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3 years ago

Whats the three-dimensional shale lf the molecule with this lewis structure? H-Be-H

Chemistry

1 answer:

grin007 [14]3 years ago

7 0

Lewis Structures and the Shapes of Molecules

Formula Shape

14. BF3 trigonal planar

15. NO linear

16. PCl5 trigonal bipyramidal

17. SF6 octahedral

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Sound travel at a velocity of 333 m/s. How long does it take for sound to travel the length of a 100.0 yard football field

Scorpion4ik [409]

Answer:

It takes 0.27 second to travel the distance of 100 yard

Explanation:

We can use the formula ( t = d / s )t = d / s = 91 m / 333 m/s = 0.27 s

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3 years ago

How many atoms and elements are there in C2H5OH

Hatshy [7]

Total atoms is 9 ( 2 carbon atoms, 5 hydrogen atoms, 1 oxygen atom and 1 hydrogen atom = 9 atoms)

Element is 3 ( Carbon, Hydrogen and Oxygen)

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4 years ago

For each of the following amounts, calculate the mass

nalin [4]

The masses of the following amount of compound are as follows:

a. 2080.12 grams of barium iodide

b.1139.2 grams of sulphur dioxide

c. 96.25 grams of AspirinTM

d. 27.144 grams of magnesium nitrite

The molarity formula is represented as follows;

molarity = mass / molar mass

Recall we are ask to find the masses of the compounds. Therefore,

mass = molarity × molar mass

a 5.32 mol barium iodide, BaI₂

molarity = 5.32 mol

molar mass of BaI₂ = 137 + 127(2) = 137 + 254 = 391 g/mol

mass = 5.32 × 391 = 2080.12 grams.

b. ) 17.8 mol sulphur dioxide, SO₂

molarity = 17.8 mol

molar mass of SO₂ = 32 + 32 = 64 g /mol

mass = 17.8 × 64 = 1139.2 grams.

c. 1.25 mol AspirinTM, CHO₄

molarity = 1.25 mol

molar mass of CHO₄ = 12 + 1 + 64 = 77 g / mol

mass = 1.25 × 77 = 96.25 grams

d. 0.234 mol magnesium nitrite, Mg(NO₂)₂

molarity = 0.234 mol

molar mass = 24 + 14(2) + 32(2) = 24 + 28 + 64 = 116 g/mol

mass = 116 × 0.234 = 27.144 grams.

learn more on masses here: brainly.com/question/10312739?referrer=searchResults

6 0

2 years ago

2C(s) + 2H2(g) + 52.4kJ ⇋ C2H4(g)

PtichkaEL [24]

Answer:

A. The equilibrium will shift towards the right, towards the formation of products

B. The concentration of hydrogen gas will decrease as more of it is used in the formation of products

C. Increasing the temperature at which the reaction is performed will increase the concentration of C2H4, the product of the reaction.

Explanation:

The given reaction is an exothermic reaction as it requires the addition of extra energy of about 52.4KJ in the form of heat for the reaction to proceed towards product formation.

According to L' Chtler principle, when an external constraint is applied to A given system in equilibrium, equilibrium position will shift so as to annul the effect ofnthe constraint imposed on the system.

Therefore, the answers tonthe questions above are given below as follows :

A. The equilibrium will shift towards the right, towards the formation of products in order to remove the effect of the additional heat since the forward reaction is endothermic.

B. The concentration of hydrogen gas will decrease as more of it is used in the formation of products .

C. Increasing the temperature at which the reaction is performed will increase the concentration of C2H4, the product of the reaction as the equilibrium will shift towards the right; formation of products.

3 0

3 years ago

Specific amino acids that line the selectivity filter of the K channel can dehydrate K and allow passage of that ion but cannot

Bogdan [553]

Answer:

True

Explanation:

Since on the inner and outer surfaces of the membrane, a series of negatively charged amino acids are found, which increase the local concentration of cations. The path of the ions begins on the inner surface filled with water molecules where the ion can retain its hydration sphere. Two thirds of its interior in the membrane the inside of the channel narrows in the region of the selectivity filter, forcing the ion to separate from the water molecules. Oxygen atoms in the selectivity filter replace the water molecules in the K+ hydration sphere, forming a series of coordination spheres through which the ion moves. The preferential stabilization of K+ against Na+ is the basis of the ion selectivity of this filter.

5 0

3 years ago