Answer:
Acoustic survey data can help inform scientists about the locations of the rainforest with the highest biodiversity. ... By working with these companies, The Nature Conservancy can help inform them of where they might try to create wildlife corridors or connected habitats on their lands
a compound formed when atoms of two or more different elements share electrons
a compound formed when atoms of two or more different elements share electrons
This statement is true.
For Fe, its atomic number is 26 and its mass number is 56. How many neutrons does it have?
Answer:
the number of neutrons available is 30
Explanation:
Given that
The atomic number is 26
And, the mass number is 56
We need to determine the number of neutrons does it have
So, the number of neutrons is
= Mass number - atomic number
= 56 - 26
= 30
Hence, the number of neutrons available is 30
The same would be considered and relevant
If a book has a weight of 23.2 N on Earth, what is its mass?
Answer: Mass is 2,37 kg
Explanation: Weight G = mg, and g = 9.81 m/s² on Earth.
m = W/g = 23.2 N / 9.81 m/s²
Calculate the volume in L of 11.6 moles of Neon at 120 K when it has a pressure of 25.9 atm
Answer:
The volume of the gas is approximately 4.41 liters
Explanation:
The details of the data of the Neon gas are;
The number of moles of Neon gas present, n = 11.6 moles
The temperature of the sample of Neon gas, T = 120 K
The pressure of the sample of the Neon gas, P = 25.6 atm
By the ideal gas equation, we have;
P·V = n·R·T
Where;
R = The universal gal constant = 0.08205 L·atm·mol⁻¹·K⁻¹
Therefore, we get;
V = n·R·T/P
Which gives;
V = 11.6 moles × 0.08205 L·atm·mol⁻¹·K⁻¹ × 120 K/(25.9 atm) ≈ 4.4097915 L
The volume of the gas, V ≈ 4.41 L.
Which rule for assigning oxidation numbers is correct?
a.)Hydrogen is usually -1
b.)Oxygen is usually -2
c.)A pure group 1 element is +1
d.)A monatomic ion is 0
Answer:
Answer... Option B. Oxygen is usually -2; except in Peroxides
What is the pH of the solution if the [H3O+] concentration is 2.5 X 10-4 M?
HELP I'M DESPERATE! NO LINK!
Answer:
3.60
Explanation:
To calculate the pH of any solution, use the formula;
pH= -log[ concentration ] and for this case take pH= -log[H3O+]
= -log[2.5x10^-4]
therefore pH= 3.60
The idea of pH mainly applies in the determination of the nature of various solutions to the used in the chemical analysis. The correct pH must be determined in order to get accurate results. Ionic equillibria mostly involves the calculations involving pH which is normally obtained after determination of equilibrium concentrations.
Which type of circuit has more than one path?
Answer:
parallel circuit
Explanation:
Hope this is right!!
What is the pOH of a solution with [OH-] = 1.4 x 10-13?
O A. -13.15
B. 14.00
C. 12.85
D. 13.15
Answer:
C. 12.85
Explanation:
just did
Please help im testing and need an answer as soon as possible
Kaya collects the data shown in the table.
A 2-column table with 3 rows. The first column labeled Quantity has entries Voltage, Current, Resistance. The second column labeled Value has entries 6.0 volts, 0.3 Amperes, empty.
What is the resistance in the circuit?
0.05
1.8
5.7
20
Answer:
20
Explanation:
not sure please correct me if im wrong
Answer:
20
Explanation:
Got it right on time 4 learning
Iodine-131 half life 8.040 how long will it take for a 40 gram sample of iodine-131 to decay to 0.75 grams
Answer:
See explanation below
Explanation:
To get this, we need to apply the general expression for half life decay:
N = N₀e(-λt) (1)
Where:
N and N₀ would be the final and innitial quantities, in this case, masses.
t: time required to decay
λ: factor related to half life
From the above expression we need λ and t. To get λ we use the following expression:
λ = t₁₂/ln2 (2)
And we have the value of half life, so, replacing we have:
λ = 8.04 / ln2 = 11.6
Now, we can replace in (1) and then, solve for t:
0.75 = 40 exp(-11.6t)
0.75 / 40 = exp(-11.6t)
ln(0.01875) = -11.6t
-3.9766 = -11.6t
t = -3.9766 / -11.6
t = 0.34 daysCuSO4 + 2NaBr --> CuBr2 + Na2SO4 ? How many grams of CuSO4 are needed to react with 1.80 x 1024 molecules of NaBr?
