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
lukranit [14]
1 year ago
15

Scientific method practice hypothesis construction & experimental design

Chemistry
1 answer:
Gelneren [198K]1 year ago
3 0
A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation
You might be interested in
How many Neutrons are in a ^15N isotope?
Goshia [24]
There are 150 neutrons in 15N
5 0
3 years ago
Conserving water can save money while protecting the environment. True or False
blagie [28]

Answer: The given statement is true.

Explanation:

Water is a natural resource present in the nature and it is very precious as life without it is impossible.

So, when we unnecessarily use water then it means we are wasting a natural resource that cannot be reproduced again by human beings.

Therefore, more we are able to conserve water more we can protect other human life's and environment also.

If there is shortage of water then its prices will go high and hence we need to pay more for it.

Thus, we can conclude that the statement conserving water can save money while protecting the environment, is true.

3 0
3 years ago
Read 2 more answers
Nitric oxide (NO) can be formed from nitrogen, hydrogen and oxygen in two steps. In the first step, nitrogen and hydrogen react
son4ous [18]

Answer:

ΔH  = - 272 kJ

Explanation:

We are going to use the fact that Hess law allows us to calculate the enthalpy change of a reaction no matter if the reaction takes place in one step or in several steps. To do this problem we wll add two times the first step to second step as follows:

N2(g) +         3H2(g) →          2NH3(g)                 ΔH=−92.kJ  Multiplying by 2:      

2N2(g) +       6H2(g) →          4NH3(g)                        ΔH=− 184 kK

plus

4NH3(g) +     5O2(g) →          4NO(g) +6H2O(g)        ΔH=−905.kJ

__________________________________________________

2N2(g) +   6H2(g) + 5O2(g)→  4NO(g)  + 6H2O(g)      ΔH = (-184 +(-905 )) kJ

                                                                                     ΔH =    -1089 kJ

Notice how the intermediate NH3 cancels out.

As we can see this equation is for the formation of 4 mol NO, and we are asked to calculate the ΔH  for the formation  of one mol NO:

-1089 kJ/4 mol NO  x 1 mol NO =  -272 kJ (rounded to nearest kJ)

5 0
3 years ago
PLSSS HELP MEE 100 POINTS!!!!!!! How many atoms of each element does magnesium hydroxide, Mg(OH)2, contain? Magnesium = 1 atom,
Basile [38]

It would be Magnesium = 1 atom, Oxygen = 2 atoms, Hydrogen = 2 atoms. It has 5 atoms total. There is 1 magnesium and you multiply each element by the the 2 outside the parenthesis to get 2 oxygen and 2 hydrogen.

5 0
3 years ago
Read 2 more answers
Determine the pH of an HNO2 solution of each of the following concentrations:
Zepler [3.9K]

Answer:

i think that the answer is B

Explanation:

I DON

5 0
3 years ago
Other questions:
  • What is the change in enthalpy in kilojoules when 3.24 g of CH3OH is completely reacted according to the following reaction 2 CH
    7·1 answer
  • What does the sign + mean in a chemical equation?
    5·2 answers
  • A student hypothesized that the green color of plant leaves is related to exposure to sunlight and tested this hypothesis by pla
    9·2 answers
  • 15.0mL of an unknown concentration of HCl reacts completely with 20.00mL of 1.0M NaOH.determine the concentration of the acid
    12·1 answer
  • Why is thinking of a homework plan is not a form of work?
    6·1 answer
  • How can chloroform dissolve in water? Include information about molecular shape and polarity.
    8·1 answer
  • This type of thermometer relies on a liquid to contract will colder and expand when warmed. A)infrared B)thermistor
    13·1 answer
  • According to the VSEPR theory, a molecule or ion of NH₃ will have a _____ shape.
    9·2 answers
  • A substance with a ph of 9 has
    5·1 answer
  • Cell mutations within a DNA sequence are...
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!