Answers
Answer:
true
false
false
true
false
true
true
false
false
true
true
Related Questions
A student with a body temperature of 37°C holds a piece of ice that has a
temperature of -8°C.
Which statement best explains what happens?
1. Thermal energy transfers coldness from the student's hand to the ice.
2. Heat transfers coldness from the ice to the student's hand.
3. Heat transfers thermal energy from the student's hand to the ice.
4. Thermal energy transfers heat from the student's hand to the ice.
Answers
Answer:
Thermal energy transfers hear from the students hand to the ice
WILL MARK BRAINLY IF GOOD ANSWER :)
Chlorine and oxygen are both gases at room temperature. What are some characteristic properties of chlorine that distinguish it from oxygen?
Answers
Answer:
Well one characteristic is electical energy transforms into thermal energy and gases and the state of matter(one of the distinct form i which matter exist)
possible isomers of C4H9I
Answers
Answer:
there are 4 possible isomers
What is the boiling point (in °C) of a 0.743 m aqueous solution of KCI?
Enter your rounded answer with
3 decimal places.
Answers
A student measures the volume of a small irregularly- shaped stone. Which apparatus must be used? a. a measuring cylinder containing water and a ruler only. b. a measuring cylinder containing water only. c. an empty measuring cylinder and a ruler only. d. a ruler only.
Answers
Answer:
a measuring cylinder containing water only.
Explanation:
If we want to measure the volume of an irregular object. We need a properly calibrated measuring cylinder filled with water of known volume.
The irregular object is now inserted into the measuring cylinder containing water and the change in the volume of water is noted. The volume of the irregular object is now obtained as;
New volume of water - initial volume of water.
Hence, only a measuring cylinder filled with water is required to measure the volume of a small irregularly- shaped stone.
Write a balanced molecular equation describing each of the following chemical reactions.
(a) Solid calcium carbonate is heated and decomposes to solid calcium oxide and carbon
dioxide gas.
(b) Water vapor
Answers
Answer:
don't know..............
ХА
19
Which two major parts of the Earth system does this photo most clearly
show?
O A. Atmosphere
B. Biosphere
c. Cryosphere
PREVIOUS
Answers
Answer:
B. Biosphere.
Explanation:
what was the control group for this experiment?
Answers
Answer:
a
Explanation:
the rat felt the normal diet with vitamin are gain weight than the rat felt with diet
The word "atom" comes from the Greek word
Answers
Answer:
1) atomos. 2) uncuttable.
Explanation:
none
Answer is atomos
Explanation: it’s the answer trust me
Which of the following is the formula for vanadium (II) oxide? Question 11 options: A) VO2 B) VO C) V2O3 D) V2O5
Answers
Answer: A. ( VO2)
Explanation:
Answer:
B) VO
Vanadium(II) oxide is the inorganic compound with the idealized formula VO.
PLEASE HELP URGENT!!
What is the SI system? What are its benefits?
Answers
Answer:
The SI system : The international system of units.
It is a scientific method of expressing the magnitudes or quantities of important natural phenomena.
Benefits of SI system
It is a coherent system of units ( a system based on certain sets of fundamental units )It is a rational system of units ( it assigns only one unit to a particular physical quantity ) Identify any three acids.
Identify any three bases.
Answers
Sulfuric acid, hydrochloric acid, nitric acid,
Bases:
Potassium hydroxide (KOH)
Sodium hydroxide (NaOH)
Barium hydroxide (Ba(OH)2)
Where does reduction occur in an electrochemical cell?
Answers
Answer:
The cathode is the electrode where reduction takes place.
so
reduction occur in Cathode in an electrochemical cell.
Answer: Cathode
Explanation:
.
HF or HCl which can form the hydrogen bond? Explain your answer.
Answers
Answer:
can only form one hydrogen bond each
Explanation:
can only form one hydrogen bond each
calculate the number of atoms in 1g of calciumj
Answers
Answer:
It's about mass of 40.1⋅g
Explanation:
I hope this helps you out. Have a nice day!
Can someone please give me a clear definition of what ceramics are? It will really help! :)
Answers
The pots and other articles made from clay hardened by heat is called ceramics..
HOPE IT'S HELPFUL FOR U MATE!!!!
Somebody please help me with this.
Answers
Answer:
2. Chemical reactions changes occur when the bonds between atoms in a molecule are created or destroyed.
3. When you reach your its boiling point, the molecules in liquid have enough energy to become a gas.
4. When you have a solid with more than one type of compound, it is called a mixture.
5. A Crystal is a form of solid where the atoms are arranged is a very specific order.
6. If you have different types of molecules dissolved in a liquid, it is called a solution
Balance
Mg +O2
NH3+ H2SO4
H20+O2
Answers
Answer:
MgO2
H202
NH4)2SO4
Explanation:
hope this helps you
Which of the following elements will most likely not form an ion at all?
Br
Na
O
Ar
Mg
Answers
Answer:
О
because it has the fewest number of electrons
can you solve question 1 and 2.
I need it. :)
Answers
Answer:
The answer is below
Explanation:
1.
