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iVinArrow [24]
3 years ago
8

Which statement is true regarding a chemical reaction?

Physics
1 answer:
liberstina [14]3 years ago
7 0

Answer:

The total number of atoms does not change, so mass is conserved in the reaction.

Explanation:

If you like my answer than please mark me brainliest thanks

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Use the periodic table from the lesson to answer the following question.
kodGreya [7K]

Answer:

18.99u or 19u

Explanation:

Mass number=No of protons+No of neutrons

\\ \sf\longmapsto 9+10

\\ \sf\longmapsto 19u

  • Fluorine has atomic number=9
  • The Electronic configuration is given by

\\ \sf\longmapsto 1s^22s^22p^5

7 0
3 years ago
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What is the frequency of a wave that has a wavelength of 0.39 m and a speed
gogolik [260]

Answer:

<h3>The answer is option B</h3>

Explanation:

The frequency of a wave can be found by using the formula

f =  \frac{c}{ \lambda}  \\

where

c is the velocity

From the question

wavelength = 0.39 m

c = 86 m/s

We have

f =  \frac{86}{0.39}  \\  = 220.512820...

We have the final answer as

<h3>200 Hz</h3>

Hope this helps you

7 0
4 years ago
How much net force is required to accelerate a 5 kg toy car, initially at rest to a velocity of 3 m/s in 6 s?
inna [77]

Answer:

force = 0.20N .F = m ×a .&amp; a = v/t then the f = m×v/t.

Explanation:

4 0
3 years ago
Quem é ou foi Elon Musk??
mario62 [17]

Explanation:

Elon Reeve Musk FRS (/ ˈiːlɒn /; nascido em 28 de junho de 1971) é engenheiro, designer industrial, empresário de tecnologia e filantropo. Ele é o fundador, CEO, CTO e designer-chefe da SpaceX; investidor inicial, [nota 1] CEO e arquiteto de produto da Tesla, Inc.; fundador da The Boring Company; co-fundador da Neuralink; e co-fundador e co-presidente inicial da OpenAI. Ele foi eleito membro da Royal Society (FRS) em 2018. Em 2018, ele foi classificado em 25º na lista da Forbes das pessoas mais poderosas do mundo, e foi classificado em primeiro lugar na lista da Forbes dos líderes mais inovadores de 2019. Em 29 de julho de 2020, seu patrimônio líquido foi estimado em US $ 68 bilhões e ele foi listado pela Forbes como a nona pessoa mais rica do mundo. Ele é o CEO com o mandato mais longo de qualquer fabricante automotivo globalmente.

3 0
3 years ago
A piece of metal has a weight of 6.5 N when it is in air and 3.0 N when it is submerged into water. What is the buoyant force on
Kamila [148]

Answer:

The buoyant force on the piece of iron is 3.5 newtons.

Explanation:

According to the Archimedes' Principle, the piece of metal experiments a buoyant force equal to the weight of the displaced fluid. By Newton's Laws, we have the following formula:

F_{B} - W_{P}+W_{F} = 0 (1)

Where:

F_{B} - Buoyant force on the piece of iron, in newtons.

W_{P} - Weight of the piece of metal, in newtons.

W_{F} - Weight of the fluid displaced by the piece of metal, in newtons.

F_{B} = W_{P}-W_{F}

If we know that W_{P} = 6.5\,N and W_{F} = 3\,N, then the buoyant force on the piece of iron is:

F_{B} = 6.5\,N - 3\,N

F_{B} = 3.5\,N

The buoyant force on the piece of iron is 3.5 newtons.

7 0
3 years ago
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