6.
Increasing light
This type of response is a main function of the -
A.
excretory system.
B.
circulatory system.
C.
endocrine system.
D
nervous system.
Answer: d: nervous system
Explanation:
When focused light is projected onto the retina, it stimulates the rods and cones. The retina then sends nerve signals are sent through the back of the eye to the optic nerve. The optic nerve carries these signals to the brain, which interprets them as visual images.
find the empirical formula for
42.05g of nitrogen, 95.95 of oxygen
and
7.33g of lanthanum, 2.96g of oxygen
Answer:
[tex]NO_2[/tex] and [tex]La_2O_7[/tex]
Explanation:
Nitrogen:
[tex]\frac{42.05}{14}=3[/tex]
Oxygen:
[tex]\frac{95.95}{16}=6[/tex]
Ratio:
[tex]3:6=1:2[/tex]
So empirical formula becomes [tex]NO_2[/tex]
-----
Lanthanum:
[tex]\frac{7.33}{139}=0.0527[/tex]
Oxygen:
[tex]\frac{2.96}{16}=0.185[/tex]
Ratio:
[tex]0.0527:0.185=1:3.5=2:7[/tex]
So empirical formula becomes [tex]La_2O_7[/tex]
The disinfectant hydrogen peroxide (H2O2)
decomposes to form water and oxygen gas.
How much O2 will result from the decomposition of 7.6 mol of hydrogen peroxide?
Answer in units of mol.
Answer: amount of O2 is 3.8 moles
Explanation: reaction. 2 H2O2 -> 2 H2O + O2
Two moles H2O2. Produces one ole Oxygen
What substances will dissolve in water?
nonpolar
polar
Answer:
polar
Explanation:
What is a limitation for using solar energy to meet global energy needs?
Answer:
The sun provides more than enough energy to meet the whole world's energy needs, and unlike fossil fuels, it won't run out anytime soon. As a renewable energy source, the only limitation of solar power is our ability to turn it into electricity in an efficient and cost-effective way.
where is the magnitude of force of magnetism the greatest
Answer:
The strength of the field varies depending on its location around the magnet. The magnetic field of a bar magnet is strongest at either pole of the magnet. It is equally strong at the north pole when compared with the south pole.
Explanation:
From the balanced reaction below, when you have 3.33 moles of (NH4)2Cr2O7, how many grams of N2 will be produced
Answer:
[tex]m_{N_2}=93.3gN_2[/tex]
Explanation:
Hello there!
In this case, for this stoichiometry-based problem, it is firstly necessary to realize that the decomposition of ammonium dichromate is given by:
[tex](NH_4)_2Cr_2O_7(s)\rightarrow N_2(g)+4H_2O(l)+Cr_2O_3(s)[/tex]
Thus, since the mole ratio between ammonium dichromate and the gaseous nitrogen (molar mass = 28.02 g/mol) is 1:1, we can compute the produced mass of the latter via stoichiometry as shown below:
[tex]m_{N_2}=3.33mol(NH_4)_2Cr_2O_7*\frac{1molN_2}{1mol(NH_4)_2Cr_2O_7}*\frac{28.01gN_2}{1molN_2}\\\\ m_{N_2}=93.3gN_2[/tex]
Best regards!
Orbital structure of sodium?
Answer:
na.
sodium
11( 2,81,)
pls Mark me as brainlest
What is the definition of molar volume?
Answer:
Occupied volume divided by the amount of a substance at a given pressure and temperature
Explanation:
Source: wikipedia
Consider the reaction:
120 (9) + 5 CO(g) -------> 5 CO2(g) +
1,(g)
0.315 moles of iodine(V) oxide, 105, reacts
with 1.00 moles of carbon monoxide, CO.
Determine the moles of le, which could
be produced?
Answer:
SOMEONE ANSWER THIS PLEASE
Explanation:
PLEASE
Identify the correct coefificients to balance it
-C3H8+O2 to -CO2 +-H2O
Answer:
[tex]{\rm 1\; C_3H_8} + {\rm 5\; O_2} \to {3\; \rm CO_2} + {4\; \rm H_2O}[/tex].
Explanation:
[tex]{\rm ?\; C_3H_8} + {\rm ?\; O_2} \to {?\; \rm CO_2} + {?\; \rm H_2O}[/tex].
Among the four species in this reaction, [tex]\rm C_3H_8[/tex] is species with the largest number of atoms per molecule. Assume that the coefficient of this compound is [tex]1[/tex].
