Chemistry

At what minimum temperature do rocks melt into lava?A) 3,500 degrees CelsiusB) 6,332 degrees FahrenheitC) 800 degrees FahrenheitOD 800 degrees Celsius
1 Answer
an atom is the smallest unit of an element that retains the ___ of that element
1 Answer
Rocks are classified as sedimentary, metamorphic, or igneous on the basis ofthea. age of the rocks.b. way the rocks were formed.c. types of fossils the rocks contain.d. number of minerals found in the rocks.
2 Answers
To which of the three main chemical classes does Mercury (Hg) belong?a) It's not an element in the periodic tableb) Metalloidsc) Non-metalsd) Metals
2 Answers
Help! Please:( Given the following chemical equation, how many grams of water are created when 50.0 grams of oxygen react with excess hydrogen ? 2H2 + O2 - -> 2H20
1 Answer
The iodide (I2) content of a commercial mineral water was measured by two methods that produced wildly different results.6 Method A found 0.23 milligrams of I2 per liter (mg/L) and method B found 0.009 mg/L. When Mn21 was added to the water, the I2 content found by method A increased each time that more Mn21 was added, but results from method B were unchanged. Which of the Terms to Understand describes what is occurring in these measure- ments? Which result is more reliable?
2 Answers
identify NaOH (aq) + HNO3(aq) NaNO3(aq) + H2O(1)
1 Answer
Suppose astronomers are interested in obtaining an image of a largearea in the sky. Which radiation should astronomers observe if theywant to get images 24 hours a day, quickly and cheaply? Why?
1 Answer
What information in the passage helps answer the question asked previously?Gravity smooths out even the lumpiest black hole.A symmetrical collapse forms a smooth hole.Erratic gravity pulls a black hole in different directions.A collapse can be symmetrical or lopsided.Please Hurrry
2 Answers
Lithium and nitrogen react to produce lithium nitride:6Li (s) + N2 (g) = 2Li3N (s) How many moles of lithium nitride are produced when 0.400 mol lithium are used in this reaction? a. 1.28 mol b. 0.133 mol c. 0.800 mol d. 0.0667 mol
1 Answer
7. A strong acid has a pH ofA) 0B) 6C) 7D) 14
1 Answer
100 grams of liquid iron is put in liquid water when is equilibrium reached
1 Answer
If Marss atmosphere were 100% oxygen, would that make it like Earths?Yes; Earths atmosphere is mostly oxygen.Yes; the amount of oxygen in Earths atmosphere changes.No; Earths atmosphere is mostly nitrogen.No; Earths atmosphere is all carbon dioxide.
1 Answer
If more reactants are used in a chemical reaction, more products will beproduced. This is because *1 pointMore reactants have more atoms to react to form more productsMore reactants take up the same volumeToo many products can slow down the reactionMore reactants cause the reaction to heat up
1 Answer
2. I need to find the angle of corner of a room, what tool could I use?a. Combination squareb. Plumb-bobc. Sliding t-beveld. Tri-square
1 Answer
If today is Monday and it is a 1st Quarter moon, what phase will itbe on Thursday?
2 Answers
The gleaming metallic appearance of the Gateway Arch in St. Louis, Missouri, comes from the stainless steel used in its construction. This steel is made mostly of iron, but it also contains 19% (by mass) chromium and 9.0% (by mass) nickel. Stainless steel maintains its metallic sheen because the chromium and nickel in it combine with oxygen from the atmosphere, forming a layer of Cr2O3 and NiO that is too thin to detract from the luster of the steel but that protects the metal beneath from further corrosion. What is the mole ratio of chromium to nickel atoms in this steel?
1 Answer
(a)A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour. (i) What type of colour change do you observe?(ii) Identify the type of reaction.(iii) Write a word equation for the above change.
1 Answer
Which statement describes solstices?They occur when the Sun reaches its highest or lowest point in the sky.They affect the amount of sunlight in the Southern Hemisphere in May.They contribute to the cycling of winters all year long in the Northern Hemisphere.They increase the amount of rays from the Sun directly received in the Southern Hemisphere.
2 Answers
Compare the seasons on Titan to the seasons on Earth.
1 Answer
Name the type of light interaction feeling hotter in a black shirt than a white shirt1. Reflected2. Absorbed 3. Transmittied
1 Answer
Sulfuric acid is an important chemical in industrial production of many products. In the old days, it was called oil of vitriol. It is commonly dyed brown now to alert people to its hazards because it is hugely corrosive. It is commonly found in car batteries. What is the molarity of 25.9 moles of sulfuric acid dissolved in 4.00 L of solution?
1 Answer
Carbohydrates are formed by plants converting water a d carbon dioxide into glucose and oxygen, in the photocatalyzed process is called?
1 Answer
What are bacteria? Chapter 7 lesson 2 AYU
2 Answers