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3 years ago

the position-time graph shows the motion of four people. label the lines on graph need on the motion description in this table.

Chemistry

1 answer:

sertanlavr [38]3 years ago

3 0

Line 1: straight horizontal line
Line 2: straight line at a slope
Line 3: exponential growth curve
Line 4: the topmost curve (the one that initially increases but then starts levels out)

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What types of elements form covalent bonds?

spayn [35]

Covalent bonds form when electrons are shared between two nonmetals.

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3 years ago

Nountains are formed at continental plates that converge because they have similar _______.

zheka24 [161]

Because of how they grow

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3 years ago

If we start with 8000 atoms of radium-226 how much would remain after 3200 years?

olya-2409 [2.1K]

<h3>Answer:</h3>

2000 atoms

<h3>Explanation:</h3>

We are given the following;

Initial number of atoms of radium-226 as 8000 atoms

Time taken for the decay 3200 years

We are required to determine the number of atoms that will remain after 3200 years.

We need to know the half life of Radium

Half life is the time taken by a radio active material to decay by half of its initial amount.

Half life of Radium-226 is 1600 years

Therefore, using the formula;

Remaining amount = Original amount × 0.5^n

where n is the number of half lives

n = 3200 years ÷ 1600 years

= 2

Therefore;

Remaining amount = 8000 atoms × 0.5^2

= 8000 × 0.25

= 2000 atoms

Thus, the number of radium-226 that will remain after 3200 years is 2000 atoms.

6 0

3 years ago

The maps above show a front as it moves east across the United States. Which of these describes the weather change that can be e

kobusy [5.1K]

It’s D,the cold will bring cooler temperatures.....:)

4 0

3 years ago

A variation of the acetamidomalonate synthesis can be used to synthesize serine. The process involves the following steps: Ethox

Alex73 [517]

Answer:

See detailed mechanism in the image attached

Explanation:

The mechanism shown in detail below is the synthesis of serine in steps.

The first step is the attack of the ethoxide ion base on the diethyl acetamidomalonate substrate giving the enolate and formaldehyde.

The second step is the protonation of the oxyanion from (1) above to form an alcohol as shown.

Acid hydrolysis of the alcohol formed in (3) above yields a tetrahedral intermediate, a dicarboxyamino alcohol.

Decarboxylation of this dicarboxyamino alcohol yields serine, the final product as shown in the image attached.

5 0

4 years ago

the position-time graph shows the motion of four people. label the lines on graph need on the motion description in this table.​

the position-time graph shows the motion of four people. label the lines on graph need on the motion description in this table.