Answer:
The correct answer is that it is made of atoms that are covalently bonded together.
Explanation:
Hope this helped Mark BRAINLEST!!!
What is in between the nucleus and electrons of an atom?
Answer:
The empty space between the atomic cloud of an atom and its nucleus is just that: empty space, or vacuum. ... Electrons are thus 'spread out' quite a bit in their orbits about the nucleus. In fact, the wave-functions for electrons in s-orbitals about a nucleus actually extend all the way down into the nucleus itself.
For the reaction
C2H4(g) + 302(g) → 2002 (g) + 2H20 (8)
if 6.0 mol of CO2 are produced, how many moles of Oz were reacted?
4.0 mol
0 7.5 mol
9.0 mol
o none of these
O 15 mol
Answer:
9.0 mol
Explanation:
C₂H₄(g) + 3O₂(g) → 2CO₂ (g) + 2H₂O (g)In order to convert from moles of CO₂ to moles of O₂, we need to use the stoichiometric coefficients in the balanced reaction. We use a conversion factor that has moles of CO₂ in the denominator and moles of O₂ in the numerator:
6.0 mol CO₂ * [tex]\frac{3molO_2}{2molCO_2}[/tex] = 9.0 mol O₂2. Which of the following are reactants of photosynthesis? *
a. carbon dioxide, water and light energy
b. glucose and oxygen
c. carbon dioxide, water and ATP
d. carbon dioxide, glucose and light energy
Answer:
A is the answer.
One essential step in the manufacture of many plant fertilizers is the production of nitrogen monoxide gas, NO(g). This step is represented by the following balanced equation: 4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(l)
Determine the amount of oxygen needed to produce 1.2 x 104 mol of nitrogen monoxide gas.
Answer: 1.5 moles, or 48 grams
Explanation:
Set up the following:
[tex]\frac{1.2 x 10^4 mol NO}{1}[/tex] × [tex]\frac{5 mol O2}{4 mol NO}[/tex] = 1.5 moles of O2 needed
If you're also looking for the number of grams needed:
[tex]\frac{1.5 mol}{1}[/tex] × [tex]\frac{32 g}{1 mol}[/tex] = 48 grams needed
how many atoms are in 4 H2PO4
Answer:
7
Explanation:
just add p has 1 o has 4 and h has 2
Which of the following describes an exothermic reaction?
O A. AHt, reactants > AHf, products
B. AHF, reactants = AHf, products
O C. AHf, reactants = 0
O D. AHF, reactants < AHt, products
The option A describes an exothermic reaction.
i.e, ΔHt,reactant > ΔHt, product
What is exothermic reaction?The reaction in which energy is release during the formation of reaction is called exothermic reaction.
Mathematically,
ΔHf = ΔH(product) - ΔH(reactant)
For exothermic reaction, ΔHt,reactant > ΔHt, product
So,for exothermic reaction, ΔHf is negative.
Where,
ΔHf = Enthalpy of formation of reaction
ΔH(product) = enthalpy of formation of product
ΔH(reactant) = enthalpy of formation of reactant
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please help due in 1 hour. This is 7th grade science. & in return I’ll help you on something! 15 points
Answer: MCCCMC
Please. Mark as brainliest
CAN SOMEONE PLEASE HELP ME LIKE ACTUALLY !
Atlantic Ocean has been expanding for millions of years. This is because of
volcanoes and earthquakes under the ocean.
plate collisions under the oceans.
convergent boundary.
spreading plates on the sea floor.
(つ ◕.◕ )つ Hey there again!
Answer → Last one Spreading Plates on the Sea Floor
✨Hope this helps✨
Write a balanced chemical equation, complete ionic equation and a net ionic equation for Copper lll sulfate and zinc.
Answer: CuSO4 (aq)+ Zn (s) → Cu (s) + ZnSO4(aq)
Explanation: do you mean copper II sulphate CuSO4?
Is grilling a ham and cheese sandwich and chemical or physical change?
Answer:
Physical
Explanation:
I say physical because if you just think about the cheese it wasnt melted before u put that heat on it .
Most ecosystems originally get their energy from
Select the statements that are true regarding open tubular and packed columns in gas chromatography.
