Answers
Answer:
1. A
2. C
Explanation:
Answer:
there are 3 elements in question 1 and 4 atoms in question 2
Explanation:
Related Questions
CO2 is a ____________________
Group of answer choices
1.compound
2.element
3.mixture
4.solution
Answers
Answer:
CO2 is a compound
hope it helps
What type of mass movement has materials that move in a single mass or block
Answers
Answer:
The correct answer is slump
Explanation:
slump, which occurs when rock and soil slide quickly down a steep slope. Such mass movement is common where road builders have cut highways through hills or mountains.
Answer:
slump
Explanation:
2021 edge
A solution is made by dissolving
3.60 g of sodium chloride in water to
a final volume of 115 mL solution.
What is the weight/weight % or
percent by mass of the solute?
Use 1.00 g/mL for the density of the solution.
Answers
Answer: 3.13%
Explanation:
Answer:
3.13
Explanation:
:)
What volume do 4.96 moles of O2 occupy at STP?
Answers
Answer: Step 1: List the known quantities and plan the problem. Known. 4.96 moles O2; 1 mol = 22.4
Explanation: I hope that helped.
(b)Calculate the number of moles of CuSO4 that were in the impure sample of CuSO4(s) .
(c) In addition to the number of moles of CuSO4 calculated in part (b) , what other quantity must be measured in order to calculate the mass percentage of CuSO4 in the impure sample of CuSO4(s) ?
Need help now
Answers
Answer:
The questions are incomplete
Explanation:
(b) This question is incomplete. However to calculate the number of moles of CuSO₄ present in the impure sample. The formula below can be used;
number of moles = mass of CuSO₄ present in the impure sample ÷ molar mass of CuSO₄
(c) This question is also incomplete. However, to calculate the mass percentage of CuSO₄ present in the impure sample of CuSO₄, the formula below can be used.
Mass percentage of CuSO₄ =
mass of CuSO₄ present in the impure sample/mass of impure CuSO₄ × 100
Thus, the mass of the impure sample must be measured also since the actual mass of the CuSO₄ present in the impure sample must have been measured before calculating the number of moles.
Knowing the gravity on the moon is 1.6m/s what is your weight?
Answers
calculate the mass of sodium trioxocarbonate(iv) produced by the complete decomposition of 16.8g of sodium hydrogen trioxocabonate(iv)
Answers
Answer:
question for you how does this app work old tell me
2 moles or 168 g of sodium hydrogen trioxocarbonate produce 106 g of sodium trioxocarbonate. Thus 16.8 g of sodium hydrogen trioxocarbonate will produce 10.6 g of sodium trioxocarbonate.
What is decomposition?Decomposition is a type of chemical change in which the a compound decompose or break into its constituent compounds or molecules.
The decomposition of sodium hydrogen trioxocarbonate is written as follows:
[tex]2NaHCO_{3} \rightarrow Na_{2} CO_{3} + H_{2}O +CO_{2}[/tex]
According to this equation 2 moles or 168 g of sodium hydrogen trioxocarbonate produce 106 g or one moles of sodium trioxocarbonate. Molar mass of sodium bicarbonate is 84 g thus 2 moles are 168 g.
Thus, the mass of sodium trioxocarbonate formed from 16.8 g of sodium hydrogen trioxocarbonate is calculated as follows:
mass of product = 16.8 × 106 /168 g
= 10.6 g.
Hence, Thus 16.8 g of sodium hydrogen trioxocarbonate will produce 10.6 g of sodium trioxocarbonate.
To find more about decomposition reactions, refer the link below:
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In order for sodium to have 8 valence electrons it would need to either gain _____ electrons or lose _____ electron.
Answers
Answer:
7
Explanation:
sodium has 1 valence electron because of its place on the periodic table. a trick to use is included in the picture below to find out how many valence electrons an element has. to get from 1 to 8 we add 7.
I hope this helps :))
An element found in groups 3-12 of the periodic table is classified as a[n]
Answers
Answer:
Transition Metals
Explanation:
Hope this helped :)
An element X that has 15 protons and 15 electrons, loses three
electrons to form an ion.
