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3 years ago

Which area is most likely to support a marsh ecosystem?.

Chemistry

1 answer:

andriy [413]3 years ago

5 0

Answer:

A location that is humid, would most likely support a marsh ecosystem.

Explanation:

The Florida Everglades are an example of a marsh :)

"Marshes are a type of wetland ecosystem where water covers the ground for long periods of time. Marshes are dominated by herbaceous plants, such as grasses, reeds, and sedges."

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Taxonomy of pygmy rabbit

Colt1911 [192]

Taxonomy of pygmy rabbit

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Lagomorpha

Family : Leporidae

Genus: Brachylagus

Species: B. idahoensis

6 0

3 years ago

A generic solid, X, has a molar mass of 78.2 g/mol. In a constant-pressure calorimeter, 12.6 g of X is dissolved in 337 g of wat

MissTica

Answer:

a) Q = 2047.8 J (ΔH is negative because it's an exothermic reaction)

b) ΔH = -12.7 kJ /mol

Explanation:

Step 1: Data given

Molar mass of X = 78.2 g/mol

In a constant-pressure calorimeter, 12.6 g of X is dissolved in 337 g of water at 23.00 °C.

The temperature rise to 24.40 °C

The specific heat of the solution = 4.184 J/g°C

Step 2: Calculate the total mass

Total mass of the solution is given by

Total mass = 12.6 grams + 337 grams = 349.6 grams

Step 3: Calculate heat

Q = m*c*ΔT

⇒ m = the total mass = 349.6 grams

⇒ c = the specific heat of solution = 4.184 J/g°C

⇒ ΔT = The change of temperature = T2 - T1 = 24.40 - 23.00 = 1.40 °C

Q = 2047.8 J (ΔH is negative because it's an exothermic reaction)

What is the enthalpy of the reaction?

Calculate number of moles = mass/ molar mass

Moles X = 12.6 grams / 78.2 g/mol

Moles X = 0.161 moles

ΔH = -2047.8 J / 0.161 moles

ΔH = -12719.3 J/mol = -12.7 kJ /mol

8 0

3 years ago

Which particles make up the nucleus of an atom?

ad-work [718]

Answer:

D. Protons & Neutrons

Explanation:

Protons and Neutrons are found in the nucleus of the atom, and the electrons orbit the shells.

4 0

4 years ago

Read 2 more answers

7th grade help me plzzzz

Flauer [41]

Answer: I think it’s compounds only

Explanation:

6 0

3 years ago

Lithium has two stable isotopes with masses of 6.01512 amu and 7.01600 amu. The average molar mass of Li is 6.941 amu. What is t

Dvinal [7]

Answer : The percent abundance of Li isotope-1 and Li isotope-2 is, 6.94 % and 93.1 % respectively.

Explanation :

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

Let the fractional abundance of Li isotope-1 be 'x' and the fractional abundance of Li isotope-2 will be '100-x'

For Li isotope-1 :

Mass of Li isotope-1 = 6.01512 amu

Fractional abundance of Li isotope-1 = x

For Li isotope-2 :

Mass of Li isotope-2 = 7.01600 amu

Fractional abundance of Li isotope-2 = 100-x

Average atomic mass of Li = 6.941 amu

Putting values in equation 1, we get:

$6.941=[(6.01512\times x)+(7.01600\times (100-x))]$

By solving the term 'x', we get:

$x=694.048$

Percent abundance of Li isotope-1 = $\frac{694.048}{100}=6.94\%$

Percent abundance of Li isotope-2 = 100 - x = 100-6.94 = 93.1 %

6 0

3 years ago