Answers
Related Questions
TRUE OR FALSE!!
All solids have a closely packed, fixed arrangement of particles.
A. True
B. False
this is a test, help!!
Answers
Answer:
false
Explanation:
jk true
____ energy is the energy a roller coaster stores while moving to the top of a hill.
A. G-Force
B.Potential
C. Stirred
D. Kinetic
Answers
Answer:
B
Explanation:
trust me im 100% correct
Write the principle of separation of mixture.
Answers
Explanation:
Mixtures can be separated using a variety of techniques. Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material.
How do combination circuits help prevent problems in circuits in a home? If it helps, think about a bedroom since all electrical work in a bedroom is on the same circuit.
Answers
Why is it easy for some elements to lose electrons and harder for others?
Answers
Answer:
The further away electrons are from the nucleus the easier it is for atoms to use electrons.
Explanation:
what is the percent of mercury?
Answers
Answer:
42%
Explanation:
What components does the solar system appear to have formed from?
Answers
Answer:
I would say a dense cloud of interstellar gas and dust.
Each water molecule can form hydrogen bonds with up to _____ neighbors
Group of answer choices
6
8
2
4
Answers
Answer:
2
Explanation:
thats the answer.have good day
HELP ME PLEASE
THANK YOU
Answers
Answer:
i think its letter D
Explanation:
Answer:
I think it is B if it is not then I am sorry.
Explanation:
Which is the smallest?
A) 1.3 x 1020
B) 2.9 x 1021
C) 9.5 x 1032
d) 8.4 x 1019
Answers
A. 1326
B. 2960.9
C. 9804
D. 8559.6
⚠️NEED HELP ASAP⚠️What is the oxidation number of nitrogen in (NO3)2
A) +3
B) +1
C+5
D) -5
Answers
Explanation:
its +5 trust me on this hope this helps kiddo
Today scientists know that organisms are much less diverse than Darwin imagined.
True or false?
Answers
Answer:
FALSE
Explanation:
they were much more diverse
what does it mean if elements are in the same group on the periodic table?
Answers
Answer:
mostly metals
Explanation:
just learned
Nio conducts a science experiment. He puts yeast into a bottle with water and sugar, and then caps the bottle with a balloon. He returns two hours later and notices there are bubbles on the surface of the mixture in the bottle and that the balloon has inflated, but there are no other apparent changes.
What most likely happened?
a non-chemical change, because there are no indicators of chemical changes taking place
a chemical change, because the mixture changed color
a chemical change, because a gas was produced
a non-chemical change, because the changes that occurred are reversible
Answers
Answer:the answer is a chemical change, because a gas was produced
Explanation: yeast is a chemical
Answer:
The answer is C.
"Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions."
Explanation:
I need help on Chemistry?
ANYONE PLEASE?
Answers
Answer:
1. 1g/ml
Explanation:
1. Density is mass divided by volume (g/mL).
10g/10mL = 1 g/mL
2. When you already know the density and the volume, you can use the density as a unit converter.
[tex]5mL*\frac{20g}{mL} = 100g[/tex]
3. It's the same with density and mass.
[tex]20g*\frac{1mL}{5g} = 4mL[/tex]
What is your carbon footprint?
the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Answers
Answer:
c. .....................
Answer: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Your carbon footprint is the amount of carbon dioxide and other carbon compounds emitted, because of your use of fossil fuels.
Hope this helps!
A sealed 512 cm3 flask is full to capacity with 16 g of a substance. Determine the density of the substance.
Answers
Answer:
The answer is 0.031 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 16 g
volume = 512 cm³
We have
[tex]density = \frac{16}{512} = \frac{1}{32} \\ = 0.03125[/tex]
We have the final answer as
0.031 g/cm³Hope this helps you
There are 55.0 g of neon gas in a 3.0 L cylinder, the pressure is 4.5 atm what is the temp of the gas
Answers
Answer:
60.9 Kelvin
Explanation: First, write out everything that you know. You are tring to find the temperature, so the temperature will be represented by x.
