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Montano1993 [528]
3 years ago
15

PLEASE HELP

Chemistry
2 answers:
Serhud [2]3 years ago
6 0

Answer:

The answer to your question is: number 2 is correct.

Explanation:

Formula

                     F   =  m  x  a

                     a = \frac{F}{m}

The formula shows that acceleration and mass and inversely proportional, then if the mass increases 3 times, then the acceleration must diminishes 3 times.

1. The object will accelerate the same amount as before because the mass does not affect the object’s acceleration. This option is incorrect, the acceleration must diminish.

2. The object will accelerate 1/3 as much because if you apply the same net force but increase the mass, the acceleration will decrease.  This option is correct, is what i describe above.

3. The object will not accelerate because now it is too heavy. this option is wrong, because the object will accelerate.

4. The object will accelerate 3 times as much because if you apply the same net force and increase the mass, the acceleration will increase. This option s incorrect, the acceleration will diminish not increase.

Feliz [49]3 years ago
6 0

Answer:

2.  The object will accelerate 1/3 as much because if you apply the same net force but increase the mass, the acceleration will decrease.

Explanation:

This is an example of Newton's Second Law of motion.

Force = mass * acceleration (a).

So if the  mass is m and the force is 2:

2 = m * a  So a = 2/m

If the mass is increased  to 3m then

2 = 3m * a2   where a2 is the new acceleration, so  

a2 = 2/3m.

Comparing the 2 accelerations:

= 2/3m / 2/m

= 2/3m * m /2

= 2/6

= 1/3 of the previous acceleration.

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6 0
3 years ago
g The boiling of water is a Question 4 options: chemical and physical damage chemical change because a gas (steam) is given off
Strike441 [17]

Answer:

physical change because the gaseous water is chemically the same as the liquid

Explanation:

Matter can be defined as anything that has mass and occupies space. Any physical object that is found on earth is typically composed of matter. Matter are known to be made up of atoms and as a result has the property of existing in states.

Generally, matter exists in three (3) distinct or classical phases and these are; solid, liquid and gas.

A physical change can be defined as a type of change that only affects the physical form of a chemical substance (matter) without having any effect on its chemical properties. Thus, a physical change would only affect the physical appearance and properties of a chemical substance (matter) but not its chemical properties.

This ultimately implies that, a physical change result in a change of matter from one form or phase (liquid, solid or gas) to another without a corresponding change in chemical composition.

Hence, the boiling of water is considered to be a physical change because the gaseous water is chemically the same as the liquid i.e there isn't any changes in chemical composition of water when boiling.

8 0
2 years ago
What two elements are used to make a laser pen light?
irina1246 [14]

Answer:

Helium and Neon

Explanation:

6 0
2 years ago
How many moles (of molecules or formula units) are in each sample? 79.34 g cf2cl2?
Alona [7]
From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of fluorine = 18.99 grams
molecular mass of chlorine = 35.5 grams
Therefore:
one mole of CF2Cl2 = 12 + 2(18.99) + 2(35.5) = 120.98 grams
Therefore, we can use cross multiplication to find the number of moles in 79.34 grams as follows:
mass = (79.34 x 1) / 120.98 = 0.6558 moles

Now, one mole contains 6.022 x 10^23 molecules, therefore:
number of molecules in 0.65548 moles = 0.6558 x 6.022 x 10^23
                                                              = 3.949 x 10^23 molecules
7 0
2 years ago
ammonia gas is used as refrigerant 0.474 atm. Pressure is required to change 2000 cm3 sample of ammonia initially at 1.0 atm to
Andreas93 [3]

Answer: The pressure required is 0.474 atm

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto \frac{1}V}   (At constant temperature and number of moles)

The equation is,

{P_1V_1}={P_2V_2}

where,

P_1 = initial pressure of gas = 1.0 atm

P_2 = final pressure of gas = ?

V_1 = initial volume of gas = 2000cm^3

V_2 = final volume of gas = 4.22dm^3=4220cm^3    (1dm^3=1000cm^3)

Now put all the given values in the above equation, we get:

{1.0\times 2000}={P_2\times 4200}

P_2=0.474atm

The pressure required is 0.474 atm

5 0
2 years ago
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