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Ksenya-84 [330]
3 years ago
14

Mount Rushmore national memory in South Dakota was carved out of grantie that formed from cooled magma what type of rock matches

this description ​
Chemistry
1 answer:
gulaghasi [49]3 years ago
7 0

Answer:

igneous rocks

Explanation:

igneous rocks forms from lava, such as obsidian, basalt, plumice, etc

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How many moles of oxygen are required to react with methanol in order to produce 13 moles of formaldehyde?
ddd [48]

Answer:

6.5 moles of Oxygen are required

Explanation:

Based on the reaction:

CH3OH + 1/2 O2 → CH2O + H2O

1 mole of methanol reacts with 1/2 moles O2 to produce 1 mole of formaldehyde and 1 mole of water.

Thus, to produe 13 moles of formaldehyde, CH2O, are needed:

13 moles CH2O * (1/2mol O2 / 1mol CH2O) =

<h3>6.5 moles of Oxygen are required</h3>
3 0
3 years ago
You want to mix 1 molar Nitric acid with water to dilute the nitric acid to .5 molar how should you mix these two liquids togeth
navik [9.2K]

Answer:

Freeze the water

Explanation:

5 0
3 years ago
What is an ionic bond?
quester [9]

Answer:

D = A bond resulting from the transfer of one or more electrons.

Explanation:

Ionic bond:

It is the bond which is formed by the transfer of electron from one atom to the atom of another element.  

Explanation:

Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.

For example:

Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion.  

while by sharing of electrons covalent bond is formed.

Covalent bond:

It is formed by the sharing of electron pair between bonded atoms.  

The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.

For example:

In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial negative.

7 0
3 years ago
In contrast to the _____________ that lead to ionic bonds, covalent bonds form when ___________
Nadusha1986 [10]
Is it multiple choice? If not your answers are metals, and when nonmetals react.
3 0
3 years ago
A mercury barometer is an instrument in which the weight of a column of mercury in a glass tube with a sealed top is balanced ag
Arte-miy333 [17]

Answer:

h = 0.346 m

Explanation:

mercury barometer:

  • Pa = ρgh

∴ Pa = 0.455 atm = 46102.875 Pa = 46102.875 Kg/ms²

∴ ρ = 13600 Kg/m³

∴ g = 9.80 m/s²

⇒ h = (46102.875 Kg/ms²) / (13600 Kg/m³ )(9.80 m/s²)

⇒ h = 0.346 m

7 0
4 years ago
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