Answer:
the product of q in the reaction below is Nacl
Find the number of moles of sodium hydroxide in 25cm3 solution of concentration 0,1 mol/dm3
Answer:
0.0025 moles
Explanation:
25cm^3 = 25/1000 dm^3
Conc = mol/dm^3
Mol = conc * dm^3
Mol = 0.1 * 25/1000
if 0.00327 g of a gas dissolves in 0.376 L of water at 867 torr, what quantity of this gas (in grams) will dissolve at 759 torr?
Answer:
0.00286
Explanation:
Hope this helps!
Answer:
0.00286
Explanation:
:)
Write the formula for each compound
a. Chromium(III) sulfite
b. Magnesium hypochlorite
c. Nickel(II) nitrate hexahydrate
Answer:
Chromium(III) Sulfite Cr2(SO3)3 Molecular Weight
Mg(ClO)2 - PubChem
Ni(NO3)2
HELP ME ASAPPPP PLZZZZZ!!!!!
For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 16.8 moles of methane, CH4 ?
What makes a strong acid different from a weak acid?
Answer:
D. A strong acid dissociates more completely than a weak acid.
Explanation:
A P E X
What is the name of the molecule below
Answer:
2-octene
Explanation:
the 8-carbon chain (oct); has a double bond (ene) is on the 2nd carbon (2-)
How does peer review affect research?
A. Experimental results will be trusted by the scientific community
only if they have been peer-reviewed.
B. Experimental results will be published only before they have been
peer-reviewed.
C. An experiment will not be repeated by others if it has been peer-
reviewed.
O D. Experimental results are possible only if they have been peer-
reviewed.
Answer:
A: Experimental results will be trusted by the scientific community
only if they have been peer-reviewed.
Explanation:
It is NOT C as I have tried it, it did not work and makes no sense.
Plz Help I have One more time To retake and I can't fail it..
[tex]option(a)[/tex]
Explanation:
You answer is correct as you move from left to right across a period. But, the question is asked regarding to the right to left across a period. So, as you move from right to left across a period, you can find firstly Non-metals, secondly Metalloids, and lastly Metals.
13.8g element consist 4.6 ×10^22 atoms what is atomic mass of element?
We know that,
4.6 x $ \sf{10^{22}}$ atoms of an element weigh 13.8g.Thus,
The atoms of $ \sf{ 6.02 \times 10^{13}}$ will weigh;
[tex] = \sf{\frac{13.8 \times 6.02 \times {10}^{23} }{4.6 \times {10}^{22} } } \\ [/tex]
[tex] = \sf{180.6 \: g \: \: (molar \: mass)}[/tex]
Hence, the molar mass (atomic mass) will be 180.6 g.What information is obtained from radioactive dating?
- How old something was when it died
- The damage done to an object from radiation
- The age of an object that was once living (ANSWER)
- The lifetime of an isotope in a particular object
Answer:
C
Explanation:
The age of an object that was once living. Hence, option C is correct.
What is radioactive dating?Radioactive dating can be defined as a strategy to date the age of fossils by means of radioactive isotopes.
These methodologies (Radioactive dating) are fundamental for the application field of geologists and palaeontologists.
In conclusion, Radioactive dating refers to the techniques used to date the age of rocks and fossils by radioactive isotopes.
Information related to the age of an object that was once living is obtained from radioactive dating.
Hence, option C is correct.
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The characteristics of a certain gas are listed in the table.
What is the expected density of the above sample of gas?
A - 3.16 g/L
B - 1.58 g/L
C - 1.21 g/L
D - 1.03 g/L
Answer:
Option A. 3.16 g/L
Explanation:
We'll begin by calculating the molar mass of Cl₂. This can be obtained as follow:
Molar mass of Cl₂ = 2 × 35.45
= 70.9 g/mol
Finally, we shall determine the density of Cl₂. This can be obtained as follow:
Molar mass of of Cl₂ (M) = 70.9 g/mol
Pressure (P) = stp = 1 atm
Temperature (T) = stp = 273 K
Gas constant (R) = 0.0821 atm.L/Kmol
Density (D) =?
D = PM / RT
D = (1 × 70.9) / (0.0821 × 273)
D = 70.9 / 22.4133
D = 3.16 g/L
Thus, the density of the gas is 3.16 g/L.
Which word equation best describes the following formula equation:
2HNO3 + Ca(OH)2 → Ca(NO3)2 + 2H2O?
A. Nitric acid and calcium hydroxide react to form calcium nitrate and water.
B. Two molecules of calcium nitrate react with one molecule of calcium hydroxide to form one
molecule of nitric acid and two molecules of water.
C. Two molecules of nitric water and one molecule of calcium water react to form one molecule of
nitric acid and two molecules of water.
D. Two molecules of nitric acid react with one molecule of calcium hydroxile to form one molecule
of calcium nitrate and two molecules of water.
Answer:
D
Explanation:
This is because that is the systematic name of the compounds above.
Two molecules of nitric acid react with one molecule of calcium hydroxide to form one molecule of calcium nitrate and two molecules of water. Hence, option D is correct.
What is an equation?A word equation represents a chemical reaction using the names of the substances involved.
[tex]2HNO_3 + Ca(OH)_2[/tex] → [tex]Ca(NO_3)_2 + 2H_2O[/tex]
Two molecules of nitric acid react with one molecule of calcium hydroxide to form one molecule of calcium nitrate and two molecules of water.