[tex]{\rm 1\; C_3H_8} + {\rm ?\; O_2} \to {?\; \rm CO_2} + {?\; \rm H_2O}[/tex].
Number of atoms on the left-hand side of the reaction:
[tex]\rm C[/tex]: [tex]1 \times 3 = 3[/tex].[tex]\rm H[/tex]: [tex]1 \times 8 = 8[/tex].[tex]\rm O[/tex]: not found yet.By the conservation of atoms, the number of atoms on the right-hand side of the reaction should match those on the left-hand side. In this reaction, [tex]\rm CO_2[/tex] is the only product with carbon atoms, whereas [tex]\rm H_2O[/tex] is the only product with hydrogen atoms. These [tex]3[/tex] carbon atoms and [tex]8[/tex] hydrogen atoms would correspond to:
[tex]3 / 1 = 3[/tex] [tex]\rm CO_2[/tex] molecules, and[tex]8 / 2 = 4[/tex] [tex]\rm H_2O[/tex] molecules.[tex]{\rm 1\; C_3H_8} + {\rm ?\; O_2} \to {3\; \rm CO_2} + {4\; \rm H_2O}[/tex].
Number of atoms on the right-hand side of the reaction:
[tex]\rm C[/tex]: [tex]3 \times 1 = 3[/tex].[tex]\rm H[/tex]: [tex]4 \times 2 = 8[/tex].[tex]\rm O[/tex]: [tex]3 \times 2 + 4 \times 1 = 10[/tex].The number of [tex]\rm O[/tex] atoms on the left-hand side should match those on the right-hand side. In this reaction, [tex]\rm O_2[/tex] is the only reactant with [tex]\rm O\![/tex] atoms. These [tex]10[/tex] [tex]\rm \! O[/tex] atoms would correspond to:
[tex]5[/tex] [tex]\rm O_2[/tex] molecules.[tex]{\rm 1\; C_3H_8} + {\rm 5\; O_2} \to {3\; \rm CO_2} + {4\; \rm H_2O}[/tex].
3. Two liquids are being studied to find which one
evaporates more quickly. Liquid A boils at 50°C and
Liquid B boils at 25°C. Which liquid do you think
evaporates faster?
A.Liquid A
B.Liquid B
C.Both will evaporate at the same rate
D.Neither evaporate at all
Answer: D
Explanation:
Because at temerature at 25 and 50 is
to low for a compound to evaporate as gas because the bioling point is 100.
Answer: B
Explanation: Evaporation rate is influenced by the liquid's boiling temperature. A lower boilng point means that converting the liquid to a gas takes less energy because higher temperatures mean higher energy content. Assuming that this relationship holds at room temperature and that all other factors are equal, you should expect that Liquid B will evaporate faster.
Your mommy buys you a helium balloon at the circus. It has a volume of 4.00 liters at STP. What mass of helium, expressed in grams, does this balloon contain?
Answer:
i dont know
Explanation:
state the main postulates of the collision theory
Answer:
The rate of a reaction is proportional to the rate of reactant collisions:reaction rate∝(collisions/time)
The reacting species must collide in an orientation that allows contact between the atoms that will become bonded together in the product.The collision must occur with adequate energy to permit mutual penetration of the reacting species’ valence shells so that the electrons can rearrange and form new bonds (and new chemical species).Answer:
a,c,d for knewton
Explanation:
Identify Acid, Base, Conjugate acid, and base pairs in the following: HPO2 + NH" -> H-PO, + NH, Conjugate Acid ,HPO 2 Acid NH, ΝΗ, Base H PO Conjugate Base I need answers now
Answer:
no ablo inglés porfavor amigos
what is the only thing that stops gamma rays?
The Answer is LEAD ......................
How many moles of oxygen are required to react with 12 moles of FeS2?
4FeS2 + 11O2 → 2Fe2O3 + 8SO2
Now balance the chemical reaction by providing the correct coefficients:
carbon + fluorine gas yields
carbon tetrafluoride
[?] C+[?]F2 → [?]CF4
An atom starts with 20 electrons and 20 protons; after a reaction, it has 18 electrons and 20 protons.
Answer:
(+20) + (-18) = +2
Explanation:
Does this platform really work?
