Answer:
0.74M
Explanation:
Step 1 :
Data obtained from the question.
Initial concentration (C1) = 3M
Initial volume (V2) = 185mL
Final volume (V2) = 750mL
Final concentration (C2) =..?
Step 2:
Determination of the new concentration of the solution.
The new concentration of the solution can be obtained by using the dilution formula as shown below:
C1V1 = C2V2
3 x 185 = C2 x 750
Divide both side by 750
C2 = 3 x 185 / 750
C2 = 0.74M
Therefore, the new concentration of the solution is 0.74M
Describe what you can do to slow down, or stop the continuous negative human treatment of our aquatic biomes.
Answer:
The major cause of continuous negative human treatment of our aquatic biomes include pollution and overfishing. It can however be slowed down by less dependence of aquatic animals for food in order to preserve the aquatic biomes.
Advocacy should be done also to sensitize people about the effects of pollution and overfishing in water bodies. Pushing for the enforcement of rules protecting the aquatic biomes from pollution should also be taken note of to improve the conditions of the biome.
Urgent help please!!
Answer:
1. 2.1 moles of Mg
2. 0.72 mole of Mg(OH)2
Explanation:
1. We'll begin by writing the balanced equation for the reaction. This is given below:
3Mg + 2AlBr3 —> 3MgBr2 + 2Al
From the balanced equation above, 3 moles of Mg reacted to produce 2 moles of Al.
Therefore, Xmol of Mg will react to produce 1.4 moles of Al i.e
Xmol of Mg = (3 x 1.4)/2
Xmol of Mg = 2.1 moles.
Therefore, 2.1 moles of Mg is required to 1.4 moles of Al.
2. We'll begin by calculating the number of mole in 26g of water, H2O.
This is illustrated below:
Molar mass of H2O = (2x1) + 16 = 18g/mol
Mass of H2O = 26g
Number of mole of H2O =?
Mole = Mass /Molar Mass
Number of mole of H2O = 26/18
Number of mole of H2O = 1.44 moles
Next, we shall write the balanced equation for the reaction. This is given below:
2HNO3 + Mg(OH)2 —> Mg(NO3)2 + 2H2O
Finally, we can obtain the number of mole of Mg(OH)2 used in the reaction as follow:
From the balanced equation above,
1 mole of Mg(OH)2 reacted to produce 2 mole of H2O.
Therefore, Xmol of Mg(OH)2 will react to produce 1.44 moles of H2O i.e
Xmol of Mg(OH)2 = (1 x 1.44)/2
Xmol of Mg(OH)2 = 0.72 mole.
Therefore, 0.72 mole of Mg(OH)2 was used in the reaction.
Write down the “Word chemical equation” for the following described chemical reaction. 1.When Harris dropped a lump of magnesium into a test tube of hydrochloric acid, the chemical magnesium chloride was formed. Harris also noticed a gas being formed. The gas formed was Hydrogen.
Answer:
Here is the word equation and balanced equation to this question.
Explanation:
Magnesium + hydrochloric acid ⇒ Magnesium Chloride + Hydrogen gas
Mg + 2HCl⇒ MgCl₂ + H₂
If each washer has a mass of 4.9 g, then the mass of two washers in kilograms would be . Given that F = ma, and if 4 washers are attached to the string and car instead of 2, then the applied force on the car will be .
Answer:
0.192 N
Explanation:
Answer:
I just did it in ed
Explanation:
Mario brings his hands near a fire and feels its warmth.If the air around Mario's fireplace is still, most of the heat is reaching his hands through _______.
Answer:
Radiation
Explanation:
While being beside a campfire, the heat is transmitted by radiation from fire.
please help with the question tagged below
Answer:
It can lose it's electrion
Explanation:
Which is a type of lipid?
A. Disaccharide
B. Triglyceride
C. Nucleotide
D. Enzyme
SUBMI
Answer:
B. triglyceride
Explanation:
Answer:
triglyceride becauseit is a fatty acid
why do you think the purple cabbage indicator used in this experiment is called "red cabbage"? where is it typically used in food?
Answer:
Red cabbage juice contains a natural pH indicator that changes colors depending on the acidity of the solution. The pigment in red cabbage that causes the red color change is called flavin (an anthocyanin). ... At a lower pH, more hydrogen ions are in solution, and therefore the solution is acidic
Actually I don't know but I tried so I hope it helped u!
