s

i. The height of its jump 'h', is given by the following relation;

[tex]h = \dfrac{u^2 \times sin^2 \theta}{2 \times g}[/tex]

Where;

g = The acceleration due to gravity ≈ 9.81 m/s²

Therefore;

[tex]h \approx \dfrac{3^2 \times sin^2 (30^{\circ})}{2 \times 9.81} = \dfrac{25}{218} \approx 0.115[/tex]

The height of its jump, h ≈ 0.115 m

ii. The time of flight of its jump, 't', is given as follows;

[tex]The \ time \ of \ flight, \, t = \dfrac{2 \times u \times sin \theta}{ g}[/tex]

Therefore;

[tex]t \approx \dfrac{2 \times 3 \times sin (30 ^ {\circ})}{ 9.81} = \dfrac{100}{327} \approx 0.306[/tex]

The time of flight of its jump, t ≈ 0.306 seconds

iii. The range of the jump is given by the following projectile motion equation for the range as follows;

[tex]R = \dfrac{u^2 \times sin (2 \times \theta)}{ g}[/tex]

Therefore;

[tex]R \approx \dfrac{3^2 \times sin (2 \times 30^ {\circ})}{ 9.81} = \dfrac{41659} {52433} \approx 0.795[/tex]

The range of the jump, R ≈ 0.795 m.

Answer:

During separation of substances with different boiling points, fractional distillation is used.

During separation of substances in an eutectic mixture or azeotropic mixture, steam distillation is used.

Explanation:

from the equation 1 mole of O2 will give 2 moles of H2O then 6.0 moles of O2 will give x

6.0*2 moles/ 1 mole

= 12 moles

this implies that, 6.0 moles of O2 will give = 12 moles of water

Answer:

0.111

Explanation:

Step 1: Calculate the moles corresponding to 23.2 g of ethanol

The molar mass of C₂H₅OH is 46 g/mol.

23.2 g × 1 mol/46 g = 0.504 mol

Step 2: Calculate the moles corresponding to 73.1 g of water

The molar mass of H₂O is 18 g/mol.

73.1 g × 1 mol/18 g = 4.06 mol

Step 3: Calculate the total number of moles

n = nC₂H₅OH + nH₂O = 0.504 mol + 4.06 mol = 4.56 mol

Step 4: Calculate the mole fraction of ethanol

We will use the following expression.

Χ(C₂H₅OH) = nC₂H₅OH / n

Χ(C₂H₅OH) = 0.504 mol / 4.56 mol = 0.111

Answer:

0.015382279644614 mole.

Answer:

yes this is the answer for that quaz