What will be the charge on the ion?
What will be the number of protons and electrons in the ion?
Answers
Answer:
+3
12 electrons and 15 protons.
Explanation:
The element having 15 electrons and 15 protons have atomic number 15. We know that when an atom lose or gain the electron ions are formed.
Anion formation:
Anion is formed when electron is accept by an atom.
X + e⁻ → X⁻
Cation formation:
Cation is formed when electron lose be an atom.
X → X⁺ + e⁻
The given atom loses 3 electrons thus oxidation number will be +3 and cation is formed.
X → X³⁺ + 3e⁻
Now element X have 15 protons and 12 electrons.
20 points. ASAP!
So u separated Sand and salt from a mixture through evaporation and filtration. Now what is your observations and decision?
Answers
Answer:
When two or more substances, that do not react chemically, are blended together,
the result is a mixture in which each component retains its individual identity and
properties.
The separation of the components of a mixture is a problem frequently encountered
in chemistry. The basis of the separation is the fact that each component has a
different set of physical and chemical properties. The components are pure substances
which are either elements or compounds. Under the same conditions of pressure and
temperature, the properties of every sample of a pure substance are identical. Each
sample melts at the same temperature, boils at the same temperature, has the same
solubility in a given solvent, etc.
How are zinc and sodium alike?
A.they are both solids at room temperature.
B.they have the same hardness at room temperature.
C.they have the same boiling point.
D.they have the same color.
Answers
Answer: both are solid at room temperture
Explanation:
Answer:
A
Explanation:
Ajay bought bottle that was labelled as distilled water. He suspected it to be tap water. What test he could use without adding any chemical in it to find out for sure?
Answers
Answer:
Ajay should pass electric current through the water and connect a bulb to the circuit. If the bulb glows, it means that the water is tap water or else, it is distilled water.
Explanation:
This is because tap water contains little impurities like ions of some salts etc., which help in the conduction of electricity. But, distilled water is pure water and doesn't have any ions present in it. So, it doesn't conduct electricity.
Hope this helped
Ajay can test the distilled water by performing the electricity conduction test.
Distilled water has been the water that has an absence of ions and electrolytes. It has been a poor conductor of electricity.
The tap water has been constituted with minerals, electrolytes, and impurities, which results in the addition of conductivity to the water.
To test whether the water has been distilled or not, the circuit test can be performed The water has dipped wires connected with a battery and a bulb. the distilled water is a poor conductor did not allow the bulb to glow. However, with tap water bulb glow.
Thus, to test the water to be distilled or tap, the electricity conduction test has been performed.
For more information about distilled water, refer to the link:
https://brainly.com/question/2403536
If lamp 1 is unscrewed from its holder, what will happen to lamp 2 and why?
Answers
Hope it help
Mark me as brainliest
explain the coin and feather experiment. what conclusion can be drawn from experiment
Answers
In a vacuum, the objects fall at the same rate independent of their respective masses. That means coin and feather both reach the ground at the same time in a vacuum. Larger objects experience more air resistance than smaller objects. Also, the faster an object falls, the more air resistance it encounters.
Note:
hope this helps
Heat being transferred from a hot pan to our food while cooking is an example of... *
conduction
convection
radiation
transpiration
Answers
A.conduction i hope it helps
Answer:
conduction
Explanation:
The purpose of copper chloride and water. Please answer !!!!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!!!!
Answers
A bond in which two atoms share a pair of electrons is a ionic bond or covalent bond or metallic bond?
Answers
Answer:
Covalent
Explanation:
Ionic gives or takes electrons
Metallic isn't really a "type" of bond
What are the criteria for purity
Answers
Answer:
melting and boiling points
Explanation:
The technique for determination of melting and boiling points will also be described in this unit. Pure solid and liquid compounds possess sharp melting and boiling points. Therefore, melting and boiling points of a compound
i need to know what word goes into that the words are in each sentence plz help me i will give brainliest thank you :)
Answers
Answer:
im taking these points baby lol
Explanation:
i love you <3
decrease in vapour pressure will cause?
