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Ganezh [65]
3 years ago
15

Pleas help me i have to submit homework i hour i will mark brainliest

Chemistry
1 answer:
steposvetlana [31]3 years ago
6 0

Answer:

I can help

Explanation:

++++++++++++++++++++++++++++

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How many atoms of mercury are required to produce 3.49 L of H2 gas (density =
Setler79 [48]

The number of mercury atoms required to produce 3.49 L of H2 gas according to the equation would be 1.89 x 10^{23}

From the balanced equation of the reaction:

2Hg(l) + 2 HNO_3(aq) ---> Hg_2(NO_3)_2(aq) + H_2(g)

2 moles of Hg are required to produce 1 mole of the H2 gas.

3.49 L of H2 gas was produced and the density of the gas is 0.0899 g/L

Recall that: density = mass/volume

Mass of the H2 gas = density x volume

                                     = 3.49 x 0.0899

                                     = 0.3138 g of H2 gas

Mole of 0.3138 g of H2 gas = mass/molar mass

                                         = 0.3138/2

                                            = 0.1569 mole

Since the ratio of Hg to H2 according to the equation is 2:1, it means that the mole of Hg is twice the mole of H2.

Thus, mole of Hg = 0.1569 x 2

                                    = 0.3138 mole

According to Avogadro, 1 mole of a substance = 6.022×10^23

0.3138 mole would be:

                 0.3138 x 6.022 x 10^23

                            = 1.89 x 10^{23}

More on the number of atoms in molecules can be found here: brainly.com/question/19036641

6 0
3 years ago
Jim wants to react hydrogen and oxygen to get 36 grams of water. If he starts with 4 grams of Hydrogen (H), then how many grams
serious [3.7K]

Answer:

Mass of Oxygen = 32 grams

Explanation:

Given:

Mass of water = 36 grams

Mass of Hydrogen = 4 grams

Find:

Mass of Oxygen

Computation:

Using Law of Conservation of mass

Mass of water = Mass of Hydrogen + Mass of Oxygen

36 grams = 4 grams + Mass of Oxygen

Mass of Oxygen = 32 grams

3 0
3 years ago
Read 2 more answers
Several constructive processes helped build mountains on Earth. All BUT one of these is a way mountains can be built. That is
ValentinkaMS [17]

C) landslides.

Explanation:

Landslides is not a way in which mountains are built on earth. It is a destructive process in nature that causes the slumping and wasting of land masses.

Landslide is a form of mass wasting and does no build masses.

Volcanoes helps to build mountains on the crust and this way, igneous rocks are formed.

Deposition process upbuilds to form sedimentary rocks.

Faulting is a can also be a constructive process that builds a mountain in the case of horsts and graben

learn more:

Sedimentary rocks brainly.com/question/9131992

#learnwithBrainly

3 0
3 years ago
How come sedimentary rock become metamorphic rock
seraphim [82]
It may somehow wind up in a valcano next to the magma chamber.
5 0
3 years ago
PLEASE EXPLAIN what is glucose
antoniya [11.8K]

Answer:

(Hope this helps can I pls have brainlist (crown)☺️)

Explanation:

Glucose is the most common form of sugar in the blood and the body's primary source of energy. Glucose is derived from the meals we eat or produced by the body from other chemicals. The circulation transports glucose to the cells. Several hormones, including insulin, regulate blood glucose levels.

a simple sugar that is a component of many carbohydrates and is a vital source of energy in living things.

Blood sugar, often known as glucose, is the most common sugar present in the body. It is your body's major source of energy and comes from the food you eat. Glucose is carried by your blood to all of your body's cells, where it is used for energy.

5 0
3 years ago
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