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3 years ago

Help answer the questions in the photo above

Chemistry

2 answers:

Stels [109]3 years ago

7 0

Pulling force plus Friction force equals the force of the person

DanielleElmas [232]3 years ago

5 0

Let the person at the Left be A and Person at the right be B

then the force by person A will be

Pulling force + Frictional Force = the force by the person

which is,

20N+11N=29N

then the force by person B will be,

25N+5N=30N

1) the net force will be 30N-29N=1N

2) the force are unbalanced as the net force acting on the object is not zero.

3) the rope will move towards the right as there is a net force of 1N towards the right.

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What type of organic compound contains the following functional group?

Shtirlitz [24]

That's a ketone's functional group :)

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4 years ago

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What is the smallest unit of a compound

Musya8 [376]

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The smallest unit of a compound is a molecule, which is made up of atoms held together by bonds.

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3 years ago

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A 225-g sample of aluminum was heated to 125.5 oc, then placed into 500.0 g water at 22.5 oc. (the specific heat of aluminum is

Sidana [21]

when heat gained = heat lost

when AL is lost heat and water gain heat

∴ (M*C*ΔT)AL = (M*C*ΔT) water

when M(Al) is the mass of Al= 225g

C(Al) is the specific heat of Al = 0.9

ΔT(Al) = (125.5 - Tf)

and Mw is mass of water = 500g

Cw is the specific heat of water = 4.81

ΔT = (Tf - 22.5)

so by substitution:

∴225* 0.9 * ( 125.5 - Tf) = 500 * 4.81 * (Tf-22.5)

∴Tf = 30.5 °C

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3 years ago

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Loretta and her friends want to find out which of their pets can run the fastest. Which kind of scientific investigation should

Feliz [49]

A. and D. would be the best pick for this sort of experiment, but maybe (unlikely) B. because you could see how they could react in certain situations, how they react to danger but I suggest A.

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4 years ago

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¿Cómo se escribe la fórmula molecular (orden de los iones)?

cluponka [151]

Answer:

A la izquierda el catión y a la derecha el anión.

Explanation:

¡Hola!

En este caso, y basado en las normas IUPAC para la escritura de las fórmulas moleculares, es necesario primero escribir el catión a la izquerda, seguido del anión a la derecha, tal y como se muestra en los siguientes ejemplos, recordando que el catión es el ion cargado positivamente y el anión, negativamente:

$K^+Cl^-\\\\Ag_2^+(SO_4)^{2-}$

Los cuales son cloruro de potasio y sulfato de plata respectivamente. También es necesario tener en cuenta que los metales tienden a ser cationes por su capacidad de perder electrones, mientras que los no metales a ganarlos y por ende resultar como aniones.

¡Un gusto ayudarte!

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3 years ago