Explanation:
About which substance you are talking?
The Half Life of Californium 252 is 5 years.
FALSE
TRUE
Explain whether chromium is more or less reactive than aluminium.
Answer: Chromium is less reactive as compared to Aluminium as it can not easily electrons as aluminium.
Explanation:
The arrangement of metals in a series according to the decreasing order of their reactivity is called reactivity series.
The metals that are placed above hydrogen are more reactive and those below hydrogen are less reactive.
A metal placed above another metal can displace lower metal from its salt solution. Thus a metal placed above in series is more reactive than metals placed below it.
As aluminium can easily lose electrons as compared to chromium , it is more reactive than Chromium.
Describe what each component of the Currents Tank Investigation represents.
In the Currents Tank Investigation,
a. the water represents
b. the sides of the tank represent
c. blowing through the straw represents
d. the moving pepper helps illustrate the movement of
1. currents
2.prevailing winds
3.the ocean
4.continents
Answer:
a. the water represents -- 3.the ocean
b. the sides of the tank represent -- 4.continents
c. blowing through the straw represents --- 2.prevailing winds
d. the moving pepper helps illustrate the movement of -- 1. currents
Explanation:
According to the amounts mentioned in the current talks investigation the ocean is represented by the water, the sides of the tanks are represented by the continents. The blowin of the straw illustrates the prevailing winds in the eastern ad western direction and the moving pepper shows the movment of ocean currents.One solution contains 14.9 g KCl in exactly 10 mL of solution. What is the molarity of the solution? molar mass KCI = 74.5 g/mol
Answer:
20
Explanation:
How does the structure of the steroid EXPLAIN the function of the steroid?
Answer:
Explanation:
Steroids have two principal biological functions: as important components of cell membranes which alter membrane fluidity; and as signaling molecules. Hundreds of steroids are found in plants, animals and fungi. All steroids are manufactured in cells from the sterols lanosterol (opisthokonts) or cycloartenol (plants).
What is plotted on the Y axis
Speed
Distance or time
3.
Violent downdrafts that are concentrated in one local area are
a. downdraft cells.
c. downbursts.
b. downstrokes.
d. updrafts.
Answer:
They are called downbursts.
13 POINTS AND BRAINIEST!!!!
How many moles of ethanol, C2H5OH are need to prepare a 25 m solution using 1200 g water?
Answer:
30 moles of ethanol are needed to prepare a 25 m solution, using 1200 g of water
Explanation:
This a short problem of solutions:
Our solute is ethanol: C₂H₅OH
Our solvent is water-
25 m, is our solution's concentration. m means molality (moles of solute contained in 1kg of solvent).
Our solvent mass is 1200g. We convert them to kg
1200 g . 1kg / 1000g = 1.2 kg
m = mol/kg → mol = m . kg
mol = 25 mol/kg . 1.2kg →30 moles
How would you prepare a 1 L solution of 3 M MgO?
Answer:
You need to measure 120.9132 grams of MgO and add to 1 liter of distilled water in a beaker.
Explanation:
Capital M stands for molarity, or moles/liter. So 3 M MgO means 3 moles per liter of MgO.
1 L × [tex]\frac{3 moles MgO}{1 L MgO}[/tex] = 3 moles MgO
This means you need to measure 3 moles MgO to put into 1 Liter of water.
But you don't know how much that is, so you need to convert moles to grams.
First you need to find how many grams are in 1 mole of MgO.
You can search the molar mass of MgO online to get: 40.3044 g
But if you don't have the internet, use the periodic table to add the masses of Mg and O: 24.305 g + 15.999 g = 40.3044 g
Then write the fraction so that the units cancel out, so you get grams by itself on the top of the fraction.
1 L × [tex]\frac{3 moles MgO}{1 L MgO}[/tex] × [tex]\frac{40.3044 g MgO}{1 mole MgO}[/tex] = 120.9132 g MgO
You need to measure 120.9132 grams of MgO and add to 1 liter of distilled water.
We will prepare 1 L solution of 3 M MgO, by dissolving 120.91 grams of MgO in 1 litre of water.
How molarity is define?Molarity is define as the no. of moles of solute dissolve in per liter if solvent or solution & it is represented as:
M = n / v
In the question, it is given that:
Molarity of MgO = 3M i.e. 3 moles of MgO is present in 1 liter of solution.
So, we have moles of MgO = 3 moles
Now, we convert moles of MgO to grams to know how much of solute is required, in the following manner:
n = W / M, where
M = molar mass of MgO = 40.30 g/mole
W = to find?
W = 3 mole × 40.30 g/mole = 120.91 grams
Hence, 120.91 grams of MgO is required.
To know more about molarity, visit the below link:
https://brainly.com/question/14469428
what is the difference between the mitochondria and the excretory system?
Answer:
Mitochondria is a membrane-bound organelle stored in cells and their function is to generate chemical energy to power the cell's biochemical reaction.
The excretory system is an organ system that eliminates wastes, prevents harmful accumulation of chemicals in the body, and maintains the body's chemical concentration.
Explanation:
Science has had no negative impacts on society. Please select the best answer from the choices provided T F
Answer:
false
Explanation:
not all science is good, or has good effects
False.
