Answer:
613.0 g
Explanation:
2 L = 2000 mL
(30.65 g/100 mL)*2000 mL = 613.0 g
Given:
Solute + solvent = 30.65 g/100 mLSolvent = 2LSolution:
Firstly,
We converted L to mL
2 L = 2 × 1000 mL = 2000 mL [ 1 L = 1000 mL ]
Now,
Solute = 30.65/100 × 2000
= 30.65 × 2000 / 100
= 61,300/100
= 613
which statement describe a species adapting to changes in it’s environment?
Answer:
c
Explanation:
I would think adapting to changes would be the light moth being in a light trunk of a trees.
Answer:
a
Explanation:
dark colored moths become common after tree trunks become dark took the test.
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
Write the balanced equation for the production of oxygen gas and potassium chloride from the decomposition of potassium chlorate.
Answer:
2KClO₃→3O₂ + 2KCl
Explanation:
When Potassium Chlorate decomposes , the resulting products are oxygen gas and Potassium chloride . As per the equation above
An object has a mass of 10 kg. when a net force of 40 n north acts on the object, what is it’s acceleration ?
Answer:
4m/s² north.
Explanation:
Data obtained from the question include the following:
Mass (m) = 10Kg
Force (F) = 40N North.
Acceleration (a) =...?
Force is simply the product of mass and acceleration. It is represented mathematically as:
Force (F) = Mass (m) x acceleration (a)
F = ma
With the above formula, we can obtain the acceleration of the object as follow:
40 = 10 x a
Divide both side by 10
a = 40/10
a = 4m/s²
Since the force was applied in the north direction, the object will also accelerate in the north direction. Therefore, the acceleration of the object is 4m/s² north.
A(n)________ can change shape and volume.
Answer:
gas and liquid
Explanation:
right?
Which is more reactive: Lithium or calcium?
Answer:
Lithium is more reactive than calcium.
Explanation:
Lithium is more reactive than calcium. don't forget, lithium has one electron in its outer shell while calcium has . ... therefore less power is required to put off the the one electron from lithium than to remove the 2 from calcium, so lithium is more reactive.
Hope this helps..
Answer:
Lithium
Explanation:
You can ingest Calcium but not Lithium due to its toxix reactivity.
elements that are anions
Answer:
I hope this will help its not much
Explanation:
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:
What aspect relates to energy
Answer:
Respiration
Explanation:
it is the process by which food is broken down in the cell to release energy
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 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
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.
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.
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
help me with 23 fast
Answer:
a salt
Explanation:
compounds are made of molecules but we need to mention the type of compound formed.
Answer:
A salt
Because compounds are made of molecules but we need to mention the type of compound formed.
What is the name of CH3CH2CH2COOH?
Answer:
Butanoic acid
Explanation:
why electrons present around the nucleus of an atom do not fall into the nucleus
Answer:
Due to electrostatic force
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.
C5H12, pentane, is a liquid at room temperature.
Can we predict from this information whether C4H10, butane, will be a liquid at room temperature?
A)Yes, it will be a liquid since pentane is a liquid.
B)Yes, it will be a liquid since it contains 4 carbon atoms.
C)We cannot be sure unless we find out its boiling point.
D)We cannot be sure unless we get the boiling point of propane, C3H8.
Answer:
C)We cannot be sure unless we find out its boiling point.
Explanation:
It is necessary to clearly explain here that simply observing two compounds of the same homologous series irrespective of how close they may be in the series will not give us the faintest idea regarding which one will be a liquid, solid or gas at room temperature.
However, to determine whether an unknown substance will be a liquid at room temperature, then its important to measure its boiling point. If the boiling point is above room temperature, and the melting point is below room temperature, the compound is a liquid. If the boiling point of the unknown substance is below room temperature, it is a gas.
It is now safe to conclude that cannot decide on the state of matter in which a compound exists unless we know something about its boiling point, not merely looking closely at the properties of its neighbouring compounds in the same homologous series
. 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
State two characterstics of matter demostred
by
Diffusion
.) Brownian mation
Alex is on a special diet and needs to watch her intake of carbohydrates. Her doctor told her to maintain a 1,500 calorie per day diet and to make sure that these come from no more than 20% carbohydrates. She is snacking on pretzels and the nutrition label on the package says that there are 23 grams of carbohydrates per serving, which is 8% of the recommended daily allowance.
How many calories should Alex get from carbohydrates and what percentage of her total recommended intake of carbohydrates in grams is this snack? (1 gram of carbohydrate provides 4 Calories.)
