Answer:
Explanation:
The nucleus is a small, dense region at the center of the atom. It consists of positive protons and neutral neutrons, so it has an overall positive charge. The nucleus is just a tiny part of the atom, but it contains virtually all of the atom's mass.
How many atoms would be contained in 454 grams of iron?
Answer:
4.90 x 10 24 atoms
Explanation:
the 24 is the exponent for the 10
Use this equation to calculate the specific heat capacity of each metal:
cmetal =
c water = sp. heat capacity of water (4.18 J/gC)
m water = mass of the water in the cup
T water = change in water temperature
m metal = mass of the metal
T metal = change in metal temperature
What is the specific heat for the aluminum wire?
What is the specific heat for the steel wire?
What is the specific heat for the lead pellets?
Answer:
What is the specific heat for the aluminum wire?
0.82
What is the specific heat for the steel wire?
0.47
What is the specific heat for the lead pellets?
0.25
Explanation:
Answer:
What is the specific heat for the aluminum wire?
0.82
What is the specific heat for the steel wire?
0.47
What is the specific heat for the lead pellets?
0.25
Explanation:
This is the person above me. All credits go to them.
Why is it important to predict consequences when decision-making?
A.Considering the consequences can help you pick the option with the best outcome.
B.Predicting consequences isn’t a step in the decision-making process.
C.There usually aren’t any consequences when making decisions.
D.Consequences won’t help you make a decision.
Which is an example of geologic evolution?
Answer:
A gradual change in the shape of the continents.
Explanation:
An example is tropical plant fossils are found in the Artic.
An example of geologic evolution is a gradual change in the size of continents.
Geological evolution is the process of gradual change and events in antiquity that include the steps to create the Earth.
At first, there was extreme volcanism, later the planet cooled to create the crust. Also, condensed water vapor formed the oceans and seas.
The geological history of Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy).
Geological evolution studies the shape of the globe, how it formed, and the relationships of the different eras and the matter that changed during them.
Therefore, An example of geologic evolution is a gradual change in the size of continents.
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MRI machines use extremely strong magnetic fields. These fields must be adjustable to produce high-quality images. What might these
machines use to generate such a field?
A
electromagnets
B
permanent magnets
C
induced current
What is the final temperature of a system if 10.0 grams of cold water, originally at 10°C is mixed with 120.0 grams of hot water, originally at 77.0°C?
A. 83.1°C
B. 100.0°C
C. 71.8 °C
D. 95.1°C
A student lives in a place that receives lots of snow and ice during the winter. The student has observed that the highway department spreads salt on the road after a snowfall. Which of the following correctly explains why the highway department uses salt on the roads?
Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.
Salt raises the freezing point of water, which makes the melted snow on the road less likely to form ice.
Salt raises the vapor pressure of water, which makes the melted snow more likely to evaporate before it freezes.
Salt lowers the osmotic pressure of water, which makes the melted snow more likely to be absorbed into the ground before it freezes.
Answer:
Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.
Answer:
A
Explanation:
Edge.
What important ingredients do you need to create a fertilized egg
Answer:
In the 1970s, Epel and other researchers showed that calcium is the essential factor that sparks development in eggs. As calcium levels rise, metabolic changes occur that cause the egg to divide and form into an embryo.
Explanation:
Neon in a piston is compressed to a volume of 14L its original volume was 22 L at 11.2 atm find the new pressure in atm
CH4+202>CO2+2H2O ; How many grams of water are produced from 30.0g of oxygen? PLS HELP AND SHOW WORK!!!!
How many grams of NaOH are produced from 2.1g of Na2O?
Na2O + H20 --> 2NaOH
Answer:
2.72g
Explanation:
The balanced equation of this reaction is given as follows:
Na2O + H20 --> 2NaOH
Based on this balanced equation, 1 mole of Na2O will produce 2 moles of NaOH.
First, we need to convert mass of Na2O into moles by using the formula;
mole = mass/molar mass
Molar mass of Na2O = 23(2) + 16
= 46 + 16
= 62g/mol
mole = 2.1g/62g/mol
mole of Na2O = 0.034mol
Hence, if 1 mole of Na2O will produce 2 moles of NaOH.
Then, 0.034mol of Na2O will produce (0.034 × 2) = 0.068mol of NaOH.
To convert mole of NaOH to mass, we use;
mole = mass/molar mass
Molar mass of NaOH = 23 + 16 + 1 = 40g/mol
0.068 = mass/40
mass of NaOH produced = 2.72g.
*Urgent*
A balloon has a volume of 31.8 L at a temperature of 46 degrees C. What is the new temperature
of the balloon in degrees C if the volume is changed to 49.2 liters?