A. an increase in boiling point
B. a decrease in boiling point
C. no effect
Answers
Answer:
A. an increase in boiling point
Explanation:
A decrease in vapor pressure will cause an increase in the boiling point of a substance.
An increase in vapor pressure will decrease the boiling point.
Vapor pressure is a measure of the tendency of a liquid to change into gaseous form. The boiling point is the temperature at which the vapor pressure equals the atmospheric pressure. When vapor pressure reduces, there would be an elevation of the boiling point. This is why pressure cookers causes water to boil faster because they lower the boiling point.Plz I need help is the 2nd time I post this
Answers
Answer:
2--->C
6---->E
3---->D
4--->A
5--->B
1---->F
Explanation:
I think so, sorry if its wrong.
Help fast... thanks I’ll give you brainliest
Answers
Answer:
Graph E matches description 3 (the car is accelerating).
Explanation:
When the graph increases, the line is turned up (graph E). So when something accelerates, it is going to increase. In this case, it would increase by speed.
What does one mole of H2O correspond to?
A.
6.02 × 1023 molecules of H2O
B.
6.02 × 1023 atoms of H and 6.02 X 1023 atoms of O
C.
6.02 × 1023 atoms of O
D.
6.02 × 1023 atoms of H
E.
6.02 × 1023 × 2 atoms of H
Answers
Answer:
Its A
Explanation:
Just took the test and got a 100%
can someone tell me the answer
Answers
How many atoms are in 2.12 moles of C₂H₆
Answers
Answer:
1.28 x 10²⁴atoms
Explanation:
Given parameters:
Number of moles of C₂H₆ = 2.12moles
Unknown:
Number of atoms = ?
Solution:
A mole of a substance is used to quantity the number of atoms or other particles in a substance.
1 mole of a substance = 6.02 x 10²³ atoms
To solve this problem;
2.12 moles of the C₂H₆ will contain 2.12 x 6.02 x 10²³ atoms
= 1.28 x 10²⁴atoms
Which of the following contains the most atoms?
24.305 g Mg
39.098 gk
21.62 g B
9.0122 g Be
Answers
Explanation:
9.0122 g be Maybe, sorry i don't think so
In the above , the sample of B 21.62 g of boron contains the most atoms because it has approximately 2 moles, while the other samples have only 1 mole each.
What is atomsThe molar mass of each element can be found on the periodic table.
The molar mass of Mg (magnesium) is about 24.305 g/mol.The molar mass of K (potassium) is about 39.098 g/mol.The molar mass of B (boron) is approximately 10.81 g/mol.The molar mass of Be (beryllium) is about 9.0122 g/mol.To calculate the number of moles in each sample, we divide the mass of each sample by its respective molar mass:
For Mg: Number of moles = 24.305 g / 24.305 g/mol = 1 moleFor K: Number of moles = 39.098 g / 39.098 g/mol = 1 moleFor B: Number of moles = 21.62 g / 10.81 g/mol ≈ 2 molesFor Be: Number of moles = 9.0122 g / 9.0122 g/mol = 1 moleTherefore, the sample with 21.62 g of boron (B) contains the most atom
Read more about atoms here:
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True or False: There are more air particles in a closed syringe when the air is compressed.
Answers
....................
Please give me biran
What are the four most important elements on earth?
hellum
carbon
water
nitrogen
O oxygen
hydrogen
Answers
Answer:
These four atomic elements are oxygen, carbon, hydrogen, and nitrogen.
Explanation:
hope it helps....
Answer:
Nitrogen/Carbon/Oxygen/Hydrogen
Explanation:
I believe those would be the most important because:
Nitrogen - Composing 78% of earths atmosphere.
Carbon - Building blocks for all known life.
Oxygen - We breath it as well as it composes 21% of our atmosphere.
Hydrogen - Makes up a bunch of compounds (like water) that enable humans to live.
Which of these is a molecular ingredient that could be used in a wall-filling material ?
C6H6
Na6Ba6
NeNa
HCl
Answers
Answer:
C6H6 is the appropriate answer.
Explanation:
Answer:
c6h6
Explanation:
