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2 years ago

The element with the lowest melting point is: Select one: a. B b. Al c. Ga d. Tl e. All of these have the same melting point.

Chemistry

1 answer:

Semmy [17]2 years ago

7 0

The element with the lowest melting point is Ga.
Hence, Option (C) is correct answer.

<h3>What is Melting point ?</h3>

Melting point is usually defined as the temperature at which solid changes to liquid.

<h3>What is the order of melting point of B, Al, Ga, Tl ?</h3>

The melting point order of B, Al, Ga, Tl is B > Al> Tl > Ga due to structural changes, melting point increases from Ga to Tl. Hence Ga has the lowest melting point among all these.

Thus from the above conclusion we can say that The element with the lowest melting point is Ga.
Hence, Option (C) is correct answer.

Learn more about the Melting Point here: brainly.com/question/40140

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How many atoms are in 15.1g of potassium?

Natalka [10]

Answer:

2.32 x10^23 atoms

Explanation:

15.1/39.10 x (6.02 x10^23)

= 2.32 x10^23 atoms

First, you divide 15.1 g of potassium by its molar mass. (Molar mass of potassium is 39.10 g). Then you multiply using Avogadro's number (6.02 x10^23) to get your answer.

5 0

2 years ago

What is the density of a gas at 242.5K and 0.7311atm. The molar mass of this gas is 70.90g/mol

Pie

Answer:

0.384g/l

Explanation: the density version of the ideal gas law is pm=drt

in which p= pressure, m=molar mass,d=, density, r= to a constant which is 0.08206, and t=temperature so just input the values

PM=DRT. so to find d the formula would be D=RT\PM

D=<u>0.08206*242.5</u>

0.7311*70.90

D=0.384g/l

4 0

3 years ago

Calculate the molarity of a solution prepared using 127 grams of KCI with a volume of 552 mL

den301095 [7]

Answer:

mass of 1 mole of 127 grams, KCI, 552mL = 51.1099987g

Explanation:

4 0

4 years ago

Please show all work:

Tom [10]

If 40.0 grams of magnesium is reacted with an excess of nitric acid. 3.3 g of hydrogen gas will be produced.

<h3>What is Stoichiometry ?</h3>

Stoichiometry helps us use the balanced chemical equation to measure quantitative relationships and it is to calculate the amounts of products and reactants that are given in a reaction.

<h3>What is Balanced Chemical Equation ?</h3>

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

Now we have to write the balanced equation

Mg + 2HNO₃ → Mg(NO₃)₂ + H₂

According to Stoichiometry

$40.9\ \text{g Mg} \times \frac{1\ \text{mol Mg}}{24.31\ \text{g Mg}} \times \frac{1\ \text{mol}\ H_2}{1\ \text{mol Mg}} \times \frac{2.02\ g\ H_2}{1\ \text{mol}\ H_2}$

= 3.3 g H₂

Thus from the above conclusion we can say that If 40.0 grams of magnesium is reacted with an excess of nitric acid. 3.3 g of hydrogen gas will be produced.

Learn more about the Stoichiometry here: brainly.com/question/16060223

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8 0

2 years ago

Jake hangs two balloons from a desk so that they are close together but not touching. Jake rubs one balloon with a wool cloth. H

pav-90 [236]

The objects that are rubbed together will create charges among themselves due to friction.
(1) The balloon rubbed with a wool cloth will be charged.
(2) If she comb near a small, uncharged object nothing will change.
(3) This is a scientific investigation because it does not involved a step by step process to answer a scientific query.

7 0

4 years ago

Read 2 more answers