All categories

3 years ago

5. Why are the poppy seeds placed in different places (not together)?

Chemistry

2 answers:

MAVERICK [17]3 years ago

8 0

In the atom model the poppy seeds are placed in different places to represent the different position of electrons

Mademuasel [1]3 years ago

6 0

In the atom model, the poppy seeds are placed in different places to represent the different position of electrons.

You might be interested in

Unlike carbohydrates and lipids proteins contain which element?

Harman [31]

Answer:

The answer to your question is: Nitrogen

Explanation:

Organic molecules that are part of living organisms are composed by

Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus and Sulphur.

The elements available in more quantity are Carbon, Hydrogen and Oxygen.

Nitrogen is present in proteins and nucleic acids.

4 0

4 years ago

Cubic centimeter is a unit used to measure A) mass B) area C) weight D) volume

Shalnov [3]

The answer to this is volume.

5 0

3 years ago

Read 2 more answers

If the heat of combustion of hydrogen gas (H) is –285.8 kJ , how many grams of H must combust in order to release

kifflom [539]

4.2 g of hydrogen is required to release 1.2 x 10^3 kJ of heat.

Given from the question that 1 mole of hydrogen gas contains 2 g of hydrogen gas.

We also know that heat of combustion per mole of hydrogen gas –285.8 kJ.

From the question, we are told that heat released by the reaction is -1.2 x 10^3 kJ of heat.

Hence;

If 2g of hydrogen releases –285.8 kJ of heat

x g of hydrogen releases -1.2 x 10^3 kJ of heat

x g = 2g x -1.2 x 10^3 kJ / –285.8 kJ

xg = 4.2 g of hydrogen

Learn more: brainly.com/question/1527403

7 0

3 years ago

The phase change h2(g) → h2(s) is called ________, and the enthalpy change, δh, for this phase change has a ________ sign.

Tpy6a [65]

The phase change H₂(g) → H₂(s) is called deposition, and the enthalpy change, ΔH, for this phase change has a negative (-) sign.
Deposition is a thermodynamic process in which gas transforms into solid without passing through the liquid phase. Example is formin snow in clouds directly from water vapor. In deposition energy is released.

7 0

3 years ago

When ammonia is mixed with hydrogen chloride (HCl), the white solid ammonium chloride (NH4Cl) is produced. Suppose 10.0 g ammoni

Alex_Xolod [135]

Answer:

There will remain 5.33 grams of NH3 and there will be produced 14.66 grams NH4Cl

Explanation:

Step 1: Data given

Mass of ammonia = 10.0 grams

Mass of hydrogen chloride = 10.0 grams

Molar mass of ammonia = 17.03 g/mol

Molar mass of hydrogen chloride = 36.46 g/mol

Step 2: the balanced equation

NH3 + HCl → NH4Cl

Step 3: Calculate moles NH3

Moles NH3 = mass NH3 / molar mass NH3

Moles NH3 = 10.0 grams / 17.03 g/mol

Moles NH3 = 0.587 moles

Step 4: Calculate moles HCl

Moles HCl = 10.0 grams / 36.46 g/mol

Moles HCl = 0.274 moles

Step 5: Calculate limiting reactant

For 1 mol NH3 we need 1 mol HCl to produce 1 mol NH4Cl

HCl is the limiting reactant. It will completely be consumed. (0.274 moles)

NH3 is in excess. There will remain 0.587 - 0.274 = 0.313 moles

This is: 0.313 moles * 17.03 = 5.33 grams

Step 6: Calculate moles NH4Cl

For 1 mol NH3 we need 1 mol HCl to produce 1 mol NH4Cl

For 0.274 moles HCl we need 0.274 moles NH4Cl

Step 7: Calculate mass of NH4Cl

Mass NH4Cl = moles NH4Cl * molar mass NH4Cl

Mass NH4Cl = 0.274 moles * 53.49 g/mol

Mass NH4Cl = 14.66 grams

There will remain 5.33 grams of NH3 and there will be produced 14.66 grams NH4Cl

4 0

4 years ago