Answers
Related Questions
What is the range of valence electrons that metals have?
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Use the following image to answer the following questions. A student was performing an experiment using two identical cups made of styrofoam. The student had Cup A holding water at 90℃ and Cup B holding water at 20℃. The student then put an Aluminum Bar into each cup that was touching the water. As time passed, the student noticed that the temperature of the water in Cup A and Cup B began to change. Question:
A. Predict what will happen to the temperature of the water in Cup A and Cup B after 1 hour has passed.
B. Explain and give evidence for what type of heat transfer is occurring between the 2 cups.
Whoever answers my question gets brainliest
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Answer:
The water will eventually become the same temature (A)
Some substances like chalk, duster, paper, wood, air are not found in the periodic table. why?
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Answer:
They are not pure elements, instead they are compounds, hence why they are not found on the periodic table. (Periodic table only consists of pure elements)
negative ions form when atoms _______ valence electrons.
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Answer:
Negatively charged ions are called anions, and an anion is formed when an atom gains an electron. Thus, the atom has an extra charge of electrons,
Explanation:
so it becomes negatively charged.
Negative ions (or anions) are atoms that have gained electrons.
Electrons have a negative charge so if an atom is getting more of them, it's becoming more negative.
Read that From picture and tell me the answer please
Answers
Answer:
1g Hydrogen
Explanation:
Getting to the equation:Calcium in water reacts vigorously to give a cloudy white Precipitate (compound) called Calcium hydroxide alongwith the evolution of Hydrogen gas.
[tex] \boxed{ \mathsf{Ca + H_2O \rightarrow Ca(OH)_2 + H_2}}[/tex]
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Balancing the equation:This reaction is not in it's balanced form! The number of atoms of Hydrogen on the left is 2 while that on the right is 4,I.e.,they're not equal.
Adding a 2 in front of H2O solves the problem by making the number of atoms of each element on both the sides equal.
[tex] \mathsf{Ca +2 H_2O \rightarrow Ca(OH)_2 + H_2}[/tex]
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Observations:Looking into the equation more carefully, we see:
1 atom of Calcium reacts with 2 molecules of water to give 1 molecule of Calcium Hydroxide alongwith 1 molecule of Hydrogen gas.
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Gram atomic and molecular massesMass of one atom of Calcium = it's gram atomic mass
= 40 g
Mass of one "molecule" of Hydrogen
= it's Gram molecular mass
= gram mass of one atom × number of atoms in one molecule
= 1 × 2
= 2 g
So,
according to our observation:
One atoms of Calcium gives one molecule of Hydrogen (during the particular reaction)
=> 40g of Calcium gives = 2g of Hydrogen
•°• 1 g of Calcium gives = [tex] \frac{2}{40} [/tex]
= [tex] \frac{1}{20} [/tex] g Hydrogen
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Answer:We're provided with 20g of Calcium,
=> 20g of Calcium gives = 20 × [tex] \frac{1}{20} [/tex] g H2
= 1 g H2
_______________
Hope this helps!
The atomic number equals blank of blank electrons
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Answer:
The atomic number equals number of protons and electrons
This is true when an atom is in neutral state.
How would the electron configuration of nitrogen change to make a stable configuration?
It would lose four electrons.
It would gain three electrons.
It would gain two electrons.
It would lose five electrons.
Which quantity determines how two atoms bond?
the difference in the number of valence electrons
the difference in their electronegativities
their total number of valence electrons
the sum of their electronegativities
Which statement best explains why the elements in Group 18 do not have electronegativity values?
The elements do not have electrons.
The elements are too large.
The elements have filled valence levels.
The elements have only one electron shell.
Based on patterns in the periodic table, which ion has a stable valence electron configuration?
potassium (K) with a 1+ charge
magnesium (Mg) with a 1− charge
sulfur (S) with a 1− charge
fluorine (F) with a 1+ charge
Which chemical formula represents a polyatomic ion?(1 point)
Na+
Cl–
NaCl
ClO–
Answers
The answers to the questions are as follows;
It would gain three electronsThe difference in their electronegativities.The elements have filled Valence levelspotassium (K) with a 1+ chargeClO-Question 1:
How would the electron configuration of nitrogen change to make a stable configuration?Since Nitrogen has 5 Valence electrons, it needs 3 electrons to attain it's octet configuration. As such, it gains 3 electrons.
Question 2:
Which quantity determines how two atoms bond.The quantity which determines how two atoms bond is The difference in their electronegativities.
Question 3:
Which statement best explains why the elements in Group 18 do not have electronegativity values.This is because the elements have filled Valence levels.
Question 4:
Based on patterns in the periodic table, which ion has a stable valence electron configurationThe ion which has a stable Valence electron configuration is potassium (K) with a 1+ charge
Question 5;
Which chemical formula represents a polyatomic ion?The chemical formula which represents a polyatomic ion is; ClO-
what type of reaction mechanism is operative in the conversion of 2-methyl-2-butanol into 2-chloro-2-methylbutane?
Answers
Answer:
Below
Explanation:
The reaction is a Substitution SN1 mechanism
if you are positive on the answer please help - can you see the horsehead nebula from earth - no links pls !!
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Answer:
You can but because it is almost 1500 lightyears away it appears blurry and somewhat hard to find. So the answer to your question is yes but not with the naked eye. You need a telescope lens to see it as more than a blurry spot in the sky.
Explanation:
6. Potential energy can be
transformed into kinetic energy
of force is applied to the object.
True or false?
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Answer:
true
Explanation:
because there is love in the universe and we converse in each others mind soul brain time stone
Which unit could be used to measure volume?