Answer:
[tex]238.5gCuSO_4[/tex]
Explanation:
Hello there!
In this case, by considering the given chemical reaction, it is possible for us to calculate the required grams of CuSO4 by considering its molar mass of 159.6 g/mol, the given molecules of NaBr, the Avogadro's number and the 1:2 mole ratio between these two in order to set up the following stoichiometric set up:
[tex]1.80x10^{24}moleculesNaBr*\frac{1molNaBr}{6.022x10^{23}molecules NaBr}*\frac{1molCuSO_4}{2molNaBr} *\frac{159.6gCuSO_4}{1molCuSO_4}\\\\=238.5gCuSO_4[/tex]
Best regards!
How many moles of gallium chlorate, Ga(ClO3)3, must react in order to produce 674 kJ of energy according to the following reaction? 2 Ga(ClO3)3 à 2 GaCl3 + 9 O2 DH = - 130.4 kJ
Answer:
10.3 mol Ga(ClO₃)₃
Explanation:
Let's consider the following balanced thermochemical equation.
2 Ga(ClO₃)₃(s) ⇒ 2 GaCl₃(s) + 9 O₂(s) ΔH = - 130.4 kJ
According to the balanced thermochemical equation, 130.4 kJ of heat are released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:
674 kJ × 2 mol Ga(ClO₃)₃/130.4 kJ = 10.3 mol Ga(ClO₃)₃
Thermochemical equations are chemically balanced equations that take into account both the energy change and the physical states of all reactants and products. Energy is a reactant in an endothermic process, whereas it is a product in an exothermic reaction. Here the moles of Ga(ClO₃)₃ is 10.3 mol.
Let's consider the following balanced thermochemical equation.
2Ga(ClO₃)₃(s) ⇒ 2GaCl₃(s) + 9O₂(s) ΔH = - 130.4 kJ
According to the balanced thermochemical equation, 130.4 kJ of heat is released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:
674 kJ × 2 mol Ga(ClO₃)₃ / 130.4 kJ = 10.3 mol Ga(ClO₃)₃
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give an example for multi cellular fungi
a sac fungi, eomycota, zygomycota and chytrids are all examples :3
Select the correct structure that
corresponds to the name.
4-bromo-5-chlorocyclohexene
Answer: a
Explanation:
The greenhouse gas released into the atmosphere as a result of livestock digesting their food is called carbon dioxide
True
False
Answer:
False
Explanation:
Cows and other livestock release methane, which is a gas like Carbon Dioxide, but not the same thing, even though it does contribute into Carbon Dioxide.
Measurements of half-life make radioactive isotopes useful for
Explain why gases such as the oxygen found in tanks used at hospitals are compressed. Why must care be taken to prevent compressed gases from reaching a high temperature?
Answer:
Large amount of gas can be stored in small container.
Explanation:
They are compressed so that a larger amount of gas can be stored in a smaller container. A greater mass confined to a smaller volume makes transporting and storing of gases easier. Increasing temperature increases pressure, and the cylinders might explode.
If 36g of Al react with 34L of Oz, how many moles of Al2O3 are produced?
4Al +302 --> 2Al2O3
145 moles
0.667 moles
0.165 moles
101 moles
Answer:
.........................................................................................................................................................................................................................................................................................................................................................................................................................................................
Explanation:
If 36g of Al react with 34L of Oz, 0.667 moles of Al2O3 are produced. The correct option is b, 0.667 moles
What are moles?The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
[tex]\rm 4Al +3O_2 -- > 2Al_2O_3[/tex]
Step1- calculate the moles of aluminum
The mass of Al is 36 g
The molar mass of Al is 27
[tex]\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\rm Number\;of \;moles\;of\;Al = \dfrac{36}{27} = 1.33\;mol[/tex]
Step2- calculate the moles of oxygen
The mass of O₂ is 34 L
[tex]\rm 1 L = \dfrac{1}{22.4 }[/tex]
[tex]\rm Number\;of \;moles\;O_2= \dfrac{34}{22.4} = 1.51[/tex]
The limiting reagent is 1.33 MOL. By the rule of stoichiometry, four moles of Al produced 2 moles of Al.
