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stellarik [79]
2 years ago
5

if the observed test value of a hypothesis test is outside of the established critical value(s), a researcher would __________.

claim significant support for the hypothesis claim no significant support for the hypothesis restate the hypothesis more clearly repeat the experiment until support is found
Chemistry
2 answers:
romanna [79]2 years ago
8 0

Answer:

The correct answer is a

Explanation:

Makovka662 [10]2 years ago
6 0
The answer to this question is:

<span>If the observed test value of a hypothesis test is outside of the established critical value(s), a researcher would __________.
</span><span>"Claim significant support for the hypothesis"

Hoped This Helped, </span><span> Itsalishamariee
Your Welcome :)</span>
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Suppose you have a 2.0 molar solution of sodium hydroxide (naoh), and you need 65 ml of 0.6 molar naoh. how should you make this
nalin [4]

The given molarity of sodium hydroxide solution = 2.0 M

The required concentration of sodium hydroxide is 65 mL of 0.6 M NaOH

Converting 65 mL to L:

65mL*\frac{1L}{1000mL} =0.065L

Calculating the moles of NaOH in the final solution:

0.065L * \frac{0.6 mol}{L} =0.039mol

Finding out the volume of 2.0 M solution taken to prepare the final solution:

0.039 mol * \frac{1L}{2.0mol}=0.0195L*\frac{1000mL}{1L} =19.5mL

Therefore, 19.5 mL of 2.0 M NaOH solution and make it up to 65 mL to prepare 0.6 M NaOH solution.


3 0
2 years ago
White wash suspension, a saturated solution of ca(oh)2, has a ph of 12.37. what is ksp for ca(oh)2?
SSSSS [86.1K]

Find the pOH from pH

pH + pOH =14\\pOH= 14-pH = 14-12.37 = 1.63

The KSP value of ca(oh)^{2} is

ca(oh)^{2} -- > ca^{2} + (aq) +2OH^{-}    \\ksp = 4s^{3}

The value finally becomes,

ksp = 5.15 * x=10^{-5}

<h3>What are the properties of Saturated solution ?</h3>

A saturated solution is one that contains all of the solute that can possibly dissolve in it. The most sodium chloride that may dissolve in 100 g of water at 20°C is 36.0 g. Past that point, adding more NaCl won't cause it to dissolve because the solution is already saturated.

The solution reaches a point when it is saturated. This indicates that if you add more of the substance, it will stop dissolving and instead stay solid. The amount depends on how the solvent and solute interact molecularly.

To learn more about saturated solution, visit

brainly.com/question/9414660

#SPJ4

5 0
1 year ago
Predict whether the equilibria
IceJOKER [234]

Answer:

The correct answer is option 4.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

For exothermic reaction :ΔH = negative

  • If the temperature is increased, so according to the Le-Chatlier's principle , the equilibrium will shift in the direction where decrease in temperature occurs.So, equilibrium will move in backward direction.
  • If the temperature is decreased , so according to the Le-Chatlier's principle , the equilibrium will shift in the direction where increase in temperature occurs.So, equilibrium will move in forward direction.

For the given equation:

I) CO_2(g) + 2 NH_3(g) \leftrightharpoons CO(NH_2)_2(s) + H_2O(g) ,ΔH° = -90 kJ

On Increasing the temperature

This is an exothermic reaction, backward reaction will decrease the temperature. Hence, the equilibrium will shift in the left direction that is towards reactants.

II) Ni(s) + 4 CO(g)\leftrightharpoons Ni(CO)4(g) ,ΔH° = -161 kJ

On Increasing the temperature

This is an exothermic reaction, backward reaction will decrease the temperature. Hence, the equilibrium will shift in the left direction that is towards reactants.

3 0
3 years ago
Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays
Varvara68 [4.7K]

Answer:

\boxed{_{84}^{210}\text{Po} \longrightarrow \, _{82}^{206}\text{Pb} + \,_{2}^{4}\text{He}}

Explanation:

The unbalanced nuclear equation is

_{84}^{210}\text{Po} \longrightarrow \, ? + \,_{2}^{4}\text{He}

It is convenient to replace the question mark by an atomic symbol, _{x}^{y}\text{Z}, where x = the atomic number, y = the mass number, and Z = the symbol of the element .

Then your equation becomes

_{84}^{210}\text{Po} \longrightarrow \, _{x}^{y}\text{Z} + \,_{2}^{4}\text{He}

The main point to remember in balancing nuclear equations is that **the sums of the superscripts and the subscripts must be the same on each side of the equation**.  

Then

84 = x + 2, so x = 84 - 2 = 82

210 = y + 4, so y = 206

Element 82 is lead, so the nuclear equation becomes

\boxed{_{84}^{210}\text{Po} \longrightarrow \, _{82}^{206}\text{Pb} + \,_{2}^{4}\text{He}}

4 0
3 years ago
Explain why metallic elements bend, while solid and non-metallic elements break or crumble?
larisa [96]
Metallic elements can be manipulated and bent because the have the ability to slightly stretch, other materials such as plastic are unable to bend and stretch even under high tempuratures
8 0
3 years ago
Read 2 more answers
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