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Solnce55 [7]
4 years ago
13

Comparing Mirrors

Chemistry
2 answers:
mote1985 [20]4 years ago
4 0

Answer:

convex

convex

concave

plane

Explanation:

solniwko [45]4 years ago
4 0

Answer:

convex

convex

concave

plane

Explanation:

I just know me smart

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The Earth's diameter at the equators is _____ its diameter at the poles. A:greater than B:equal to C:less than
Svetlanka [38]
I think the answer is greater than
7 0
3 years ago
The liquid inside the cell is called
rodikova [14]

Answer:

The cytoplasm

Explanation:

Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and various organic molecules. Some intracellular organelles, such the nucleus and mitochondria, are enclosed by membranes that separate them from the cytoplasm.

Pls mark as brainliest

hope this helps:)

5 0
3 years ago
Thorium-234 has a half life of about 25 days. What percent of the thorium will remain after 125 days
solong [7]

Answer:

3.125% will remain after 125 days

Explanation:

Given data:

Half life of Th-234 = 25 days

Percent of thorium remain after 125 days = ?

Solution:

Number of half lives = T elapsed / half life

Number of half lives = 125 days / 25 days

Number of half lives = 5

At time zero =100%

At 1st half life = 100%/2 = 50%

At second half life = 50%/2 = 25%

At third half life = 25%/ 2 = 12.5%

At 4th half life = 12.5% /2 = 6.25%

At 5th half life = 6.25% /2 = 3.125%

4 0
4 years ago
What is the missing number in the nuclear reaction shown below 175 78 pt?
Dmitry [639]
Above question is incomplete. Complete question is
<span>What is the missing number in the nuclear reaction 175 78 pt -- 4 2 He plus 76 Os?
....................................................................................................................
Solution:

Reaction involved in present nuclear event is 
</span>175 78 Pt      →          4 2 He          +          76 Os

In above nuclear reaction, atomic mass number of Os is missing. The atomic mass number of Os = 175 - 4 = 171

Thus, complete nuclear can be written as
175 78 Pt      →          4 2 He          +       171  76 Os

3 0
3 years ago
Read 2 more answers
Which of the following reagents is/are likely to be used to form the Britton–Robinson buffer solution used in the experiment?
Ierofanga [76]

Answer:

I. A polyprotic, weak acid

II. Na2HPO4

Explanation:

Buffer solutions are those that, upon the addition of an acid or base, are capable of reacting by opposing the part of the basic or acid component to keep the pH fixed.

Buffers consist of hydrolytically active salts that dissolve in water. The ions of these salts are combined with acids and alkalis. These hydrolytically active salts are the products that result from the reaction between weak acids and strong alkalis such as calcium carbonate (from carbonic acid and calcium hydroxide) or between strong acids and weak alkalis such as ammonium chloride (a from hydrochloric acid and ammonium hydroxide).

A buffer acid reacts when a weak acid or weak base is combined with its corresponding hydrolytic salt in a water solution, a buffer system called a buffer is formed. As in this case a weak polyrotic acid with Na2HPO4, which allows the solution to be maintained at a pH of 3.8 against small aggregate amounts of both acid and base, thus favoring the reaction at a pH of 3.8

A buffer system is not always appropriate, because the ions of some hydrolytic salts can, for example, damage organisms that come into contact with it.

4 0
3 years ago
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