A chemist dissolves 73 grams of sodium chloride (NaCl) in water. The final volume of the solution is 1,050 milliliters. What is the molarity of the solution?
Answer: 1.2
Explanation:
Which formula represents a hydrocarbon?
A) CH3I
B) CH3NH2
C) CH3CH3
D) CH3OH
The kinetic molecular theory helps explain relationships between
It explains the relationships between molecules of gases, liquids and solids.
gases, energy, temperature, phases.
To what Kelvin temperature must a balloon
be cooled if its original temperature
was 323 °C to cause a 2.85 L balloon shrink to 1.25 L?
Answer:
[tex]T_2=261.46\ K[/tex]
Explanation:
It is given that,
Original temperature, [tex]T_1=323^{\circ}C=596.15\ K[/tex]
Original volume, [tex]V_1=2.85\ L[/tex]
We need to find the temperature if the volume of the balloon to be shrink to 1.25 L.
According to Charles law, at constant pressure, [tex]V\propto T[/tex]
It would means, [tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}[/tex]
T₂ = ?
[tex]T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{1.25\times 596.15}{2.85}\\\\T_2=261.46\ K[/tex]
So, the new temperature is 261.46 K.
Which of the following could be classified as matter? desk,water,idea,cloud,helium,dream
Answer:
Desk water cloud heliumExplanation:
because matter occupies space
Answer:
Matter is anything that has weight and occupies space
So examples of matter are
Desk, water, cloud, and helium.
Explanation:
How many total orbitals are within the 3s 3p, and 3d sublevels of the third
energy level?
A. 8
B. 9
C. 1
D. 4
Answer:
9
Explanation:
Answer:
b
Explanation:
What does global wind mean
Answer:
Global winds are the main belts of wind that move in a particular direction across the earth
Answer:
Global winds are the main belts of wind that move in particular directions across the Earth.
Explanation:
All wind is caused by the uneven heating of Earth's surface, which sets convection currents in motion. Convection currents on a large scale cause global winds; convection currents on a small scale cause local winds.
hope that helps love!
why electrons present around the nucleus of an atom do not fall into the nucleus
Answer:
Due to electrostatic force
Which form of energy is directly related to the measure of the average kinetic energy of the particles in a substance?
thermal energy
potential energy
mechanical energy
electromagnetic energy
Answer:
thermal energy
Explanation:
PLEASE I REALLY NEED ANSWER REAL QUICK
1. 800g of solution of NaCl has 5% of the percent by mass. Find mass of water is required?
a. 780g
b. 760g
c. 740g
d. 720g
e. Other.. and give solution.
Answer:
b. 760 g
Explanation:
The mass of the solution = 800 g
5% of NaCl by mass of the solution can be determined as follows;
5% of 800 = [tex]\frac{5}{100}[/tex] × 800
= 5 × 8
= 40 g
The mass of NaCl in the solution is 40 g.
The mass of water = mass of solution - mass of NaCl
= 800 - 40
= 760 g
Therefore, the mass of water required is 760 g.
Draw a schematic diagram with a battery, connecting wires, a light bulb, and an ammeter in a series circuit.
Answer:
here it is
....................................................................................................................................
Which compound is an isomer of C2H5OC2H5?
A) CH3COOH
B) C2H5COOCH3
C) C3H7COCH3
D) C4H9OH
Answer:
D) C₄H₉OH
Explanation:
In chemistry, isomers are chemical substances with the same formula (That is, same atoms but in different structures).
For the compound C₂H₅OC₂H₅ there are 4 atoms of C, 10 atoms of H and 1 atom of O.
A) CH₃COOH . This compound have 2 atoms of C, 4 atoms of H and 2 atoms of O. Thus, isn't an isomer.
