Answer:
A molecule of the compound carbon dioxide consists of one atom of carbon and two atoms of oxygen, so carbon dioxide is represented by the chemical formula CO2. Q: What is the chemical equation for this reaction? A: The chemical equation is: C + O2 → CO.
Explanation:
can someone explain how to do this, I don't understand?
Answer:
a) 2
b) 3
c) 5
d) 6
Explanation:
Please help
Why it it not recommended to spill water over a fire that has erupted due to a short circuit?
Answer:
Dear frnd, water is a conductor of electricity and short circuit means a damage in electrical component in a device. Thus,water will spread the fire.
Explanation:
Pls mark as brainliest.Rocket Out
Please help me guys.
45.89 g of Hydrogen atoms contains how many moles of Hydrogen
atoms?
Please show work it’s due in 5 minutes I’ll give brainliest
2.63 g
Explanation:
One way to approach this problem is to determine the percent composition of hydrogen in water.
A scientist is measuring dissolved oxygen levels in a lake over a period of one year. Which collection of samples would ensure consistency regarding these measurements?
A. samples from the same locations and at the same depths each week
B. samples from different locations and at different depths
C. samples from the same locations but at different depths each month
D. samples from different locations at the same depth and at the beginning and end of the year
Answer: A
Explanation:
so, a gas, and an
ТВУ папіѕег на
3. Predict. If Joe wanted the reaction to "go faster," how could he change the procedure?
a) use a large sized piece of the solid Cu
b) lower the initial temperature below 25 °C for the liquid reactant, HNO3
c) use a 0.5 M HNO3 instead of 2.0 M HNO3
d) cut the large sized Cu solid into smaller sized pieces
Answer:
d) cut the large sized Cu solid into smaller sized pieces
Explanation:
The aim of the question is to select the right condition for that would increases the rate of the reaction.
a) use a large sized piece of the solid Cu
This option is wrong. Reducing the surface area decreases the reaction rate.
b) lower the initial temperature below 25 °C for the liquid reactant, HNO3
Hugher temperatures leads to faster reactions hence this option is wrong.
c) use a 0.5 M HNO3 instead of 2.0 M HNO3
Higher concentration leads to increased rate of reaction. Hence this option is wrong.
d) cut the large sized Cu solid into smaller sized pieces
This leads to an increased surface area of the reactants, which leads to an increased rate of the reaction. This is the correct option.
WILL GIVE BRAINLESS IF ALL ANSWER ARE CORRECT
Which of these is not a limiting factor for a population of squirrels?
a
Available space to build nests
b
Available water sources
c
Available friends to play
d
Available food to eat
Question 2 (4 points)
A decrease in limiting factors leads to an increase of biodiversity.
True
False
Question 3 (4 points)
If a disease destroying soybean plants in a field completely sweeps through an ecosystem, what would happen to the population of
songbirds that rely on the soybeans for food?
a
The songbird population would decrease
b
The songbird population will remain constant
c
The songbird population will increase rapidly
d
The songbirds will all crumple to the ground instantaneously
Question 4 (4 points)
Which of these limiting factors from the lesson is abiotic?
a
Predators
b
Food
c
Weather
d
Diseases
Question 5 (4 points)
Which of the following was given in the lesson as a limiting factor for organisms in the Caribbean Sea?
a
Amount of rainfall
b
Nesting locations
c
Water Temperatures
d
A lack of space within the mangrove swamps
Question 6 (5 points)
Are limiting factors positive, negative, or both for an ecosystem? Explain your reasoning
Question 7 (4 points)
When a population grows past the ecosystem's carrying capacity, what happens to the population?
a)It continues to grow
b)the population starts to die off to return to carrying capacity
c)The population will go extinct due to lack of resources
d)The population grows, then finds a new carrying capacity
Question 9 (4 points)
Will competition increase or decrease the carrying capacity of an ecosystem for the animals in competition?
increase
Decrease
Question 10 (4 points)
The largest number of individuals in a species that an environment can support long term...
a)Immigration
b)population Density
c)Emigration
d)Carrying Capacity
Answer:
See explanation
Explanation:
1) C
2) True
3) A
4) C
5) A
6) Both. Some species that rely on the limiting factors will be harmed and other species that are prey to those species relying on limiting factors will be benefited.
