what happens when: sulphuric acid reacts with zinc.​

Answer:

Blue is the metal Metals react by losing electrons from the outermost shell, which means their outermost electrons and now closer to the nucleus (one shell lower) and thus they get smaller when you go from metal atom to metal ion.

Explanation:

At sunset the light from the sun grazes across the surface of the earth, passing through a long column or pathlength of atmosphere. During its passage through the atmosphere the blue components of the light are reduced in intensity, making the transmitted beam of sunlight more yellow or even red in color.

hope this helps ^^

Answer:

Here ya go ;)

Small particles of dust and pollution in the air can contribute to (and sometimes even enhance) these colors, but the primary cause of a blue sky and orange/red sunsets or sunrises is scattering by the gas molecules that make up our atmosphere. ... In this way, clouds act as a screen on which nature's colors are painted.

Answer:

C - apparent magnitude

Explanation:

Answer:

gallium and germanium

Explanation:

hope it will help you

The element that would form +4 ions is Germanium. The correct option is b Germanium

From the question,

We are to determine which of the given elements will form +4 ions.

Gallium belongs to group 13 and will form +3 ions because the its oxidation state is +3.

Germanium belongs to group 14 and it forms stable oxidation state of +2 and +4. Therefore, Germanium will form +4 ions.

Calcium belongs to group 2 on the periodic table. Its oxidation state is +2 and it forms +2 ions.

Magnesium also belongs to group 2 on the periodic table. Its oxidation state is +2 and it forms +2 ions.

Hence, the element that would form +4 ions is Germanium. The correct option is b Germanium

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Answer:

When a conversion is necessary, the appropriate conversion factor to an equal value must be used. For example, to convert inches to feet, the appropriate conversion value is 12 inches equal 1 foot. To convert minutes to hours, the appropriate conversion value is 60 minutes equal 1 hour

Explanation:

hope this helps have a good night/day :) ❤

Answer:

The person who just wanted points is annoying

Explanation:

WHY WOULD YOU DO THAT

Answer:

A

Explanation:

Answer:

NaHCO3

Explanation:

Answer:

NaHCO₃

(You can use regular searches to find formulas by the way, much faster)

(({Multiple choice for my review but NOT THE ANSWER FOR THIS QUESTION:

provides a type of adaptive immunity

injects a weakened or inactive form of a virus into the body

must be given on a regular basis from birth to 18 years of age.                

People with my review please note that it doesn't have to be given on a regular basis. I grew up just fine without one every so often.}))

Answer:

0.087 moles of water

Explanation:

Given data:

Number of molecules of water = 5.24×10²² molecules

Number of moles of water = ?

Solution:

The given problem will solve by using Avogadro number.

1 mole = 6.022 × 10²³ molecules of water

5.24×10²² molecules × 1 mol / 6.022 × 10²³ molecules

0.87×10⁻¹ mol

0.087 mol

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

Answer

Boils at -223 degree C

Explanation:

Because gas doesn't have any boiling points

Answer:

Hydrogen has three naturally occurring isotopes: 1H (protium), 2H (deuterium), and 3H (tritium). Other highly unstable nuclei (4H to 7H) have been synthesized in the laboratory, but do not occur in nature. The most stable radioisotope of hydrogen is tritium, with a half-life of 12.32 years.

Explanation:

i really hope i helped ya out! good luck!

Single replacement/displacement

Given

Type involves free element

Required

Type of reaction

Solution

Single replacement/displacement occurs when a more active element replaces another less active element in the compound to form a new compound

The activity of this element can be seen from the voltaic series

Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au  

The more to the left, the element is more reactive (easily release electrons) and the stronger reducing agent  

The general formula for single replacement :

A + BC ⇒ AC + B

From this general formula shows that there are 2 free elements on both sides (reactants and products)

The Meaning :-

1. Rearing Is The Process Of Keeping, Feeding, Breeding, And Medical Care Of Useful Animals.

2. Shearing Is The Process Of Removing The Fleece Of Sheep, Along With A Layer Of Skin By A Large Razor, Clipper Or A Shearing Machine.

3. Sericulture Is The Rearing Of Silkworms On A Commercial Scale.

We know, molecular mass of sucrose is 342 g/mol.

