Answer:
Kingdom Monera.
Explanation:
The unicellular organisms the student observed were most likely from the Kingdom Monera because in this kingdom, unicellular organisms are included which are prokaryotic in nature. Monera is a Greek word means "single" is a kingdom that contains organisms that are made up of one cell and having a prokaryotic cell means having no nuclear membrane and we know that bacteria is also a unicellular organism and prokaryotic in nature.
what is the compound name for (NH4)2SO4
Answer:
Diazanium sulfate is the correct answer.
Explanation:
Hope this helped Mark BRAINLIEST!!
What is the mass of 1 mole of Na3,PO4?
Answer:
163.940671 grams
Explanation:
You can view more details on each measurement unit: molecular weight of Na3PO4 or grams This compound is also known as Trisodium Phosphate. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Na3PO4, or 163.940671 grams.
The half-life of radium-226 is 1,600 years. It decays into radon-222. What fraction of the original amount of radium-226 in a sample will still be radium
after 8,000 years?
A.1/8
B.1/4
c.1/32
D.1/16
Answer:
Your answer will be C. 1/32
Answer:
C. 1/32
Explanation:
Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? Explain
a.Nitrogen
b.Oxygen
c.Argon
Answer: argon
Explanation:
. Round to the nearest whole number
.Do not include units in your answer, just the number
1kg=2.2lb
Answer:
21091mg of aspirin the person need to consume
Explanation:
To solve this question we must find the mass of the person in kg. Knowing the lethal dose for aspirin is 400mg/kg of person, we can find the amount of aspirin that the person need to consume to get a lethal dose:
Mass person:
116lb * (1kg / 2.2lb) = 52.7kg
Lethal dose:
52.7kg * (400mg / kg) =
21091mg of aspirin the person need to consumeEthyl alcohol has a density of 0.80 g/mL. What is the volume of 44g of ethyl alcohol
ANSWER CHOICES
55 mL
35 mL
42 mL
0.80 mL
Answer:
55mL
Explanation:
44g / 0.8g/mL = 55mL
what is chemical reaction
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
How many electrons are represented by a dash (-) in a lewis dot structure compound?
A. 2
B. 4
C.3
D. 1
Consider the following reaction: Solid zinc was added to 1.0 M HC1.
After 20.0 s, the temperature of the container increased by 0.5°C and 25.00 mL of
H2 was produced. The rate of this reaction was
Answer:
1.25 mL/s
Explanation:
Your are told that 25.0 mL of H2 was produced 20 seconds. This is equal to rate 25/20 = 1.25 mL/s
When a reaction progresses, the reactant concentration gradually decreases and the product concentration gradually increases. Here the rate of the reaction is 1.25 mL/s.
What is rate of reaction?The rate of a chemical reaction is defined as the rate of decrease of concentration of a reactant or the rate of increase of concentration of a product. The rate of the reaction is usually expressed in units mol L⁻¹s⁻¹. The rate of the reaction are affected by several factors like concentration of the reactants, temperature, etc.
An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentration of the reactants which determine the rate of the reaction is called rate equation.
Here it is seen that 25.0 mL of H2 was produced 20 seconds. So the rate is given as:
Rate = 25/20 = 1.25 mL/s
Thus the rate of the reaction is 1.25 mL/s.
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What is the function of the pistil and stamen of a plant?
To allow the plant to reproduce.
They provide support for the plant.
They protect the plant from the weather.
The protect the plant from predators.
Answer:
the answer is A
Explanation:
Hopefully u get the answer right
Answer:
A
Explanation:
give me thanks not stars
Which material would take the longest to cool off once heated?
Liquid water
Lead
Ice
Copper
Answer Liquid water
Explanation: I'm sure its that answer
Rod cells work best in dim light and enable you to see black, white, and shades of gray.
true
or
not
calculate the concentration of the solution produced when a 3.2g of sodium chloride is
issolved in 8dm of water.
Answer:
The concentration of the 3.2 g of sodium chloride in 8 dm³ of water is 6.845 × 10⁻³ M
Explanation:
The concentration of a solution is given as either the ratio of mass to volume, or the ratio of volume to volume or as molarity
[tex]Concentration, C = \dfrac{Mass}{Volume} = \dfrac{Volume}{Volume} = \dfrac{Number \ of \ moles }{Liters \ of \ solution}[/tex]
The number of moles present in 3.2 g of sodium chloride, 'n', is given as follows;
[tex]n = \dfrac{Mass}{Molar \ mass}[/tex]
The molar mass of sodium chloride, NaCl = 58.44 g/mol
n = 3.2 g/58.44 g/mol = 0.0547570157 moles
8 dm³ = 8 Liters
Therefore, the concentration, C = 0.0547570157 moles/(8 liters) = 6.845 × 10⁻³ M
The concentration of the 3.2 g of sodium chloride in 8 dm³ of water = 6.845 × 10⁻³ Molar solution.
How many grams are in 1.7 moles of CO2?
Answer:
748.1615 grams
Explanation:
Which statement describes the feeling interactions between frogs and insects? Select all that apply.
A. The frog is a predator
B. The interactions is mutualistic
C. The frog is a parasite
D. The number of insects can influence the number of frogs in the ecosystem.
Which of the following represents a double-displacement reaction?
a. ABC ➡️AB +C
b. A+B ➡️AB
c. AB + CD➡️AD + CB
d. A + BC ➡️AC + B
compare and contrast between combustion and rusting
Answer:
combustion is fast and destructive it also involves a lot of movement of the atoms where erosion is a slow process that does not involve a lot of energy
A gas at 1.10 atm and 30.0°C fills a flexible container with an initial volume of 2.00 L. If the temperature is raised to 80.0°C and the pressure increased to 2.40 atm, what is the new volume?