7) B
9) Decrease
10) D
An 8.5 g. Of ethanol (C2H5OH) placed in a constant volume calorimeter and the temperature rose to 3.2°C. Find the heat of reaction of the ethanol (MM =46.1 g/mol) in kJ/mol. The heat capacity of the calorimeter plus water is read as 6.38 J/°C
Answer:
[tex]\Delta H_{rxn}=-0.111 \frac{kJ}{mol}[/tex]
Explanation:
Hello!
In this case, since the total heat flow due to the reaction equals the negative of the calorimeter's heat, we can first compute the former as shown below:
[tex]Q_{rxn}=-C\Delta T\\\\Q_{rxn}=6.38\frac{J}{\°C}*3.2\°C=-20.416J[/tex]
Now, since this total heat flow due to the reaction is defined in terms of the heat of reaction and the total reacted moles:
[tex]Q_{rxn}=n*\Delta H_{rxn}[/tex]
Thus, we compute the moles in 8.5 g of ethanol:
[tex]n=8.5g*\frac{1mol}{46.08g}=0.185mol[/tex]
Therefore, the heat of reaction results:
[tex]\Delta H_{rxn}=\frac{Q_{rxn}}{n} =\frac{-20.416J}{0.185mol} =-110.7J/mol\\\\\Delta H_{rxn}=-0.111 \frac{kJ}{mol}[/tex]
Best regards!
Scientists are very curious about the world around them. What are some
aspects of the world around you that you find interesting? How might you
study some of these aspects?
According to the reaction below, how many grams of KCl (potassium chloride) can be formed from 70.90 g of chlorine with excess potassium?
2K + Cl2 ---> 2 KCl
Answer:
149.1 g KCl
Explanation:
2 K + Cl₂ ⇒ 2 KCl
This is your chemical equation. Use this equation to figure out the stoichiometry between Cl₂ and KCl. According to the equation, for every 2 moles of KCl, you need 1 mole of Cl₂, making the ratio between KCl and Cl₂ 2/1.
First, convert grams of Cl₂ to moles of Cl₂. The molar mass is 70.906 g/mol.
(70.90 g Cl₂)/(70.906 g/mol) = 0.9999 mol Cl₂
Convert moles of Cl₂ to moles of KCl using the stoichiometric relationship.
(0.9999 mol Cl₂) × (2 mol KCl/1 mol Cl₂) = 1.9998 mol KCl
Convert moles of KCl to grams of KCl. The molar mass is 74.55 g/mol.
(1.998 mol KCl) × (74.55 g/mol KCl) = 149.1 g KCl
You will produce 149.1 g KCl.
what reaction is 3Pb + 2H₃PO₄ ----> 3H₂ + 1Pb₃(PO₄)₂ *
Answer: double replacement
Explanation:
Answer:
Single Replacement
Explanation:
A + BC --> AC + B
A=Pb
B=H
C=PO4
What is the molar mass of H2CO3?
(atomic mass: C = 12.01, H = 1.01, O = 15.99)
Answer:62.00 g/mol you just need to look up every element atomic mass, and then multiply it by the number of atoms and then add it
The molar mass is equal to the sum of atomic mass of an atom.The molar mass of H₂CO₃ is 60.99.
What do you mean by molar mass ?Molecular weight M is a chemical compound's mass divided by its amount of substance measured in moles. MB = m/nB, where m is the total mass of a pure substance sample and nB is the amount of substance B given in moles.
The weight of one mole of a sample is defined as its molar mass. To calculate a molecule's molecular mass, multiply the subscript (number of atoms) by the atomic mass of each element in the molecule, then add the masses of all the elements in the molecule.
Finding the molar mass of a single element is a piece of cake. All you have to do is look up the element's atomic mass on the periodic table.
Given:
atomic mass: C = 12.01, H = 1.01, O = 15.99
The molar mass of H₂CO₃ = 1 × 1.01 + 12.01 + 3 × 15.99
= 1.01 + 12.01 + 47.97
= 60.99
Thus, The molar mass of H₂CO₃ is 60.99.