Alex should get 300 Calories from carbohydrates, which is about 75 grams. This snack is 30% of her total grams of carbohydrates per day.
Alex should get 300 Calories from carbohydrates, which is about 33 grams. This snack is almost 70% of her total grams of carbohydrates per day.
Alex should get 300 Calories from carbohydrates, which is about 60 grams. This snack is about 38% of her total grams of carbohydrates per day.
Alex should get 300 Calories from carbohydrates, which is about 75 grams. This snack is 8% of her total grams of carbohydrates per day.
Answer: Alex should get 300 Calories from carbohydrates, which is about 33 grams. This snack is almost 70% of her total grams of carbohydrates per day.
Answer:
B
Explanation:
I think
please help with the question tagged below
Answer:
It can lose it's electrion
Explanation:
Why are fictional groups important
Answer:
Functional groups are important in chemistry because they are the portion of a molecule that is capable of characteristic reactions.
Explanation:
Answer:
pls help
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!
Purple Group Header Warm-Up Why can I smell a chocolate bar even though it is a solid? Read the description of the office mystery and write your prediction below. On a warm afternoon, a Universal Space Agency office worker returned from lunch break and noticed the office smelled like chocolate. She didn't see anything in the air, but she noticed her coworker was opening the wrapper of a solid bar of chocolate. Why can the office worker smell the chocolate bar even though it is in solid form?
Answer:
The smell of a chocolate is from the presence of volatile compounds present in the chocolate bar which at room temperature readily changes phase from solid to liquid to vapor or gas
Explanation:
There are nearly 600 identified compounds present in a chocolate bar and out of these, there are volatile components which gives the chocolate bar its distinctive aroma.
These volatile chocolate contents readily change phase from solid to vapor, with very short duration liquid phase.
For example, 3 methylbutanal, vanillin, and several organic compounds which are known to be readily volatile.
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.
Use Hess's Law to determine the enthalpy change (∆H) for the reaction: ClF + F2 → ClF3 Given: 2ClF + O2 → Cl2O + F2O. ∆H=167.4kJ 2ClF3 + 2O2 →Cl2O + 3F2O. ∆H=341.4kJ 2F2 + O2 →2F2O. ∆H=-43.4kJ
Answer:
The enthalpy change (∆H) for the reaction is -108.7 kJ
Explanation:
Hess's law can be stated as: when the reactants are converted to products, the enthalpy change is the same, regardless of whether the reaction is carried out in one step or in a series of steps. Then, Hess's Law states that the enthalpy of one reaction can be achieved by algebraically adding the enthalpies of other reactions.
So, to calculate the ∆H (heat of reaction) of the combustion reaction, that is, the heat that accompanies the entire reaction, you must make the total sum of all the heats of the products and of the reagents affected by their stoichiometric coefficient ( number of molecules of each compound participating in the reaction) and finally subtract them.
Enthalpy of combustion = ΔH = ∑Hproducts - ∑Hreactants
2 ClF + O₂ → Cl₂O + F₂O ∆H=167.4kJ
Cl₂O + 3 F₂O → 2 ClF₃ + 2 O₂ ∆H= -341.4kJ
The previous equation must be inverted, and the enthalpy value is also inverted, that is, the sign is changed.
2 F₂ + O₂ →2 F₂O ∆H=-43.4kJ
Reactants and products are added or canceled, taking into account that certain substances sometimes appear as a reagent and others as a product, so they are totally eliminated (there is nothing left of them anywhere in the reaction, if the same amount in reagents and products) or partially (this substance remains, in less quantity, only on one side), obtaining:
2 ClF + 2 F₂ → 2 ClF₃
Then, as all the reactants and products have a stoichiometric coefficient of 2, dividend by that number is obtained:
ClF + F₂ → ClF₃
Adding the enthalpies algebraically, and dividing by 2, because to get the "data" reaction you had to multiply by two, you get:
ΔH= [167.4 kJ - 341.4 kJ - 43.3 kJ]÷2
ΔH= -108.7 kJ
The enthalpy change (∆H) for the reaction is -108.7 kJ
What is Le Chatelier Principle ? Explain
I. Plant cells are formed from fertile soil. II. Cells must function properly for an organism to be healthy III.Cells make up the petals, stem, and leaves of a lily plant. IV. Bacteria are produced from other living bacteria. Which describes the statements that Schwann and Schleiden would make?
Answer:
No. 4
Explanation:
Bacteria are produced from pre existing bacteria
