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
Scorpion4ik [409]
3 years ago
11

A new garage door opener app is introduced to the market, claming it can close your garage door from a farther distance than a t

raditional door opener. 10 volunteers are given access to the app, and their neighbors are using the traditional opener. The number of times the garage door opens is detremined from varying distance. What is the control group, Independent variable, and the dependent variable?
Chemistry
1 answer:
Semmy [17]3 years ago
8 0

Answer:

I would answer but not enough information

You might be interested in
What does I stand for?
tatuchka [14]
I: Current
V: Voltage
R: resistance
you’re welcome ;)
7 0
3 years ago
Read 2 more answers
26.8 moles of argon contain how many atoms?
Maru [420]
<span>1.61 × 1023 Multiply by 26.8 to get the answer.161.33 x 10 ^23   </span>
4 0
3 years ago
Read 2 more answers
How does the A Hreaction relate to the A He of molecules involved in a reaction?
igor_vitrenko [27]

Answer:

B. ΔHreaction = ΔH°f reactants- ΔH°f products

Explanation:

<em>Using Hess's law, it is possible to sum ΔH of several related reactions to find ΔH of a particular reaction</em>.

Having in mind Hess's law, ΔH°f is defined as the change in enthalpy during the formation of 1 mole of substance from its constituent elements (That is, pure elements, mono or diatomics, that have a ΔH° = 0).

For example, in ΔH°f of H₂O, the equation is:

H₂(g) + 1/2O₂(g) → H₂O(g)

The constituent elements with ΔH°f = 0 are H₂(g) and O₂(g).

Now, using Hess's law, you can sum the ΔH°f of substance in a reaction as, for example:

NaOH + HCl → H₂O + NaCl. ΔHr

The ΔH°f for each substance in the reaction is:

NaOH: Na + 1/2H₂ + 1/2O₂ → NaOH <em>(1)</em>

HCl: 1/2H₂ + 1/2Cl₂ → HCl <em>(2)</em>

H₂O: H₂ + 1/2O₂ → H₂O <em>(3)</em>

NaCl: Na + 1/2Cl₂ → NaCl <em>(4)</em>

The algebraic sum of (3) + (4) is -(ΔH°f reactants):

H₂ + 1/2O₂ + Na + 1/2Cl₂ → NaCl + H₂O ΔH°f reactants

This reaction - {(1)+(2)} ΔH°f products

NaOH + HCl → H₂O + NaCl.

ΔHr = ΔH°f reactants- ΔH°f products

In the example, we obtain this relationship that can be expanded for all reactions. Thus, right answer is:

<h3>B. ΔHreaction = ΔH°f reactants- ΔH°f products</h3>

8 0
3 years ago
Why do you have to have a certain number of reactants on one side?
Debora [2.8K]

Answer:

EWQEQW

Explanation:

WEQWE

3 0
3 years ago
Type the correct answer in each box. Spell all words correctly.
Dmitry_Shevchenko [17]
There’s nothing there?
8 0
3 years ago
Other questions:
  • Round to four significant figures 0.00238866
    13·1 answer
  • What is the mass of oxygen in 10.0 grams of water
    7·2 answers
  • Which statement best describes the process of nuclear fusion?
    13·1 answer
  • What is the reason for attainment of equilibrium?
    7·1 answer
  • Joe’s cells can’t convert food energy effectively into energy they can use. As a result, he gets extremely tired, has weak legs,
    13·2 answers
  • Which of the following is true for a nuclear reaction? Electrons are lost Electrons are gained Identity of element changes Ident
    9·2 answers
  • Which of the following chemicals effects blood pressure for both the short and long term?
    9·1 answer
  • The end point in a titration of a 43ml sample of aqueous lactic acid was reached by addition of 16mlof0.22MKOH titrant. One mole
    9·1 answer
  • Explain why seeing a gas doesn not always indicate that there was a chemical change. ​
    7·1 answer
  • What would the chemical formula be of a compound that has Hydrogen and Carbon in it?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!