Hence, option D is correct.
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The sum of the kinetic energies and potential energies of all of the molecules
in a substance is called the energy of the substance?
Answer:
The correct answer is - internal energy.
Explanation:
The movements of the particles are continuous inside In any substance/object, within random directions and with random speeds which are termed as Brownian motion.
Due to these movements, these substances have some kinetic energy and the interaction between particles takes place due to the presence of electrostatic intermolecular forces, this leads to having some potential energy. The sum of the kinetic energies and potential energies of the particles in a substance is called internal energy it is internal to the confines of the substance.
What is the atomic mass of sulfur (S)?
Answer:
atomic mass of sulfur is 32.06 g/mol
Explanation:
Is there law in the United States? Why are black people killed at random by police?
We mix 2.5mL of NaOH 0.5M with 2.5mL of HCl 0.5M both at 25◦C in a constant-pressure calorimeter. The heat of reaction is -40KJ/mol. Calculate the final temperature inside the calorimeter, if the solution density is 1g/mL and the specific heat of the solution is 4.184J/g ◦C.
Answer:
awawaw
Explanation:
The graph shows the change in concentration of one of the species in the reaction
A + B + C→D.
If the graph indicates the reaction rate, then the concentration of which species is plotted?
A
B
C
D
Answer:
its D
Explanation:
Took the test
The specie whose concentration is plotted is D. The rate of reaction is how quickly or slowly hat a reaction proceeds.
Rate of reactionThe term rate of reaction refers to how quickly or slowly hat a reaction proceeds. A reaction rate plot involves the concentration of the species plotted against time.
Now we can see from the plot that concentration is increasing with time. Since the concentration of products increases with time, then the specie whose concentration is plotted is D.
Learn more about rate of reaction: https://brainly.com/question/11256472
What effect does the electrostatic force have?
- Particles without charge repel each other.
- Particles of different masses repel each other.
- Particles of opposite charge repel each other.
- Particles of the same charge repel each other. (ANSWER)
D
Explanation:
Particles of the same charge repel each other
A galaxy that has an undefined shape is best classified as a(n)
galaxy.
Answer:
irregular galaxy
pls give brainliest :)
Answer:
irregular galaxy
it is undefined shape
Which particle has an electronic structure of 2.8.8?
Answer:
argon has an element structure of 2.8.8
Answer:
Argon
Explanation:
Argon has a electron configuration of 2.8.8. This shows an octate state, meaning that it has no lose pair of electrons. It has a total of 18 electrons on its shell
What is a nucleus please telll me
Answer:
A nucleus is the center of an atom that consists of protons and neutrons. Different elements have a different number of protons and neutrons
Explanation:
What must scientists look for in their experiment or their data to make sure it is accurate?
Which word goes we’re ?
what is water
a. a universal solvent
b. something you can drink
c.a liquid
Answer:
FIRST OPTION WHICH IS A: UNIVERSAL SOLVENT
Explanation:
Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
Answer:
according to Chemistry its A
Name the following bases.
Fe(OH)3
- iron(III) hydroxide
- iron(II) hydroxide
- iron hydroxide
Answer:
1
Explanation:
Ferric Hydroxide
3. 1
Fe. (OH)
Fe(OH)3
Answer:
iron(III) hydroxide
Explanation:
I just took the quiz!
which one is unsaturated hydrocarbon?
options:
I) C3H8
2) CH4
3) C2H6
4) C2H4
pls tell the answer fast
Answer:
The correct answer is - D C2H4.
Explanation:
Saturated hydrocarbons are hydrocarbons with single covalent C-C bonds. They are known as alkanes. The general formula for these hydrocarbons is CnH2n+2
Unsaturated hydrocarbons the hydrocarbons with double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is CnH2n and CnHn-2
For the given options:
Option D: C2H4, is the simplest alkene with a double bond so it is an unsaturated hydrocarbon.
What is one way to prevent soil erosion?
A. Plant trees
B. Plow fields
C. Spray weed killer.
D. Remove mulch.
its a plant trees
(need character limit)
When a drawing of a circle made in the center of a piece of paper with a black marker gets wet, the marker bleeds, and as the water moves through the paper the ink separates into several colors.
Answer:
Chromatography
Explanation:
Chromatography is a technique for separating mixtures that involves the use of a moving liquid and filter paper. The solvent travels through the spots on the paper, taking the chemicals away in the opposite direction. If the solvent combination has been properly chosen, each of them will move at a different velocity than the others.
Question:
Nearly the entire world uses the metric system for their measurements. The US is one in of three countries that does not use metric. Would you support changing school curriculum to teach the metric system as the primary measurement system in the US? Why or why not.
(It must be 3-5 sentences long please)
Answer:
I would
Explanation:
I would support the change to the metric system only because it allows children to understand smaller forms of units and measurements. Also, it will allow people in the math and science fields to broaden their knowledge of equations and formulas. Meaning that the scientist and mathematicians will be able to solve more problems in the world right now. Overall, the education system for the children of the United States would benefit from the change in the measurement system.
A chemical reaction requires you to use 3.25 mol of sodium chloride. How many
grams of sodium chloride are needed to supply 3.25 mol of sodium chloride?
Answer:
3.25 moles of sodium chloride to grams: 189.3545 grams
Explanation:
1 moles NaCl = 58.44277 gram
