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
UNO [17]
3 years ago
8

Which of the following are elements? O2 Ca KF B

Chemistry
2 answers:
ASHA 777 [7]3 years ago
6 0
Ca is the only element perhaps B
kow [346]3 years ago
6 0
KF, is the only non element as it's a compound.
You might be interested in
My sporty mini van needs 19,126 kJ of energy in order to pass a fast moving street sweeper on the road. Using the following equa
nika2105 [10]

Answer:

m=397.6gC_8H_{18}}

Explanation:

Hello there!

In this case, according to the given chemical reaction, we can set up the heat of reaction per mole of gasoline as shown below:

\Delta H=\frac{-10,990kJ}{2molC_8H_{18}}=-5495\frac{kJ}{molC_8H_{18}}

Now, since the total heat is obtained by multiplying the moles and heat of reaction, we can calculate the moles as shown below:

n=\frac{Q}{-\Delta H } \\\\n=\frac{19,126kJ}{-(-5495\frac{kJ}{molC_8H_{18}} )} \\\\n=3.48molC_8H_{18}}

Finally, since the molar mass of gasoline is 114.22 g/mol, we can easily calculate the mass as follows:

m=3.48molC_8H_{18}} *\frac{114.22gC_8H_{18} }{1molmolC_8H_{18}} } \\\\m=397.6gC_8H_{18}}

Best regards!

8 0
2 years ago
Identify the precipitate (insoluble substance) in the following reaction: *
borishaifa [10]

Explanation:

PbI2 is the precipitate.................

6 0
3 years ago
• If 2.5 moles of sugar are added to 2.0 L of a water/lemon juice solution, what is the molarity of the lemonade?
d1i1m1o1n [39]
The answer is 4.5 because you add rhem
6 0
3 years ago
What makes the results of a scientific experiment accurate?
Dmitriy789 [7]

Answer:

A

Explanation:

That's the best answer out of all of them.

6 0
3 years ago
Read 2 more answers
Which kind of magma produces a quiet volcanic eruption
Ilia_Sergeevich [38]
Mafic lava is low viscosity lava that creates quiet eruptions.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Tin reacts with fluorine to form two different compounds, A and B. Compound A contains 38.5 g of tin for each 12.3 g of fluorine
    14·2 answers
  • In this reaction, how does the rate of forward reaction vary with the concentration of the product? 2H2S(g) ⇌ 2H2(g) + S2(g) It
    12·2 answers
  • How is a human egg is similar to a chicken egg
    12·2 answers
  • What’s the balanced equation of sodium hydroxide + carbon dioxide produces sodium carbonate + water?
    15·1 answer
  • Two water solutions that have a density of
    13·1 answer
  • 7. The charge on the electron cloud
    10·1 answer
  • Predict the missing component in the nuclear equation.
    8·1 answer
  • If 1 is married to 2 and there kid is a 8 and and 1s dad is 6 whos kid is it
    7·1 answer
  • Did you cook the food yourself ?into passive<br>​
    8·1 answer
  • Bam added 8.91 g of CsCl to 34.29 mL of H2O. Calculate the concentration of Bam's solution in units of g solute/100 g solvent.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!