B) C₂H₅COOCH₃. There are 4 atoms of C but 8 atoms of H and 2 atoms of O. Isn't an isomer
C) C₃H₇COCH₃. There are 5 atoms of C, 10 atoms of H and 1 atom of O. Thus, isn't an isomer
D) C₄H₉OH. Here, you have 4 atoms of C, 10 atoms of H and 1 atom of O. That means this structure is the isomer of C₂H₅OC₂H₅
. Write down the “Word chemical equation” for the following described chemical reaction. 1.When Harris dropped a lump of magnesium into a test tube of hydrochloric acid, the chemical magnesium chloride was formed. Harris also noticed a gas being formed. The gas formed was Hydrogen. Abu bakar reacted a lump of calcium carbonate with some sulphuric acid. Two of the products formed were water and calcium sulphate. The other product formed was a gas that turned lime water milky which proves its carbon dioxide. 3. Manal was learning about photosynthesis. She looked on the internet and found that in this process, plants take in carbon dioxide gas from the air and water from the ground. Using energy from the sun they can turn these chemicals into a kind of sugar called glucose and gas called oxygen. 4. When an iron object is left in damp air (or water) for a considerable time, it gets covered with a red-brown flaky substance called rust. This is called rusting of iron. During the rusting of iron, iron metal combines with the oxygen (of air) in the presence of water (moisture) to form a compound iron oxide. 5. When acid such as Hydrochloric acid reacts with basic compound like sodium hydroxide, it leads to the formation of a salt called sodium chloride and water as end products.
Answer:
1. Mg+Hcl--》Mgcl2 + H2
fill in the blank
1 electronic configuration of 1531p is
2.what would be the atomic number of an atom with 6 valence element
Answer:
I didn't get you
Explanation:
Please explain
Balance the following Equation and identify what type of reaction it is:
AlBr3 + K2SO4 ---> KBr + Al2 (SO4)3
Answer:
2AlBr3+3K2So4----> 6KBr + Al2(So4)3
Explanation:
What is Le Chatelier Principle ? Explain
Describe the procedure Bourouiba uses to study sneezes.
Answer:
The Lydia Bourouiba is recorded is around more than the 100 sneezes and coughs cases.
Explanation:
Lydia Bouroubia was a mathematical physicist who does experiments on sneezes and coughs. She was a leading expert in coughs and sneezes. Sneezing is a phenomenal activity that occurs in our body to excrete the dust particles and germs.
The disease also spread through it. Lydia thought that her research will help people related to their health. It will help in stopping epidemics in public. It is a type of outbreak of disease at a bigger level in the public.
What is the chemical equation for lead (ll) acetate reacts with potassium iodide to produce lead(ll) iodide and potassium acetate
Answer:
Pb(C2H3O2)2 + KI ----> PbI2 + KC2H3O2
Explanation:
all the numbers are written as subscripts
What is the protein that helps us identify the blood type
Answer:
Antigens (more info below)
Explanation:
Antigens determine the blood type and may be either proteins or sugar molecule complexes (polysaccharides). Genes in the blood group antigen group provide instructions for the production of antigen proteins. Blood group antigen proteins serve a variety of functions within the red blood cell membrane.
hope I helped!
A force of 6 newtons is used to move an object 10 meters. How much work is done?
600 newton-meters
6 newton-meters
60 newton-meters
10 newton-meters
Answer:
60
Explanation:
its force x distance
A 100 kg tree gets struck by lightning and is burned completely to ash. A scientist gathers up all the ash and weighs it to find only 90kg there. Where did the other 10kg go?
Answer:
Evaporated via combustion.
Explanation:
The loss on ignition (LOI) and Ash content are inorganic analytical techniques used to determine the percentage by mass of hydrocarbon in compounds. This process allows volatile matter and possibly impurities found in a material to evaporate, leaving behind the true chemical constituents of the material.
The 10kg lost could be moisture content of the tree, or other volatile matter which has escaped on combustion of the tree.
An alkali is able to “cancel” out an acid. What is the other word for “cancelling out the acid”?, Ill mark brainliest if your answer is correct ;))
a) neutralise
b) overcome
c) nullify
d) become acidic
Answer:
neutralise
Explanation:
There is a special name given to the reaction between an acid and a base to form salt and water and water only. That name is 'neutralization'. Hence to 'neutralize' an acid connotes the idea of 'cancelling' the effect of an acid.
An acid has a number of deleterious effects on surfaces, the most prominent of which is corrosion of the surface due to oxidation. If a surface is accidentally exposed to an acid, the effect of that acid on the surface can be counteracted by the immediate application of a base to 'neutralize' the acid. Neutralization in this sense is akin to 'cancelling' out the acid.
The examples are endless. Another common example is the neutralization of an acidic soil by a base in order to 'cancel' the acidity of the soil and make the soil fertile for plant growth.
