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4 years ago

50 points!!! Match the definition to the keyword.

Chemistry

2 answers:

insens350 [35]4 years ago

4 0

Answer:

This is the same order as the definitions

Hope it helps

krok68 [10]4 years ago

3 0

Answer:

Cristae = 1

Diffusion = 4

Semipermeable = 3

Fermentation = 5

Carbon Fixation = 2

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Can someone please help me !

Rama09 [41]

This demonstration is most likely trying to show you potential energy. The rock is heavier than the pebble and will therefore displace more sand upon impact showing that the rock stores more potential energy than the pebble does when they are elevated to the same height (in this case the height is the height of the table).
This makes sense since potential energy is equal to mass times the acceleration due to gravity times height (PE=mgh) and the only thing that is changing is the mass of the object being suspended which means that the heavier object (the rock) will have more potential energy.

I hope this helps. Let me know if anything is unclear.

6 0

3 years ago

Threats faced by the Everglades and the Louisiana wetlands.

Viefleur [7K]

Answer:

Invasive species, runoff pollution, and climate change.

Explanation:

Invasive species, such as Burmese pythons, threaten the Florida Everglades because they are not native to the natural habitat. Pythons eat the native animals, but they don't have any predators.

Pollution from nearby farms and roads enters the water and damages the ecosystem of the Everglades and Louisiana wetlands. Toxic chemicals lead to detrimental effects for both humans and wildlife.

Humans have drained swampy areas to allow for development. However, this has led to the Everglades drying up and even burning in recent years.

6 0

4 years ago

Determine the concentration of sulfuric acid that needed 47 mL of 0.39M potassium hydroxide solution to neutralize a 25 mL sampl

Ugo [173]

0.73 M is the concentration of sulfuric acid that needed 47 mL of 0.39M potassium hydroxide solution to neutralize a 25 mL sample of the sulfuric acid solution.

Explanation:

Data given:

Volume of the base = 47 ml

molarity of the base= 0.39 M

volume of the acid = 25 ml

molarity of the acid =?

For titration reaction between acid and base, the volume or molarity of any of the base or acid can be determined. The formula used:

Macid X Vacid = Vbase x Mbase

Macid = $\frac{Vbase X M base}{V acid}$

putting the values given in the rearranged equation above:

Macid = $\frac{0.39 x47}{25}$

= 0.73 M

The concentration of the sulphuric acid needed is 0.73 M.

3 0

4 years ago

50.0kg of nitrogen and 10.0kg 0f hydrogen are mixed to produce ammonia . calculate the ammonia formed, identify the limiting rea

Nana76 [90]

Answer:

Nitrogen is limiting reactant and 30.4kg of ammonia can be formed

Explanation:

Nitrogen, N₂, reacts with hydrogen, H₂ to produce ammonia, NH₃, as follows:

2N₂ + 3H₂ → 2NH₃

Where 2 moles nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia

To solve this question we must find the moles of each reactant in order to find limiting reactant. With limiting reactant we can find the moles and the mass of ammonia formed as follows:

Moles N2 -Molar mass: 28g/mol-

50000g * (1mol / 28g) = 1786 moles N2

Moles H2 -Molar mass: 2g/mol-

10000g * (1mol / 2g) = 5000 moles H2

For a complete reaction of 5000 moles H2 are needed:

5000 mol H2 * (2mol N2 / 3mol H2) = 3333 moles N2. As there are just 1786 moles, Nitrogen is limiting reactant

The moles of ammonia that can be produced are 1786 moles because 2mol N2 = 2moles NH3.

The mass of ammonia -Molar mass NH3: 17g/mol- is:

1786 moles NH3 * (17g / mol) = 30362g =

30.4kg of ammonia can be formed

3 0

3 years ago

What are the lanthanide & actinide series?

ch4aika [34]

Answer:

The lanthanides and actinides together are sometimes called the inner transition elements.

Explanation:

They are called this because they come up in the periodic table after actinium

Hope this helps :)

8 0

3 years ago