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4 years ago

Water could be made to boil lower than its normal boiling point of 100 degrees Celsius at 92 degrees Celsius by?

1 answer:

3 0

Water could be made to boil lower than its normal boiling point of 100 degrees Celsius at 92 degrees Celsius by lowering the atmosphere or external pressure.

The boiling point is the temperature at which the vapor pressure of liquid equals the external or atmosphere pressure.

So, if you decrease the external pressure the temperature needed for the liquid reach the lower external pressure is also lower..

You can accomplish by taking the water to higher levels in the Earth (atmosphere pressure at high altitudes is lower than at sea level) or by creating vaccum.

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According to periodic trend, which of the following most likely has the highest ionization energy?

horsena [70]

Answer:

Explanation:

Ionization energy increases across a period.

All other elements are ahead in the period as compared to Br.

5 0

3 years ago

In the Sandwiches mode, select the "Cheese" option and observe the equation given for the preparation of a cheese sandwich. When

Nesterboy [21]

1- 4 bread slices and 5 cheese slices

2- 6 bread slices and 2 cheese slices

3- 6 bread slices and 4 cheese slices

4- 8 bread slices and 3 cheese slices

5- 2 bread slices and 1 cheese slice

6- 4 bread slices and 1 cheese slice

7- 6 bread slices and 3 cheese slices

8- 8 bread slices and 5 cheese slices

Answer:

1)Bread is the limiting ingredients:

•4 bread slices and 5 cheese slices

•6 bread slices and 4 cheese slices

•8 bread slices and 5 cheese slices

2)Cheese is the limiting ingredients:

•6 bread slices and 2 cheese slices

•8 bread slices and 3 cheese slices

•4 bread slices and 1 cheese slice

3)There are no limiting ingredient

•6 bread slices and 3 cheese slices

•2 bread slices and 1 cheese slice

Explanation:

In a certain chemical reaction,if one of the reactant is present in small amount,the reaction stops abruptly once all of that reactant is used up.This reactant is called a limiting reagent. While the other ractant is called the excess reagent. Similarly, in the above mentioned question,the ingredient that was limiting was less in number while the other ingredient was in excess.

5 0

3 years ago

Which electron configuration of the 4f energy sublevel is most stable?

umka21 [38]

Answer: both options A and D

Explanation:

Half filled and completely filled orbitals are more stable than any other configuration since they are more symmetrical and energy exchange Occurs readily.

So 4f^7& 4f^14 are more stable

7 0

3 years ago

PLEASE PLEASE HELP ITS PAST DUE AND IM CLUELESS ILL GIVE BRAINLIEST TO THE FIRST CORRECT ANSWER

aev [14]

Answer:

$\boxed {\boxed {\sf A. \ Change \ in \ state \ of \ matter}}$

Explanation:

A physical change occurs when only the physical properties change. They are generally reversible and no new substances are formed.

However, in a chemical change, the chemical structures and properties change, plus new substances are formed.

Let's analyze each answer choice.

1. Change in state of matter

The state of matter is a physical property, so this is a physical change.

2. Precipitate was formed

A precipitate is a solid formed in a liquid solution. This is a new substance and a chemical change.

3. Unexpected change in odor.

A change in odor is a sign of chemical change.

4. Formation of bubbles

Bubbles signify the formation of gas or a new substance.

So, the best answer choice is <u>A. change in state of matter</u>

4 0

3 years ago

Read 2 more answers

Calculate the pH of a solution that contains 2.4 × 10 -5 M H 3O at 25°C. 9.38 11.60 4.62 4.17 2.40

lutik1710 [3]

Answer:

4.62

Explanation:

Using the equation -log[H3O+] = pH,

-log(2.4 x 10^-5) = 4.62

3 0

3 years ago

Read 2 more answers