Answers
Magnesium and Calcium Oxide
Trick : Reactants are always on left
Answer:
magnesium and calcium oxide
Related Questions
Calculate the poh of this solution. round to the nearest hundredth. ph = 1.90 poh =
Answers
Answer:
10.25
Explanation:
There I proved it
Answer:
pOH = 12.10
Explanation:
pOH = 14 - pH = 14 - 1.90 = 12.10
Consider the balanced equation below.
2H2S + 3O2 Right arrow. 2SO2 + 2H2O
Which option gives the correct mole ratios?
H2S:SO2 = 2:2 and O2:H2O = 3:2
H2S:SO2 = 2:3 and O2:H2O = 3:2
H2S:SO2 = 4:4 and O2:H2O = 5:4
H2S:SO2 = 4:6 and O2:H2O = 4:4
Answers
Answer:
4:6 and 4:4
Explanation:
double the right side so double the left side to get these ratios
HELPPPPPPPPP!!!!....... Which statement best describes how chemical equations demonstrate conservation of mass?
A.
The number of reactants is the same as the number of products.
B.
The compounds are the same on each side of the reaction.
C.
The number of atoms of each element is the same on each side of the equation.
D.
The state of matter is the same on each side of the equation.Which details from the passage are emphasized in both the text and images?
Answers
Answer:
A. The mass of reactants is the same as the mass of products
You are a NASA engineer. You are the chief engineer for the Apollo 13 mission to the moon. The astronauts are running out of oxygen and need to get rid of the excess carbon dioxide. You know that sodium hydroxide (NaOH) has been suggested as a means of removing carbon dioxide from the spacecraft cabin. The filter which they had been using is fully saturated and no longer works. You remember that the astronauts have a 5000. g container of sodium hydroxide on the ship. You also know that sodium hydroxide can be used to remove carbon dioxide.
Use the following reaction: NaOH + CO2 → Na2CO3 + H2O
The astronauts have 2 days left before they land on Earth. You know that there are three astronauts, and each astronaut emits roughly 500. g Of carbon dioxide each day. Is there enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon dioxide, or are the astronauts doomed? SHOW ALL YOUR WORK - DON’T FORGET TO BALANCE THE EQUATION
Guiding Questions: How many grams of CO2 are produced in a day? How many grams of CO2 are produced in both days? How many grams of NaOH do you need to get rid of 3000 g of CO2?
Answers
Answer:
We know that there are three astronauts and each one of them emits 500 grams of carbon dioxide each day, so the total carbon dioxide emitted each day.
Explanation:
From the mole ratio of the reaction, there is not enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon
What was of Sodium hydroxide is required?The mass of sodium hydroxide required depends on the mass of CO2 produced by the astronauts.
The mass of CO2 produced by the astronauts is calculated as follows;
Mass of CO2 produced = 3 × 2 × 500 g = 3000 g of CO2
The mass of sodium hydroxide required is calculatedfrom the eqaution of the reaction given below:
[tex]2NaOH + CO_2 → Na_2CO_3 + H_2O \\ [/tex]2 moles of sodium hydroxide reacts with 1 mole of CO2
Molar mass of NaOH = 40 g/mol
Molar mass of CO2 = 44 g/mol
Mass of sodium hydroxide required = 3000 g × 2 × 40/44 = 5454.54 g
Therefore, there is not enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon.
Learn more about mass and moles at: https://brainly.com/question/15374113
In terms of drug development, rank the following microbes from most difficult (1) to least difficult (3):
Answers
Answer:
See below ↓↓↓
Explanation:
Helminths = 1 Most Difficult
Fungi = 2 Moderately Difficult [Option not given, but 2 is right answer]
Bacteria = 3 Least Difficult
Need help with Chem.
Answers
Explanation:
It would even out the number of particles per section
How many moles of silver oxide (l) are needed to produce 4 moles of silver?
