1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PilotLPTM [1.2K]
3 years ago
15

A board has a mass of 750 g. If you ground the whole board down to sawdust, what would be the mass of the pile of sawdust?

Chemistry
1 answer:
mash [69]3 years ago
4 0

The law of conservation of mass states that mass can neither be created nor destroyed. For example in an isolated system, mass of the reactants is equal to the mass of the products. Thus, mass or the quantity of the system under consideration will remain unchanged through any physical or chemical process.

In the given example, the board initially has a mass of 750 g. It is physical transformed to sawdust by grinding. Based on the conservation of mass, the pile of sawdust would still weigh 750 g.

You might be interested in
How many liters in .75 moles of methane gas at stp?
marin [14]
<span>At STP 1 mol of an ideal gas has a volume of 22.4 L. We assume (from the question) that the methane has an ideal behavior. Hence if 1 mole of an ideal gas ccupies a volume of 22.4 L Then 0.75 mole occupies X Hence X * 1 = 0.75 * 22.4 X = 16.8L</span>
6 0
3 years ago
Which soil horizon contains a layer of partially weathered or unweathered rock?
Reil [10]

Answer:

B.  R

Explanation:

A layer of partially weathered or unweathered rock is present in R soil horizon

4 0
3 years ago
Read 2 more answers
Which of the following reagents convert(s) benzoyl chloride to phenyl propyl ketone?a. CH3CH2CH2MgBrb. CH3CH2CH2Lic. (CH3CH2CH2)
Gelneren [198K]

Answer:C

(CH3CH2CH2)2CuLi

Explanation:

The reaction between acyl halides and Grignard reagents or acyl halides and organolithium compounds does not form ketones because the reagents ( Grignard reagent and organo lithium compounds) are too reactive hence the ketone intermediate reacts further to form tertiary alcohols hence the ketone cannot be isolated.

3 0
3 years ago
In an energy diagram, the reactants are at a higher potential energy compared to the products. Which of the following best descr
mrs_skeptik [129]

Answer is (D) - It is exothermic and will have a negative enthalpy.


If the reactants are at a higher potential energy compared to the products, it means reactants have more energy than the products. That energy is released to the environment as heat. Due to the releasing of heat to the surrounding, the reaction is exothermic. Since the reaction is exothermic; the enthalpy of the reaction will be negative value.


3 0
4 years ago
a calorimeter contained 75.0 g of water at 16.95 C. A 93.3-g sample of iron at 65.58 C was placed in it, giving a final temperat
Nostrana [21]

Answer:- \frac{382.69J}{0C} .

Solution:- Mass of Iron added to water is 93.3 g. Initial temperature of iron metal is 65.58 degree C and final temperature of the system is 19.68 degree C.

temperature change, \Delta T for iron metal = 65.58 - 19.68 = 45.9 degree C

specific heat for the metal is given as 0.444 J per g per degree C.

let's calculate the heat lost by iron metal using the equation:

q=mc\Delta T

where, q is the heat energy, m is mass, c is specific heat and delta T is change in temperature. let's plug in the values and calculate q for iron metal:

q=93.3g(45.9^0C)(\frac{0.444J}{g.^0C})

q = 1901.42 J

Using same equation we will calculate the heat gained by water.

mass of water is 75.0 g.

\Delta T for water = 19.68 - 16.95 = 2.73 degree C

specific heat for water is 4.184 J pr g per degree C. Let's plug in the values:

q=75.0g(\frac{4.184J}{g.^0C})(2.73^0C)

q = 856.674 J

Total heat lost by iron metal is the sum of heat gained by water and calorimeter.

So, heat gained by calorimeter = heat lost by iron metal - geat gained by water

heat gained by calorimeter = 1901.42 J - 856.674 J = 1044.746 J

Change in temperature for calrimeter is same as for water that is 2.73 degree C

For calorimeter, q=C.\Delta T

C=\frac{q}{\Delta T}

C=\frac{1044.746J}{2.73^0C}

C=\frac{382.69J}{0C}

So, the heat capacity of calorimeter is \frac{382.69J}{0C} .


4 0
3 years ago
Other questions:
  • Why certain aniamls are able to adapt to changing environment.​
    7·1 answer
  • 2 h2o ( g) 2 h2 (g) + o2 (g) kp = 7.8 × 10-16 at 930 k. give the value of kp for this reaction, if it is written as: 1/2o2 (g) +
    11·1 answer
  • Determine the molar concentration of all substances in a 1.00 L volumetric flask filled with a water solution containing 1.75 mo
    11·1 answer
  • What will most likely happen in the absence of a vacuole?
    5·1 answer
  • Please explain and rank the order of oxidation of methanol, ethanol, 2-propanol, 2-methyl-2propanol reacting with potassium perm
    7·1 answer
  • HELP!! THIS IS DUE IN AN HOUR ​!
    14·2 answers
  • What are abiotic factors HELP FAST PLEASE!!!!!!!!! FIRST ONE GIVEN BRAINLIEST AND 50 POINTS
    15·2 answers
  • Which would have the greatest evaporation: pure water or salt water?
    9·2 answers
  • If fahrenhite is 200 then what is the reading of celsius​
    13·2 answers
  • When the ph of an aqueous solution is changed from 1 to 2, the concentration of hydronium ions in the solution is.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!