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2 years ago

Elements that are usually dull, brittle and do not conduct electricity are know as______.

Chemistry

1 answer:

Anton [14]2 years ago

8 0

Answer:

nonmetal

Explanation:

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Plz help.chemissttrryy

Gelneren [198K]

Attached is the answer

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2 years ago

How many ml of 0.5M of HNO3 would be needed to react with 85ml of 0.75M of KOH

olganol [36]

Answer: 127.5ml

Explanation:

To calculate the volume of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $HNO_3$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

We are given:

$n_1=1\\M_1=0.5M\\V_1=?mL\\n_2=1\\M_2=0.75M\\V_2=85mL$

Putting values in above equation, we get:

$1\times 0.5\times V_1=1\times 0.75\times 85\\\\V_1=127.5mL$

Thus 127.5 ml of 0.5M of HNO3 would be needed to react with 85ml of 0.75M of KOH

6 0

2 years ago

How do you balance C6H12O6 + O2 --> CO2 + H2O?

Contact [7]

C6H12O6 + O2 --> CO2 +H2O 

In the balancede form we have: 

C6H12O6 + 6O2 ---> 6CO2 + 6H2O 

C -6 , H -12 and O - 18 
in both sides.

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3 years ago

Darwin proposed the “theory of evolution by natural selection” in which he stated that certain members of species have adaptatio

AnnyKZ [126]

Answer:

survive

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8 0

3 years ago

What determines which element an atom is ?

TiliK225 [7]

The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.

hope this helps, if not, your free to give me 1 star

3 0

2 years ago