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3 years ago

Which practice poses the greatest safety concern?

Chemistry

2 answers:

kumpel [21]3 years ago

6 0

B. Accumulating clutter on the lab bench

Goshia [24]3 years ago

3 0

The correct option is B.

There are many housekeeping rules that one has to observe when one is working in the laboratory in order to ensure safety. One of these rules is that one should take precaution not to accumulate clutters on the work bench. Littering the work bench with clutters will limit the amount of space that one has to work and these clutters can constitute dangers, for instances, clutter can hinder access to emergency equipment during emergency situations. It is important that laboratory working bench should be kept clean and tidy at all time.

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Need help with balancing equations!

shusha [124]

Answer:

Fe2O3 + 3CO → 2Fe + 3CO2

Explanation:

the numbers in front are the numbers you need

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2 years ago

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The two electrons in a helium atom occupy

IRINA_888 [86]

Answer:

the answer is A

Explanation:

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3 years ago

At the start of a reaction, there are 0.0249 mol N2,

gladu [14]

Answer:

Explanation:

The reaction is given as:

$N_{2(g)} + 3H_{2(g)} \to 2NH_{3(g)}$

The reaction quotient is:

$Q_C = \dfrac{[NH_3]^2}{[N_2][H_2]^3}$

From the given information:

TO find each entity in the reaction quotient, we have:

$[NH_3] = \dfrac{6.42 \times 10^{-4}}{3.5}\\ \\ NH_3 = 1.834 \times 10^{-4}$

$[N_2] = \dfrac{0.024 }{3.5}$

$[N_2] = 0.006857$

$[H_2] =\dfrac{3.21 \times 10^{-2}}{3.5}$

$[H_2] = 9.17 \times 10^{-3}$

∴

$Q_c= \dfrac{(1.834 \times 10^{-4})^2}{(0.0711)\times (9.17\times 10^{-3})^3} \\ \\ Q_c = 0.6135$

However; given that:

$K_c = 1.2$

By relating $Q_c \ \ and \ \ K_c$ , we will realize that $Q_c \ \ < \ \ K_c$

The reaction is said that it is not at equilibrium and for it to be at equilibrium, then the reaction needs to proceed in the forward direction.

7 0

3 years ago

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. When the flashbulb is set off, a chemical reaction takes place in

hoa [83]

Answer:

Oxygen and magnesium come together in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction.

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3 years ago

How many moles of silver are there in 6.9 x 10^28 silver atoms?

Juli2301 [7.4K]

Answer:

1.2 x 10⁵ moles Ag (2 sig. figs.)

Explanation:

1 mole any substance (elements or compounds) => 6.023 x 10²³ particles of specified substance

∴ 6.9 x 10²⁸ atoms Ag = 6.9 x 10²⁸ Ag atoms / 6.023 x 10²³ Ag atoms/mole Ag

= 1.145608501 x 10⁵ moles Ag (calculator answer)

= 1.2 x 10⁵ moles Ag (2 sig. figs.)

6 0

2 years ago

Read 2 more answers