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3 years ago

Explain why food chains do not tend to exceed four links.

1 answer:

3 0

Energy is "lost" at each trophic level when you go up the chain. <span> Typically there are fewer organisms at higher trophic levels.

Hope this helps!</span>

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An element which forms an oxide that dissolves in water to form an acidic solution.

zzz [600]

Answer:

An Alkaline solution should be the answer to that.

8 0

3 years ago

What is a example of soda ash

lesya [120]

used in the manufacturing of glass, detergents chemicals and other industrial products.

4 0

4 years ago

An unused flashbulb contains magnesium and oxygen. After use, the contents are changed to magnesium oxide but the total mass doe

harkovskaia [24]

Answer: Law of conservation of mass explains these observations.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

$2Mg+O_2\rightarrow 2MgO$

Mass of reactants= mass of Mg+ mass of $O_2$ = 48 g + 32 g = 80 g

Mass of products = mass of $MgO$ = 80 g

Thus mass of reactants is equal to mass of products, thus law of conservation of mass is obeyed.

7 0

4 years ago

You use 4.98 g of Na2SO4, how many grams of barium sulfate are produced?<br><br> Na2+Ba(NO3)2= ?

Kaylis [27]

Answer:

Mass of barium sulfate = 8.17 g

Explanation:

Given data:

Mass of sodium sulfate = 4.98 g

Mass of barium sulfate produced = ?

Solution:

Na₂SO₄ + Ba(NO₃)₂ → BaSO₄ + 2NaNO₃

Moles of sodium sulfate:

Number of moles = mass/molar mass

Number of moles =4.98 g / 142.04 g/mol

Number of moles = 0.035 mol

Now we will compare the moles pf sodium sulfate and with barium sulfate.

Na₂SO₄ : BaSO₄

1 : 1

0.035 : 0.035

Mass of barium sulfate:

Mass = number of moles × molar mass

Mass = 0.035 mol ×233.4 g/mol

Mass = 8.17 g

6 0

3 years ago

To find the density of an object you would use a graduated cylinder to find what characteristic of the object?

ehidna [41]

The answer for this is B

3 0

3 years ago