Chemistry

COROName three ways that scientists can ensure their resultsare reliable
1 Answer
Which of these conclusions is correct about P and Q in the diagram? P represents the land and Q represents the ocean. P represents the ocean and Q represents the land. P represents the land and Q represents the atmosphere. P represents the atmosphere and Q represents the ocean.
2 Answers
How much of this reactant should he order to makesure he runs out of both reactants at the sametime? Round to the nearest hundredth and do notround any of your work until the very end.g of the limitingHe should uderreactant.
2 Answers
A typical cell phone uses wavelength of 0.36meters. How much energy does this wave have?
1 Answer
What chemicals would be needed to create a mint that actually cleaned teeth while offering flavors and consumable chemicals? I'd like multiple responses.
1 Answer
Answer the questions using the drop-down menus.Which is the independent variable in this experiment?Which is the dependent variable in this experiment?Which is a controlled variable in this experiment?
2 Answers
The Sun is a constant supply of energy to Earth.A. TrueB. False
1 Answer
Ideal StoichiometryBarium oxide has a replacement reaction with lithium. Calculate the mass of Barium oxide needed to react with 34.67 g of lithium.*equation needed and thorough explanation please*A- 340.5B- 383.0C- 455.0D- 256.8
1 Answer
Which of these would be an appropriate way to describe the concentration of orange candies? Check all that apply the number of orange candies divided by total number of candies the mass of orange candies divided by total mass of candies the volume of brown candies divided by volume of orange candies the actual number of orange candies the number of orange candies divided by number of brown candies the number of orange candies plus number of brown candies
2 Answers
How are ecosystem biodiversity and species extinction related?
1 Answer
What is the pH of a 0.083 solution of HCI
1 Answer
Which substance should a student apply to the skin if he or she gets splashed with an acid?
1 Answer
What is one thing NOT impacted by AcidRain.A)GraniteB)MetalC)Limestone
1 Answer
What does the questions how much? and how many? have in common?
1 Answer
Why is a chemical equilibrium described as dynamic?
1 Answer
How many atoms of carbon are present in 1.5 mole of carbon.
1 Answer
does the reaction Fe + CuNO3 occur
1 Answer
How many molesare equal to4.11x1023molecules ofCO2?
2 Answers
Leon made a study chart about human-induced changes tothe environment.Which headings best complete the chart?Environmental Changes Caused by HumansX: Habitat DestructionY: PollutionYResults fromintroducing harmfulsubstances into theResults from natural areasbeing cleared and replacedby human development X: Long-Term ChangesY: Short-Term ChangesX: Short-Term ChangesY: Long-Term Changes0 X: PollutionY: Habitat DestructionenvironmentExample: deforestationExample: oil spill
2 Answers
List three facts or accomplishments of Modern India (India today)
2 Answers
1. Calculate the molarity of 35g of calcium chloride (CaCl2) that is dissolved in 850ml of water. (Calculate moles first)a. 0.27Mb. 0.38Mc. 0.32Md. 0.80M2. Calculate the molarity of 90g of copper sulfate (CuSO4) when dissolved in 5 L of water.a. 0.112Mb. 2.8Mc. 0.56Md. 0.50M3. What is the molarity of NaOH if 0.70 moles are dissolved in 250 ml of water?a. 175,000Mb. 2.8Mc. 0.175Md. 4M4. How many moles of Lithium oxide (Li20) are in 2 L of solution with a molarity of 2.0M?a. 1 moleb. 2 molesc. 0.2 molesd. 4 moles5. How many moles of NaCl are in 7.5 L of 0.5M?a. 3.75 molesb. 15 molesc. 0.066 molesd. 2.5 moles
1 Answer
The glass of a lit 75-watt incandescent bulb is hotter to the touch than the glass of a 25-watt compact fluorescent (CFL) bulb that emits the same amount of light. What could be a reason for this
1 Answer
At constant pressure, what generally happens to the solubility of solids and gases when the temperature of a solution is increased?A.The solubility of solids and gases increases.B.The solubility of solids and gases decreases.C.The solubility of solids increases, and the solubility of gases decreases.D.The solubility of solids decreases, and the solubility of gases increases.
2 Answers
what was the role of the lung model in this scenario
2 Answers