Answers
The number of moles of silver oxide (I) needed to produce 4 moles of silver is 2 moles
StoichiometryFrom the question, we are to determine the number of moles of silver oxide (I) needed to produce 4 moles of silver
First, we will write the balaced chemical equation for the decomposition of silver oxide (I)
2Ag₂O(s) → 4Ag(s) + O₂(g)
This means, 2 moles of silver oxide (I) [Ag₂O] decomposes to give 4 moles of silver and 1 mole of oxygen gas.
From the balanced chemical equation, it is easy to deduce the number of moles of silver oxide (I) that would give 4 moles of silver.
Hence, the number of moles of silver oxide (I) needed to produce 4 moles of silver is 2 moles
Learn more on Stoichiometry here: https://brainly.com/question/18834543
a sample of helium gas has a volume of 200.0 mL at 730mm Hg pressure. What pressure, in atm is needed to reduce the volume at a constant temperature to 50.0 mL
Answers
Explanation:
The question had been explained.
1. How is the genome like a stack of papers?
Answers
Answer:
Except for mature red blood cells, all human cells contain a complete genome. DNA in the human genome is arranged into 24 distinct chromosomes—physically separate molecules that range in length from about 50 mil- lion to 250 million base pairs.
Answer:
As represented by this huge stack of paper, the human genome contains more than three billion nucleotides or DNA "letters.".
Explanation:
.
If you dissolve 8 grams NaOH in 0.1L of water what is the molarity of NaOH is solution? how many miles per liter do you have
Answers
Answer:
2 mol/L
Explanation:
molarity = moles/litres
NaOH = 23 + 16 + 1 = 40 g/mol
[tex] ? \: mol \: naoh \: = 8 \: g \: naoh \: \times \\ \frac{1 \: mol \: naoh}{40 \: g \: naoh} = 0.2 \: mol \: naoh[/tex]
molarity = 0.2 mol/0.1 L = 2 mol/L
ATCG combine different patterns to form different ____
Answers
Answer:
Chemicals
Explanation:
Your answer would be chemicals because of you have different inputs you would also have a different output depending.
I hope it helps! Have a great day!
Anygays-
Answer:
Chemicals
Explanation:
Different ATCG makes different chemicals.
I hope it helps! Have a great day!
Muffin °-°
Sodium hydroxide is soluble as shown by the following reaction: NaOH(s)-> Na +(aq) + OH-(aq). What is the pOH of a 3.0x10^-3 NaOH solution?
Answers
Sodium hydroxide is a soluble strong base. The pOH of a 3.0 × 10⁻³ M-sodium hydroxide solution is 2.5.
What is a base?According to Arrhenius, a base is a species that releases OH⁻ ions in an aqueous medium.
Let's consider the basic reaction of NaOH.
NaOH(s) ⇒ Na⁺(aq) + OH⁻(aq)
NaOH is a strong base. This means that the concentration of OH⁻ will be equal to the initial concentration of NaOH, i.e. 3.0 × 10⁻³ M.
Then, we can calculate the pOH of the NaOH solution using the following expression.
pOH = -log [OH⁻] = -log 3.0 × 10⁻³ = 2.5
Sodium hydroxide is a soluble strong base. The pOH of a 3.0 × 10⁻³ M-sodium hydroxide solution is 2.5.
Learn more about strong bases here: https://brainly.com/question/15192126
Answer:2.5
Explanation:
The strongest forces of attraction occur between molecules of
Answers
Answer:
Dipole-dipole
- are the strongest intermolecular force of attraction.
Explanation:
Yun lang <3
PLS HURRRRRRRRYYYY!!!!
Research a type of plant tropism not presented in the lessons. Create a meme below that name and describes the tropism.
Answers
In an ecosystem, plant tropism represented is phototropism which is towards the direction of light.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
https://brainly.com/question/13979184
#SPJ3
1. Set up a Bunsen burner on a heat-proof mat.
2. Take a small piece of magnesium ribbon and place it in some tongs
3. Hold the tongs at arm's length and place the magnesium ribbon in the Bunsen flame.
4. Once the magnesium is burning DO NOT LOOK DIRECTLY AT THE FAME. Magnesium burns very brightly and the light could harm your eyes.