A. For similar analysis times, open tubular columns provide better resolution than packed columns.
B. Packed columns offer increased sensitivity to small sample sizes.
C. Packed columns have a greater sample capacity than open tubular columns.
D. Open tubular columns give better resolution but longer analysis separation times compared to packed columns.
E. Packed columns give broader peaks with longer retention times.
Answer:
true or false :-
a) yes
b) no
c)yes
d)yes
e)no
For similar analysis times, open tubular columns provide better resolution than packed columns, Packed columns have a greater sample capacity than open tubular columns and Open tubular columns give better resolution but longer analysis separation times compared to packed columns are true regarding open tubular. Hence, options A, C and D are correct.
What is gas chromatography used for?The chemical constituents of a sample mixture are identified, separated, and quantified using an analytical technique called gas chromatography.
Gas chromatography is a technique for separating compounds in mixtures by injecting a gaseous or liquid sample into a mobile phase, which is usually referred to as the carrier gas, and passing the gas through a stationary phase. The mobile phase is often composed of an inert gas or an unreactive gas, such as helium, argon, nitrogen, or hydrogen.
Thus, options A, C and D are correct.
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vitamin can act like some thing what are those thing and how?
Answer:
Some nutrients also act as antioxidants. These may be vitamins, minerals, proteins, or other types of molecules. They help the body remove toxic substances known as free radicals, or reactive oxygen species. If too many of these substances remain in the body, cell damage and disease can result.
Organelles carry out specif functions within the cell. True False
Answer:
true
Explanation:
Which substance is not a fossil fuel?
Pretty easy question if you know science. 20 Points
A piece of nickel at 25 °C is dropped into a glass of water at 25 °C. Which statement is correct?
Heat will flow from the nickel to the water in the glass.
Heat will flow from the water in the glass to the nickel.
There will be no transfer of heat from the nickel to the water in the glass.
The final temperature of water and nickel will be 0 °C.
Answer:
C.
Explanation:
because the heat From the nickel and the heat from the water are the same.
As a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there will be no transfer of heat from the nickel to the water in the glass.
To answer the question, we need to know what heat transfer is.
What is heat transfer?This is the flow of heat energy from one body to another over a temperature gradient.
Heat transfer between Nickel at 25 °C and water at 25 °C.
Since a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there is no temperature gradient, since, both bodies are at the same temperature. Thus, no heat is transferred from the nickel to the water.
So, as a piece of nickel at 25 °C is dropped into a glass of water at 25 °C, there will be no transfer of heat from the nickel to the water in the glass.
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Two people are pushing a couch from opposite sides. One person is pushing to the right with a force of N. The other person is pushing to the lell William
4 N. Which of the following best describes the movement of the couch?
A. The couch will move to the left with a force of IN
B. The couch will not move.
C. The couch will move to the right with a force of 7 N
D. The couch will move to the left with a force of 7N
Answer:
The couch will not move because the people are not working together. Maybe if they call someone to help they can make some progress.
4. Why does iron corrode faster in salt water?
~My Answer~:
Water is the enabler of fast oxidation of iron so freshwater will also cause rust. However, salt water is a very good conductor (lots of dissociated ions) and so there are a number of electrolysis reactions that tremendously accelerate corrosion in salt water.
Meredith mixes together 5 grams of baking soda and 5 grams of vinegar in a test tube that is not sealed. She then weighs the product and
finds that it weighs 9 grams. Mathew conducts the same experiment, except in a sealed bag. He finds that 5 grams of baking soda and 5
grams of vinegar will result in 10 grams of product. Which of the following might account for their different findings?
O A. Some of the mass was created during the reaction between vinegar and baking soda in the bag.
OB. Some of the mass of the reactants was converted to light.
O C. Some of the mass escaped from the test tube as a gas before it was massed.
OD. Some of the mass from the test tube was destroyed.
Answer:
simple chemistry experiment—adding baking soda to vinegar—seems to challenge the law of conservation of mass.
Some of the mass escaped from the test tube as a gas before it was massed. Hence option C is correct.
What is experiment?Experiment is defined as a process used to confirm or deny a hypothesis, as well as assess the likelihood or effectiveness of a previously untested idea. Additionally, experiments are used by researchers to confirm or refute new or current theories. The structure or mathematical form of a theory can be hinted at by an experiment, and it can also provide proof that the entities involved in our theories actually exist.
Something new is created when vinegar and baking soda are combined. Carbon dioxide gas soon foams up in the mixture. All of the baking soda can be made to react and dissolve into the vinegar solution if enough vinegar is utilized.
Thus, some of the mass escaped from the test tube as a gas before it was massed. Hence option C is correct.
