5.The synthetic polymer which can be used as a substitute for wool for making sweaters and shawls isa. Nylon b. polyester c. terylene d. acrylic

Answers

Answer 1

Answer:

Answer:

D. Acrylic is a substitute wool

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Fill in the following information for the element *if your good at these pls go to my profile and answer more related questions.*

Answers

Answer:

element name: Europium

Period: 6

Group: 9

Family: rare earth family of metals

Explanation:

Answer:

Period: 6 block

Group: f block

Family: Lanthanides

List the ways in which tadpole and frogs differ from each other?

Answers

Body Structure
A tadpole starts out as a body mass with an elongated tail. As metamorphosis takes effect, it begins sprouting legs and arms and grows small teeth that allow it to eat algae and small bugs. The body elongates, and the tail shrinks. The main difference, however, in the body structure of a tadpole is that it has gills. Gills allow the tadpole to breathe underwater. This is important because it does not have legs and arms yet, or the muscular structure to support itself on land.

Frogs have a strong muscular structure that allows them to be mobile both on land and in the water. Their hind legs are long and powerful, and their feet are webbed for greater swimming efficiency. Most importantly, mature frogs breathe through lungs instead of gills. Mature frogs can no longer breathe under water.

Movement
Tadpoles have one way of moving: swimming. Tadpoles will stay in the water until they evolve into frogs. Young tadpoles are not very proficient swimmers and attach themselves to foliage until they are more developed. As they mature, the tadpoles begin to learn to swim by moving their tails back and forth.

Frogs, on the other hand, can both swim and hop. The difference between a frog swimming and a tadpole swimming is the means of propulsion. Tadpoles use their tails, but frogs have no tails. Frogs use their hind legs and propel themselves forward in a kicking motion. On land, frogs can move by hopping around, something that tadpoles are not capable of.

Tadpoles are developing into being frogs. They have yet to develop hind legs and have a tail.

On the galapagos islands, Darwin studied many creatures, including finches. Explain what he observed and how it relates to nature selection.

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Darwin observed the beaks of the birds and how the different beaks helped the birds to eat different types of seeds.

This relates to natural selection because certain finches with say a smaller shorter beak would be able to eat only smaller seeds and fruits as to where a finch with a longer larger beak could eat larger bigger seeds and fruits.

Hope this helped! Have a great day!

A solid precipitate is formed from the reaction of lead nitrate and sodium chromate. What would be the best method to separate this solid from the solution?

Answers

The correct answer is this one: "C. Filtration." For distillation and evaporation, it would leave the soluble salt behind as well. Filtration refers to the action or process of filtering something.
Here are the choices:
A. Distillation
B. evaporation
C. Filtration
D. Sorting

Explanation:

A precipitate is an insoluble solid that does not dissolve in a chemical reaction or or mixture.

For example, $Pb(NO_(3))_(2) + Na_(2)CrO_(4) \rightarrow PbCrO_(4) + 2NaNO_(3)$

Therefore, the precipitate formed can be separated out by filtration method.

As this method will most suitably extract the precipitate and separate it from the remaining solution.

Predict the formula of magnesium argonide

Answers

Answer:The formula of magnesium argonide is H2MgO

Explanation:

Answer:

H2MgO that is the answer. have a nice day.

Which of the following statements is true?1. Dalton believed atoms were made mostly of empty space.
2. Plasmas have a net negative charge.
3. The number of protons in an element is always equal to the number of neutrons.
4. Solids have a fixed mass, volume, and shape.

Answers

Answer: Solids have a fixed mass, volume, and shape.

Explanation: Solids are the substances which have fixed shape, fixed volume and mass due to its close packed structure.

Dalton explained that all the elements are made up of small indivisible particle known as Atoms but after some time this was proved wrong as atoms is not indivisble, it conatins sub atomic particle like electrons, protons, neutrons etc.

Plasmas are considered as the fourth state of matter which contains equal quantity of positive ions and negative electrons.

The number of protons are equal to the number of electrons. The sum of number of protons and neutrons make the atomic mass quantity.

solids have a mixed mass, volume, and shape.

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