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DochEvi [55]
3 years ago
11

People have developed models of the universe for thousands of years. Identify two observations that a model of the universe woul

d need to explain in order to be useful
Chemistry
1 answer:
ella [17]3 years ago
4 0
It It would both need to show and explaine the universe
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LOTS OF POINT PLS HELP!!!! What is the balanced, net ionic equation for the reaction shown below? HCI (aq) + NaOH (ag)-> NaCI
Kruka [31]

The net ionic equation is written as H^+(aq) + OH^-(aq) -------> H2O(l)

<h3>What is the net ionic equation?</h3>

The term net ionic equation refers to the equation that shows the ions that underwent a change in the reaction. We have to note that the reaction species here must be ionic species which are able to dissociate into ions in solutions.

Now the first step is to put down the molecular equation. The molecular equation shows the reaction of the compounds as follows;

HCI (aq) + NaOH (ag)-> NaCI (aq) +H2O(l)

Next, we put own the complete ionic reaction equation as follows;

H^+(aq) + Cl^-(aq) + Na^+(aq) + OH^-(aq) -------> Na^+(aq) + + Cl^-(aq) + H2O(l)

Next we have the net ionic equation;

H^+(aq) + OH^-(aq) -------> H2O(l)

Learn more about ionic reaction equation:brainly.com/question/21368817

#SPJ1

4 0
2 years ago
Which of these compounds is most likely to be ionic? select one:
Vlada [557]
The compound that is most likely to be ionic is BaCl2
Ionic compounds are compounds made up of ions. These ions are atoms that gain or lose electrons, giving them a net positive or negative charge. Metals tend to lose electrons, thus they become cations and have a net positive charge. Non metals tend to gain electrons, forming anions that have a net negative charge. 
5 0
3 years ago
How many moles are present 560.0 g of iron (lll) sulfate
xxMikexx [17]

Answer:

1.400 mol

Explanation:

To convert grams to moles, you will need the molar mass.  The molar mass of iron(iii) sulfate is 399.88 g/mol.  Divide grams by the molar mass to find moles.

(560.0 g)/(399.88 g/mol) = 1.400 mol

There are 1.400 mol present in 560.0 g of iron(iii) sulfate.

3 0
4 years ago
Methane and oxygen react to form carbon dioxide and water. what mass of water is formed if 3.2 g of methane react with 12.8 g of
inn [45]
<span>7.2 g of water.
       
This is a simple matter of adding up the masses of the initial reactants and determining the mass of the results. You started with 3.2 g of methane and 12.8 g of oxygen. So the total mass you start with is 3.2 + 12.8 = 16.0 grams. The reaction results in water and carbon dioxide. The mass of the carbon dioxide is 8.8 g, so the mass of the water will be 16.0 - 8.8 = 7.2 g.</span>
8 0
3 years ago
Ill upvote please help
NARA [144]
Hello there.

<span>Find the average acceleration of a northbound subway train that slows from 12 m/s to 9.6 m/s in 0.9 s

</span><span>2.7 m/s2
</span>
3 0
4 years ago
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