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4. Diffuse reflection occurs when parallel light waves strike which surface?
Answer:
rough surface
Explanation:
Diffuse reflection occurs when parallel light waves strike a rough surface
Answer:
Rippling fountain
Explanation:
What is the molarity of a solution that contains 45 mEq Ca“ per liter?
Answer:
0.0225 M
Explanation:
In one liter of this solution, there are 45 mEq of Ca⁺².
1 mEq of Ca⁺² is equal to 20 mg of Ca⁺. We know this by dividing its molar mass (40) by the charge of the ion (2).
Meaning that 45 mEq of Ca⁺² is equal to (45 * 20) 900 mg of Ca⁺².
Now we convert 900 mg of Ca⁺² into moles, using its molar mass:
900 mg / 1000 = 0.9 g0.9 g Ca⁺² ÷ 40 g/mol = 0.0225 mol Ca⁺²Finally we calculate the molarity of the solution:
Molarity = moles / liters0.0225 mol / 1 L = 0.0225 MWhich change absorbs heat?
A. Firing a rifle
B. Freezing water into ice
C. Melting cheese
D. Breaking rocks with dynamite
13. Describe the flow of thermal energy.
Plz help
Answer: Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy. ... This energy is usually in the form of low-level thermal energy. Here, low-level means that the temperature associated with the thermal energy is close to that of the environment. hope this helps. Can u pls give me brainliest
Explanation:
The diagram below represents H2 and Cl2 molecules that will potentially react to form HCI.
Hydrogen
Chlorine
Which of the following best describes this reaction?
А
The limiting reactant is chlorine.
B
The percent yield will be greater than 100%.
с
Hydrogen and chlorine are nonreactive.
D
All molecules shown will react to form the product.
The limiting reactant is chlorine in the given reaction of hydrogen and chlorine. Therefore, the correct option is option A.
What is chemical reaction?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical atom bonds are formed and broken during chemical reactions, which traditionally only involve changes in the locations of electrons.
The study of chemical processes involving unstable and radioactive materials, where both electronic or nuclear changes may take place, is known as nuclear chemistry. The limiting reactant is chlorine in the given reaction of hydrogen and chlorine.
Therefore, the correct option is option A.
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In terms of activation energy, why does increasing the temperature of a
reaction make it proceed more quickly?
A. Increasing the temperature reduces the activation energy.
B. Increasing the temperature increases the potential energy of the
reactants.
O C. Increasing the temperature increases how many reactant
molecules reach activation energy.
D. Increasing the temperature makes the molecules move slower.
Increasing the temperature increases the potential energy of the reactants, thus making the reaction faster.
What is activation energy?Activation energy is the minimum energy that reactant molecules must possess in order to collide together to form products.
Increasing the temperature of a reaction helped to make the reaction proceed faster. This is because more reactant particles acquire the energy greater than or equal to the activation energy.
Therefore, increasing the temperature of a reaction makes it proceed more quickly.
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i need help can someone help. pls
Which is an advantage of selling plant fertilizer as a powder rather than as a liquid?
Choose one.
A. The powder must be stored in a childproof container.
B.Transportation costs are reduced.
C.The powder may be a health hazard if proper procedures are not followed during mixing.
D.The gardener has to be able to read directions carefully and mix the proper amount of solvent and solute.
Answer:A
Explanation: because i saw the sheet
What is the molar mass of (NH4)2 CO3
In the Determination of an Equilibrium Constant lab, you will react acetic acid with ethanol in the presence of sulfuric acid until equilibrium is established. Then, you will titrate the equilibrium mixture with NaOH to determine the acetic acid concentration. Suppose you determine that the added sulfuric acid requires 2.97 mL of NaOH to be neutralized in a blank solution. The equilibrium mixture requires 12.92 mL of NaOH to reach the endpoint. What volume of NaOH should you use to calculate the acetic acid concentration at equilibrium
Answer:
9.95mL is the volume of NaOH that you must use
Explanation:
In the problem, you have in your blanck the presence of an acid as sulfuric acid. That means the blank requires an amount of NaOH to neutraliz its solution.
The volume required for the sample will be:
Volume of the sample - Volume of the blank
Beacuse we don't have to take into account the acidity of the blanck
12.92mL - 2.97mL =
9.95mL is the volume of NaOH that you must usewhat do The representative elements include
Answer:
aajajjajajajajajajajajdsjsjjx jajajjajajajajaisjn
Explanation: