Type of change that produces a new substance

Answers

Answer 1

Answer: A chemical change produces a new substances. Examples of chemical changes are burning a cooking egg

Answer 2

Answer: The type of change that produces a new substance is called a chemical change. A chemical change breaks bonds and also forms new ones.

Example: Rusting Iron.

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PLEASE ANSWER ASAP!! I WILL GIVE BRAINLIEST!! Which of the following are basic challenges of life for every organism? A. Obtaining and using energyB. ReproducingC. Maintaining structureD. All of the above
326LA cylinder with a movable piston contains 0.500 mol of helium, He, atsom temperature. More helium was added to the cylinder and the volumeas adjusted so that the gas pressure remained the same. How manyholes of helium were added to the cylinder if the volume was changedrom 2.00 L to 2.70 L? (The temperature was held constant.) *"our answer!This is a required questionB. How many grams of Helium would be added in question #2? *

If an atom has 5 electrons outside of its nucleus, which combination of protons and neutrons would result in a neutral atom?

Answers

5 protons, 5 neutrons

Indicate whether each of the following substances would be more soluble in H2O or C6H14:(a) KI

(b) C8H18

(c) grease

(d) CH3(CH2)12OH

(e) NaC2H3O2

Answers

Answer:

H2O-a,e, C6H14 - b,c,d

Explanation:

H2O - (a) KI, e(NaC2H3O2) because they are ionic compounds

C6H14 -(b) C8H18, (c) grease, (d) CH3(CH2)12OH because they are mostly un-polar.

Final answer:

KI and NaC2H3O2 are ionic and therefore more soluble in polar solvents like H2O, while C8H18, grease, and CH3(CH2)12OH are nonpolar and more soluble in nonpolar solvents like C6H14.

Explanation:

The solubility of a substance generally follows the principle of 'like dissolves like'. That means polar substances are more soluble in polar solvents (like H2O) and nonpolar substances are more soluble in nonpolar solvents (like C6H14).

KI is ionic, therefore it is polar and more soluble in H2O.
C8H18 is nonpolar, hence more soluble in C6H14.
Grease is nonpolar, so it is more soluble in C6H14.
CH3(CH2)12OH is nonpolar due to the long hydrocarbon chain, making it more soluble in C6H14, despite the polar OH group at the end.
NaC2H3O2 is ionic, hence it is polar and more soluble in H2O.

Learn more about Solubility here:

brainly.com/question/28170449

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4Fe + 3O2 → 2Fe2O3Iron combines with oxygen to form rust. Given the chemical reaction, how many grams of 4Fe + 3O2 would produce 10 g of rust?
A) 7 g
B) 10 g
C) 30 g
D) 70 g

Answers

Answer:

b) 10 g

Explanation:

Hi, the answer in simply: during a chemical reaction (that doesn't involve nuclear processes) the total mass involved is constant.

The total mass of the reactants equals the total mass of the products, althought the number of molecules may vary.

n(2Fe2O3)=10g/319.374amu=0.03mol

n(4Fe+3O2)=0.03 mol

m(4Fe+2O2)=Mn=319.374×0.03=9.58=10

What is 'Lo Salt' used for?I already know it can be used in exactly the same way as regular salt, and that it can be used to supplement your potassium intake. I was wondering if there are any more for me to write down. Thanks to anyone who replies!

Answers

It offers a route to reducing sodium intake.

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How large is the observable universe

Answers

Here goes the question with no exact answer, lol <3

Scientists tell us that the observable universe is about 90 light years but then I wonder how they calculated that because the universe is immense!

I'm sorry but I can't go deeper into explaining as that's a tough question.

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.

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