Round answers to 0.1 decimals
Answer:
The new volume will be
0.7 L
Explanation:
This is an illustration of Charles' law, some of the time called the temperature-volume law. It expresses that the volume of a gas is straightforwardly corresponding to the Kelvin temperature, while pressing factor and sum are held steady. The condition is V 1 T 1 = V 2 T 2 , where V is volume and T is temperature in Kelvins. Known V 1 = 0.5 L T 1 = 20 ∘ C + 273.15 = 293 K T 2 = 150 ∘ C + 273.15 = 423 K Obscure V 2 Arrangement Revise the condition to confine V 2 . Substitute the known qualities into the condition and address. V 2 = V 1 T 2 T 1 V 2 = ( 0.5 L × 423 K ) 293 K = 0.7 L adjusted to one huge figure
what is the Ka of a 0.0592 M solution of hydrofluoric acid (HF) with a pH of 6.90
Answer:
2.7*10^-13
coefficient= 2.7
exponent= -13
Explanation:
Answer: 2.7 x 10^-13
Explanation:
What is the normality of a 2.0 M NaOH solution?
Answer:
Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0
Explanation:
I had the same question on one of my assignments earlier
Name the following compound: C2Cl6
What does temperature measure?
A. Degrees within molecules
B. Pressure within molecules
C. Kinetic energy within molecules
D. Potential energy within molecules
SUBME
Answer:
C is the answer!
Explanation:
temperature is a measurement of the average kinetic energy of the particles in an object
the movement of carbon between the atmosphere, land, and ocean is called what?
how does the water cycle sustains life
plz help! !!
Water is constantly being cycled between the atmosphere, the ocean and the land. This cycling is a very important process that helps sustain life on Earth. When the sun heats water, the water evaporates or changes to water vapor. Water vapor rises and condenses or changes back into liquid water droplets.
what is the similar of snow and sleet pls help me
Answer:
Explanation: Snow forms in clouds at temperatures below freezing. As snow falls through the atmosphere, the air remains at least 32° F or colder. ... It then re-enters another pocket of cold air before reaching the surface. The snowflake refreezes and becomes an ice pellet we call sleet.
Identify the pair in whic 1 the formula does not match the name
sulfite, SO32
nitrite, NO3-
hydroxide, OB
dichromate, C 20-2
Answer:
hydroxide is the one because it is the one HAHAH
Answer:
hydroxide, OB
Explanation:
hydroxide,OB
Number 8 plsssssssssss
Answer:
the correct answer is commensalism
Calculate the work for the expansion of CO2 from 1.0 to 6.5 litres against pressure of 1.0 atm at constant temperature
Answer:
557.3J is the work of expansion of the CO2 gas
Explanation:
The work of expansion of a gas under constant temperature and pressure (Isobaric pressure) is:
W = P*ΔV
Where W is work
P is pressure = 1.0atm
ΔV = Final volume - Initial Volume = 6.5L - 1.0L = 5.5L
Replacing:
W = 1.0atm*5.5L
W = 5.5atmL
In Joules (1atmL = 101.325J):
5.5atmL * (101.325J / 1atmL) =
557.3J is the work of expansion of the CO2 gas
S8 +O2 = SO8
Given 80 mols of product, find the amount of each reactant in mols.
Answer:
10 moles of S₈
320 moles O₂
Explanation:
S₈ +O₂ → SO₈The balanced equation is:
S₈ + 32O₂ → 8SO₈Now we can convert moles of SO₈ (the product) into moles of each reactant, using the stoichiometric coefficients of the balanced reaction:
80 mol SO₈ * [tex]\frac{1molS_8}{8molSO_8}[/tex] = 10 mol S₈80 mol SO₈ * [tex]\frac{32molO_2}{8molSO_8}[/tex] = 320 mol O₂In order for 80 moles of SO₈ to be produced, 10 moles of S₈ need to react with 320 moles of O₂.
How many molecules are in 6.20 moles of CaCO3?
1 mole is equal to 1 moles CaCO3, or 100.0869 grams.
What is mole?A mole is just a measuring scale. In reality, it's one of the International System of Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created.
The mole is a SI unit that is used to quantify any quantity of a substance. The word "mole" is shortened to "mol".
A mole consists of precisely 6.022140761023 particles. The "particles" could be anything, from tiny things like electrons or atoms to enormous things like stars or elephants.
Therefore, 1 mole is equal to 1 moles CaCO3, or 100.0869 grams.
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Who elects or appoints Representative and Senators?
(Marking brainliest for the quickest correct answer!)
1) the president
2) the electoral college
3) The people
Answer:
3) The People
Explanation:
Members Of Congress In Both Houses ( Democrats And Republicans ) Are Elected By Direct Popular Vote. Senators Are Elected Via A Statewide Vote ( The People All Around The World ) And Representatives Are Elected By Voters In Each Congressional District.
Anyone know the answer to this?
what is the molarity of a solution in which 10.0 g of AgNO3 is dissolved in 5 L of a solution
Answer:
no of moles = given mass/molar mass
no of moles = 10/169.87 =0.058moles
molarity = number of moles of solute/volume of solution in litre
molarity = 0.058/5
molarity = 0.0116
According to the dichotomous key, organism 2 is a
A)
dragonfly nymph
B)
water scorpion
C)
bristle worm.
D)
water mite.
The reason Senators are in office for 6 years is....(pick one of the following)
1) To separate Senators from the whims of the
general public.
2) to save money in elections
3) Because Senators are
required to be older
than representatives
what is the only thing that stops gamma rays?
The Answer is LEAD ......................