Science can possibly be dangerous when used by the wrong people. It can be used to create bombs, bioweapons, and much more.
Please mark Brainliest if this was helpful, and let me know if you have questions! :)
A gas occupies 900.0 mL at a temperature of 300K. What is the volume at 132.0 °C?
where do these all go?
Answer:
The one inside with "+"--- Protons
The grey ones inside--neutrons
The ones on the electron orbits---electron
Everything is called an atom
Explanation:
__H2 + __O2 --> __H2O
If 42.3 moles of water are produced, how many moles of hydrogen gas was reacted?
Answer:
42.3moles
Explanation:
The chemical equation given in this question is as follows:
H2 + O2 → H2O
However, this equation is unbalanced, the balanced chemical equation is as follows:
2H2 + O2 → 2H2O
This equation shows that;
2 moles of hydrogen gas (H2) will produce 2 moles of water (H2O)
Hence, If 42.3 moles of water (H2O) are produced, 42.3 × 2/2
= 42.3moles of hydrogen was reacted.
Could a copper metal container be used to store a solution of silver nitrate
Answer:
a
Explanation:
because that is .y answee
Which refers to a material that causes a wave to bounce off of it?
A) Absorber
B) Reflector
C) Conductor
D) Insulator
THE CORRECT ANSWER IS B.
#edge2021
Answer:
B: reflector
THe answer on EDG
Answer:
B
Explanation:
EDGE 2021
GIVING BRAINLIEST TO CORRECT ANSWER
Friction__
A. happens whenever work is done
B. occurs when objects rub against each other
C. releases energy as heat
D. all of the above
Answer:
B) occurs when objects rub against each other
Explanation:
Answer:
B. occurs when objects rub against each other
Explanation:
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. ... Friction always works in the direction opposite to the direction in which the object is moving or trying to move. Friction always slows a moving object down.
Gas A has a partial pressure of 6 atm. Gas B has a partial pressure of 2 atm.
What is the partial pressure of Gas C, if the total pressure of the combined
gases is 10 atm?
Answer:
2 atm
Explanation: add both partial pressures and subtract from total pressure
You have 45.2 liters of SO2. This would be equal to
grams of S02
• Use ROUNDED masses from the periodic table in your calculations
• Answer can ONLY include numbers, no units
• Answer should be 3 digits (no decimals)
Answer:
you speak spanish
speak spanish
Where do plants get their energy?
Answer: they get their energy from the sun.
Explanation:
We have observed evidence that when M-NM compounds are dissolved, the metal particles tend to form positively charged ions (cations), while non-metal particles tend to form negatively charged ions (anions).
a. True
b. False
Answer:
a. True
Explanation:
From Thomson's Plum Postulate on Pudding model of an atom, he posits that particle includes electrons that are encircled by a circle of positive charge to adjust the negative charges of electrons, which is fundamentally the same as way like negatively charged "plums" is getting encased by positively charged pudding.
Hence, the above statement is true.
Similarities between manner of death and cause of death
Answer:
The cause of death is the specific injury or disease that leads to death. The manner of death is the determination of how the injury or disease leads to death.
Explanation:
.
how many moles are contained 80.3 gram of sm(no3)3
0.239 mol Sm(NO₃)₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 80.3 g Sm(NO₃)₃
[Solve] moles Sm(NO₃)₃
Step 2: Identify Conversions
[PT] Molar Mass of Sm - 150.36 g/mol
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of Sm(NO₃)₃ - 150.36 + 3[14.01 + 3(16.00)] = 336.39 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 80.3 \ g \ Sm(NO_3)_3(\frac{1 \ mol \ Sm(NO_3)_3}{336.39 \ g \ Sm(NO_3)_3})[/tex][DA] Divide [Cancel out units]: [tex]\displaystyle 0.238711 \ mol \ Sm(NO_3)_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.238711 mol Sm(NO₃)₃ ≈ 0.239 mol Sm(NO₃)₃
the lungs are covered with a thin layer called ________
interstitium
#keeponlearning
Answer:
pleura
Explanation:
The lungs are covered by a thin tissue layer called the pleura. The same kind of thin tissue lines the inside of the chest cavity -- also called pleura.
Which of the following has the most number of atoms
Answer:
Explanation:
where is the pic?
Answer:
what are the following? if you can provide them I can try to answer it for you
Explanation:
what is Newton first law
Answer:
law of inertia hope it helps
At which point is the compound a solid?
1- F
2- G
3- H
4- I
Answer:f
Explanation:
Plz give brainlest
Which is one factor that increases the speed of a sound wave? A. higher temperature B. lower temperature C. traveling in a liquid rather than a solid D. traveling in a gas rather than a liquid
Answer: c
Explanation:
PLEASE HELP ME
2. In the cause and effect chart below, decide whether the cause makes a chemical reaction speed up or slow down. Circle the correct answer.
Answer:
speeds up, slows down, slows down, speeds up, slows down
I need a tutor!!! I really wanna learn but my professor has a language barrier. How many grams of oxygen are required to react with 2.05 g of dihydrogen sulfide?