A metal having a mass of 44 grams is dropped in 118.2 cm3of water and sinks to the bottom. The volume
of the water and object is 124.3 cm3
. What is the density of the metal?

Answers

Answer 1

Answer: The volume of the lump that was dropped into the water is

(124.3 - 118.2) = 6.1 cm³

The density of the lump is (mass)/(volume) = 44 / 6.1 = 7.21 gm per cm³.

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Calcium reacts with water. This reaction is represented by the balanced equation below. The aqueous product of this reaction can be heated to evaporate the water, leaving a white solid, Ca(OH)2(s).Ca(s) + H2O(l) ==> Ca(OH)2(aq) + H2(g)Compare the electrical conductivity of the aqueous product in the reaction to the electrical conductivity of the white solid that remains after the water is evaporated from the solution. Write the chemical name of the base produced in the reaction. State one change in reaction conditions that will increase the rate of the reaction.

A neutral charge by an atom is caused by which of the following conditions? a. presence of neutrons in the nucleus
b. balance in number of protons and neutrons
c. balance in number of electrons and protons
d. the balance of electrons in each electron shell

Answers

Answer C is the correct answer. Balance in number of electrons and protons

Answer:

C.) balance in number of electrons and protons.

Explanation:

Its the right answer i swear!!!

What is the frequency of an event?Group of answer choices

Probability

Degree

Expected occurrence

Identification

Answers

Answer:

Probability

Explanation:

Final answer:

The frequency of an event is a measure of how often the event occurs within a given time period.

Explanation:

The frequency of an eventrefers to how often the event occurs within a given time period. It is a measure of the rate at which the event happens. Frequency can be calculated by dividing the number of times the event occurs by the total time period. Probability, on the other hand, is a measure of the likelihood of an event happening.

For example, if a student attends class 4 days a week, the frequency of attending class is 4/7 or 0.57. Probability, on the other hand, refers to the likelihood of an event occurring. It is a measure of the chances of the event happening. Probability is expressed as a number between 0 and 1, where 0 means the event will not happen and 1 means the event will definitely happen.

Learn more about Frequency of an event here:

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How many neutrons are in an atom of 187 Re

Answers

Answer: I believe the answer is 112.

Explanation:

What is the major difference between a solution and an ordinary mixture?

Answers

An ordinary mixture can be separated without using chemicals, a solution cannot.

The major difference between a solution and an ordinary mixture is that solution is homogeneous and an ordinary mixture is heterogeneous.

Pierce conducts an experiment in which waves collide in a way that the energy increases, which means that has occurred

Answers

Answer:

It means the waves collides and constructive interference occurred.

Explanation:

If the two waves coming from the opposite direction collide with each other, there are two way of their interference.

Constructive interference: An interference which results in the increase in energy. And it is when crust of a wave comes on the crust of second wave.
Destructive interference: An interference which results in decrease in energy of the resulting wave and colliding waves cancel the result of each other.

Hence in experiment there will be constructive interference.

Answer:

Explanation:

I took the test!

Calvin pushes a lawnmower 20 meters with a force of 2 N. How much work has he done?none
20 Nm
22 Nm
40 Nm

Answers

Work is done when a force is applid to an object in motion. It is calculated by multiplying the amount force applied to the object and the distance the object travels.

Work = force x distance
Work = 2 N x 20 m
Work = 40 Nm

Thus, the answer is the 4th option which is 40 Nm.

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A student is trying to classify an unidentified, solid gray material as a metal or a non metal. which question will best help the student classify the material?F. Is the material malleable or ductile?G. Does the material feel hard to the touch?H. Will the material float in water?J. Does the material feel rough or smooth?

Who wrote the banned book that Giordano Bruno read that gave him the idea that the Universe was infinite?