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3 years ago

Second pic is the possible answers- science- pls help- ill give brainliest-

Chemistry

2 answers:

sweet [91]3 years ago

5 0

Answer:

Explanation:

trial 2 was the tallest

tiny-mole [99]3 years ago

5 0

Answer:

The data from trial 3 are inconsistent with the data from trials 1 and 2.

Explanation:

I say this because if you look at the chart, using none for trials one and two ended with very little growth, same for "a little", but with " a lot" trial three remains inconsistent from trials one and two. For trials one and two, the growth of the plant increases as the amount of fertilizer increases, but with trials 3, it starts off tall, and shrinks in size as the fertilizer increases, which is opposite of trials one and two.

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How many atoms are present in 2g of hydrogen gas

RSB [31]

Answer:

2 because if you look on the periodic table the number of the element tells you how many atoms is in it

Explanation:

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3 years ago

What are some common examples of solids, liquids and gas?

Sonja [21]

Solids- wood, sand, brick, rock

Liquids- water, milk, blood, coffee

Gases- air, helium, nitrogen, hydrogen

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3 years ago

Which property of water helps it move upward by capillary action

zhannawk [14.2K]

It’s the water method that helps it

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3 years ago

The normal range of the pH of blood is between 7.35 and 7.45; variations beyond this range have significant health implications.

patriot [66]

Answer:

The hydrogen ion concentrations associated with these pH value 7.35 is $4.5\times 10^{-8} M$

The hydrogen ion concentrations associated with these pH value 7.45 is $3.6\times 10^{-8} M$ .

Explanation:

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

1) pH = 7.35

Putting values in above equation, we get:

$7.35=-\log[H^+]$

$[H^+]=4.467\times 10^{-8} M\approx 4.5\times 10^{-8} M$

The hydrogen ion concentrations associated with these pH value 7.35 is $4.5\times 10^{-8} M$

2) pH = 7.45

Putting values in above equation, we get:

$7.45=-\log[H^+]$

$[H^+]=3.548\times 10^{-8}M \approx 3.6\times 10^{-8} M$

The hydrogen ion concentrations associated with these pH value 7.45 is $3.6\times 10^{-8} M$ .

8 0

3 years ago

A sample of neon occupies a volume of 478 mL at STP. What will be the volume of the neon when the pressure is reduced to 93.3 kP

Andre45 [30]

The volume of neon when the pressure is reduced to 93.3 kPa is 519 mL.

Explanation:

The kinetic theory of gases is mostly based on Boyle's law. From the Boyle's law, the pressure experienced by any gas molecules is inversely proportional to volume of the gas molecules. Also this inverse relation is obeyed if and only if the number of moles and temperature of the gas molecules remained constant.

So, $P=\frac{1}{V}$

So if there is a change in pressure then there will be inverse change in volume. That means if there is decrease in the pressure of gas molecules then there will be increase in the volume and vice versa.

So the Boyle's law is combined as $P_{1} V_{1} = P_{2} V_{2}$

As here the initial pressure or $P_{1}$ is 1 atm or 101.3 kPa and the initial volume is 478 mL. Similarly, the final pressure is 93.3 kPa and the final volume will be

$101.3*10^{3}*478*10^{-3} = 93.3*10^{3} * V_{2}$

$V_{2} = 519 mL$

So, the volume of neon when the pressure is reduced to 93.3 kPa is 519 mL.

5 0

4 years ago