How to clams get calcium?

Answers

Answer 1
Answer: They eat the nutrients from the seaweed in the water.
Answer 2
Answer: They began to filter the water around them for calcium.

This is also how they produce the shells , They would collect calcium from the water around and slowly "release loose glue" to push up to the front of the outer layer and it drys to be harder.

I really hope that this helps you out a lot.

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Are the following physical or chemical changes.1.Lighting a match
2.Cooking waffles
3.Baking a cake

Answers

They are all chemical changes. Think of a chemical change as you can never get something back to the way it was. (A lit match can't be turned back into a new one, waffles can't be turned back into waffle mix, and a cake can't be turned back into cake batter.)

Physical change would be something like slicing cheese or evaporating water. (The sliced cheese is still cheese, and the water turns into steam which can then be turned back into a liquid and it's still water - just in the air.)
chemical reactions because the chemical formula is changed in the reaction

What type of substances is filtration useful for seperating? Give me an example.

Answers

Filtration is useful for separating sediments that are carried in water for easy drinking without the risk of disease - an example of this is a water purifier

HELP WILL MARK BRAINLISTWhich of the diagrams is the correct model for the element beryllium?

#12

Answers

Answer:

B is the correct model of beryllium.

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

For example  in case of beryllium:

The atomic number of beryllium is 4.

The atomic mass is 9 amu.

Number protons = 4

Number of electrons = 4

Number of neutrons = 9-4 = 5

So b is correct answer because 5 neutrons and 4 protons are present with in nucleus while 4 electrons are present out side.

I believe your answer is B.

How is the mass of 1 mole of an element determined

Answers

According to the concept of Avogadro's number there are 6.023×10²³ elementary entities in an element which when multiplied by atomic mass gives the  mass of 1 mole of an element.

What is Avogadro's number?

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number.

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One mole (abbreviated mol) is equal to 6.022×1023 molecular entities (Avogadro's number), and each element has a different molar mass depending on the weight of 6.022×1023 of its atoms (1 mole). The molar mass of any element can be determined by finding the atomic mass of the element on the periodic table.

What are 2 food making processes?

Answers

Two main food-making processes include cooking and fermentation. Cooking involves preparing and combining ingredients to create a dish, such as a pizza, whereas fermentation uses bacteria, yeast or mold to convert sugars to alcohol, gases or organic acids and is a key process in making bread, cheese, and wine.

There are numerous food-making processes, but two primary ones include cooking and fermentation.

For instance, when making pizza, the process involves inputs like ingredients, the efforts of the pizza maker, and tools and materials for cooking and serving. This process involves different stages such as preparing the dough, spreading the sauce, adding toppings, and baking the pizza in an oven.

Another prominent food making process is fermentation, which is highly involved in the production of foods and beverages. It uses bacteria, mold, or yeast to convert sugars to alcohol, gases, or organic acids. A familiar example of this process is alcohol fermentation, which produces ethanol and is used in making bread products and alcoholic beverages.

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Photosynthesis and chemosynthesis

What is density of an apple

Answers

The density of an apple is³ respectively calculated as 0.7427 and 0.2401 g/cm3.