What is the shape of a water molecule?a. bent
b. linear
c. pyramidal
d. tetrahedral

Answers

Answer 1
Answer: a. bent..................................

Related Questions

Which of the following is a change from a less condensed to a more condensed state of matter?A.) Boiling B.) Evaporating C.) Condensation D.) Melting
Entropy measures _____.a. disorder b. energy c. heat transferred d. force
A few pieces of dry ice, CO2(s), at -78°C are placed in a flask that contains air at 21°C. The flask is sealed by placing an uninflated balloon over the mouth of the flask. As the balloon inflates, the dry ice disappears and no liquid is observed in the flask.State the direction of heat flow that occurs between the dry ice and the air in the flask. Write the name of the process that occurs as the dry ice undergoes a phase change in the flask. [1]Compare the entropy of the CO2 molecules in the dry ice to the entropy of the CO2 molecules in the inflated balloon.
Atoms are the building blocks of elements, molecules, compounds, and mixtures.true or false?
Which activity is the best demonstration of J. J. Thomson’s use of creativity in his work?

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Answers

Answer:

A just A

Explanation:

Answer:

so is c they have the same mass.

Choose all of the examples where there would be an increase in the electric or magnetic force

Answers

Answer:

Explanation:

1) Increase the amount of charge on each object

2) Decrease the distance between each object

3) Increase the mass of the objects.

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How many images of a candle will be formed if it is placed between two plane mirrors inclined at an angle of 45?

Answers

A candle placed between two plane mirrors inclined at an angle of 45 degrees will form 7 images. This is due to multiple reflections between the mirrors. The number of images depends on the angle between the mirrors.

In physics, when a candle is placed between two plane mirrors inclined at an angle of 45 degrees, 7 images will be formed. This happens due to multiple reflections between the mirrors. As per the formula for number of images n = 360/θ - 1, where θ is the angle between the mirrors, for an angle of 45 degrees, we get n = 360/45 - 1 = 7. The actual number of images can be less than this if they overlap each other.

Learn more about Reflections here:

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Which of the following requires an increase in kinetic energy?liquid ➡ solid

gas ➡ solid

gas ➡ liquid

solid ➡ gas

Answers

Answer:  solid ➡ gas

Explanation:

Solid state : In this state, the molecules are arranged in regular and repeating pattern. The molecules are closely packed that means they are fixed and vibrate in place but they can not move from one place to another. and thus have least kinetic energy.

For example : Copper

Liquid state : In this state, the molecules are present in random and irregular pattern. The molecules are closely packed but they can move from one place to another.. they have intermediate kinetic energy between solids and gases.

For example : water

Gaseous state : In this state, the molecules are present in irregular pattern. The molecules are not closely packed and they can move freely from one place to another and spread out.  They have highest kinetic energy.

For example : Helium gas

solid -> gas will need the increase in kinetic energy

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Answers

Answer:

Selenium (Se)

Explanation:

To identify an element, we look at its number of protons.

We are given 32 protons, so the 32nd element of the Periodic Table is Selenium (Se).

How many grams of sodium sulfide can be produced when 45.3 g Na react with 105 g S? Unbalanced equation: Na + S → Na2S

Show, or explain, all of your work along with the final answer.

Answers

The chemical reaction would be as follows:

2Na + S → Na2S

We are given the amount of the reactants to be used in the reaction. We use these to calculate the amount of product. We do as follows:

45.3 g Na ( 1 mol / 22.99 g ) = 1.97 mol Na
105 g S ( 1 mol / 32.06 g ) = 3.28 mol S

The limiting reactant would be Na. We calculate as follows:

1.97 mol Na ( 1 mol Na2S / 2 mol Na ) (78.04 g / mol ) = 76.87 g Na2S produced