3 years ago

Which of the following statements is untrue in regard to sound traveling in air?

Chemistry

2 answers:

Papessa [141]3 years ago

8 0

the answer is B Good luck!

Karo-lina-s [1.5K]3 years ago

5 0

I think the answer is B.

You might be interested in

Antoine put some metal into a container with air. He closed the container. He measured the weight of the closed container with t

Mandarinka [93]

Answer:

the same

Explanation:

due to the law of conservation of mass, the mass will not change

7 0

3 years ago

Phosphoric acid is delivered to a drinks factory in

FrozenT [24]

Answer:

Because it might be reactive or may lose its property in liquid form..

8 0

3 years ago

What number should be placed in front of Fe to balance this chemical

andrew-mc [135]

the answer is B. 2

because there is 2 iron on the right side so you need another two on the left side to balance it out

6 0

3 years ago

How many atoms of N are in 0.82 g of NaNO3? ( molar conversion)

VMariaS [17]

The number of atoms N = 5.8 x 10²¹

<h3>Further explanation</h3>

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12

1 mole = 6.02.10²³ particles

mass of N in 0.82 g of NaNO₃ (MW NaNO₃: 85 g/mol) :

$\tt mass~N=\dfrac{Ar~N}{MW~NaNO_3}\times mass~NaNO_3\\\\mass~N=\dfrac{14}{85}\times 0.82\\\\mass~N=0.135~g$

moles of N :

$\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{0.135}{14}=0.0096$

The number of atoms N :

$\tt N=n\times No\\\\N=0.0096\times 6.02\times 10^{23}\\\\N=5.8\times 10^{21}~atoms$

4 0

3 years ago

Uncrewed vehicles launched into space to collect data are called what?

ozzi

B. Rovers are what you are looking for

6 0

3 years ago