2 years ago

Which process is happening in the reaction that is shown

Chemistry

1 answer:

erastova [34]2 years ago

4 0

I believe it’s B I apologize if it’s wrong

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An object was measured by a worker as

Gre4nikov [31]

Answer:

$\boxed{2.8 \, \%}$

Explanation:

$\text{Percent error} = \dfrac{\lvert \text{Measured - Actual}\lvert}{ \text{Actual}} \times100 \, \%$

Data:

Predicted = 17.4 cm

Actual = 17.9 cm

Calculation:

$\text{Percent error} = \dfrac{\lvert 17.4 - 17.9\lvert}{17.9} \times 100 \, \% \\\\= \dfrac{\lvert-0.5\lvert}{17.9} \times 100 \, \% = \dfrac{0.5}{17.9} \times 100 \, \% \\\\= 0.028 \times 100 \, \% = \textbf{2.8 \%}\\\\\text{The percent error in the measurement is } \boxed{\textbf{2.8 \%}}$

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2 years ago

A common demonstration in chemistry courses involves adding a tiny speck of manganese(IV) oxide to a concentrated hydrogen perox

Nuetrik [128]

Answer:

$2H_{2}O_{2} ---> 2H_{2}O + O_{2}$

2,2,1 being the coefficients

Explanation:

These type of question rely on the person answering the question knowing the formula of hydrogen peroxide. Hydrogen peroxide has a formula that is very similar to that of water except it has a two after the O, which makes it very easy to remember.

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3 years ago

Oxygen atom gains two electrons to become an oxygen ion. What is its electric charge?

VashaNatasha [74]

Negative 2

Each electron contributes a minus one charge.

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¿Qué objetos se pueden construir mediante los biomateriales metálicos?

Kobotan [32]

Answer:

https://uach.mx/articulo/2017/10/20/biomateriales-como-implantes-en-el-cuerpo-humano/

Explanation:

utilizar este sitio web

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2 years ago

Which of the following are observations? Select all that apply.

iris [78.8K]

Answer:

All are correct

Explanation:

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