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3 years ago

3. What are the planets called that are mostly made of gas?

Chemistry

2 answers:

Ksju [112]3 years ago

6 0

Answer:

<h3>A gas giant is a large planet composed mostly of gases, such as hydrogen and helium, with a relatively small rocky core. The gas giants of our solar system are Jupiter, Saturn, Uranus and Neptune. These four large planets, also called jovian planets after Jupiter, reside in the outer part of the solar system past the orbits of Mars and the asteroid belt. Jupiter and Saturn are substantially larger than Uranus and Neptune, and each pair of planets has a somewhat different composition.</h3><h3 /><h3>Although there are only four large planets in our solar system, astronomers have discovered thousands outside of it, particularly using NASA's Kepler Space Telescope. These exoplanets (as they are called) are being examined to learnmore about how our solar system came to be.</h3>

Explanation:

<h2>hopeit helps...</h2>

miskamm [114]3 years ago

5 0

Explanation:

The gas planets are Jupiter, Saturn, Uranus and Neptune.

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If 8.63 grams of Aluminum oxide react with Nitric acid, how many grams of water will be produced?

Tems11 [23]

Taking into account the reaction stoichiometry, 4.57 grams of H₂O are formed when8.63 grams of Al₂O₃ reacts with HNO₃.

<h3>Reaction stoichiometry</h3>

In first place, the balanced reaction is:

Al₂O₃ + 6 HNO₃ → 2 Al(NO₃)₃ + 3 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Al₂O₃: 1 mole
HNO₃: 6 moles
Al(NO₃)₃: 2 moles
H₂O: 3 moles

The molar mass of the compounds is:

Al₂O₃: 102 g/mole
HNO₃: 63 g/mole
Al(NO₃)₃: 213 g/mole
H₂O: 18 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Al₂O₃: 1 mole ×102 g/mole= 102 grams
HNO₃: 6 moles ×63 g/mole= 378 grams
Al(NO₃)₃: 2 moles ×213 g/mole= 426 grams
H₂O: 3 moles ×18 g/mole= 54 grams

<h3>Mass of water formed</h3>

The following rule of three can be applied: if by reaction stoichiometry 102 grams of Al₂O₃ form 54 grams of H₂O, 8.63 grams of Al₂O₃ form how much mass of H₂O?

$mass H_{2} O=\frac{8.63 grams of Al_{2} O_{3} x54 grams of H_{2} O}{102 grams of Al_{2} O_{3}}$

<u><em>mass of H₂O= 4.57 grams</em></u>

Then, 4.57 grams of H₂O are formed when8.63 grams of Al₂O₃ reacts with HNO₃.

Learn more about the reaction stoichiometry:

<u>brainly.com/question/24741074</u>

<u>brainly.com/question/24653699</u>

8 0

2 years ago

A 50 mL beaker has an uncertainty of ± 10%. What is the absolute uncertainty for this beaker?

Pani-rosa [81]

Answer:

The absolute uncertainty is 10%.

Explanation:

The absolute uncertainty, sometimes referred to as absolute error, is the size of the possible range of values where by the actual or true value of a measurement probably lies.

The uncertainty of the 50 mL beaker is given as ± 10%. This implies that the volume recorded using the beaker will either be 10 % above or below the actual volume.

The absolute uncertainty ignores the direction of the error, whether above or below, and is mostly concerned with the magnitude of the error. We simply ignore the signs of the uncertainty and this will give the value of the absolute uncertainty.

5 0

3 years ago

Read 2 more answers

As the pressure of a gas increases, the ________ decreases, if the temperature is constant.

tekilochka [14]

Answer:

The volume of the gas decreases.Explanation:

3 0

2 years ago

An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation

Sauron [17]

<span>When an ice cube is placed on a kitchen counter, heat will flow from the ice cube to the counter, causing the molecules in the counter to move more slowly. The molecules of the counter move more slowly because the heat transferred to them from the ice has reduced their kinetic energy.</span>

7 0

2 years ago

Read 2 more answers

How many moles of H2O form when 4.5 moles O2 reacts?

mart [117]

Explanation:

Start with a balanced equation.

2H2 + O2 → 2H2O

Assuming that H2 is in excess, multiply the given moles H2O by the mole ratio between O2 and H2O in the balanced equation so that moles H2O cancel.

5 mol H2O × (1 mol O2/2 mol H2O) = 2.5 mol O2

Answer: 2.5 mol O2 are needed to make 5 mol H2O, assuming H2 is in excess.

4 0

2 years ago