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3 years ago

Forces that change an object motion by touching the object are _______ forces

1 answer:

7 0

Forces are pushes and pulls that may change the motion of an object. Balanced forces result in an object remaining at rest or moving at a constant speed. Unbalanced forces result in the acceleration of an object. An object's motion depends on how it changes position.

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A 25. 0-ml sample of 0. 150 m hydrocyanic acid is titrated with a 0. 150 m naoh solution. What is the ph beforeany base is added

Ray Of Light [21]

Answer:

stars,auroras,a neon sign

Explanation:

just did it

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3 years ago

Molar mass of lead(ll)chloride

Fiesta28 [93]

I look for your answer 278.1 g/mol I hope this help

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3 years ago

which value of an element is calculated using both the mass and the relative abundance of each of the naturally occurring isotop

UkoKoshka [18]

The value of an element that is used is the molar mass. An isotope is another form of the element. The difference is there are different number of protons in each isotope. Molar mass is a unit to measure the mass of the substance over the amount of substance in terms of moles.

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3 years ago

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Which factor causes a decrease in the rate of dissolution?

garik1379 [7]

Answer:

The correct option of the first option

Explanation:

Dissolution of a solute in a solution is the process in which the solute interacts with the solvent leading to the disappearance of the solute to form a solution. Rate of dissolution is primarily affected by three factors namely

Stirring of the solution: Stirring the solution causes the solute to interact more with the solvent, thus increasing the rate of dissolution.

Surface area of the solute: The smaller the surface area of the solute, the more easier it is for it (the solute) to interact with the solvent. Hence, the smaller the surface area, the faster the rate of dissolution.

Temperature of the solvent: An increase in temperature of the solvent causes the generally causes more things to dissolve in this solvent due to increased energy of molecules in the solvent, which causes the molecules of the solute and solvent to interact more.

A decrease in the amount of solute will reduce the amount of interaction the solute (since it is in lesser quantity) have with the solvent hence the rate of dissolution will also be low (even though a solution will still be formed).

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3 years ago

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Three samples of wood with the same volume were weighed. Sample A has a mass of 224.96 g, sample B has a mass of 0.55632 Ibs, an

san4es73 [151]

Answer:

Sample C has the highest density

Explanation:

Step 1: data given

Sample A has a mass of 224.96 grams

Sample B has a mass of 0.55632 lbs = 252.3425 grams

Sample C has a mass of 0.30648 kg = 306.48 grams

The volume is for all the sample equal

Step 2: Calculate density

We suppose the volume is 1000 mL

Density = mass / volume

Density sample A = 224.96 grams / 1000 mL = 0.22496 g/mL

Density sample B = 252.3425 grams / 1000 mL = 0.2523425 g/mL

Density sample C = 306.48 grams / 1000 mL = 0.30648 g/mL

Sample C has the highest density

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3 years ago