CHEMISTRY HIGH SCHOOL

Absolute proof about the origin of a crater on the moon or the "star of Bethlehem" cannot be determinedusing the scientific method.
True
False

Answers

Answer 1
Answer:

Correct Answer: TRUE

The other answer is incorrect, I just did the assignment and got it right.
Answer 2
Answer: your answer is False love!

Related Questions

Determine the concentration of the unknown CuSO₄ solution using the slope intercept formula.
Forces and Motion:Question 2A student pushes a box to slide it across the floor. Which statement best explains why the box beginsto move?Select one:0 The weight of the box is less than the force of friction.OThe weight of the box is greater than the force of friction.The applied force is greater than the force of friction.OThe applied force is less than the force of friction
Which of the following is not part of daltons atomic theory
What is the (Ht] in a solution if the [OH'] = 5.42 x 10^-5 M?
When the compound, Ba(C2H3O2)2, is mixed with water, the Ba(C2H3O2)2 is:soluble because compounds containing the C2H3O2− ion are soluble in water insoluble because most compounds containing the C2H3O2− ion are insoluble in water soluble because all Ba+2 compounds are soluble in water insoluble because no Ba+2 are soluble in water

Determine the mass of oxygen in a 5.8 g sample of sodium bicarbonate (NaHCO3).

Answers

Answer is: the mass of oxygen is 3.31 grams.

m(NaHCO₃) = 5.8; mass of sodium bicarbonate.

n(NaHCO₃) = m(NaHCO₃) ÷ M(NaHCO₃).

n(NaHCO₃) = 5.8 g ÷ 84 g/mol.

n(NaHCO₃) = 0.07 mol; amount of sodium bicarbonate.

In one molecule of sodium bicarbonate there are three oxygen atoms:

n(NaHCO₃) : n(O) = 1 : 3.

n(O) = 3 · 0.07 mol.

n(O) = 0.21 mol.

m(O) = 0.21 mol · 16 g/mol.

m(O) = 3.31 g.

You are using a calorimeter to calculate the specific heat capacity of a metallic ore. The calorimeter contains 0.50 kilograms of water at room temperature (22 °C). We heat the ore in boiling water and then drop the metal into the calorimeter and wait for the water and metal to reach the same temperature. The mass of the ore is 3.5 kilograms. We find that the water has increased in temperature to 24.3 °C. Recall that the specific heat of water is 4.18 J/g–°C. Calculate the specific heat capacity of the ore.

Answers

the specific heat capacity of the ore : 0.018 J/g°C  

Further explanation

In the calorimeter, the heat received is the same as the heat released  

Q abs = Q release

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

Q released by a metallic ore and absorbed by water at calorimeter

Q ore = Q water

  • Q water

m = 0.5 kg = 500 g

c = 4.18 J/g–°C.

Δt = 24.3 - 22 = 2.3

\tt Q=m.c.\Delta t\n\nQ=500* 4.18* 2.3=4807~J

  • the specific heat capacity of the ore.

Q ore = Q water = 4807 J

m ore = 3.5 kg = 3500 g

Δt = 100 - 24.3 = 75.7

\tt 4807=3500* c* 75.7\n\nc=0.018~J/g^oC

What is binary fission

Answers

Binary fission: Asexual reproduction by division of nuclear materials in prokaryotes.


I hope that's help:0

Using less water is one way to practice watera. filtration.
b. distribution.
c. conservation.
d. irrigation.

Answers

Answer: Option (c) is the correct answer.

Explanation:

When we avoid wastage of water or overuse of then then it is known as conservation of water.

For example, turning off tap when bucket placed below it is filled with water means avoiding wastage of water.

Whereas over flow of water from the bucket is wastage of water.

Thus, we can conclude that using less water is one way to practice water conservation.
Using less water is one way to practice c. conservation. That would come in handy for a drought :D. Hope this helps and have a good day!

Which of the following is TRUE about ideal gas particles?A.They move in random directions.
B.They are very large.
C.They have high intermolecular forces.
D.They have inelastic collisions.
E.They always move in straight lines.

Answers

Answer:

The answer is A.

Explanation:

Gasparticlesdonothaveafixedpositionorvolumesotheymoveinrandomspeedanddirections.

(CorrectmeifIamwrong)

Which element is present in all organiccompounds?
(1) nitrogen
(2) oxygen
(3) carbon
(4) sulfur

Answers

i'm pretty sure hydrogen is but i would go with #3 carbon
Other Questions
A particle with 12 electrons has a -2 charge. How many protons does it have.
Which is a substance that is made up of only one type of atom? compound element solution mixture
Several substances are labeled on the pH scale below.A p H scale is shown ranging from 0 the top to 14 at the bottom. The approximate locations of substances are: gastric fluid, 1.2; lemon juice, 2.2; milk, 6.5; blood, 7.5; seawater, 8; milk of magnesia, upper M g (upper O upper H) subscript 2 solution, 10.5; household lye, upper N a upper O upper H solution, 13.5.Which substance has the lowest [H+] concentration but is still considered an acid?
For the amino acid alanine, the major species in solution at pH 7 is the zwitterionic form, which has a negatively charged carboxylic acid group and a positively charged amino group. There is a less common neutral form in which neither group is charged. The carboxylic acid group of alanine has a p K a of 3 . The amino group of alanine has a p K a of 8 . Estimate the ratio of the concentration of the neutral amino acid species to the zwitterionic species at pH 7 .