What is the question mark

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Answer 1

Answer: It is likely asking you to determine the coefficient on the chemical and balance the equation.

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You are given a glass rod that is negatively charged and a pinwheel that has a negative charge. What will happen when the glass rod is brought close to the pinwheel? Why?

Answers

Answer:

they will repel each other

Explanation:

When these two are brought close to one another they will repel each other. This is similar to what happens with magnets, when two objects share the same polarity one object will create a repulsive force upon the second object and push it away. This repellent force is caused by an electric field from the same charged electrons in the atoms of the object. Since in this case both the glass rod and the pinwheel have a negative charge they will repel each other when they come into proximity of one another.

How many lone pairs are on the central atom of BrF3?

Answers

According to the molecular geometry, there are two lone pairs on central atom of BrF₃.

What is molecular geometry?

Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.

It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.

They provide information about geometry by taking into considerations the vibrational and rotational absorbance of a substance.Neutron and electron diffraction techniques provide information about the distance between nuclei and electron density.

Learn more about molecular geometry,here:

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Answer:

BrF3 has 2 lone pairs (4 unshared electrons)

Explanation:

Calculate the mass percent of oxygen in KMnO4.

Answers

Answer: 40.496%

Hope this helps! (:

6.579 rounded to nearest hundreth

Answers

Answer:

6.58

Explanation:

A sample of phosgene gas at an initial concentration of 0.500 m is heated at 527 °c in a reaction vessel. at equilibrium, the concentration of co (g) was found to be 0.046 m. calculate the equilibrium constant for the reaction at 527 °c.

Answers

Answer : The equilibrium constant will be - 0.454

Explanation : The reaction is given below;

$COCl_(2) \ \textless \ ----\ \textgreater \ CO + Cl_(2)$

We need to find Equilibrium constant - $K_(c)$ ;

$K_(c)$ = [CO] [ $Cl_(2)$ ] / $[COCl_(2) ]$

So, $K_(c)$ = [0.046] X [0.046] / [0.5 - 0.046]

Therefore, $K_(c)$ = 0.454

. An open manometer is filled with mercury. The mercury level is 12mm higher on the side open to the atmosphere. What is the total pressure of the gas, in kPa, if the atmospheric pressure is 100.8 kPa?