[tex]\rm \dfrac{1.33}{2} = 0.665 \;moles[/tex]
Thus, the correct option is b. 0.667 moles.
Learn more about moles
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what uses a coil that is a temporary electromagnet
Answer: transformers, generators ,inductors, electric motors
Explanation:
PLEASE ANSWER!! DUE TONIGHT!! 10 POINTS!!
Find the density of a cube (to the nearest tenth) with a side of 4 cm. and a mass of 1235 grams. (You do not need to include units in your answer.)
Answer:
19.3
Explanation:
V=4^3 a^3, to find volume with sides
p= 1235/64, Mass/ Volume= Density
A solution has pH of 9 what is it?
In general, agitation causes the dissolving rate of most solutes to:
A- remain the same
B- increase
C- vary unpredictably
D-decrease
If a blender is plugged into a 128 V outlet that supplies 7.9 A of current, what amount
of power is used by the blender?
Power (P) = Current (1) times Voltage (V)
P = (0) (V)
P=?
1 =7.9A
V=128V
100 W
01011.2 w
267 W
Answer:
Power = 1011.2 Watts
Explanation:
Given the following data;
Voltage = 128 Volts
Current = 7.9 Amperes
To find the power rating;
Mathematically, the power rating of an electrical device is given by the formula;
Power = current * voltage
Power = 128 * 7.9
Power = 1011.2 Watts
When workers stop working entirely, it is called a(n)
Answer here
SUB
Answer:
Explanation:
When workers stop working entirely, it is called either a strike or retirement, depending on the circumstances under which it is done. A strike is a mass refusal of employees to work, because they are not satisfied.
Retirement on the other hand happens when the employee reaches certain age, after which he/she can leave the job and get a pension,.
all metals are minerals
a. true
b. false
Answer:
B. False is the rite answer
Which is the correct Lewis dot structure of NH2?
H-N-H
H-N-H
A.
B.
N-H-H
H-N-H
C.
D.
-H-N-H
E.
ОА А
ов. В
C C
OD D
ОЕ Е
Answer:
D
Explanation:
What is the concentration of a sodium hydroxide solution if 14.5 mL of it are exactly neutralized by 30.0 mL of a 0.500 M hydrochloric acid solution?
Answer:
1.03 M
Explanation:
Step 1: Write the balanced equation
NaOH + HCl ⇒ NaCl + H₂O
Step 2: Calculate the reacting moles of HCl
30.0 mL (0.0300 L) of 0.500 M HCl react.
0.0300 L × 0.500 mol/L = 0.0150 mol
Step 3: Calculate the moles of NaOH that react with 0.0150 moles of HCl
The molar ratio of NaOH to HCl is 1:1. The moles of NaOH that react are 1/1 × 0.0150 mol = 0.0150 mol.
Step 4: Calculate the molar concentration of NaOH
0.0150 moles of NaOH are in 14.5 mL (0.0145 L).
M = 0.0150 mol/0.0145 L = 1.03 M
What is a jet stream. in your own words but be more detailed about what you say.
(don't send a link or file)
How much Pb(NO3)2 would need to be added to 100 mL of water to make a saturated solution at 40°C.
Answer:
70g of Pb(NO3)2 would need to be added
Explanation:
As you can see in the solubility graph of lead nitrate, Pb(NO₃)₂, the solubility of this salt (That is, the maximum amount of the salt that can be dissolved in 100g of the solvent producing a homogeneous solution) is 70g in 100g of water = 70g of the salt in 100mL of water.
A saturated solution is also defined as solubility: The maximum amount of a solute that can be dissolved in a solvent.
That means:
70g of Pb(NO3)2 would need to be added
an organism that a parasite lives in or on is a
A. prey
B. host
C. consumer
D. prey