Answer:
6.02x10^23
Explanation:
1 mole of water is equivalent to 1 molecule of 6.02x10^23
How can autoimmune diseases be dangerous?
Nitrogen-13 emits beta radiation and decays to carbon-13 with a half life of 10
minutes. Assume a starting mass of 2.00 g of nitrogen-13.
(Use to answer the questions below.)
How long is three half-lives in the example above? *
Answer:
From the Question....
A half life is 10minutes...
3half lives would be a total of 30minutes.
b) determine the number of moles of carbon dioxide
produced.
Explanation:
The mass of one mole of a substance, expressed in gms, is equal to the mean molecular mass of the substance. The molecular mass of CO2= 12+2x16= 44 so the mass if a mole of CO2 is approximately 44 grams.
Hope it helps!!!...
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Harim placed 5mL of ethanol into a container that weighs 1 gram using a dropper. He already knew the density of ethanol is 0.78 g/mL.
What is the mass of the ethanol, not including the container?
Answer:
there it is fella tried on ma own consciousness
This unknown element could most likely be a part of which of the following
familles?
A Alkall metals
B Alkaline earth metals
C Halogens
D Noble Gases
Answer:
halogen
Explanation:
because the lewis dot structure shows 7 dots which means 7 valence electron. halohe falls on group 17 or7A having 7 valence electron
N2 + 3H2 → 2NH3 How many moles of hydrogen are needed to react with 5 moles of nitrogen?
Answer: 15 mol
Explanation:
From the equation, we know that for every mole of nitrogen consumed, 3 moles of hydrogen are consumed.
So, the answer is 5(3) = 15 mol
What is the molarity when 25.0 g of the compound NaClO3 is placed in 85.0 mL of solution?
Answer: Molarity when 25.0 g of the compound [tex]NaClO_{3}[/tex]is placed in 85.0 mL of solution is 294.12 M.
Explanation:
Given: Mass = 25.0 g
Volume = 85.0 mL (1 mL = 0.001 L) = 0.085 L
Molarity is the number of moles of a substance divided by volume in liter.
Hence, molarity of given solution is calculated as follows.
[tex]Molarity = \frac{mass}{Volume (in L)}[/tex]
Substitute the values into above formula as follows.
[tex]Molarity = \frac{mass}{volume (in L)}\\= \frac{25.0 g}{0.085 L}\\= 294.12 M[/tex]
Thus, we can conclude that molarity when 25.0 g of the compound [tex]NaClO_{3}[/tex]is placed in 85.0 mL of solution is 294.12 M.
HELP ME PLEASE
IM LITERALLY FAILING
Which of the following is not a component of cell theory?
a. Cells can be generated by element condensation in water vapor.
b. All organisms are made of one or more cells.
c. Cells are basic building blocks of all life.
d. Cells must come from pre-existing cells.
Answer:
A
Explanation:
Definitely not in the cell theory
what is the difference between autotrophs and heterotrophs?
Answer:
Autotrophs have the ability to synthesize their own food from the substances surrounding them. Examples of this are photosynthesis or chemical energy. Heterotrophs cannot synthesize their own food. They have to get their nutrition from other animals or plants.
In shorter terms, autotrophs are plants. Heterotrophs are humans.
Explanation:
How many miles are in 27.4 g of NO2
Answer:
0.59 moles
Explanation:
Given mass = 27.4 g
Molar mass of NO₂ = 46 g/mol
We need to find the number of moles. We know that,
No of moles = given mass/molar mass
Put all the values,
[tex]n=\dfrac{27.4}{46}\\\\n=0.59[/tex]
Hence, there are 0.59 moles of NO₂ .
Why would the acidic water that erupts from
geysers burn your skin?
Answer:
They're sometimes acidic
Microorganisms also break off pieces of surrounding rocks, which adds sulfuric acid to the pools. This highly acidic water bubbles to the surface, where it can burn anyone who is exposed to it
Explanation:
thank me later
HELPPP
4) The picture below shows information about the element Gold. How many protons does an atom of Gold have?
Answer:
79 protons.
Explanation:
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A chemical reaction is taking place between two reactants dissolved in a liter of water. If an additional liter of pure water is added to the reaction mixture, what will be the effect on the reaction rate? Explain
Answer:
The chemical reaction rate will have a effect that which two reactants disolve in liter so if pure water is added it will still have the same reaction but lighter
Explanation:
#keep on learning
Na2S(aq)+Cd(NO3)2(aq) 2NaNO3(aq)+CdS(s)
Sodium sulfide is the limiting reactant. Select the substances that are found in the test tube after the reaction has ended.
A) Na2S
B) Cd(NO3)2
C) NaNO3
D) CdS
I need help on dis chem shi if y’all can answer fa me I would appreciate dat
How many moles of hypomanganous acid, H3MnO4, are contained in 22.912 g?
