Need help ASAP . Anybody ?
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Answers

Answer 1

Answer: Nitrogen cycle is the answer

Related Questions

If 62.8 g Ca react with 92.3 g HCl according to the reaction below, how many grams of hydrogen gas will be produced, and how many grams of the excess reactant will be left over?Unbalanced equation: Ca + HCl → CaCl2 + H2
The least condensed state of matter is
If atoms are made of smaller parts such as electrons, why are atoms considered the basic unit of matter?
Assume that 13.5 g solid aluminum (Al) react with HCl to produce solid aluminum chloride (AlCl3) salt and gaseous hydrogen (H2) at standard temperature and pressure.How many moles of Al react? How many moles of H2 are produced? How many liters of H2 are produced?
Of the elements fe li te u and he which are considered group b elements

An element X belongs to 4th period and 17th group. Write the formula of the compound formed when it reacts with Y( atomic no.-13, mass no.27.)

Answers

all element in group 17th have their oxidation number to be -1 and for the other element its shell configuration should be 2,8,3...therefore its oxidation number should be +3
therefore the formular should be YX3

Arrange the following elements in order of increasing atomic radius : Rb , K , Na , Li

Answers

Generally, atomic radii have this property on the periodic table: as you go down or left, the radius of an atom gets larger.

With this logic, let's apply this to the problem above. Li is on the highest part of the table compared to the other elements. Below it is Na, then K, then Rb. From our rule, we know that as we go down on the table, the atomic radius gets larger.

Thus, Li has the smallest radius, and Rb has the largest radius.

FINAL ANSWER: Li, Na, K, Rb

Final answer:

The order of increasing atomic radius for the elements Li, Na, K, and Rb is Li

Explanation:

The arrangement of the following elements in increasing atomic radius: Li, Na, K, and Rb indicates that the atomic radius increases as we move down a group in the periodic table. This group of elements, Li, Na, K, and Rb, are all alkali metals and exhibit similar chemical behaviors. As the atomic number or Z increases, the atomic radius also increases. For example, Lithium (Li) has an atomic number of 3, Sodium (Na) 11, Potassium (K) 19, and Rubidium (Rb) 37. As we move down the group from Li to Rb, both Z and the atomic radius increase.

Learn more about Atomic Radius here:

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How many liters of oxygen at stp are needed to react with 5.2 * 10 to the 22nd power molecules of hydrogen sulfide?

Answers

For the reaction H2S + 2 O2 -> H2SO4

starting with 5.2 x 10^22 molecules of H2S we can calculate the number of moles H2S by dividing by 6.02 x 10^23

We have 0.086 moles H2S

1 mole of H2S reacts with 2 moles of O2 so we need 0.17 moles of O2

1 mole of all gases at stp occupy 22.4 liters of space

.17 x 22.4 = 3.08 liters of O2 needed to react with 5.2 x 10^22 molecules of H2S

NASA communicates with the Space Shuttle and International Space Station using Ku-band microwave radio. Suppose NASA transmits a microwave signal to the Space Shuttle using radio waves with a frequency of 18GHz . Calculate the wavelength of these radio waves.

Answers

Answer:

λ = 0.0167 m = 16.7 mm

Explanation:

The wavelength of these radio waves can be found out by using the formula for the speed of radio waves:

v = fλ

where,

v = speed of radio waves = speed of light = 3 x 10⁸ m/s

f = frequency of radio waves = 18 GHz = 18 x 10⁹ Hz

λ = Wavelength = ?

Therefore,

3 x 10⁸ m/s = (18 x 10⁹ Hz)λ

λ = (3 x 10⁸ m/s)/(18 x 10⁹ Hz)

λ = 0.0167 m = 16.7 mm

Which of the following statements are correct about the chemical reaction?H2 + O2 -> H2O2
versus
2 H2 + O2 -> 2 H2O?
They are both balanced chemical equations.
The two reactions are equivalent.
The laws of thermodynamics apply to both.
Conservation of mass applies to both.

Answers

The correct answer for the question that is being presented above is this one: "They are both balanced chemical equations." The statement that is correct about the chemical reaction is that both chemical reaction are balanced chemical equations.

Adding hydrogen atoms to an unsaturated fatty acid will make it __________.a. more solid
b. have better 6 benefits in relationship to heart disease
c. increase its flavor
d. create a fatty acid

Answers

The answer is (a.) more solid

Adding hydrogen atoms to an unsaturated fatty acid will make it more solid. This process is called hydrogenation. In this process, hydrogen is added to an unsaturated fatty acid to make it more saturated and thereby more solid at a room temperature.

Adding hydrogen atoms to an unsaturated fatty acid will make it more solid.

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Which of the following is the SI unit used to measure mass?

Based on atomicity , how molecules are categorized

Compute 4.659×104−2.14×104. Round the answer appropriately.

Under which conditions of temperature and pressure would a sample of H2(g) behave most like an ideal gas?(1) 0°C and 100 kPa(2) 0°C and 300 kPa(3) 150°C and 100 kPa(4) 150°C and 300 kPa