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3 years ago

BRAINLIEST IF EXPLANATION IS GIVEN AND ANSWER IS CORRECT:

Chemistry

1 answer:

Volgvan3 years ago

7 0

Answer:

Q = 2997.69 J

Explanation:

Given that,

The mass of ice, m = 15.6 grams

The temperature increases from -8.76 degrees Celsius to 85.9 degrees Celsius.

The specifc heat of ice is 2.03 J/g°C

We need to find the amount of energy required. The formula for energy required is given by :

$Q=mc\Delta T\\\\=15.6\times 2.03\times (85.9-(-8.76))\\\\=2997.69\ J$

So, the required heat is equal to 2997.69 J.

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A mixture of 10.0 g of Ne and 10.0 g Ar have a total pressure of 1.60 atm. What is the partial pressure of Ar

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The partial pressure of Ne is 1.06 atm. The answer is a. 1.1 atm

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When lithium nitride, Li3N(s) , is treated with water, H2O(l) , ammonia, NH3(g) , is produced. Predict the formula of the gas pr

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<u>Answer:</u> The gas produced when sodium phosphide reacts with water is phosphine.

<u>Explanation:</u>

When sodium phosphide reacts with water molecule, it leads to the production of flammable, poisonous gas known as phosphine along with the production of sodium hydroxide.

The chemical reaction for the reaction of sodium phosphide with water follows the equation:

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3 years ago

40.32 kg NaHCO3

Alex17521 [72]

In 40.32 kg of NaHCO₃, there are 2.890 × 10²⁶ formula units of NaHCO₃.

<h3>What is a formula unit?</h3>

A formula unit is the empirical formula of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations.

Step 1: Convert 40.32 kg to g.

We will use the conversion factor 1 kg = 1000 g.

40.32 kg × (1000 g/1 kg) = 4.032 × 10⁴ g

Step 2: Convert 4.032 × 10⁴ g to moles.

We will use the molar mass of NaHCO₃ as the conversion factor.

4.032 × 10⁴ g × (1 mol/84.01 g) = 479.9 mol

Step 3: Convert 479.9 moles to formula units (fu).

We will use Avogadro's number as the conversion factor.

479.9 mol × (6.022 × 10²³ fu/1 mol) = 2.890 × 10²⁶ fu

In 40.32 kg of NaHCO₃, there are 2.890 × 10²⁶ formula units of NaHCO₃.

Learn more about formula units here: brainly.com/question/2165878

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2 years ago

Many scientists have contributed to the current accepted atomic model. Which of the following would be a reasonable description

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<span>B. The model gradually changed as new scientific data was gathered.</span>

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A 3.78-gram sample of iron metal is reacted with sulfur to produce 5.95 grams of iron sulfide. Determine the empirical formula o

Alexeev081 [22]

Answer:

The answer to your question is FeS₃

Explanation:

Data

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mass of FeS

Chemical Balanced Reaction

Fe + S ⇒ FeS

Process

1.- Convert the grams to moles

For Iron

55.85g of Fe -------------- 1 mol

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x = (3.78 x 1) / 55.85

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For Sulfur

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3.- Write the empirical formula

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