Answer:
0.188mol
Explanation:
Using the formula as follows:
mole = mass/molar mass
Molar mass of hypomanganous acid, H3MnO4 = 1(3) + 55 + 16(4)
= 3 + 55 + 64
= 122g/mol
Mass of H3MnO4 is given as 22.912 g
Hence;
moles = 22.912 ÷ 122
number of moles = 0.188mol
Why chemical industry important for the nation with its examples.
Explanation:
employment in the country.
economic boom n latest techonology.
less poverty.
more development.
more jobs for people.
increase in exports which will make large profits n will be utilized in the development of country.
GDP per capita will increase.
high standard of living.
milk sours because of a chemical reaction that takes place between some of the chemicals that make up the milk. Why does a carton of milk left out on a countertop sour sooner than a carton of milk left in the refidgerator
Answer: A lower temperature slows down the reaction that causes souring, making the milk last longer in the refrigerator.
Explanation:
Milk is made up of different constituents which includes:
--> water,
--> fat,
--> proteins,
--> lactose (milk sugar) and minerals (salts).
Milk is also considered to be a heterogeneous mixture because of the presence of fat and water which are two immiscible liquid phases that are present.
Milk contains a sugar called lactose. It also contains harmless bacteria called lactobacillus, which uses lactose for energy and creates lactic acid as a by-product. It is the lactic acid which makes milk taste sour. Therefore when milk is kept at a LOWER temperature, these bacteria growths are limited but at a HIGHER temperature such as room temperature, the growth is increased. As they increase in growth, the bacteria makes use of the lactose for energy and creates lactic acid as a by-product as earlier mentioned, leading to the sour taste observed.
Since we know that _______________, we can conclude that the gas produced when mixing bath bombs in water could not be baking soda, citric acid, or water.
Answer:
Sodium bicarbonate.
Explanation:
The gas produced during the mixing of bath bombs in water is Sodium bicarbonate. If the reaction is with citric acid then Sodium citrate can be produced. They are weak acid with bicarbonate base. These bath bombs can be a mixture of wet and dry substances and any shape can be mold.
A gas at 200 K occupies a volume of 350 ml. What temperature is needed to increase the volume
to 500 mL?
Answer: Temperature in constant pressure is 286 K
Explanation: If pressure remains constant, then V/T = constant.
V1 = 350 ml and T1 = 200 K and V2 = 500 ml. V1/T1 = V2/T2
and T2 = T1· V2 / V1 = 200 K · 500 ml / 300 ml = 285,7 K
A physics experiment is conducted at a pressure of 14.0 kPa. What is this pressure in mmHg?
Answer:
18.4 mmHg. The answer is 18.4 mmHg.
How many moles of Chlorine gas are required to produce 5.35 moles of NaCl in this
reaction?
Answer:
2.675 moles of Chlorine gas are required
Explanation:
Chlorine gas, Cl2, reacts with NaBr to produce NaCl and Br2 as follows:
Cl2 + 2NaBr → 2NaCl + Br2
Where 1 mole of chlorine gas produce 2 moles of NaCl
Thus, to produce 5.35 moles of NaCl are required:
5.35mol NaCl * (1mol Cl2 / 2mol NaCl) =
2.675 moles of Chlorine gas are required____is the degree of hotness or coldness of a body or place
I Need Help!!!
Let's say one of our bicycles tires has a volume of 30.0 Liters at 300 K. What will happen if
we double the volume?
Answer:
I think that temperature will be cut in half.
When volume increases, pressure decreases. As pressure decreases, temperature decreases. So if you double volume, pressure is halved and so will the temperature. I'm new to this, but I think that's the answer . Tell me if I'm right good luck!
If I have 4.4 moles of nitrous oxide (laughing gas) that is kept at 32.9 °C in a container under 1.6 atm, what is the volume of the container? (R = 0.0821 (L*atm)/(mol*K))
Round your answer to 1 decimal place.
Answer:
Explanation:
Using the ideal gas equation as follows:
PV = nRT
Where:
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
Based on the information provided in this question;
P = 1.6atm
n = 4.4 moles
R = 0.0821 L*atm/mol*K
T = 32.9°C = 32.9 + 273 = 305.9K
V = ?
In what sense are photons quantized?
A. Each photon emits more energy than its absorbs
B. Each photon can have multiple frequencies
C. Each photon travels exactly at the same speed of light
D. Each photon has a specific amount of energy
Answer:
Each photon has a specific amount of energy
Explanation:
When temperature drops, (for example from 20 degrees celsius to 10 degrees celsius)
a.) energy increases
b.) particles move slower
c.) particles collide more often
d.) pressure increases
How many molecules are in 50 grams of water?
Hamood backwards is hamood
Answer:
dang bro, thats deep
Explanation:
so deep imma cry
Which of the following
are
products of photosynthesis?
1 water
2 carbon dioxide
3 glucose
4 oxygen gas
Multiple choice
Answer:
4. oxygen gas
Explanation:
when a plant goes through photosynthesis, it takes in Carbon Dioxide and releases Oxygen