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3 years ago

Sand dollars typically live in the intertidal zone. Which adaptation do sand dollars most likely have?

Chemistry

2 answers:

AveGali [126]3 years ago

5 0

Answer:

burrowing in sandy or muddy substrates.

Explanation:

sand dollar also known as a sea cookie or snapper biscuit in New Zealand, or pansy shell in South Africa refers to species of extremely flattened, burrowing sea urchins belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are known as sea biscuits.Sand dollars can also be called "sand cakes" or "cake urchins".

Sand dollars live beyond the low water line on top of or beneath the surface of sandy or muddy areas. Sand dollars are frequently found together on the ocean bottom.

ziro4ka [17]3 years ago

3 0

Neck to the sand in the water hope this help can i get brinlist??

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Solid aluminum (AI) and oxygen (O_2) gas react to form solid aluminum oxide (Al_2O_3). Suppose you have 7.0 mol of Al and 9.0 mo

Nimfa-mama [501]

Answer:

There will be formed 3.5 moles of Al2O3 ( 356.9 grams)

Explanation:

Step 1: Data given

Numbers of Al = 7.0 mol

Numbers of mol O2 = O2

Molar mass of Al = 26.98 g/mol

Molar mass of O2 = 32 g/mol

Step 2: The balanced equation

4Al(s) + 3O2(g) → 2Al2O3(s)

Step 3: Calculate limiting reactant

For 4 moles Al we need 3 moles O2 to produce 2 moles Al2O3

Al is the limiting reactant, it will be consumed completely (7 moles).

O2 is in excess. There will react 3/4 * 7 = 5.25 moles

There will remain 9-5.25 = 3.75 moles

Step 4: Calculate moles Al2O3

For 4 moles Al we'll have 2moles Al2O3

For 7.0 moles of Al we'll have 3.5 moles of Al2O3 produced

Step 5: Calculate mass of Al2O3

Mass Al2O3 = moles Al2O3 * molar mass Al2O3

Mass Al2O3 = 3.5 moles* 101.96 g/mol

Mass Al2O3 = 356.9 grams

There will be formed 3.5 moles of Al2O3 ( 356.9 grams)

3 0

3 years ago

How can you identify an element that is a metalloid?

Dominik [7]

On the periodic table, the elements colored yellow, which generally border the stair -step line , are considered to be metalloids

7 0

2 years ago

What is Br mass number?

Fofino [41]

Name Bromine

Symbol Br

Atomic Number 35

Atomic Mass 79.904 atomic mass units

Number of Protons 35

Number of Neutrons 45

Number of Electrons 35

Melting Point -7.2° C

Boiling Point 58.78° C

Density 3.119 grams per cubic centimeter

Normal Phase Gas

Family Halogens

Period 4

Cost $4.90 per 100 grams

3 0

3 years ago

How many moles in .5g of sodium bromide?

Genrish500 [490]

I'm not sure how many sign fig's you are required to have.
However I think the final answer would be 0.05 Moles, because of the .5g, that is considered 1 sign fig.

6 0

2 years ago

Science plz help due soon 6th grade Major grade

pentagon [3]

Answer:

the answer is d.

Explanation:

because the core is deepest then is the mantle and the lithpsphere is last .

I put a picture incase you need a visual example.

5 0

2 years ago