Answer:
carbon dioxide I beleive.
Explanation:
dry ice is frozen liquid carbon dioxide and when it melts it gives off carbon dioxide gas.
To investigate the reactivity of metals a student uses four metals. Each time they added 1 g of the metal to 25 cm³ of sulfuric acid and record the temperature change. Identify the control variables in this example
Answer:
Volume of the sulfuric acid (25cm³), same mass of each metal (1g)
Explanation:
In an experiment, the CONTROL VARIABLE also known as constant is the variable that is kept unchanged for all groups in an experiment. This is done in order not to influence the outcome of the experiment.
In this case, students are trying to investigate the reactivity of four different metals. They added 1 g of each metal to 25cm³ of sulfuric acid and recorded the temperature change. Based on the explanation of control variable above, the VOLUME OF SULFURIC ACID (25cm³) and the MASS OF EACH METAL (1g) are the CONTROL VARIABLES because they are the same or unchanged in this experiment.
I will need help plz thank you
The Earth's surface is _____ water.
50 %
71 %
97 %
Answer:
71%
Explanation:
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?
A The force of the air resistance on the moving hammer
B The force of the person using the hammer
C The force of gravity pulling down on the hammer
D The force of the nail pushing in the opposite direction
Answer:
A
Explanation:
In simple terms: Hammer goes one way, air goes the other way.
Answer:
d
Explanation:
i took the test
In an ionic compound, the negative and positive ions are held together by __________.
Answer:
the third one
Explanation:
5. Why is it necessary to regularly test the pH of pool
water?
Answer:
To ensure that everyone enjoys using your pool, it is important to keep the swimming pool pH levels in balance at all times. If the pH is too high, it could cause skin irritation and corrode metal parts on the pool. If the pH is too low, it could create a situation where the chlorine in the pool isn't as effective.
Explanation:
Answer:
I don't see multiple choice, so I'll answer this based on what I have learned on my free time.
Explanation:
Usually, when a ton of Urine is in a pool, it can throw off the Ph balance, and can even damage human eyes. Trust me, it's happened to me one time. my eyes burned like fire.
A solution with a molarity of 0.1850 contains 19.30 grams of BaCl2. What is the volume of the solution
Answer:
Volume in L = 0.50 L
Explanation:
Given data:
Molarity of solution = 0.1850 M
Mass of BaCl₂ = 19.30 g
Volume of solution = ?
Solution:
First of all we will calculate the number of moles of solute:
Number of moles = mass/molar mass
Molar mass of BaCl₂ = 208.23 g/mol
Number of moles = 19.30 g / 208.23 g/mol
Number of moles = 0.093 mol
Volume of solution:
Molarity = number of moles of solute / volume of solution in L
0.1850 M = 0.093 mol / Volume in L
Volume in L = 0.093 mol / 0.1850 M (M= mol/L)
Volume in L = 0.50 L
What energy transform occurs when the hot plate is plugged into the outlet and the control knob is on position?
Thermal to mechanical
Thermal to electrical
Electrical to thermal
Mechanical to thermal
Answer:
Its electrical to thermal energy
Explanation:
How do we view large areas of earth’s surface?
Answer: Are there options? I think the answer is continents, but I don't really understand the question. Is continents an option?
Explanation:
What is a lone pair?
A. Two pairs of electrons that form a double bond
B. Two atoms that have been pushed close to each other
C. A pair of electrons that is not used in bonding
D. A diatomic molecule attracted to no other molecule
Answer:
I BELIEVE IT is c.
Explanation:
D. The ¬_____________________ converts food into energy. It is found in both plant cells and animal cells.
Answer:
I believe it’s the mitochondria
Explanation:
Answer:
Mitochondria
Explanation:
Ik bc i have the vocab for that question
what are alkenes and there chemical property
Answer:
Alkenes contain a double bond that is composed of one sigma and one pi bond between two carbon atoms. The sigma bond has similar properties to those found in alkanes , while the pi bond is more reactive. The carbon atoms in the double bond are sp² hybridized , forming a planar structure.
Explanation:
Believe it!!!
PLZ HELP!!!!!asapnow
Answer:
Friction of wind against the ocean surface
84 pt =_____ qt
5.0 gal =_____ L
Answer:
84 pt =__50.4399___ qt
5.0 gal =___18.9271__ L
Explanation:
Have A Wonderful Day!!