So, number of moles in 18 g is :

[tex]n_1 = \dfrac{342\ g/mol}{18\ g}\\\\n_1 = 0.053 \ moles[/tex]

Also, number of moles of water is :

[tex]n_2 = \dfrac{180}{18} \\\\n_2 = 10 \ moles[/tex]

We know, 1 mole of sucrose contain 11 moles of oxygen.

So,

[tex]n' = 0.053\times 11\\\\n'= 0.583\ moles[/tex]

1 mole of water contain 1 mole of oxygen .

So, moles of oxygen in water are :

[tex]n'' = 10\ moles[/tex]

Total number of moles, [tex]n' + n'' = 10.583 \ moles[/tex] .

Number of oxygen atoms are :

[tex]N = 6.022 \times 10^{23}\times 10.583\\\\N = 6.37 \times 10^{24}[/tex]

Hence, this is the required solution.

Answer:

the answer would be 11 grams of water/sugar water

Explanation: its that because 11 grams plus 1 gram = 11 grams

even though it may seem it may just go away that mass has to go somewhere it just doesn't vanish from the earth.

Answer:

Half-life = 28.8 years

Explanation:

The radioactive decay of an atom follows the equation:

Ln[A] = -kt + ln[A]₀

Where [A] is actual amount of isotope after time t; k is decay constant and [A]₀ initial amount of isotope

Solving for k:

Ln[0.393g] = -k*10yrs + ln[0.500]

-0.2408 = -k*10yrs

0.02408yrs⁻¹ = k

Half-life, is:

Half-life = ln 2 / k

Half-life = ln 2 / 0.02408yrs⁻¹

Half-life = 28.8 years

The isotope [tex]38Sr^{90}[/tex] is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

Formula:

radioactive decay follows first-order kinetics,  

k = [tex]\frac{1}{t}ln\frac{a}{x}[/tex]

Given:  

a = initial amount = 0.5 g  

x = amount of isomer after 10 years = 0.393 g  

t= time   = 10 years

Solution:  

k =  [tex]\frac{1}{10}ln\frac{0.5}{0.393}[/tex]

   = 0.02408  

k = [tex]\frac{0.693}{t/2}[/tex]  

T(1/2) = half-life time

= [tex]\frac{0.693}{k}[/tex]

=   [tex]\frac{0.693}{0.02408}[/tex]

= 28.78 years.

Thus, The isotope [tex]38Sr^{90}[/tex] is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

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Answer:

The balanced chemical reaction is written as follows:

bacl2 + na2so4 → baso4 + 2nacl

Therefore, the number of chlorine atoms in the reactants side and the products side would be 2 atoms in both sides which should be the case because the number of atoms in each side should have the same number.

Explanation:

Internet

Answer:

Hope it helps!

Explanation:

Air molecules are too far to disperse heat energy to one another efficiently. Heat is conducted by molecules and atoms that are very closely bonded together and vibrating at high frequency.

Answer:

2.74 x 1023 molecules of CO2.

Explanation:

There are 2.74 x 1023 molecules of CO2.

Answer:

Tbh I looked it up but here is what I found. I hope it helps

Explanation:

In chemistry, the inductive effect is an effect regarding the transmission of unequal sharing of the bonding electron through a chain of atoms in a molecule, leading to a permanent dipole in a bond.

Answer:

B and C look blue therefore they are hot but A and C look big

The appearance of the three stars is compared by their colors and sizes.

In the image you can see the stars of the constellation Orion.

According to the above, it can be inferred that the three stars differ in their colors and sizes. Their colors can be determined by the chemical composition of them, while their sizes by the distance that separates them from the Earth, making the farthest ones look smaller and the closest ones, bigger.

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Answer:

Group 7A

Explanation:

The group 7A elements consists of the most reactive non-metals on the periodic table.

This group is known as the group of halogens. They consist of element fluorine, chlorine, bromine, iodine and astatine.

Answer:

the molecules are tightly bound together, making it easy for electric currents to jump from one molecule to the next.

Explanation:

Answer:

They are good conductors of thermal energy because their delocalised electrons transfer energy.  The close packing of the metal ions in the lattice. the delocalised electrons can carry kinetic energy through the lattice.

Explanation:

Answer:

yes

Explanation: