Answer:
21. A to m i c number
22. P o l o n i u m
23. N e p t u n i u m -239, I don't know the second one
24. U r a n i n i t e
25. M a n h a t t a n Project
Explanation:
These are just my guesses, So some of them might not be correct.
Where is carbon dioxide and oxygen exchanged at capillaries?
Answer:
Gas exchange takes place in the millions of alveoli in the lungs.
Explanation:
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Draw a model to represent the physical property of metals known as ductility, or the ability to be drawn into a wire.
The model that represents the physical property of metals known as ductility can be seen in the image attached below.
Metals are substances that are good conductors of heat and electricity.
The term ductility is a characteristic of metal and it explains the ability of metals to be drawn into wire. it implies that metal materials can be hammered and beaten into tiny sheets of wires.
The model in the image attached below shows how gold which is metal is drawn into wires.
Learn more about metals here:
https://brainly.com/question/25090336?referrer=searchResults
2) Check all that apply.
What are the three major groups of elements?
Answer:
metals, nonmetals and metalloids
Explanation:
How many molecules are present in 0.93 grams of Fe2O3?
Answer:
5.8125*10^-3
the moles in Fe2O3 are 0.93/(56*2 + 16*3) = 5.8125*10^-3
___________ mL = 2.2 L
Answer:
2,200 mL I believe it is.
Answer:
2,200 is the answer of your question
A bond between two iodine atoms would have what as the percent ionic character
A. 53%
B. 83%
C. 0%
D. impossible to calculate
Answer:
Your answer should be 53%
I'm very sorry if I'm wrong I have not done this in forever
Explanation:
No explanation
Bubbles are released when nitric acid is added to a potassium carbonate solution.
What is the net ion
What is a controlled variable
Answer:
The part of the experiment that is set to compare data
Explanation:
The controlled variable is what stays constant throughout an experiment. You use the controlled variable to compare the new data to see what happened during whatever reaction you could say.
Directions Solve the given problem below by showing the following:
I ELECTRONIC CONFIGURATION
2. LED structure
GIVEN: Magnesium (Mg) and Oxygen (180).
Explanation:
(a). Write down the electronic configuration of (i) magnesium atom, and (ii) magnesium ion, <br> (At No. of Mg=12) ,brgt (b). Write down the electronic configuration of (i) sulphur atom, and (ii) sulphide ion. <br> (At. No. of S=16).
BRAINLIEST!!
Of the following elements, which one would have the LOWEST
electronegativity? *
Potassium (K, atomic #19)
Hydrogen (H, atomic #1)
Cesium (Cs, atomic #55)
Sodium (Na, atomic #11)
Explain please:))
Answer:
Cesium
Explanation:
cuz i looked at the chart from highest to lowest
define Common ion effect
PLS HELP!!! i have no idea what this could be
Answer:
121.5g
Explanation:
from the equation:
2mol of Al react to give 3 mol of Zn
i.e 81g of Al will give 3×81/2 = 243/2 = 121.5g
Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients. H2(g)+P4(s)=4PH3(g)
Answer: 6H2+P4–>4PH3
Explanation:
What is the manipulated variable, responding variable, and controlled Variable
observe different electrolytes in a wet cell that will light a
bulb most brightly.
Answer:
Manipulated/independent variable- DIFFERENT ELECTROLYTES
Responding/dependent variable- BRIGHTNESS OF BULB
Controlled variable- WET CELL
Explanation:
The independent variable, also known as manipulated variable is the variable that the experimenter changes or manipulates in an experiment. In this case where different electrolytes are observed to see which will light a bulb most brightly, the manipulated variable is the DIFFERENT ELECTROLYTES.
Dependent or responding variable is the variable of an experiment that responds to the changes made to the independent variable. It is the variable that is being measured in an experiment. In this case, the BRIGHTNESS OF BULB is dependent on the electrolyte used, hence, it is the responding variable.
Controlled variable or constant is the variable that the experimenter keeps the same throughout the experiment. In this case, the WET CELL is kept constant for all the electrolytes used i.e. it is not changed, hence, the WET CELL is the controlled variable.
Name the bond between atoms that share electrons
What is a molecule
Give five examples of molecular elements
Draw a diagram to show the bonding in
Carbon dioxide Methan
hydrogen chlorine
Answer:
1) Covalent bond, in chemistry, the interatomic linkage that results from the sharing of an electron pair between two atoms. The binding arises from the electrostatic attraction of their nuclei for the same electrons.
2)A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.
3)Hydrogen (H2), oxygen (O2), and chlorine (Cl2) molecules, for example, each contains two atoms. Another form of oxygen, ozone (O3), has three atoms, and sulfur (S8) has eight atoms. All elemental molecules are made of atoms of a single element.
Explanation:
PLEASE MARK ME AS BRAINLIEST
how does the air move in a land breeze?
Answer:
The air over the ocean is now warmer than the air over the land. The land loses heat quickly after the sun goes down and the air above it cools too
Explanation:
Why do engineers use metals in making
electrical wires
Answer:
Why is copper used for most electrical wiring? All metals have some amount of resistivity to electrical currents, which is why they require a power source to push the current through. The lower the level of resistivity, the more electrical conductivity a metal has
Does this particle diagram represent an element, compound, or mixture?
Answer:
Yes, it's a mixture as more than 1 type of molecules are present!!
1. A 4.00 L sample of air at 35 degrees C expands to 5.50 L when heated. What is
the new temperature, in degrees Celsius, of the air
Answer:
150.5 °C
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 4 L
Initial temperature (T₁) = 35 °C
Final volume (V₂) = 5.5 L
Final temperature (T₂) =?
Next, we shall convert 35 °C to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = 35 °C
Initial temperature (T₁) = 35 °C + 273
Initial temperature (T₁) = 308 K
Next, we shall determine the final (i.e the new) temperature of air. This can be obtained as follow:
Initial volume (V₁) = 4 L
Initial temperature (T₁) = 308 K
Final volume (V₂) = 5.5 L
Final temperature (T₂) =?
V₁ / T₁ = V₂ / T₂
4 / 308 = 5.5 / T₂
Cross multiply
4 × T₂ = 308 × 5.5
4 × T₂ = 1694
Divide both side by 4
T₂ = 1694 / 4
T₂ = 423.5 K
Finally, we shall convert 423.5 K to celsius temperature. This can be obtained as follow:
T(°C) = T(K) – 273
T₂ = 423.5 K
T₂ = 423.5 – 273
T₂ = 150.5 °C
Thus, the new temperature of the air is 150.5 °C
What is the approximate value of the equilibrium constant K P for the change C 2 H 5 OC 2 H 5 ( l ) ⇌ C 2 H 5 OC 2 H 5 ( g ) at 25 ° C. (The equilibrium vapor pressure for this substance is 570 torr at 25 ° C.) 760 torr = 1 atm R = 0.0821 L * atm / (mol * K)
Answer:
Kp for this equilibrium ≅ 570
Explanation:
This is a situation where we have an heterogeneous mixture.
We get gas from liquid state:
C₂H₅OC₂H₅ (l) ⇌ C₂H₅OC₂H₅ (g)
In order to determine Kc → [C₂H₅OC₂H₅ (g)], in equilibrium
Liquid or solid do not count for Kc, neither Kp
Kp → Partial pressure of C₂H₅OC₂H₅ (g)
Kc or Kp at equilibrium do not depend on the amount of liquid, there is; although it cannot be null since otherwise there would be no reaction.
Kp for this equilibrium ≅ 570
(Value for partial pressure in the only gas).
In order to determine Kc we can replace data at this formula
Kp = Kc (R . T)^ ⁽ⁿ ⁻ ⁿ°⁾
Where n - n° is the difference between the moles of produced gas. We only have 1 mol.
Kp = Kc (298K . 0.082)¹
570 Torr / (298K . 0.082) → Kc
Name the two minerals involved in the formation of wollastonite
What happens during the rock cycle?
True or False: Inertia is an object's resistance to change *
Answer:
True? I think.........
What is the correct hybridization for a ion of IF6 that has a charge of (1-)
Answer:
6 F atoms at 6 corners
Explanation:
The shape of IF6 (-1) is trigonally distorted octahedron. The central iodine atom has 7 valence electrons. It gains one electron from negative charge. Out of 8 electrons, 6 are imvolved in formation of 6 I - F bonds and one lone pair of electrons is present. 6F atoms are present at 6corners of distorted octahedron. The lone pair of electrons distorts the octahedral shape due to electron repulsion.
How many elements are in (NH4)3PO4
Answer:
4
Explanation:
There are 4 different elements in the compound (N, H, P, O) but if you want to count the number of each element then the answer is different.
In NH4, theres 1 N and 4 H, but since there are 3 NH4s then u have 3 N and 12 H. There's 1 P and 4 Os as well.
Added together u have 3 + 12 + 1 + 4 = 20 elements in total.
hope this helps!
How is the earth's crust different from the mantle?
A : The crust is deeper below Earth’s surface than the mantle
B : the crust is less dense than the mantle
C : the crust contains softer rock than the mantle
D : the crust is made of more iron than the mantle
( this is science by the way )
Answer:
the answer is B
Explanation:
please tell if correct or not and can you give brainliest
Answer:
well i would say D
Explanation:
the crust in fact does have more iron within in it but if i describe it more i would say the crust is a smaller amount then the mantle, and that its a bit harder material then the mantle itself
What do tissues working together
form?
Organs
Organ systems
Answer:
tissues working together form organs.
The answer is organs.
Explanation:
cells form tissues, tissues form organs, and organs that fulfill related functions make up the organ system...hope this helps(:
Abel was running a fever of 107 degrees Fahrenheit, what was her temperature in degrees
Celsius?
which of these has 170 degree in fahrenheit and
Answer:
we know the formula to convert Fahrenheit to Celsius =(F-32)(5/9)
=(107-32)(5/9)
=(75)(5/9)=375/9=41.6degree Celsius
Please help me with this thank you
Imagine a foreign mountain lion species is introduced into the ecosystem. How will it affect the other organisms?
Answer:
if a foreign lion species is introduced into the ecosystem then it can affect the ecosystem in anyway...
Explanation:
because there are chances that the lion might substitute the other predators present in that region.there are chances that the ecosystem may maintain the equillibrium.
HOPE IT HELPS PO(◍•ᴗ•◍)❤