Answer: 84 pints = 42 quarts
5.9 gallons = 1.89271
Explanation:
Give an example of a chemical reaction during which a single substance breaks
down. *
Answer:
2NaCl(l) => 2Na(s) + Cl₂(g)
Explanation:
Electrolysis of melt NaCl to form sodium (Na) metal and chlorine (Cl₂) gas.
This is a class of reaction called 'Decomposition Rxns'. For what it's worth, there are 6 distinct compound types that undergo breakdown by decomposition. The acronym C O A C H E can help remember them.
C - Carbonates => CaCO₃(s) => CaO + CO₂
O - Oxides of Metals => 2Fe₂O₃(s) => 4Fe°(s) + 3O₂(g)
A - Acids (Oxoacids) => H₂CO₃(aq) => CO₂(g) + H₂O(l)
C - Chlorates, Bromates & Iodates => 2KClO₃(s) => 2KCl(s) + 3O₂(g)
H - Hydroxides => Ca(OH)₂(s) => CaO(s) + H₂O(l)
E - Electrolysis => see above electrolysis of NaCl(l)
Answer:
2NaCl(l) => 2Na(s) + Cl₂(g)
Explanation:
how to calculate the mass of fraction of all elements in calcium carbonate
(CaCO3)
Answer:
I have made it in above figure hope it helps
Describe how an adaptation may have allowed giraffes to survive in savanna ecosystems
Why the microscope is made an inclination joint?
Answer:
inclination joint This is the joint between the pillar and the arm of the microscope. It is used to tilt the body tube and stage. It is usually best to keep the stage horizontal.
Explanation:
jupiter is much more larger than earth , would gravity be weaker or stronger here?
Answer:
stronger
Explanation:
there is more gravity on Jupiter since it is bigger than earth
What are the reactants in the reaction? What are their properties? Perform a quick Internet search, if needed.
The reactants in this reaction are sodium and chlorine. Sodium is a soft, silvery-white metal that is highly reactive. Chlorine is a poisonous greenish-yellow gas that has an odor and combines readily with other elements.
This might be the exact question so you might wanna rephrase it but good luck! :)))
A reactant is a substance that undergoes change during a chemical reaction.
A reaction in a chemical experiment is which takes place when there are mixtures between two or more reactants.
There are about four types of reactions which are:
SynthesisDecompositionSingle replacementDouble replacementPlease note that your question is not complete, therefore, i would give you a general overview to help you.
Some examples of reactants include:
HydrogenSodiumChlorine, etcRead more here:
https://brainly.com/question/12056938
How many carbon atoms are represented by the model below?
Answer:
3
Explanation:
This biome has extremely cold winters and short, mild summers. It has no trees, only low-growing plants with short root systems because of its frozen soil
called the permafrost. It is covered by snow for most of the year. Animals that live here must have wide paws or hooves to walk through the frozen mushy.
soil. This biome is known as the_________
A. Tropical rainforest
B. Taiga
C. Deciduous Forest
D. Desert
E. Grassland
F. Tundra
What three traits are used to classify organisms
hope this answer helps and have a good day
You have a particle of length 68 nm. What is this in meters? ( need help asap)
Answer:
B
Explanation:
Which two compounds are used in batteries?
sulfuric acid and potassium hydroxide
ammonium hydroxide and nitric acid
potassium hydroxide and nitric acid
sulfuric acid and ammonium hydroxide
Answer:
The chemicals which are electrolytes include: Sodium chloride, chloric acid, nitric acid, potassium nitrate, hydrochloric acid, potassium nitrate, sulfuric acid, sodium hydroxide, magnesium hydroxide and sodium acetate.
Answer:
Sulfuric acid and potassium hydroxide.
Explanation:
These are the two compounds used in car batteries, hope this helps!
Which ones are elements, compounds I’ll give brainliest.
WHAT TWO PLANT CELLS DONT PRODUCE PROTINES?!?!?!?!?
Complete the graphic organizer.
Basic Parts of an Atom
Answer:
I'm not sure but I think the answer is electrons, protons and neutrons.
Pls help!!! it’s a timed answer
Answer:
Explanation
whats your question
If you have 8.5 moles of water (H2O), how many grams of water do you have?
Answer: i think it is 144.16
Explanation:
how do you classify the society on the basis of economy write one characteristic of any two of them
Answer:
Explanation:
(1) The primary industry is mainly agriculture, which includes agricultural, forestry, animal husbandry and fishery components. Agriculture is the foundation of social economy. (2) The secondary industry, which mainly includes the industrial and construction industries.