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True [87]
3 years ago
15

What is always made of the same combination of elements or compounds

Chemistry
1 answer:
Colt1911 [192]3 years ago
4 0
A compound always consists of the same elements in the same ratio. If the same elements combine in different ratios, they form differents compounds. Types of compounds include covalent and ionic compounds.
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A model of an atom is shown above. The blue dots represent electrons, and the red dot represents the nucleus. This model accurat
sleet_krkn [62]
The body of an atom including its parts plus you sort of need a model to see what your dealing with and trying to answer
8 0
4 years ago
Read 2 more answers
A solution is prepared by mixing 2.88 mol of acetone with 1.45 mol of cyclohexane at 30°C. 2nd attempt Calculate the χacetone an
Volgvan
First c<span>alculate the mole fraction of each substance:
acetone: 2,88 mol </span>÷ (2,88 mol + 1,45 mol) = 0,665.
cyclohexane: 1,45 ÷ (2,88 mol + 1,45 mol) = 0,335.
Raoult's Law: 
P(total) = P(acetone) · χ(acetone)  + P(cyclohexane) · χ(cyclohexane).
P(total) = 229,5 torr · 0,665 + 97,6 torr · 0,335.
P(total) = 185,3 torr.
χ for acetone: 229,5 torr · 0,665 ÷ 185,3 torr = 0,823.
χ for cyclohexane:  97,6 torr · 0,335 ÷ 185,3 torr = 0,177.

8 0
3 years ago
In a neutralization reaction between sodium hydroxide,naoh and hydrochloric acid,hcl,the salt produced would be
natta225 [31]
NaOH + HCl ----> NaCl + H2O

3 0
3 years ago
SICL4 + H2O sio2 hcl
atroni [7]

Do you want this equation balanced?

If so, it would be

SiCl4 + 2H2O ---> SiO2 + 4HCl

5 0
3 years ago
Fluorine-18 is produced by reacting oxygen-18 with a proton, 11p. The products of this reaction are fluorine-18, a neutron, and
Tanya [424]

₈O¹⁸ + ₁¹H(proton) ⇒ ₉F¹⁸ + ₀n¹(neutron) + ₀γ⁰ (gamma)

<h3>Further explanation</h3>

Given

Fluorine-18

Oxygen-18

Required

Nuclear equation

Solution

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,  

  • alpha α particles ₂He⁴
  • beta β ₋₁e⁰ particles
  • gamma particles ₀γ⁰
  • positron particles ₁e⁰
  • neutron ₀n¹

The principle used is the sum of the atomic number and mass number before and after the decay reaction is the same

The reaction

₈O¹⁸ + ₁¹H(proton) ⇒ ₉F¹⁸ + ₀n¹(neutron) + ₀γ⁰ (gamma)

7 0
3 years ago
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