A1. Describe what has been formed
A2. Name the reactants in this chemical reaction.
A3. List all the safety precautions you need to take while carrying out this experiment
Answers
Answer:
MAKE ME BRAINLIEST TOOK TIME!!!!
Explanation:
A1) When magnesium reacts with oxygen, it produces light bright enough to blind you temporarily. Magnesium burns so bright because the reaction releases a lot of heat. As a result of this exothermic reaction, magnesium gives two electrons to oxygen, forming powdery magnesium oxide (MgO).
A2) magnesium oxide
A3) Do not return chemicals to their original packaging. An incompatible mixture may accidentally be formed.
Keep chemical containers closed. Dust and vapour may escape from an open container, while gases and suspended material may penetrate this, causing the nature of the chemical to change. This will also avoid unnecessary exposure.
Never use a wrong or an unmarked reagent. If you are unsure about the compound, do not use it. Instead, have it disposed of (see Disposal of Hazardous Waste).
Never put spatulas, stirrers or other objects into a storage container for chemicals. Remove the contents by pouring and rolling the contents of the glass into a beaker, glass container or other suitable equipment. Spatulas may be used with caution in laboratory reagent containers. Remember the labelling (see the Safety Rules for working in lab).
Once removed from the bottle or glass, cork stoppers must be placed on a clean surface (e.g. a watch glass or other suitable equipment) with the opening facing down. This is to avoid contamination of the compound and unnecessary exposure.
Chemical bottles must not be carried by the neck of the bottle, nor next to your body. Suitable carrying arrangements should be employed, e.g. buckets or trolleys.
When pouring from bottles, the label should always face upward to prevent any spillage from destroying the label.
Never put any chemicals in the bottle other than the one indicated on the label.
Special precautions should be taken when handling concentrated acids. Dilution of acids should be performed by pouring the acid into water and stirring continuously.
Please answer my question I really need it now
Answers
Answer:
1 Li , Na, K, Rb, Cs
2 Co, V , Cr, Mn, Fe
3 Po, Te, Se, S, O
forty miles above the earth's surface the temperature is 250k and the pressure is only 0.20 torr. what is the density of air at this altitude? (assume the molar mass of air is 28.96 g/mol)
i got that D=3.71*10^-4 is this right?
Answers
For a Forty miles above the earth's surface, the temperature at 250k and the pressure at only 0.20 torr, the density of air at this altitude is mathematically given as
d=3.732*10{-4}g/l
Generally, the equation for the ideal gas is mathematically given as
PV=(m/mw)RT
Therefore
d=m/v
d=26,664*20/83.14*250
d=0.37152
d=3.732*10{-4}g/l
In conclusion, the density
d=3.732*10{-4}g/l
Read more about Temperature
https://brainly.com/question/13439286
two ways a community can protect the water supply.
Answers
Answer:
Keep the tap closed when not using it, and to not use it every day, like washing a car, you can clean it with a sponge and a bucket of water.
Explanation:
I don't know if this helps though.
Methane (CH4), is said to be the cleanest burning fossil fuel. When burned, it releases carbon dioxide gas and forms water. Using the equation below, determine which of the following is true (assuming there is an infinite supply of oxygen gas (O2)). Select all that apply.
For every 1 molecule of methane CH4 that reacts, 2 molecules of H2O are produced.
For every 2 moles of methane (CH4) that reacts, 2 moles of H2O are produced.
For every 2,000 molecules of methane (CH4) that reacts, 2,000 molecules of H2O are produced.
For every 20 grams of methane (CH4) that reacts, 40 grams of H2O are produced.
For every 200 moles of methane (CH4) that reacts, 400 moles of H2O are produced.