Answer:
Yes, it does, it helps very much :))
Explanation:
Use this equation to calculate the specific heat capacity of each metal:
cmetal =
c water = sp. heat capacity of water (4.18 J/gC)
m water = mass of the water in the cup
T water = change in water temperature
m metal = mass of the metal
T metal = change in metal temperature
What is the specific heat for the aluminum wire?
What is the specific heat for the steel wire?
What is the specific heat for the lead pellets?
Answer:
What is the specific heat for the aluminum wire?
0.82
What is the specific heat for the steel wire?
0.47
What is the specific heat for the lead pellets?
0.25
Explanation:
Answer:
What is the specific heat for the aluminum wire?
0.82
What is the specific heat for the steel wire?
0.47
What is the specific heat for the lead pellets?
0.25
Explanation:
This is the person above me. All credits go to them.
What is the total number of grams of HI in 0.500 liter of
1.00 M HI?
64.0 g
128 g
1.00 g
0.500 g
Answer:
The amount of HI is "64 grams".
Explanation:
The given values are:
Volume,
= 0.500 L
Molarity,
= 1.00 H
Molar mass of HI,
= 128
Now,
The moles of HI will be:
= [tex]Molarity\times Volume[/tex]
On substituting the values, we get
= [tex]1.00\times 0.500[/tex]
= [tex]0.5 \ mol[/tex]
hence,
The amount of HI will be:
= [tex]Moles\times Molar \ mass[/tex]
= [tex]0.5\times 128[/tex]
= [tex]64 \ grams[/tex]
Cells require a structure that regulates the transfer of material in and out of the cell. This structure is the -
cell membrane.
mitochondria.
nucleus
chloroplast
Answer:
A.) cell membrane
Explanation:
I hope I helped, have a good day
The following diagram on the left represents the copper nitrate solution in the half‑cell before the galvanic cell starts to operate. In the following diagram on the right, draw a representation of the solution in the same half‑cell after the galvanic cell has been operating for some time and is still producing a voltage.
Before reaction : 4 Cu2+ molecules and 8NO3-
Answer:
There is too much here for me to attempt in one sitting, but I will get you started and give suggestions that may help you proceed on your own.
a) As far as I can tell, you didn't provide the reduction potentials in the table below. So, I looked them up and find them to be
Cu2+ +2e- ==> Cu(s) Eº = +0.34 V
Zn2+ + 2e- ==> Zn(s) Eº = -0.76 V
Net ionic equation: Cu2+(aq) + Zn(s) ==> Cu(s) + Zn2+(aq)
b) Eºcell = 0.34 V + 0.76 V = 1.10 V
c) ∆Gº = -nFEº where n = number of electrons transferred (2) and F = 96,485 C/mol e- and Eº = 1.1 V
d) Again, there is no diagram
e) same
f) Use the Nernst equation Ecell = Eºcell - 2.303RT/nF log Q where R = 8.314; T = Kelvin; F = Faraday const. and Q = reaction quotient, i.e. products/reactants
g) the cell voltage is an intensive property. That should help you answer this part of the question
Explanation:
its not much but i hoped this helped
What about 50 g of water?
I need help what this
Answer:
3.38 Tablespoons
10.14 Teaspoons
0.21 U.S. Cups
0.18 Imperial Cups
0.20 Metric Cups
50.00 Milliliters
Explanation:
What is the empirical formula for H2SO4? Explain.
Answer: The empirical formula is H2SO4 only.
Explanation: Because it is the simplest ratio of atoms of elements in a compound.
Zinc nitrate can be produced by reacting an acid and a metal oxide.
Name the acid and the metal oxide used to produce zinc nitrate.
Acid....
Metal oxide.....
Answer:
Acid - dilute nitric acid
Metal oxide - zinc oxide, zinc hydroxide or zinc carbonate
Explanation:
Zinc Nitrate is produced by carrying out a reaction between the following metal oxides and acid
Acid - dilute nitric acid as concentrated nitric acid produces ammonium nitrate
Metal oxide - zinc oxide, zinc hydroxide or zinc carbonate
Hence the correct answer is
Acid - dilute nitric acid
Metal oxide - zinc oxide, zinc hydroxide or zinc carbonate
(iii) Explain the following statements about drugs:
a. You can be arrested by the police for possessing heroin
b.All drugs are dangerous.
Answer:
A
Explanation:
Heroine destroying the body system
The probability?????????????????
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
OV
Na
Mg
Se
Save and Frit
Answer:
Na
Explanation:
Sodium