To learn more about the molar mass, follow the link;
https://brainly.com/question/22997914
#SPJ6
Cuáles son el pHy PoH de una solución cuya concentración de iones hidronio [H+]es de 0.000475 M de acido sulfurico?
The volume of a gas is 400 mL when the pressure is 1 atm. At the same temperature, what is the pressure at which the volume of the gas is 2 L
Answer:
the pressure is equal to 0.2atm
The pressure at which the volume of the gas is 2 L at the same temperature as when the volume of a gas is 400 mL and pressure 1 atm is 0.2 atm.
What is the combined Gas Law?According to combined gas law,
[tex]\rm \dfrac{PV}{nT} = R[/tex]
In the Combined Gas Law,if we change either one of the variables the others will also change.
When the moles of the gas is constant , the above equation can be written as ,
[tex]\rm \dfrac{P'V'}{T'} = \dfrac{PV}{T}[/tex]
Given is P = 1 atm , V= 400ml , V'= 2L= 2000ml , P'= ? T=T'
So we will substitute the values in the above formula keeping temperature constant.
[tex]\rm P'V' = PV\\\\\rm P' \times 2000 = 1 \times 400\\ \\\m P'= \dfrac{1\times 400}{2000} = 0.2 \; atm\\\\\rm P' = 0.2 \; atm\\[/tex]
Therefore the pressure at which the volume of the gas is 2 L at the same temperature as when the volume of a gas is 400 mL and pressure is 1 atm is 0.2 atm.
To know more about Combined Gas Law:
brainly.com/question/13154969
#SPJ2
Which of the following do all substituted hydrocarbons have in common?
They all have halogen groups.
B)
A hydrogen on an alkyl chain has been replaced by a heteroatom.
C)
They all contain oxygen.
D)
They're short-chain hydrocarbons.
Answer:
C they all have oxygen
Explanation:
look they all have oxygen , carbon has it so does the
How does a hydroelectric power plant convert energy?
A. As water flows through the channels toward the turbines, it has kinetic energy. This is changed to mechanical energy as the water turns the turbines. Then the mechanical energy of the turbines is changed to electrical energy by the generator.
B. As water flows through the channels toward the transformer, it has potential energy. This is converted to electrical energy by the transformer, and then the energy is magnified by the generator.
C. As water flows through the channels toward the generator, it has potential energy. This is changed to electric energy as the generator rotates. Some of the electric energy is used to change water's energy into kinetic energy.
D. As water flows through the channels toward the turbine, it has kinetic energy. This is changed to potential energy within the turbine. This potential energy is converted to electrical energy by the transformer.
PLS HELP I WILL GIVE BRAINLYIST!!!
what type of solid is H20 (ice)?
Answer:
Ice is a molecular and crystalline solid.
Explanation:
Water freezes at 0 degrees Celsius; it has strong molecular bonds between the hydrogen and oxygen atoms of each molecule, and weaker intermolecular bonds between each molecule of water. The polarity of the molecules helps align them into an organized, repeating patterned, crystalline structure when a solid.
WILD GUESS
OUT OF BAKUGOU SHOTO AND DEKU
GUESS WITCH ONE I SIMP FOR
Answer: all of them?
Explanation:
Answer:
Deku.
Explanation:
‼️‼️20 pt ‼️‼️HELP ‼️‼️
What is the effect on the graph of f(x) = x^2 when it is transformed to
h(x) = 1/6x^2 – 9?
A. The graph of f(x) is horizontally stretched by a factor of 6 and
shifted 9 units to the right.
B. The graph of f(x) is vertically compressed by a factor of 6 and
shifted 9 units down.
C. The graph of f(x) is vertically compressed by a factor of 6 and
shifted 9 units to the right.
D. The graph of f(x) is horizontally compressed by a factor of 6 and
shifted 9 units down.
Answer:
D.
Explanation:
The graph of f(x) is vertically compressed by a factor of 6 and shifted 9 units down
The teacher asked the students to design an experiment that would demonstrate that temperature will affect the pressure of a gas. Which of the
following would be a valid experiment that shows the correct relationship between gas temperature and pressure?
The correct option is option A. when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.
How are pressure and temperature of a gas related ?
According to Gay lussac's law, the temperature and pressure of a gas are directly proportional to each other, provided the volume is constant.
