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
larisa [96]
3 years ago
6

Which of these is an element? A. carbon B. carbon dioxide C. air D. water

Chemistry
2 answers:
Sloan [31]3 years ago
8 0
I think it's B carbon dioxide
Kaylis [27]3 years ago
4 0
Elements are pure substances. Carbon is the only one that is pure.
You might be interested in
30 points
vfiekz [6]
The molecular weight for Calcium Chloride Dihydrate (CaCl2•2H20) is 2H2O.

mass of 64g/mol = 256.52 g/mol
mass of 11g/mol = 26.981538 g/mol
mass of 147g/mol= 146.9149 g/mol
258g/mol = 258.09843 g/mol
8 0
3 years ago
Read 2 more answers
A student cleaned their glassware with tap water (known to contain chloride ions). They then attempted to make a 0.020 M solutio
Rina8888 [55]

Answer:

Ag⁺(aq) + Cl⁻(aq) → AgCl(s)

Explanation:

The silver nitrate, AgNO₃, dissolves in water as follows:

AgNO₃(aq) → Ag⁺(aq) + NO₃⁻(aq)

The Ag⁺ reacts with Cl⁻ producing AgCl(s), a white insoluble salt. The net ionic equation that describes the formation of the precipitate is:

<h3>Ag⁺(aq) + Cl⁻(aq) → AgCl(s)</h3><h3 /><h3 />
4 0
2 years ago
Calculate the pH of each solution at 25∘C
JulijaS [17]

Answer: pH of HCl =5, HNO3 = 1,

NaOH = 9, KOH = 12

Explanation:

pH = -log [H+ ]

1. 1.0 x 10^-5 M HCl

pH = - log (1.0 x 10^-5)

= 5 - log 1 = 5

2. 0.1 M HNO3

pH = - log (1.0 x 10 ^ -1)

pH = 1 - log 1 = 1

3. 1.0 x 10^-5 NaOH

pOH = - log (1.0 x 10^-5)

pOH = 5 - log 1 = 5

pH + pOH = 14

Therefore , pH = 14 - 5 = 9

4. 0.01 M KOH

pOH = - log ( 1.0 x 10^ -2)

= 2 - log 1 = 2

pH + pOH = 14

Therefore, pH = 14 - 2 = 12

8 0
3 years ago
Select all that apply:
Katyanochek1 [597]
OPTION B & C are the answers....
5 0
2 years ago
Water _____.
Sergio039 [100]

Answer: is neither an acid nor a base

Explanation: Water is a universal solvent which means it can dissolve most of the substances in it.

Water has high thermal heat capacity , which means large heat is required to heat the water.

Water is not always pure as it gets contaminated by various pollutants present in the atmosphere such as gases, bacteria and suspended matter.

Water is an amphoteric substance which can act as both acid and base, thus can donate and acept [texH^+[/tex] ions.Thus it is neither an acid nor a base.

HCl+H_2O\rightarrow H_3O^++Cl^-

Here water is accepting a proton, thus it acts as base.

NH_3+H_2O\rightarrow NH_4^++OH^-

Here water is donating a proton, thus it acts as acid.




4 0
3 years ago
Other questions:
  • Which scientist was a great influence to others when he developed the heliocentric model about how the planets orbited the Sun?
    15·1 answer
  • Help me out anybody plz
    10·2 answers
  • The limiting reactant is the chemical substance that determines the amount of product(s) that can ultimately be formed in a reac
    11·1 answer
  • The exact mechanism of this reaction is a little complicated, as it involves the copper ions. However, the process involves the
    6·1 answer
  • Hugh described two substances which participate in photosynthesis.
    9·1 answer
  • A container of gas is initially at 0.500 atm and 298 K. What will the pressure be at 398 K?
    11·1 answer
  • Why are there discontinuities in the interior of the earth...​
    14·1 answer
  • for the following reaction how many grams of h20 will be produced if you react 3.7 grams of B2H6? B2h6 +3O2-2hbo2+ 2 H20
    10·1 answer
  • On a summer day, you take a road trip through Death valley, california in an antique car.you start put at a temperature of 20*c,
    15·1 answer
  • WHAT IS PRECIPITATION REACTION​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!