2NaHCO3 + 3CaCl2 → CaCO3 + 2NaCl + H2O + CO2
Which statement is true about the equation above?
There are 3 chlorines on the reactant side and 3 chlorines on the product side of this equation.
There are 3 chlorines on the reactant side and 3 chlorines on the product side of this equation.
There are 3 calciums on the reactant side and 2 calciums on the product side of this equation.
There are 3 calciums on the reactant side and 2 calciums on the product side of this equation.
There are the same number of oxygen atoms in the reactants and the products. There are the same number of oxygen atoms in the reactants and the products.
This equation does not follow the law of conservation of mass.
Answer:
There are the same number of oxygen atoms in the reactants and the products
Explanation:
However the equation is not balanced
3 Ca on one side and 1 on the other
An alloy of sodium and potassium is used as a coolant due to its
A.high thermal conductivity
B.physical state
C.high reactivity
D.all except c
Answer:
A
Explanation:
Because It's dense meaning that it doesn't burn
Explanation:
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How can you tell if two objects are in thermal equilibrium?
The objects have the same temperature.
The objects are touching each other.
The objects' temperatures are changing.
The objects are the same size.
Answer:
Two objects are in thermal equilibrium if they are in close contact that allows either to gain energy from the other.
Answer: The Objects have the same temperature
Explanation: i just took the test
Ella is interested in combining substances to form a new material.
She read about some of the products chemists have discovered. She learned that sometimes synthetic materials are created accidentally. For instance, a chemist working on plastic gun sights synthesized a very sticky material accidentally. Which product had he accidentally made?
A. a coil spring toy
B. a heavy-duty adhesive glue
C. a new sweetener
D. a non-stick surface
please hurry
PLEASE HELP ILL DO WHATEVER Bryan is doing a triathlon and you need to calculate his average speed for all three events. He swims 1km in 0.4 hrs. He rides his bike 50km in 1.5hrs and he runs 10km in 0.7 hrs.
Answer:
toda
Explanation:
:todo lo que tienes que hacer es hacer la cosa
Answer:
16.6km/h
Explanation:
Speed is distance/time.
speed for 1st event = 1/0.4 = 2.5km/h
speed for 2nd event = 50/1.5 = 33.3 km/h
speed for 3rd event = 10/0.7 = 14.28 km/h
Average speed = 2.5 + 33.3 + 14.28 /3 = 50/3 = 16.6 km/h
What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?
Answer:
When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.
If excess sodium sulfate react with 36 g of iron (III) phosphate and produce a 65.0% yield of sodium phosphate, how many grams of sodium phosphate are actually produced?
[tex]Na_2SO_4 + FePO_4[/tex] -> [tex]Na_3PO_4 + Fe_2(SO_4)_3[/tex]
Answer:
According to the stoichiometry, the theoretical yield is 11.5 grams. Multiplying this by 0.650, you get 7.48 grams.
Explanation:
Find the mass of 2 moles of:
1. Oxygen atoms
2. Oxygen molecules
Answer: 1. 2 moles of oxygen atoms = 32 grams
2. 2 moles of oxygen molecules = 64 grams
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.
1 mole of oxygen atom (O) weighs = 16 g
Thus 2 moles of oxygen atom (O) weighs = [tex]\frac{16}{1}\times 2=32 g[/tex]
Also 1 mole of oxygen molecule [tex](O_2)[/tex] weigh = 32 g
Thus 2 moles of oxygen molecule [tex](O_2)[/tex] = [tex]\frac{32}{1}\times 2=64 g[/tex]
Which is the correct formula for the ionic compound that results from these two atoms? PLS HELP!!!
Answer:
If I am not wrong is C x2y5
Explanation:
The concept of valency is used here to determine the formula of the ionic compounds. The number of valence electrons in 'X' is 2 and that of 'Y' is 5. The formula is X₃Y₂. The correct option is D.
What is an ionic compound?The crystalline solids which are formed by neatly packed ions of opposite charges are defined as the ionic compounds. These compounds are formed by the combination of metals with non-metals.
The combining capacity of an element is given by valency. The elements belonging to the same group have the same valency. It is related to how many electrons are in the outer shell.
Here the number of valence electrons in 'X' = 2
The number of valence electrons in 'Y' = 5
The element 'X' need 6 electrons to attain the octet and 'Y' needs 3 electrons to attain the octet.
X - 6
Y - 3
The formula of the ionic compound is X₃Y₂.
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3. What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?
When the Zebra arrived they ate all the food in the area leaving Unionid numbers to decline and die as they have no food to eat.
7. Cecilia puts two magnetic toy trains very close to each other on a track. What will happen next, and
why.
If you have 4 moles of barium hydroxide, how many moles of oxygen atoms do you
have?
Answer:
8 moles of oxygen.
Explanation:
The chemical formula for barium hydroxide is Ba(OH)₂
This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.
4 moles of Ba(OH)₂ will have 8 moles of oxygen.
The number of moles of oxygen atoms we have in the compound is 8 moles .
The chemical equation for barium hydroxide is as follows:
Ba(OH)₂
According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.