Tap water - Mixtures
Sodium - Compound
Nitrate - Compound
Rust - Compound
Distilled - Compound
Water - Compound
Paint - Mixture
Sugar - Compound
Carbon dioxide - Compound
Brine - Mixture
Apple Juice - Mixture
Petrol - Mixture
Ink - Mixture
Alcohol - Compound
____________________________________________
A) - Chromatography
B) - Fractional Distillation
C) Simple Distillation
D) Filtration
Q.1 Classify the following as mixture or compound :
MIXTURE :
Tap water Paint Brine Apple juice InkCOMPOUND :
Sodium nitrate Rust Distilled water Sugar Carbon dioxidePetrol AlcoholQ.2
Chromatography fractional distillationsimple distillation filtrationHOPE SO IT HELPS YOU
Mark me as brainliest
Can you answer Chemistry means in wide?
Answers
Answer:
Chemistry is a branch of a science which explain about study of composion properties and the transformation or change of matter.
a 20.5g sample of cleaning detergent contains 8.61g of NH40H.CALCULATE the percentage composition of nitrogen in the cleaning detergent sample
Answers
Answer:
The mass percentage composition of nitrogen in the sample of the cleaning detergent is approximately 16.78%
Explanation:
The given mass of the sample of the cleaning detergent, m₁ = 20.5 g
The mass of the ammonium hydroxide, NH₄OH in the detergent, m₂ = 8.61 g
The molar mass of NH₄OH = 35.04 g/mol
The molar mass of nitrogen, N = 14.01 g/mol
Therefore, the mass, m₃ of nitrogen, N, in 8.61 g of ammonium hydroxide, NH₄OH, is found as follows;
m₃ = (14.01/35.04) × 8.61 g = (402,087/118,800) g ≈ 3.44 g
The mass of nitrogen, N, in the ammonium hydroxide, NH₄OH, contained in the 20.5 g sample of the cleaning agent, m₃ ≈ 3.44 grams
The percentage composition of nitrogen in the sample of the cleaning detergent, %N is given as follows;
[tex]\% Composition = \dfrac{Mass \ of \ component}{Total \ mass \ of \ cleaning \ detergent} \times 100[/tex]
Therefore;
%N ≈ ((3.44 g)/(20.5 g)) × 100 ≈ 16.78 %
The percentage composition of nitrogen, %N ≈ 16.78%.
Which factors ALL increase reaction rate?
decrease temperature, stir, increase surface area, remove catalyst
none of these
increase temperature, increase surface area, add catalyst, stir
increase temperature, stir, decrease surface area, add catalyst
Answers
Answer:
increase temperature, increase surface areas, add catalyst, stir
The rate of reaction can be increased with the increase in temperature, surface area, adding catalyst and allowing stirring. Thus, option C is correct.
What is rate of reaction?The rate of reaction is given as the rate of formation of product or the rate of disappearance of reactant in unit time.
The rate of reaction can be affected with:
Increase in temperature - It will increase the collisions between the reactants, and thereby the rate.Increase in surface area - It results in increased interaction of the reactant molecules for the formation of product.Catalyst - It lowers the activation energy of the reactant, and thereby increases the rate of reaction.Stirring - It mediates the increase in the collisions and the surface area, and resulting in increased rate of reaction.Thus, the rate of reaction can be increased with the increase in temperature, surface area, adding catalyst and allowing stirring. Thus, option C is correct.
Learn more about rate of reaction, here:
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PLZ HELP What is an electron? O A.
A positively charged particle
B. An element on the periodic table
C. A negatively charged particle
D. A particle found in the nucleus SUBMIT
Answers
Answer:
C
electrons are negatively charged particles
Answer: D
Explanation:
just took the test
Need help with this
Answers
Answer:
H20is water andN20is nitrogen 4 oxide
In a hospital, bags of saline solution are used to rehydrate patients. They are made by dissolving a specific amount of salt in water. What is the solvent in the saline solution?
A. Bag
B. Patient
C. Saline
D. Water
Answers
The solvent is the liquid that the solute (salt) is dissolved in.
Water is the solvent in the saline solution. Hence, option D is correct.
What is the solute?A solute is something being dissolved, a solvent is a thing dissolving the item, and the solution is the mixture of the two items.
In a hospital, bags of saline solution are used to rehydrate patients. They are made by dissolving a specific amount of salt in water. Water is the solvent in the saline solution.
Hence, option D is correct.
Learn more about the solution here:
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A(n) _____ is a hydrocarbon in which one or more hydrogen atoms is replaced by a -COOH and a -NH2 group. aldehyde carboxylic acid alcohol amino acid
Answers
Answer:
Amino Acid
Explanation:
It's part of the Amino group, which are substituted hydrocarbons.
When NH₂ and COOH replaces hydrogens on the same carbon atom in a molecule, an Amino acid is formed.
What group is a COOH?
COOH : a Carboxylic Acid group!
what happens to rubber when hammered
Answers
Answer:
No change
Explanation:
Since rubber are elastic in nature, there's no change in it's state even if it is hammered. So, it will be in it's initial state as it was before.
what is element Na in a periodic table
Answers
Answer:
Sodium.
Explanation:
Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na.
Answer:
sodium
atomic mass 22.99
atomic number 11
period 3 group 1 1a
sodium is also an Alkali metal
Explanation:
I have a periodic table on my computer I hope I helped
what charge does an atom that has gained electrons have?
Answers
Answer:
I think it's positive charge
