3. A tea kettle holds about
of water.
2 mL
200 mL
2L
200 L
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Related Questions
Which of the following is the correct definition of convection?A. the transfer of heat by currents B. the transmission of heat across matter C. the electromagnetic radiation from the surface of an object which is due to the object's temperature D. the transmission of heat across empty space
Wegner's theory that the continents slowly moved over Earth's surface became known as _________ .
Name and Title:Include your name, instructor's name, date, and name of lab.Objectives(s):In your own words, what is the purpose of this lab?Hypothesis:In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.Procedure:The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.Data:Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.Hydrogen Helium Lithium Sodium Carbon NitrogenMoon One Moon Two Planet One Planet Two Conclusion:Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.Using two to three sentences, summarize what you investigated and observed in this lab.Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars? Why might it be useful to determine the elements that a planet or moon is made up of?
Sodium inside a star is most likely formed by which process?fusionbeta emissionalpha emissionfission
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This relates to natural selection because certain finches with say a smaller shorter beak would be able to eat only smaller seeds and fruits as to where a finch with a longer larger beak could eat larger bigger seeds and fruits.
Hope this helped! Have a great day!
B. SiCl4
C. NaCl
D. Na2O
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The compound of an element in period 3 that reacts with water to form a solution with a pH greater than 7 is:
D. Na₂O (sodium oxide)
In period 3 of the periodic table, the elements are sodium (Na) and silicon (Si), among others. Let's analyze the options:
A. SiO₂ (silicon dioxide) does not react with water to form a solution with a pH greater than 7. It is an acidic oxide and can react with water to form a weakly acidic solution.
B. SiCl₄ (silicon tetrachloride) is not a compound that reacts with water to form a solution with a pH greater than 7. It hydrolyzes with water to produce hydrochloric acid, which leads to a decrease in pH (more acidic).
C. NaCl (sodium chloride) does not react with water to form a solution with a pH greater than 7. It is a neutral compound and does not affect the pH of water.
D. Na₂O (sodium oxide) reacts vigorously with water to form sodium hydroxide (NaOH), a strong base. Sodium hydroxide is highly soluble in water and completely dissociates into hydroxide ions (OH⁻) and sodium ions (Na⁺). The presence of hydroxide ions in the solution makes it basic, resulting in a pH greater than 7.
Therefore, the correct answer is D. Na₂O (sodium oxide).
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Nasub(2)O + H2O --> 2 NaOH
Nasub(2)O solution has pH much higher than 7
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Answer:
The main basis for the classification system is the way rocks were formed. With these criteria there are three different types of rocks:
- Igneous rocks : formed through the cooling and solidification of magma or lava
- Sedimentary rocks : formed by the accumulation or deposition of small particles
- Metamorphic rocks: formed by the transformation of existing rock types by heating and pressure
2. shape of the rock
3. how the rock is formed
4. who discovered the rock
that is it
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(AHC H20(I) = -285.8 kJ/mol)
A -120.9 kJ
B-241.8 kJ
C-571.6 kJ
D-285.8 kJ
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Answer:
The heat of reaction when hydrogen and oxygen combine to form water is :
C. 571.6 kJ
Explanation:
Enthalpy Change = The enthalpy change for the formation of 1 mole of the substance from their standard state is called the enthalpy of formation.
This is intensive quantity as it is fixed for 1 mole .
Intensive properties = Those properties which are independent on the amount of the substance are intensive properties.
The value of these quantities does not get halve if you divide the substance into two equal parts. example , density, refractive index.
However , the enthalpy of reaction is extensive. Because on increasing the amount the value of the enthalpy also get doubles
Hence for this reaction :
Its value is -285.8 kJ for 1 mole
And here two moles are present . so the value of molar enthalpy is:
-285.8 x 2 = -571.6 kJ