Therefore, 4 moles of the compound can be represented as follows;
4 Ba(OH)₂
This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.
Therefore, we have 8 moles of oxygen atoms or 4 moles of oxygen molecules.
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What is the formula for the stable binary ionic compound formed between Barium and Oxygen?
A BaO
B. Ba2O2
CBaO2
D. Ba2O
Answer: a. BaO
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here element barium is having an oxidation state of +2 called as [tex]Ba^{2+}[/tex] cation and [tex]O^{2-}[/tex] is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]BaO[/tex]
A chemical reaction takes place in a closed system. The mass of the reactants before the reaction was 35 grams. What must the mass of the products of the reaction be, according to the law of conservation of mass?
(science)
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A person who is physically addicted to and emotionally dependent on alcohol has the disease called___________.
a. alcoholitis
b. osteoporosis
c. alcoholism
d. Parkinson's
Answer:
C
Explanation:
Alcoholism is the inability to control drinking due to both a physical and emotional dependence on alcohol.
What happens to the number of valence electrons as you move from element 1 to element 18 on the periodic table?
A)the number of valence electrons decreases
B)the number of valence electrons decreases then increases in a predictable sequence
C)the number of valence electrons increases
D)the number of valence electrons increases then decreases in a predictable sequence
Answer:
C
Explanation:
Answer: The answer is C
Explanation:
how do we know that all the continents were all together at one point in time. writing prompt and it has to be at least 7 sentences
Answer:
We can tell by how the continents look. Scientists who propose the pangea theory have said this. You can see for yourself because all the continents look like puzzle pieces you could put together. Scientists can also tell from the species. For example, let's say a scientist found a bone of a creature at the edge of a continent, the edge of another would have the same species. They have also calculated that the continents in itself are still splitting apart, but very slowly. The reason they split up was because tectonic plate movements.
Passenger airplanes take off in the troposphere but can eventually move into
the stratosphere. The planes may remain in the stratosphere until it is time to
land. Why do you think planes fly in the stratosphere?
What’s the answer????
Answer:
1. C
2. A
3. A
Explanation:
1. How are atoms held together? What is the attraction between?
Answer:
the atom is held together by the electrostatic attraction between the positively charged nucleus and the negatively charged electrons surrounding it, the stability within chemical bonds is also due to electrostatic attractions.
Explanation:
Answer:
Some type of bond (example: hydrogen bonds between water)
Polarity can also hold atoms together
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You live near the ocean and your friend lives further inland. Based on this, what can you say is most likely different about the climate in your area from your friend's area in the winter?
Your friend has colder winters than you do.
Your friend has warmer winters than you do.
You have less precipitation than your friend does.
You get more sunshine in the winter.
Answer:
I'm thinking its "Your friend had colder winters than you do."
Explanation:
It is not "Your friend has warmer winters than you do." Or "You Have less precipitation than your friend does." I was doing this quiz before that had this question and its not those.
In the ocean side the the winter will be colder by the ocean breeze in the day time. The location of your friend farther from the ocean will have warmer winters than you.
What is sea breeze ?Any wind that flows from a big body of water onto or onto a landmass is called a sea breeze or an onshore breeze. Sea breezes form as a result of changes in air pressure brought on by the different heat capacities of water and dry land. Sea breezes are therefore more confined than prevailing winds.
A sea breeze is frequently seen along coasts after sunrise because land warms up far more quickly than water does when exposed to solar radiation. While dry ground also cools faster than water, a land breeze or offshore breeze has the opposite effect.
In winter seasons, along with the sea breeze make the climate more colder than that in locations farther from oceans. Hence, option b is correct.
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What are high tides caused by
Answer: the moons gravitational force
Explanation:
What’s the answer???
Answer:
Well I know that the first one is true.
Explanation:
Answer:
1. TRUE
2. FALSE
3. C
Explanation:
Due in 5 mins!!!! Pls hurry
Which of the following would be the best example of potential energy?
A racecar moving at 120 miles per hour around a track.
a bullet shot out of a gun
a rollercoaster at the bottom of the first hill
a rubber band stretched to its fullest length right before someone lets it go
Answer:
D because it is in a fixed position
6HCl(aq) + 2A1)
-
3H2(g) + 2AlCl3(aq)
1. How many moles of hydrogen are produced from 1.20 moles of aluminum?
Answer: 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
The balanced chemical reaction is:
[tex]6HCl(aq)+2Al(s)\rightarrow 3H_2(g)+2AlCl_3(aq)[/tex]
According to stoichiometry :
2 moles of [tex]Al[/tex] produce = 3 moles of [tex]H_2[/tex]
Thus 1.20 moles of [tex]Al[/tex] will produce=[tex]\frac{3}{2}\times 1.20=1.80moles[/tex] of [tex]H_2[/tex]
Thus 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.
How many molecules are there in 3.20 grams of NH4SO2
Answer:
0.0389757845886336
Explanation:
What is Hg2Cl2 empirical formula?
Answer:
Mercury chloride's(HgCI2) empirical formula is HgCI.
Explanation:
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How would you describe boiling point?
Answer:
Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. Water at its boiling point.
Explanation:
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