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
Rashid [163]
3 years ago
9

Is concrete a compound element or mixture?

Chemistry
1 answer:
alisha [4.7K]3 years ago
5 0
Concrete is a mixture. 
You might be interested in
Zoom in if need to<br> PLEASE HELP DUE TOMARROW
padilas [110]
The best way to do this is to google search each question, or look it up on quizlet.com
5 0
3 years ago
At the end of the reaction you washed the chemicals into a beaker using water. Why was it OK to use water to do this if Grignard
lesya692 [45]

Answer: water could be used to wash it since the reaction has ended.

Explanation:

There will be no reaction of water with the Grignard reagent since the reaction has ended, as it is well known that water is a universal solvent for washing of glasswares after experiments but if it is during the reaction it will be more advisable to rinse with alcohol to enhance more accuracy during the experiment

7 0
3 years ago
What is true of a gas
velikii [3]

Answer:

did you have options, cause if you did chose something alond the lines of

Explanation:

A real gas is a gas that does not behave as an ideal gas due to interactions between gas molecules. A real gas is also known as a nonideal gas because the behavior of a real gas in only approximated by the ideal gas law.

3 0
3 years ago
Solve the following problem and round the correct number of significant
RUDIKE [14]

Answer:

4.5 + 2.34 = 6.8

Sig Figs:

2

Decimals:

1

Scientific Notation:

6.8 × 10ⁿ

Words:

six point eight

5 0
3 years ago
Catalyst
Hoochie [10]

a. volume of NO : 41.785 L

b. mass of H2O : 18 g

c. volume of O2 : 9.52 L

<h3>Further explanation</h3>

Given

Reaction

4 NH₃ (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (l)

Required

a. volume of NO

b. mass of H2O

c. volume of O2

Solution

Assume reactants at STP(0 C, 1 atm)

Products at 1000 C (1273 K)and 1 atm

a. mol ratio NO : O2 from equation : 4 : 5, so mo NO :

\tt \dfrac{4}{5}\times 0.5=0.4

volume NO at 1273 K and 1 atm

\tt V=\dfrac{nRT}{P}=\dfrac{0.4\times 0.08206\times 1273}{1}=41.785~L

b. 15 L NH3 at STP ( 1mol = 22.4 L)

\tt \dfrac{15}{22.4}=0.67~mol

mol ratio NH3 : H2O from equation : 4 : 6, so mol H2O :

\tt \dfrac{6}{4}\times 0.67=1

mass H2O(MW = 18 g/mol) :

\tt mass=mol\times MW=1\times 18=18~g

c. mol NO at 1273 K and 1 atm :

\tt n=\dfrac{PV}{RT}=\dfrac{1\times 35.5}{0.08206\times 1273}=0.34

mol ratio of NO : O2 = 4 : 5, so mol O2 :

\tt \dfrac{5}{4}\times 0.34=0.425

Volume O2 at STP :

\tt 0.425\times 22.4=9.52~L

5 0
3 years ago
Other questions:
  • Lab: Magnetic and Electric Fields Step 3: Determine the Polarity of Magnets
    7·1 answer
  • Use the accepted values for the molar masses of zinc and gold to determine the mass of gold needed to have the same number of at
    12·1 answer
  • Quantum numbers arise naturally from the mathematics used to describe the possible states of an electron in an atom. The four qu
    11·1 answer
  • What is true of greenhouse gases​
    15·1 answer
  • Nucleosynthesis began when _____ and ended when _____
    9·1 answer
  • Number of H in 3(NH4)2Cro4
    9·1 answer
  • Make the following conversion.<br> 954 g= _ kg<br> 0954000<br> 95400<br> 0.954<br> 0.0954
    7·1 answer
  • How many significant figures does the number have?<br> 9,000, 100
    11·2 answers
  • Which of the following could fom an ionic bond with an anion?
    9·1 answer
  • What medal has the highest volume?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!