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4 years ago

Name two ways the archaea differ from bacteria

1 answer:

4 0

Apart from their habits , bacteria and archea differ in cell wall structure and membrane lipid composition . A ll bacteria have peptidoglycans in the cells wall where as the archea do not . both also are different in the RNA polymerases and thus in their protein synthesis .I hope that can help you !!:))

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How crust is made of ? and How rocks and minerals are related ?

Alexeev081 [22]

Many crystals of calcite are cemented together to form the limestone. Granite is a rock that is comprised of several different minerals, including quartz, biotite, potassium feldspar, and plagioclase feldspar.

6 0

3 years ago

A student was holding a metal rod to a candle flame. After a while he noticed that his hand was getting hot.

ArbitrLikvidat [17]

Answer:

Conduction

Explanation:

Conduction is when energy directly travels through a solid to get from one point to another.

4 0

3 years ago

When calcium hydroxide powder is placed into a hydrochloric acid solution, aqueous calcium chloride and water are formed?

Vanyuwa [196]

Answer: yes, when calcium hydroxide powder is placed into a hydrochloric acid solution, aqueous calcium hydroxide and water are formed.


Explanation:

1) Calcium hydroxide is a base whose chemical formula is: Ca(OH)₂

2) Hydrochloric acid is the acid with chemical formula HCl

3) Acids and bases react in a double replacement reaction forming salt plus water: Acid + Base → salt + water


4) The specific chemical equation for these reactants is:

Ca(OH)₂ (s) + 2HCl(aq) → CaCl₂ (aq) + 2H₂O(l)

5) CaCl₂ is calcium chloride, a salt, and H₂O is water

5 0

3 years ago

Read 2 more answers

The regulation of mineral ions in the cellular fluids of biological systems is performed by ion pumps that selectively transport

siniylev [52]

Answer:

The smallest ion is : Mg 2+

Increasing Order of size :

Mg2+ < Na+ < F- < O2-

Explanation:

Isoelectronic Species : Species having same number of electrons .

$Z_{eff}$ = Effective attraction of the nucleus felt by the outer shell electrons.

The size of the atom is decided by :

Its atomic number (number of proton)

the effective nuclear charge.

As the positive charge increases the size of the ion decreases.

As the negative charge increases the size of ion also increases.

Negative charged ions : F- , O2-

Negative charge are formed when electrons are added to the atoms.

When Negative ion is formed :

Number of proton remain same

Number of electron get increased

Hence it becomes difficult for the proton in the nucleus to attract the electrons.

Electron - electron Repulsion increases

$Z_{eff}$ = decreases

Size increase

Positive charged ions : Na+ , Mg2+

Positive charge are formed when electrons are removed from the atoms.

When Positive ion is formed :

Number of proton remain same

Number of electron get reduced

Hence more attraction of the nucleus is felt by the outer electron.

Electron - electron Repulsion Decreased

$Z_{eff}$ = increases

Size decreases

8 0

4 years ago

Calculate the mass of water produced when 7.26 g of butane reacts with excess oxygen

MaRussiya [10]

Answer:

11.3 g.

Explanation:

Hello there!

In this case, since the combustion of butane is:

$C_4H_{10}+\frac{13}{2} O_2\rightarrow 4CO_2+5H_2O$

Thus, since there is a 1:5 mole ratio between butane and water, we obtain the following mass of water:

$m_{H_2O}=7.26gC_4H_{10}*\frac{1molC_4H_{10}}{58.14gC_4H_{10}}*\frac{5molH_2O}{1molC_4H_{10}} *\frac{18.02gH_2O}{1molH_2O}$

Therefore, the resulting mass of water is:

$m_{H_2O}=11.3gH_2O$

Best regards!

4 0

3 years ago