CHEMISTRY HIGH SCHOOL

Which term identifies a type of nuclear reaction?A) transmutation
B) neutralization
C) deposition
D) reduction

Answers

Answer 1
Answer: A nuclear reaction is B) Neutralizer. 

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Given the balanced equation representing a reaction:NH3(g) + H2O(l) ==>NH4+(aq) + OH-(aq)According to one acid-base theory, the NH3(g) molecules act as(1) an acid because they accept H+ ions(2) an acid because they donate H+ ions(3) a base because they accept H+ ions(4) a base because they donate H+ ions

According to modern atomic theory, the exact location of a(n) ____________________ is uncertain.

Answers

The correct answer is electrons. According to the modern atomic theory, the exact location of an electron is uncertain. But the region in which there will be high in probability of finding an electron is in the orbitals of the electron cloud. 

is going to be electrons

In general, if the temperature of a chemical reaction is increased, the reaction ratea. increases.
b. decreases.
c. remains the same.
d. cannot be predicted.

Answers

In general, if the temperature of a chemical reaction is increased, the reaction rate increases as well. The correct answer is A.

Predict the changes in the number of particles based the diagram.A) Pressure is indirectly related to moles.
B) Volume is proportionally related to moles.
C) Moles remains constant as pressure changes.
D) Temperature is directly related to the moles.

Answers

Pressure is indirectly related to volume.

As the volume increases at a constant temperature, the pressure decreases.

The changes in the number of particles based on the diagram is that Volume is proportionally related to moles. The answer is letter B. The rest of the choices do not answer the question above.

Given the balanced equation:I + I==> I2
Which statement describes the process represented by this equation?
(1) A bond is formed as energy is absorbed.
(2) A bond is formed and energy is released.
(3) A bond is broken as energy is absorbed.
(4) A bond is broken and energy is released.

Answers

The answer is (2) A bond is formed and energy is released. The left side of equation is I atom and the right side of equation is I2 molecule. So the bond is formed between I atom to form I2 molecule. And forming bond will release energy while breaking bond will absorb energy.

A chemical system that resists changes in pH and prevents large swings in the pH is called __________. a) A base b) An acid c) An anion d) A buffer

Answers

Answer:

Explanation:

okay so first add two to four and the ten

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.

Answers

If the pen is 10.5cm long, it is 0.105 meters. This can be worked out by considering that there are 100cm's in 1 meter, so you need to divide 10.5 by 100. You then move the decimal place 2 places to the right (because of the two zeros), which leads you to your answer of 0.105.

A pen measuring 10.5 cm long is equivalent to 0.105 meters.

Further Explanation

Length  

  • Length refers to a measurement of distance. It is the distance between two points.

S.I units  

  • The S.I. units of lengths. However, length can be measured using other units such as millimeters, centimeters, kilometers, etc.

Metric system unit of measurement  

  • It is a system of measurement that uses units such as gram, liter, and meter to measure mass, capacity and length respectively.
  • This system measures length based on meters, such that all the other units of lengths are based on an inter-conversion of units in meters.

Conversion of units measuring length

1 centimeter = 10 millimeters  

1 meter = 100 centimeters  

1 meter = 1000 millimeters  

1 kilometer = 1000 meters  

1 kilometer = 1000000 centimeters, and so forth.

Conversion of larger units to small units  

  • To convert larger units of measurement to smaller units we multiply we multiply the number of larger units by the appropriate conversion factor.

Conversion of smaller units to larger units

  • When converting smaller units of measurements to larger units of measurements we divide the number of smaller units by the appropriate factor.
  • For example, to convert cm to m, we divide the number of cm by 100.

In the question;

The pen measures 10.5 cm  

But, 1 meter = 100 centimeters

Thus;

10.5 cm will be equivalent to;

= 10.5 cm/100 cm  

= 0.105 meters

Therefore, a pen measuring 10.5 cm in length is equivalent to 0.105 meters.

Keywords: Length, meters, centimeters, metric unit system  

Learn more about:  

Level: Middle school  

Subject: Mathematics  

Topic: Metric system of measurements  

Sub-topic: Units of measuring length  
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