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
Ann [662]
3 years ago
7

A/an _______ is a type of research that involves observation and collecting data but does not include a control. A. independent

variable B. experimentation C. dependent variable D. investigation
Chemistry
1 answer:
pantera1 [17]3 years ago
8 0
Should be D. an investigation
You might be interested in
What is the atomic number of the yet-undiscovered element directly below francium ( Fr) in the periodic table?
kakasveta [241]
The atomic number of Francium is 87.
4 0
3 years ago
Physical science!!! please help
IgorLugansk [536]

Answer:

The correct answer is : No, because there are 4 hydrogen atoms on the reactants side and 2 on the products side.

Explanation:

NH_4NO_3\rightarrow N_2O+H_2O

The given reaction equation is not balanced because:

  • Number of hydrogen atoms  on both sides are not equal that is 4 on reactants side and 2 on products side.
  • Number of oxygen atoms on both sides are not equal that is 3 on reactants side and 2 on products side.

In a balanced chemical equation number of atoms of each elements are equal on both sides.

So, the balanced chemical equation will be:

NH_4NO_3\rightarrow N_2O+2H_2O

7 0
3 years ago
What was the original element formed moments after the Big Bang? What then created higher order elements?
Semmy [17]
Hydrogen (H) was first, followed by helium (He).
6 0
2 years ago
How many milliliters of 0.0896M LiOH are required to titrate 25.0 mL of 0.0759M HBr to the equivalence point?
slavikrds [6]

Answer:

V_{LiOH}=21.8mL

Explanation:

Hello,

In this case, during titration at the equivalence point, we find that the moles of the base equals the moles of the acid:

n_{LiOH}=n_{HBr}

That it terms of molarities and volumes we have:

M_{LiOH}V_{LiOH}=M_{HBr}V_{HBr}

Next, solving for the volume of lithium hydroxide we obtain:

V_{LiOH}=\frac{M_{HBr}V_{HBr}}{M_{LiOH}} =\frac{0.0759M*25.0mL}{0.0896M} \\\\V_{LiOH}=21.8mL

Best regards.

8 0
2 years ago
Freon, a very useful refrigerant, is produced in the following reaction:
Svetach [21]

Answer:

The chemistry will need 2*10⁶ moles of antimony trifluoride.

Explanation:

The balanced reaction is:

3 CCl₄ (g) + 2 SbF₃ (s) → 3 CCl₂F₂(g) + 2 SbCl₃ (s)

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

  • CCl₄: 3 moles  
  • SbF₃: 2 moles
  • CCl₂F₂: 3 moles
  • SbCl₃: 2 moles

You can apply the following rule of three: if by reaction stoichiometry 3 moles of freon are produced by 2 moles of antimony trifluoride, 3*10⁶ moles of Freon are produced from how many moles of antimony trifluoride?

moles of antimony trifluoride=\frac{3*10^{6}  moles of freon*2 moles of antimony trifluoride}{3 moles of freon}

moles of antimony trifluoride= 2*10⁶

<u><em>The chemistry will need 2*10⁶ moles of antimony trifluoride.</em></u>

8 0
3 years ago
Other questions:
  • Take a few minutes to look at pictures of humans and humpback whales. You can look for the images on the Internet or look throug
    14·1 answer
  • What is the name of the compound with the chemical formula (NH4)2S?
    5·1 answer
  • Vinegar is a dilute solution ethanoic acid in water (see the question above for the structure of ethanoic acid). In order to tes
    15·1 answer
  • **PLATO QUESTION, PLEASE ANSWER CORRECTLY, THANKS SO MUCH**
    9·2 answers
  • Which is most affected by a tropical warm air mass?
    13·2 answers
  • Give the electron confiuration of Chromium (Cr), atomic number 24.
    14·2 answers
  • The ion that has the same e- arrangement as Ar:
    11·2 answers
  • From the following data, calculate the average bond enthalpy for the NOH bond: NH3(g) ¡NH2(g) 1 H(g) ¢H° 5 435 kJ/mol NH2(g) ¡NH
    7·1 answer
  • Kendrick goes to his neighborhood gym to exercise. The process of cellular respiration makes it possible for him to run on the t
    5·2 answers
  • Which situation would cause a red for an observer on the red planet?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!