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Snezhnost [94]
3 years ago
15

In which terrestrial biome would you expect to rake leaves? Question 5 options: taiga (coniferous forest) savanna temperate deci

duous forest tundra
Chemistry
2 answers:
seropon [69]3 years ago
3 0

The correct answer is temperate deciduous forest.

Temperate deciduous forests are situated in the mid-latitudes, in between Polar Regions and tropics having average annual temperature about 10°C, rainfall between 750 to 1500 mm. There are four distinct seasons and the vegetation includes mostly broad leaved trees such as maple, beech, oak,  hickory and chestnut.  Leaves fall in winter after changing color in autumn. Leaves grow back in spring. This is an adaption to avoid to live in cold winters.

Simora [160]3 years ago
3 0

The correct answer is C. Temperate deciduous forest

Explanation:

The temperate deciduous forest is a biome found in North America and certain areas of Europe and Asia. This biome as all forest is dominated by trees; additionally, the temperate deciduous forest is different from other ecosystems because this goes through the four seasons every year. This implies the leaves of trees change their color, later they fall and they are renewed. According to this, the temperate deciduous forest is the biome in which you would expect to rake leaves because it is in this biome the leaves of trees fall every year.

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What percent of I-125 has decayed if there are 37.5g of the original sample left?
garri49 [273]

Answer:

[(x-37.5)/x]*100%

62.5%  (assuming the original sample weighs 100.0g)

Explanation:

Let's say that the original sample is x

Mass of I-125 which has decayed: x-37.5

Percentage of decayed mass: [(x-37.5)/x]*100%

Please recheck, for this may not be the correct answer

6 0
3 years ago
If a sample contains 21.2 g N, how many moles of N does it contain?
cupoosta [38]

Hello!

If a sample contains 21.2 g N, how many moles of N does it contain?

0.66 mol

1.51 mol

14.01 mol

297.01 mol

We have the following data:  

m (mass) = 21.2 g

MM (Molar mass of Nitrogen) = 14 g / mol

n (number of moles) = ?

Formula:  

n = \dfrac{m}{MM}

Solving:  

n = \dfrac{m}{MM}

n = \dfrac{21.2\:\diagup\!\!\!\!\!g}{14\:\diagup\!\!\!\!\!g/mol}

\boxed{\boxed{n\approx 1.51\:mol}}\end{array}}\qquad\checkmark

Answer:

1.51 mol

_______________________________

I Hope this helps, greetings ... Dexteright02! =)

5 0
4 years ago
Read 2 more answers
How much heat do you need to raise the temperature of 150 g of ice from -30°C to -15°c?
OLga [1]
To solve this question, you must use the formula: q=mc(change in temperature), where q is heat, m is mass, C is specific heat and temperature change is temperature change. The specific heat for ice is 2.1kJ/Kg x K (given). The change in temperature is 15 degrees Celsius (which you should change to kelvins so you can cancel out units), or 273 + 15 = 288K. The mass is 150 grams, which is 0.15 kg. Now, we can solve for q, heat. We will do this by substituting variables into the formula. After simplifying and cancelling out units, the answer we get is: 90.72kJ.
4 0
3 years ago
A compound has the following percentages by mass: barium, 58.8%; sulfur, 13.74%; oxygen, 27.43%. Determine the empirical formula
lys-0071 [83]

Answer:

BaSO₄

Explanation:

Let's assume we have 100 g of the compound. If that's the case we would have:

  • 58.8 g of Ba
  • 13.74 g of S
  • 27.43 g of O

Now we <u>convert the masses of each element into moles</u>, using their <em>respective molar masses</em>:

  • 58.8 g Ba ÷ 137.327 g/mol = 0.428 mol Ba
  • 13.74 g S ÷ 32 g/mol = 0.429 mol S
  • 27.43 g O ÷ 16 g/mol = 1.71 mol O

We <u>divide those moles by the lowest number among them</u>:

  • 0.428 mol Ba / 0.428 = 1
  • 0.429 mol S / 0.428 ≈ 1
  • 1.71 mol O / 0.428 = 4

We can express those results as Ba₁S₁O₄, meaning the empirical formula is thus BaSO₄.

5 0
3 years ago
Which statements about the formation of the solar system are true and in a correct order?
Ymorist [56]

The statement about the formation of the solar system that are true and in a correct order are Gravitational force held the newly formed planets around the sun; small planetary objects formed; hydrogen and helium became concentrated in the outer solar system to form the outer planets. The answer is letter D.

6 0
4 years ago
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