Answer:
P1=1.10atm
V1=2.00L
T1=30.0+273=303
P2=2.40atm
V2=?
T2=80.0+273=353
Explanation:
V2=1.10*2.00*353=776.6
2.40*303=727.2
776.6/727.2=1.0679L
The new volume occupied by the of gas as its temeprature and pressure is raised is 1.07L.
Combined gas lawCombined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.
It is expressed as;
P₁V₁/T₁ = P₂V₂/T₂
Given the data question;
Initila pressure P₁ = 1.10atmFinal pressure p₂ = 2.40atmInital temperature T₁ = 30.0°C = 303.15KFinal temperature T₂ = 80.0°C = 353.15KInitial Volume V₁ = 2.00LFinal Volume V₂ = ?To calculate the new volume that the gas occupy, we subtsitute our given values into the expression above.
P₁V₁/T₁ = P₂V₂/T₂
P₁V₁T₂ = P₂V₂T₁
V₂ = P₁V₁T₂ / P₂T₁
V₂ = ( 1.10atm × 2.00L × 353.15K ) / ( 2.40atm × 303.15K )
V₂ = 776.93LatmK / 727.56atmK
V₂ = 1.07L
Therefore, The new volume occupied by the of gas as its temeprature and pressure is raised is 1.07L.
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Which statement describes the endothermic reaction represented by this
graph?
Answer:
Option A, describes the endothermic reaction represented by this graph
Explanation:
In this graph the energy released (or the potential energy) at the time of product formation is lower than the potential energy of the reactants. Hence, additional energy input will be required to form the product. Thus, energy is absorbed during the reaction.
Option A is correct
Answer: energy is given off by the reaction
Explanation:
Some of the glucose required for cellular respiration in humans is obtained by??
Answer:
.
Explanation:
Some of the glucose required for cellular respiration in humans is obtained by external food source which are rich in carbohydrates.
What is cellular respiration?Cellular respiration is the process in which cells combines the oxygen with the foodstuff molecules, and converting the chemical energy into life sustaining activities as energy.
In the human body, we get the glucose for the cellular respiration from the external food source which are riched in carbohydrates, starch, etc. After converting the chemical energy to glucose then oxygen is absorbed in the lungs and circulate the blood through out the body by red blood cells.
Hence, we get glucose from food source.
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In the reaction below, 22 g of H2S with excess
O2 produced 5 g of sulfur.
? H2S + ? O2 → ? S + ? H2O .
What is the percent yield of sulfur?
Answer in units of %.
Answer:
24.1 %
Explanation:
This is the reaction of oxygen between hydrogen sulfide.
The equation is:
2H₂S + O₂ → 2S + 2H₂O
As the oxygen is the excess, limting reagent is the H₂S.
We convert the mass to moleS: 22g / 34.06 g/mol =
0.646 moles
Ratio is 2:2. 2 moles of sulfide can produce 2 moles of sulfur.
Then, 0.646 moles of sulfide will produce 0.646 moles of S.
We convert the moles to mass: 0.646 mol . 32.06 g/mol =
20.71 g
That's the theoretical yield.
% yield = (produced yield / theoretical yield) . 100
% yield = (5 g/ 20.71g) . 100 = 24.1 %
How many moles of O2 are needed to produce 8.33 moles of H2SO4?
write four facts of cross breeding plants
Answer:
Plant breeding
Plant breeding is the science of changing the traits of plants in order to produce desired characteristics. It has been used to improve the quality of nutrition in products for humans and animals.
Explanation:
What is the molar solubility of lead phosphate in water in moles?
Please help?!
Answer:
Now, the molar solubility of lead(II) phosphate in water is said to be equal to 6.2⋅10−12mol L−1 . This means that in one liter of water, presumably at room temperature, you can only hope to dissolve 6.2⋅10−12 moles of lead(II) phosphate.
Explanation:
Hope this helps!!
The moon appears to change _________ over the course of the _______________.
Answer:
shape or size? over the course of the month
The empirical formula for butene is
A.
CH2
B.
C₂H4
C.
Ca HG
D
C4H8
How many grams of HCl are needed to form 34.5 grams of Cl2?
Answer:
Expof HCl are required to produce 7.50 moles of ZnCl2? 6. Copper ... When 9.34 g of zinc react with excess hydrochloric acid how many grams of zinc chloride will.lanation:
Determine the pH of a 2.8 ×10−4 M solution
of Ca(OH)2.
Answer:
pH = 10.75
Explanation:
To solve this problem, we must find the molarity of [OH⁻]. With the molarity we can find the pOH = -log[OH⁻]
Using the equation:
pH = 14 - pOH
We can find the pH of the solution.
The molarity of Ca(OH)₂ is 2.8x10⁻⁴M, as there are 2 moles of OH⁻ in 1 mole of Ca(OH)₂, the molarity of [OH⁻] is 2*2.8x10⁻⁴M = 5.6x10⁻⁴M
pOH is
pOH = -log 5.6x10⁻⁴M
pOH = 3.25
pH = 14-pOH
pH = 10.75What property of water allows the water to cover the astronauts hand?
Answer:
The tendency for water molecules to stick together causes it to causes spheres in space. ... Magnetic-like molecules on water's surface cause the surface to behave like an elastic skin. Each molecule is pulled with equal tension by its neighbors.J
Explanation:
Can any one plz solve and send this question who ever solve this right I will make you brainliest this is physic
Answer: Energy = 10000J - 2000J = 8000J
Therefore, the energy is dissipated the skier moves down to the slope is 8000J
Explanation: