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3 years ago

Sorry for asking for too much but me needs helppppp

Chemistry

2 answers:

zalisa [80]3 years ago

7 0

Answer:

physical

Explanation:

pashok25 [27]3 years ago

5 0

Answer:

Physical property

Explanation:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

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A chunk of tin weighing 18.5 grams and originally at 97.38 °C is dropped into an insulated cup containing 75.7 grams of water at

weqwewe [10]

Answer:

22.44°C will be the final temperature of the water.

Explanation:

Heat lost by tin will be equal to heat gained by the water

$-Q_1=Q_2$

Mass of tin = $m_1=18.5 g$

Specific heat capacity of tin = $c_1=0.21 J/g^oC$

Initial temperature of the tin = $T_1=97.38^oC$

Final temperature = $T_2$ =T

$Q_1=m_1c_1\times (T-T_1)$

Mass of water= $m_2=75.7 g$

Specific heat capacity of water= $c_2=4.184 J/g^oC$

Initial temperature of the water = $T_3=21.52^oC$

Final temperature of water = $T_2$ =T

$Q_2=m_2c_2\times (T-T_3)$

$-Q_1=Q_2$

$-(m_1c_1\times (T-T_1))=m_2c_2\times (T-T_3)$

On substituting all values:

$-(18.5 g\times 0.21 J/g^oC\times (T-97.38^oC))=75.7 g\times 4.184 J/g^oC\times (T-21.52 ^oC)$

we get, T = 22.44°C

22.44°C will be the final temperature of the water.

5 0

4 years ago

Consider the volumes of benzaldehyde and acetone that you used for your scaled-down version of the lab (as described on the Aldo

lutik1710 [3]

Answer:

Aldol condensation is possible only when their is alpha Hydrogen atom is present. It ia present only in the acetophenone and not in benzaldehyde.

Explanation:

3 0

4 years ago

In which type of chemical reaction do two or more substances combine to form one substance?

pishuonlain [190]

The answer is
synthesis

4 0

4 years ago

Read 2 more answers

Help me pls worth 40 point or brainlyest :) <3

enot [183]

Maybe because meiosis have more chromosomes than mitosis but don't put that on there but that maybe it it because in class we have not went over that yet

7 0

2 years ago

1. Displacement vectors of 10 m west and 14 m west make a resultant vector that is

Iteru [2.4K]

Answer:

B 24 m west I belive that it is the answer

3 0

4 years ago