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2 years ago

Which of the following correctly shows the word equation for the formation of water from oxygen and hydrogen?

Chemistry

2 answers:

timama [110]2 years ago

9 0

Answer:

The correct answer is option B.

Explanation:

Water is formed formed by combination of oxygen and hydrogen atoms.

The chemical equation for the formation of the water is given as:

$2H_2+O_2\rightarrow 2H_2O$

According to reaction, 2 moles of hydrogen gas reacts with 1 mole of oxygen produce 2 moles of water molecules.

Hydrogen + Oxygen → Water

zheka24 [161]2 years ago

5 0

A shows okay please mark it brainliest

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Which of the following is not a nanoscale object?

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If I am correct I would believe that it would be a muscle cell.

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Butyl butyrate is an ester that is a naturally occurring oil used in the flavor industry for its fruity scent. If the steam dist

Snezhnost [94]

Answer:

The correct answer is 62.5 %.

Explanation:

Based on the given information, the partial pressure of butyl butyrate is 50 mmHg and the partial pressure of water is 710 mmHg.

Hence, the total pressure is 710+50 = 760 mmHg

According to Dalton's law of partial pressure,

Partial pressure = mole fraction * total pressure

Mole fraction of water is,

Partial pressure of water/Total pressure = 710/760 = 0.93

Similarly, the mole fraction of butyl butyrate is,

Partial pressure of butyl-butyrate/Total pressure = 50/760 = 0.07

Therefore, mole% of water is 0.93 * 100 = 93 %

For calculating mass%,

Mass of H2O = 0.93 * 18 = 16.8 grams (The molecular mass of water is 18 grams per mole)

The molecular mass of butyl-butyrate is 144 gram per mole

The mass of butyl-butyrate = 144 * 0.07 = 10.08 grams

The mass percent of water will be,

Mass % of water/Total mass % * 100 = 16.8 / 10.08 + 16.8 * 100 = 62.5%.

8 0

1 year ago

KClKCl has a lattice energy of −701 kJ/mol.−701 kJ/mol. Consider a generic salt, ABAB , where A2+A2+ has the same radius as K+,K

elena-14-01-66 [18.8K]

Explanation:

It is given that lattice energy is -701 kJ/mol.

Whereas it is known that realtion between lattice energy and radius is as follows.

Lattice energy $\propto \frac{Z_{+}Z_{-}}{r}$

where, $Z_{+}$ = +2, and $Z_{-}$ = -2

Therefore, lattice energy of AB = $4 \times \text{lattice energy of KCl}$

= $4 \times -701 kJ/mol$

= -2804 kJ/mol

Thus, we can conclude that lattice energy of the salt ABAB is -2804 kJ/mol.

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1 year ago

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Answer:

Yes , the food can be served.

Explanation:

Given the food here is served at 146°F

According to FDA(US food and drug administration) Hot foods should be kept at an internal temperature of 140°F or warmer.
This is the temperature recquired to maintain the bacteria without spoiling the food .

Dishes related to eggs like quiches or soufflés should be served at a minimum of 165°F

Also given that the temperature of the food being served is 146°F which is greater than 140°F(which is the minimum value) Therefore the food can be served.

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2 years ago

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