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Schach [20]
3 years ago
7

Chemists predict the geometry of molecules based on the repulsion of electron pairs. Molecules can be represented by the general

formula AXY, where Y is the number of peripheral atoms. We would expect the geometric shape of a molecule represented by the formula AX3 to be
A) linear.

B) tetrahedral.

C) trigonal planar Eliminate

D) trigonal bipyramidal
Chemistry
2 answers:
REY [17]3 years ago
7 0

Answer:

i think b

Explanation:

Brrunno [24]3 years ago
4 0
B- tetrahedral should be the answer
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Express each of the following in standard form.
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A sample of helium gas has a pressure of 1.20 atm at 22°c. at what celsius temperature will the helium reach a pressure of 2.00
sukhopar [10]
Gay-Lussac's law gives the relationship between pressure and temperature of a gas.
it states that for a fixed amount of gas of constant volume pressure is directly proportional to temperature. 
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\frac{P1}{T1} =  \frac{P2}{T2}
where parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation.
temperature should be in the kelvin scale,
T1 = 22 °C + 273 = 295 K
substituting the values in the equation 
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What is an isotope ? And how do we use it ?
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Somewhat of the same element, have same amount of protons but different number of neutrons. <span />
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A solution is made containing 4.6 g of sodium chloride per 250g of water.
lozanna [386]

Answer:

\large \boxed{1.81 \, \%}

Explanation:

\text{Mass percent} = \dfrac{\text{mass of solute} }{\text{mass of solution}} \times 100 \, \%

Data:

Mass of NaCl =      4.6 g

Mass of water = 250    g

Calculations:

Mass of solution = mass of NaCl + mass of water = 4.6 g + 250 g = 254.6 g.

\text{\% m/m} = \dfrac{\text{4.6 g} }{\text{254.6 g}} \times 100 \, \% = \mathbf{1.81 \, \%}\\\\\text{The percent by mass of NaCl is $\large \boxed{\mathbf{1.81 \, \%}}$}

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