Need help
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Answer:
A
Explanation:
Because it milliliter and litre is used to measure volume not meter or millimeter
Balance equations practice
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Answer:
1 - B) 2 - B) 3 - A)
Explanation:
1. C3H8 + 5O2 → 3CO2 + xH2O.. Find 'X'.
A) 3
B) 4
C) 5
D) 6
2. 4Al + 3O2 → xAl2O3. Find 'X'
A) 3
B) 2
C) 4
D) 5
3. FeCl3 + 3NaOH → Fe(OH)3 + xNACl. Find 'x'
A)3
B) 4
C)5
D)6
More in Next Question...
What type of rock is in the reference image? How do you know?
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Answer:
i think it's a sedimentary rock...
reason:- these are the only rocks containing fossils
Explanation:
brainliest plz
Which traits does the western harvest mouse have that might be adaptive for the environment where it lives?
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Its tail helps it climb down the tall grasses and lets it swing from the grass like a monkey in a tree
Explanation:
Answer:
Into the adaptive Trait!
Explanation:
A student wants to calculate the heat gained of 100 grams of water in order to
calculate the specific heat of a metal in the following problem. The water is
heated from 25C to 50C when the metal is added. The specific heat of water is
4.18 J/gºC. Use Q=m xCxT*
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The quantity of heat gained to raise the temperature from 25.0°C to 50.0°C is 10,450 Joules.
Given the following data:
Mass of water = 100 gramsInitial temperature = 25.0°CFinal temperature of water = 50.0°CSpecific heat capacity of water = 4.18 J/g°CTo find the quantity of heat gained:
Mathematically, heat capacity or quantity of heat is given by the formula;
[tex]Q = mc\theta[/tex]
Where:
Q represents the heat capacity or quantity of heat.m represents the mass of an object.c represents the specific heat capacity.∅ represents the change in temperature.Substituting the values into the formula, we have:
[tex]Q = 100(4.18)(50 - 25)\\\\Q = 418(25)[/tex]
Quantity of heat = 10,450 Joules.
Read more: https://brainly.com/question/188778
What is the Golgi body made of?
O integral proteins
O large steroids
O RNA
O the same thing as the cell membrane
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Explanation:
integral proteins...nns
What part of the earth absorbs most of the sun's radiation?answers 1.The ocean. 1.The ground. 1.The clouds. 1.The lakes.
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Answer: the ground
Explanation:
The period of the vibrating string is 0.004 seconds. What is the frequency of the
standing wave?
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Answer:4
Explanation:
who is considered the father of the periodic table
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Answer:
Dmitri Mendeleev
Explanation:
Which is the Lewis structure for H3PO4?
::
i
H-Ö
0-H
ö
öz-ö-1
H
I
H
H-0–H
ô–P 6
Answers
Answer:
C. H:C:H:H
Explanation:
Follow these simple steps to correctly draw a Lewis dot structure: Add up the total number of valence electrons found in the entire compound. Draw the simple structure (skeleton structure) of the compound by connecting everything with single bonds only. Add electrons to all the noncentral atoms. Put any unused electrons on the central atom.
Give 3 physical properties common to most metals
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Answer:
What are you a 6 yo? Anyways, the most common properties are, They are good conductors of electricity, They are lustrous and They are sonorous.
How do animals and plants rely on each other in the prairie? ITS TIMED
There are many decomposers in the prairie that can be used as food sources for first-order consumers.
There is more sunlight in the prairie for plants to grow, and therefore more food sources for animals.
Second-order consumers eat the grass as their food source.
The grass in the prairie provides oxygen, while animals give off carbon dioxide gas.
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Answer:
I would assume its the last one "The grass in the prairie provides oxygen, while animals give off carbon dioxide gas."
Explanation:
The question asks how the animals and plants rely on each other
The plants provide oxygen and food for the animals, and the animals provide carbon dioxide to them.
Hope this helps :D
Someone pls help me I will make you brain
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ANSWER : I AND III
HOPE IT HELPED
13. An atom has 8 protons, 8 electrons, and 7 neutrons. What is the charge of the
atom and what type of ion is it?
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Answer:
oxygen
Explanation:
Which choice can be classified as a pure substance?
A. heterogeneous mixture
B.solution
C. Homogeneous mixture
D. compound
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Answer:
d. compound
Explanation:
compound and elements are pure substances
Which statement accurately describes the bond that forms between carbon and oxygen to create carbon dioxide
Answers
Answer:
the bond that forms between carbon and oxygen to create carbon dioxide
A polar covalent bond
What would cause a liquid to turn into a solid?
Answers
Answer:
Freezing the liquid
Explanation:
Freezing a liquid causes a liquid to become a soild.
Answer:
changing the temperature of the liquid
Explanation:
Ex. Cooking brownie batter(liquid), turns it into an edible brownie(solid). Ex. Putting water into a freezer freezes it, turning it into a solid.
Which phrase describes the thermal energy of a sample of matter?
O A. The total kinetic energy of the particles of matter
B. The kinetic energy of the slowest particles of matter
O C. The average kinetic energy of the particles of matter
O D. The temperature of the fastest particles of matter
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Answer:
O A. The total kinetic energy of the particles of matter
Explanation:
I got it right on assignment. (°ω°)
Select the correct answer.
Which is true with respect to the kinetic energy of a molecule?
ОА.
it is the lowest at low temperatures
OB.
it increases at low temperatures
Oc it is the same at all temperatures
OD. it is the lowest at high temperatures
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Which material is a heterogeneous mixture?
O A. A brass coin
B. Tap water
C. Vinegar
D. Soil
Answers
Answer:
D
Explanation:
Heterogeneous mixture is a mixture of non-uniform composition & in which the components can be easily identified
Answer:
Soil
Explanation:
Soil is made up of many things (therefore it's not pure) and does not appear to be uniform; it does not look the same throughout. Therefore it is heterogeneous.