Answers
From the stoichiometry of the balanced reaction equation, the correct statement are;
For every 1 molecule of methane CH4 that reacts, 2 molecules of H2O are produced.For every 20 grams of methane (CH4) that reacts, 40 grams of H2O are produced.For every 200 moles of methane (CH4) that reacts, 400 moles of H2O are produced.What is combustion?The term combustion refers to the burning of fossil fuels for the purpose of energy production. The equation for reaction is CH4 + 2O2 ---> CO2 + 2H2O.
Using this equation as shown, the true statements are;
For every 1 molecule of methane CH4 that reacts, 2 molecules of H2O are produced.For every 20 grams of methane (CH4) that reacts, 40 grams of H2O are produced.For every 200 moles of methane (CH4) that reacts, 400 moles of H2O are produced.Learn more about combustion: https://brainly.com/question/15117038
A buffer solution must contain: Select one: a relatively high amount of both an acid and its conjugate base dissolved in water a relatively high amount of the conjugate base dissolved in water a solution that is at pH 7 a relatively high amount of a weak acid dissolved in water a solution that does not contain water
Answers
A buffer solution must contain relatively high amount of both an acid and its conjugate base dissolved in water.
What is a Buffer Solution?A buffer solutrion is a soltion that contains appreciable amounts of a
A mixture of a weak acid and its conjugate base A mixture of a weak base and its conjugate acidweak conjugate acid-base pairBuffer solutions resist any small change in pH when small amounts of a strong acid or a strong base are added
Examples of a buffer solution is
The solution of acetic acid and sodium acetate (CH3COOH + CH3COONa),this contains a weak acid and its salt.The solution of ammonia and ammonium chloride (NH3(aq) + NH4Cl(aq), This contains a weak base and its salt.Learn more here on Buffer solution:https://brainly.com/question/10643807
Balancing equations
I'll give brainliest.
Answers
Answer:
You should follow these steps:
Count each type of atom in reactants and products.
Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substances.
Repeat steps 1 and 2 until the equation is balanced.
Explanation:
a solution with a pH of 4.6 is a:
Answers
what is the purpose of the lab ? PLSSS HELPPPPP
Answers
Answer:
To keep apparatus, chemicals and carry out experiments
what are the basic elements of environment
Answers
Answer:
the basic elements of environment are lithosphere, hydrosphere, atmosphere and biosphere.
Explanation:
Joseph divides 8.64 by 2.0. How many significant figures should his answer have?
Answers
Answer:
2 significant figures
Good luck with your work! :)
Guys helllpppppppppppppppppppppppppp
Answers
What are the steps of natural selection?
Answers
Answer:
The five steps involved in the process of natural selection are
Variation • Inheritance • Selection • Time • Adaptation
☆anvipatel77☆
•Expert•
Brainly Community Contributor
what factors determine the amount of radiant energy we will receive on earth?
Answers
Metallic minerals are consumed in _______ amounts than nonmetallic minerals and materials. group of answer choices
Answers
describe how to separate iron fillings, iron (II) chloride crystals and sulphur powder all separately
Answers
Answer:
1. Place in a platic bag and use a magnet to attract the iron filings. [See explanation for an alternative step].
2. Disolve the remainer in water
3. Pass the liquid through a microporous filter to capture the undissolved sulfur
4. Evaporate the filtered water to retrieve iron chloride crystals
Explanation:
The Fe(II) chloride will dissolve in water. It is paramagnetic, and thus is weakly attracted to a magnet. The process above should not result in attracting the solid Fe(II) crystals. In fact, it is probably acceptable to dissolve the entire sample in water as the fisrt step. The dissolved Fe(II) chloride should also not be strongly attraced to a magnet, and htis step would allow easier separation of the iron filings.
Sulfur is not soluble in water, so it will collect as a dsolid in the microporous filter.
The Fe(II) has a high solubility, so it will wind up in the filtered soluition. Evaopate using heat or vacuum to retrieve the solid Fe(II) chloride crystals (they will be hydrated).