When the temperature of a gas is increased, the molecules gain more kinetic energy and hence the frequency of them hitting the walls of the container increases which basically implies that the pressure increases.
On the other hand when the temperature is low, the molecules do not have substantial kinetic energy to hit the walls of the container frequently, that is the pressure decreases.
When the bicycle tires were kept out in the winter, the low temperature decreased the air pressure inside the tires. While when they were warmed at room temperature, the pressure inside the tires increased.
Therefore, the correct option is option A. when the students check the air pressure of bicycle tires, once by keeping it out in the winter and noticing the air pressure being decreased and after by keeping the bicycle inside at room temperature and noticing that the air pressure has increased.
To know more on Gay lussac's law, click on
https://brainly.com/question/30758452
#SPJ2
What type of galaxy is pictured?
A.) elliptical
B.) irregular
C.) lens
D.) spiral
Which element will form an ionic bond with chlorine (Cl): bromine (Br) or magnesium (Mg)
Answer:
The answer is Magnesium
_Na2B407 + _H2SO4(aq) +
H2SO4(aq) + -_H200 → __H3BO3(s) + __Na2SO4(aq)
Balance the Equation
Answer:
Na2B4O7 + H2SO4 + 5H2O → 4H3BO3 + Na2SO4
Explanation:
The unbalanced equation is given as;
Na2B4O7 + H2SO4(aq) + H2O → H3BO3(s) + Na2SO4(aq)
Balancing the equation of the reaction involves making sure the number of moles of elements in the reactants to be equal to the number of moles of the element of the products.
The balanced equation is given as;
Na2B4O7 + H2SO4 + 5H2O → 4H3BO3 + Na2SO4
(GIVING BRAINLIEST)
....
Answer:
C
Explanation:
Because a planet is a celestial body distinguished from the fixed stars by having an apparent motion of its own (including the moon and sun), especially with reference to its supposed influence on people and events.
Answer:
it is the second one ;)
Explanation:
HEELPPP!!!
What is the charge of the nucleus?
a) negative
b) positive
c) neutral
Answer:positive
Explanation:
Answer:
Positive.
Explanation:
Since a neutral charge won't cancel out a positive charge, the overall charge of a nucleus is positive.
Daniel is conducting an experiment on magnetic objects. He completes more than one trial. Why is it important for Daniel to do this?
The conclusion is less accurate.
The conclusion is more accurate.
There is a greater chance of error.
The results will be inaccurate.
Answer:The conclusion is less accurate.
Explanation:
Feb 17, 2021 — He completes more than one trial. Why is it important for Daniel to do this?
Refer to the following balanced equation in which ammonia
reacts with nitrogen monoxide to produce nitrogen and water.
4NH3(g) + 6NO(g) → 5N2 (9) + 6H20(1)
How many moles of NH3 are necessary to produce 0.824
mol N2 ?
mol NH3
-Your answer should be rounded to three significant figures.
-Do not Include units
in your answer.
Answer:
0.659
Explanation:
n(NH3)/n(N2)=4/5
n(NH3)=4/5×0.824 =0.659
Who is wise president of india?
________________________
does anyone have the gizmo cell types answer key for activity d?
Answer:
im sorry i dont
Explanation:
Ammonium perchlorate NH4ClO4 is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas N2, chlorine gas Cl2, oxygen gas O2, water H2O, and a great deal of energy. What mass of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate? Be sure your answer has the correct number of significant digits.
Answer: 0.99 grams of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text{Number of moles of } NH_4ClO_4=\frac{3.3g}{117.5g/mol}=0.028moles[/tex]
The decomposition of ammonium perchlorate is :
[tex]2NH_4ClO_4\rightarrow Cl_2+N_2+2O_2+4H_2O[/tex]
According to stoichiometry :
2 moles of [tex]NH_4ClO_4[/tex] produce = 1 mole of [tex]Cl_2[/tex]
Thus 0.028 moles of [tex]NH_4ClO_4[/tex] produce=[tex]\frac{1}{2}\times 0.028=0.014moles[/tex] of [tex]Cl_2[/tex]
Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=0.014moles\times 71g/mol=0.99g[/tex]
Thus 0.99 grams of chlorine gas is produced by the reaction of 3.3g of ammonium perchlorate