How would the number 8,155 be written in scientific notation?

Q: Aqueous hydrochloric acid  HCl  will react with solid sodium hydroxide  NaOH  to produce aqueous…

A: The balanced chemical equation for given reaction is as follows,

Q: how many significant figures would my answer have if i devide 94.997grams/10mL?

A: Significant figures- Uncertainty in measured value leads to uncertainty in calculated results.…

Q: A raindrop has a mass of 50. mg and the Pacific Ocean has a mass of 7.08 × 104º kg. Use this…

A: Avogadro’s number is the number of atom/molecules present in one mole of any substance. And one mole…

Q: sample of lead has a mass of 0.490. Calculate the number of moles. Your answer should be rounded to…

A: Given mass=0.49g Molar mass =207 Mole= mass/molar mass Mole=0.49/207 Mole= 0.0023

Q: Perform the following calculations and record your final answer with the correct number of…

A: The significant figure refers to particular digits in a number. According to the measurement rule,…

Q: Round off 0.007807 to three significant figures. Enter your answer in the provided box.

A:

Q: A micro-syringe holds a volume of 1.3 μL. To the proper number of significant figures, what is the…

A: pL and μL both are the units of volume. 1 μL=10-6 L1 pL=10-12 Ltherefore,1μL=106 pL

Q: None

A:

Q: 334.54 grams + 198 grams

A: The addition can be done as: 334.54+198.00 =532.54 g The value of 198 is written as 198.00, that is…

Q: Liquid hexane (CH3CH24CH3) will react with gaseous oxygen O2 to produce gaseous carbon dioxide…

A: The given reaction is,

Q: How many atoms are contained in 4.1 g of carbon? How can you round this answer to 2 significant…

A: 1 mole of any substance contains 6.023×1023 atoms.1 moles of carbon atoms weigh 12 g.

Q: 8.27x10^24 particles of hydrogen bromide weigh how much? round answer to 2 decimal places.

A: According to the question, The number of particles for the Bromide is given by  = 8.27×1024 particle…

Q: Round 0.03982 to 3 significant figures and put in scientific notation.

A: Since we know that significant figures are the digits of a number that are meaningful in terms of…

Q: 0.3210 in scientific notation.

A: Given data, 0.3210 in scientific notation

Q: A chemist must dilute 70.4 mL of 9.54 mM aqueous calcium sulfate (CaSO4) solution until the…

A:

Q: What is the mass of 1.29x10^24 particles of carbon tetrachloride ? round to 2 decimal places.

A: Given data  The number of particles of carbon tetrachloride is 1.29x1024. The mass of the sample is

Q: An unknown piece of metal weighs 526 g and has a volume of195 cm3. Identify the metal and justify…

A: Given mass=526g Volume=195cm3 Density=mass/volume Density =526/195=2.69g/cm3 This metal is aluminium

Q: What is the appropriate number of significant figures in this equation 3.5x0.251/8.02x30.0

A: To determine the appropriate number of significant figures in the result of the given equation, we…

Q: A chemist weighed out 5.3 g of iron. Calculate the number of moles of iron she weighed out. Be sure…

A: Given : weight of iron = 5.3 gram    Find : Calculated the number of moles of iron .   Formula :…

Q: Solve this equation with the appropriate significant figures. 181.34 x 1930.4582 =

A: The given equation is - - - > 181.34 x 1930.4582 = 350069.289988 =350070

Q: How do I write 42,124.50 mm3 in scientific notation?

A: Scientific notation: The expression of very big or very small numbers into a comfortable decimal…

Q: Ammonia chemically reacts with oxygen gas to produce nitric oxide and water. What mass of ammonia is…

A: Moles of oxygen can be calculated as:

Q: What is that number where it says 5.3x10^18 = ? * 7.099x10^-4

A: In this question we need to find the concentration of free Ag+ in 3.7099e-4 M AgNO3 and 1.4440 M…

Q: How many significant figures does 3.005 have?

A: Digits which are responsible for contributing the degree of accuracy of a value are called…

Q: A brick has a mass of 4.0 kg and the Earth has a mass of 6.0 × 1027 g. Use this information to…

A: Given: The mass of brick is 4.0 kg and the mass of the earth is 6.0 × 1027 g. To find: Moles of…

Q: Liquid hexane CH3CH24CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and…

A: Here, we have to calculate mass of carbon dioxide produced.

Q: Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid…

A:

Q: How many pm are there in  4.60x10 m? Enter the appropriate exponent as a number and not a word.

A:

Q: Solve the equation below for x and report the answer to the correct number of significant figures.…

A: The calculations :

Q: How many grams of calcium nitrate contain 4.50 g of oxygen? Write your answer on the blank with the…

A: Using molar mass of calcium nitrate and oxygen in calcium nitrate we can solve this problem.

Q: Calculate the mass of 8.70 × 10³ mol of Mg(NO3)2 . Round your answer to 3 significant figures.

A: The unit for mass is grams (g) and molar mass is g/mol. To get the mass, the moles have to be…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.