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m_a_m_a [10]
2 years ago
7

1

Chemistry
1 answer:
max2010maxim [7]2 years ago
7 0
Answer: the mass of the object

Explanation: To find density, the equation d= m/v is needed where m= mass and v= volume
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Which of the following statements are true ?
Paha777 [63]
I think the correct answer from the choices listed above is the first option. The statement that is true would be that compounds that can form more hydrogen bonds are more soluble in water. Hope this answers the question. Have a nice day.
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3 years ago
160
IrinaK [193]
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7 0
3 years ago
A weightlifter can lift 495 lbs. How many kg is that? Please provide a step-by-step procedure.
iogann1982 [59]

Answer:

Explanation:

2.2 pounds = 1 kg

495 pounds = x

2.2/495 = 1/x               Cross multiply

2.2*x = 495 * 1             Divide by 2.2

2.2x/2.2 = 495/2.2

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5 0
3 years ago
In a reversible reaction, chemical equilibrium is attained when the (A) rate of the forward reaction is greater than the rate of
zepelin [54]

Answer:  (D) concentration of the products remains constant.

Explanation:

The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.

For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction.Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.

Thus at chemical equilibrium, the amount of product and reactant remains constant because the rates of the forward and reverse reactions are equal.

A chemical equilibrium is dynamic in nature forward and backward reactions continue for indefinite time and never stops.

8 0
3 years ago
Please I need the answer asap
Nadusha1986 [10]

The energy needed to raise the temperature of water from 22.0ºC to 90.0ºC is c. 28.4 kJ.

<h3>What is specific heat?</h3>

The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.

By the formula Q = mc\Delta T

Q is the heat

m is the mass

c is the specific heat

Now, c = 4.184 J/g.K

The change in temperature is 22.0 ºC to 90.0 ºC

Putting the value in the equation

Q = 100 \times 4.184 \times (90.0 - 22.0)\\\\Q = 4.184 \times 68.0\\ \\Q= 284.5 \;J

Thus, the energy needed to raise the temperature of water from 22.0ºC to 90.0ºC is 28.4 kJ

Learn more about specific heat

brainly.com/question/11297584

#SPJ1

4 0
2 years ago
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