1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
34kurt
3 years ago
12

Are we the only person in the universe?

Chemistry
1 answer:
OlgaM077 [116]3 years ago
3 0

Answer:

no..? how would we be the only person in the universe

You might be interested in
Does anyone know how to do this? the solubility of barium carbonate, BaCO3, is 0.0100 g/L. Its molar mass is 197.3 g/mol. What i
g100num [7]
It's simple, just follow my steps.

1º - in 1 L we have 0.0100~g of BaCO_3

2º - let's find the number of moles.

\eta=\frac{m}{MM}

\eta=\frac{0.0100}{197.3}

\boxed{\boxed{\eta=5.07\times10^{-5}~mol}}

3º - The concentration will be

C=5.07\times10^{-5}~mol/L

But we have this reaction

BaCO_3\rightleftharpoons Ba^{2+}+CO_3^{2-}

This concentration will be the concentration of Ba^{2+}~~and~~CO_3^{2-}

K_{sp}=\frac{[Ba^{2+}][CO_3^{2-}]}{[BaCO_3]}

considering [BaCO_3]=1~mol/L

K_{sp}=[Ba^{2+}][CO_3^{2-}]

and

[Ba^{2+}]=[CO_3^{2-}]=5.07\times10^{-5}~mol/L

We can replace it

K_{sp}=(5.07\times10^{-5})*(5.07\times10^{-5})

K_{sp}\approx25.70\times10^{-10}

Therefore the K_{sp} is:

\boxed{\boxed{\boxed{K_{sp}\approx2.57\times10^{-11}}}}
4 0
3 years ago
Read 2 more answers
What are the period and group trends in electronegativities
Leviafan [203]

Electronegativity of an element decreases as we move down a group on the periodic table and electronegativity increases while moving from left to right across a period on the periodic table.

Explanation:

  • The electronegativity increases as we move from left to right across a period because from left to right across a period, the nuclear charge is increasing Hence the attraction for the valence electrons also increases.
  • As we move down a group, the atoms of each element have an increasing number of energy levels. The distance between the nucleus and valence electron shell increases and reduces the attraction for valence electrons. Hence electronegativity decreases as we move from top to bottom down a group.
8 0
3 years ago
In the equation, 2Al (s) + 3Cl2 (g) → 2AlCl3 (s), the large number “3” in front of the Cl2 indicates:
dybincka [34]

In the equation,

2Al(s) + 3Cl2(g) —> 2AlCl3(s),

the large number "3" in front of Cl2 indicates the the number of moles of Chlorine molecules needed to balance the equation.

Hope this will help you. 

If you like my answer. Please mark it as brainliest  And  Be my follower if possible.

5 0
2 years ago
Read 2 more answers
Which element is reduced in this reaction? cr2o72−+3hno2+5h+→2cr3++3no3−+4h2o enter the chemical symbol of the element?
Ksju [112]
<span>A reducing agent loses electrons, so on the left side of the equation N in HNO2 has an oxidation number of +3 and on the right side in NO3^- it has an oxidation number of +5, so it has lost electrons. Thus, the reducing agent would be HNO2.</span>
3 0
3 years ago
The chemical which is changed into the product
seropon [69]
The chemical change can occur can be find if you mix the two solids in one direction
5 0
3 years ago
Read 2 more answers
Other questions:
  • If the reaction shown below is exothermic, the energy level of the reactants is ________. h2 + o2 → 2h2o
    9·1 answer
  • In your own words, give a summary of the history of the atom. Make sure to use names of models and the scientists associated wit
    8·2 answers
  • Would an element with 7 valence electrons be more or less reactive than an element with 3 valence electrons?
    11·1 answer
  • Balance the combustion reaction between octane and oxygen. 2C8H18 + O2 → CO2 + H2O
    12·2 answers
  • Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. a particular ore contains 68.5% gal
    9·2 answers
  • How many different types of toxins do molds make that can end up on our food and in our bodies?
    8·1 answer
  • What happen to water when it boils
    9·1 answer
  • Pl help it’s for a grade I will give you Brainly
    12·1 answer
  • Please help me with this question it’s really confusing lol. Question 21. Thank youuuu!! :))
    5·1 answer
  • Gaseous dichlorine monoxide decomposes readily to chlorine (green) and oxygen (red) gases.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!