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3 years ago

you have two samples of gray powder both which are flammable these are powders the same substance explain why

Chemistry

2 answers:

nasty-shy [4]3 years ago

7 0

The amount of matter stays the same between the substances,

Jet001 [13]3 years ago

5 0

Answer:it help in gravity

Explanation:

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If Chris throws the baseball 60 meters in 4 seconds what is the average speed of the football

Marina86 [1]

Average speed (aka average velocity) is the change in displacement (distance) over the chance in time. $\frac{60 m}{4 sec}= V. V=15 m/sec$ The average velocity of the baseball is 15 meters/sec

4 0

2 years ago

Some alkenes have geometric (cis-trans) isomers because ________. all of the carbon atoms in the compound are rigid and cannot r

faust18 [17]

Answer:

the carbon atoms in the double bond cannot rotate

Explanation:

Isomers refer to molecules that have a distinct arrangement of the atoms in the molecule but have the same molecular formula.

Alkenes refer to a series of unsaturated hydrocarbons that contain ethylene and propylene.

Some alkenes have geometric (cis-trans) isomers because the carbon atoms in the double bond cannot rotate.

7 0

2 years ago

An atom of fluorine has an atomic number of 9 and an atomic mass of 19. The atom contains

muminat

The number of neutrons is the difference between the mass number and the number of protons.

You get the element by looking at the atomic number which is the number of protons. In this case, it is 9 and yes, it is F.

However it is not an atom because it has 10 electrons so you have a fluoride ion F-. 

The number of neutrons = 19 - 9 = 10

Therefore, the answer is D.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

8 0

2 years ago

Explain examples of a physical and chemical change of matter

monitta

HEY DEAR..

PHYSICAL CHANGE

Those Changes in which no new substances are formed are called physical changes. it is a temporary changes which can be reversed easily to form the original substance.

Example:- Melting of ice , Making a solution, Glowing of an electric bulb , freezing of water etc.

CHEMICAL CHANGE

Those changes in which new substances are formed are called chemical changes. it means it is permanent changes which are usually irreversible.

Example:- Burning of charcoal, fuels and cutting of trees, even digestion of food is in chemical change.

HOPE ITS HELPFULLL

BE BRAINLY.

6 0

3 years ago

H2SO4(aq) --> 2H+ + SO4^2–

horsena [70]

I'm guessing
A. The chemical equilibrium will shift to the right.

7 0

2 years ago

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you have two samples of gray powder both which are flammable these are powders the same substance explain why ​

you have two samples of gray powder both which are flammable these are powders the same substance explain why