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3 years ago

Approximately how old is the Sun?

Chemistry

2 answers:

malfutka [58]3 years ago

5 0

The answer is C. 4.6 billion years. Hoped I helped. :)

kupik [55]3 years ago

3 0

The sun is 4.6 billion years!!..!

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Indique cuáles son las unidades de la molaridad * eq-g/m³ eq-g/L mol/cm³ mol/L

Westkost [7]

Answer:

Explanation:

3 0

3 years ago

When designing an engineering solution, certain criteria and constraints must be considered. Criteria are the features of the de

kondor19780726 [428]

Answer:

The criteria listed in order of importance are;

1) To be inflated in the event of a collision in order to protect the occupants of the front of the vehicle

2) To be able to withstand the load of the breaking force of the occupants in the front seat of the vehicle during a collision

3) To be relatively tough so as to resist being torn on impact with a sharp object

The constraints listed in order of importance are;

1) How is the model design able to sense a collision that requires the airbag to be inflated

2) The uncertainty of the load the airbag will withstand upon collision

3) The possible hazard that could be caused by the gas used to inflate the airbag

4) The usage/interaction tendency between the vehicle occupant and the airbag system

Explanation:

In order to produce an effective design, it is important to be able to foresee the possible deficiencies of an idea so as to be able to mitigate the problems before an actual incident happens.

5 0

4 years ago

2.5 moles of oxygen react with 3.5 moles of hydrogen according to the following balance equation: 2H2 + 1 O2 —> 2 H2O. What i

mash [69]

Answer:

limiting reactant started with/limiting reactant needed=

= 3.5 mol/3.5 mol=1:1

Explanation:

2H2 + 1 O2 ---> 2 H2O

from reaction 2 mol 1 mol

given 3.5 mol 2.5 mol

needed 3.5 mol 1.75 mol

Excess reactant O2, Limiting reactant H2.

Limiting reactant will be used completely.

So, limiting reactant started with/limiting reactant needed=

= 3.5 mol/3.5 mol=1:1

3 0

3 years ago

During freezing, a substance? -loses chemical energy -loses thermal energy -gains thermal energy -gains chemical energy

Sauron [17]

The process of melting a crystalline solid can be

reversed if the liquid is cooled. The change from the liquid state

to the solid state is called freezing. As the liquid cools, it loses 

thermal energy. As a result, its particles slow down and come

closer together. Attractive forces begin to trap particles and the

crystals of a solid begin to form.

"The total kinetic energy of all the particles in a sample of

matter is called thermal energy. Thermal energy, an extensive

property, depends on the number of particles in a substance as

well as the amount of energy each particle has. If either the

number of particles or the amount of energy in each particle

changes, the thermal energy of the sample changes. With identically sized

samples, the warmer substance has a greater thermal energy."

7 0

4 years ago

Gaseous water molecules condense when they _______. Liquid water molecules evaporate when they _______.

ruslelena [56]

Answer : Gaseous water molecules condense when they cooled. Liquid water molecules evaporate when they heated.

Explanation :

Condensation : It is a process in which a phase changes from gaseous state to liquid state. This process occurs when the water molecules in the air cool down and they join together to form liquid water.

Evaporation : It is a process in which a phase changes from liquid state to gaseous state. This process occurs when the water is heated, the molecules in the water move and vibrate quickly that they escape into the atmosphere as water vapor.

3 0

4 years ago