Pressure (P)= 4.5 atm
Volume (V)= 3L
Number of Moles (n)= ?
Gas Consant (R)= 0.0821, if the pressure is in atm, that means r is 0.0821
Temperature (T)= x
We don't have all the information we need to plug the values into the equation. We still need to know how many moles 55.0 grans of neon is.
Ne in Grams= 55
Atomic Mass of Ne= 20.1797
55/20.1797= 2.7
moles= 2.7
Now that we have all the information we need, plug everying into the equation. In case you don't know, the Ideal Gas Law Equation is PV= nRT.
(4.5)(3) = (2.7)(0.821)x
x= 60.9
Now you have your temperature! It is 60.9 in Kelvin.
Which of the following atoms has the greatest ionization energy?
a.)W
b.)C
C.)d
P.)d
Answers
Answer:
helium
Explanation:
because there are no electrons screening it from the nucleus
An acid-base reaction of (r)-sec-butylamine with a racemic mixture of 2-phenylpropanoic acid forms two products having different melting points and somewhat different solubilities. Draw the structure of these two products. How are the two products related? Be sure to answer all parts.
Answers
Answer:
See explanation
Explanation:
When an optically active compound reacts with a racemic mixture, two different products appear .
Hence, when (R)-sec-butylamine reacts with a racemic mixture of 2-phenylpropanoic acid as shown in the image attached.
Enantiomers are optical isomers which are mirror images of each other. The image attached was obtained from Bartleby.
what is a likely oxidation
state of Chlorine?
a)-1
b) 7
C) -7
d) +1
Answers
Answer: a) -1
Explanation:
Through what process is heat transferred between the warmpair in front of a
fireplace and the cooler air on the other side of the room?
A. Radiation
B. Conduction
C. Convection
D. Absorption
Answers
Answer:
c-convection
Explanation:
i think it may help you and if its helpful plzz mark as brilliant
Which example illustrates a chemical change
shredding paper
smashing a soda can
burning wood
chopping wood
Answers
Solve for Keq , given the following concentrations at equilibrium. Based on the calculated Keq, are products or reactants larger?
CO2 = 3.0 M O2 = 1.5 M CO = 2.0 M
Answers
Answer:
it blows up very lighty
Explanation:
Based on the results the students record, which group makes the most accurate measurements of the object?
Answers
Answer:
B.
Explanation:
It’s because when you subtract 78.5 and 77.5 you get 1. And when you do 79.5 and 78.5 you get 1 too. I know this because I got the answer right
What phenomenon does the Coriolis effect arise from?
Answers
Answer:
because our planet is spinning
which means the objects near the equator are moving at much faster velocities than objects at higher latitudes
I hope this helps✌
Calculate the volume of this irregular solid to the nearest cubic centimeter.
What is the volume of the key?
Answers
Answer:
The answer is 8cm
Explanation:
:)
Answer:
8 cm
Explanation:
What type of graph can show a positive correlation, negative correlation, or no correlation?
A. Pie chart
B. Bar graph
C. Scatter plot
D. Line graph
Answers
Which best explains how photosynthesis is helpful to humans? OIt reduces the amount of harmful rays released by the sun. O It increases the levels of carbon dioxide in the air. O It provides oxygen for humans to breathe. OIt produces proteins, which humans can eat.
Answers
Answer:
C. sorry i am late :)
Explanation:
During photosynthesis, plants intake carbon dioxide from the air and releases oxygen. Thus, they are providing enough oxygen available for humans to breath.
What is photosynthesis?Photosynthesis is a bio-chemical process by which green plants produces chemical energy with the aid of light energy absorbed by chlorophyll. Photosynthetic reaction is the combination of carbon dioxide and water giving molecular oxygen and glucose.
Through photosynthesis, the amount ox oxygen and carbon dioxide in the atmosphere is balanced. This balancing cycle involves respiration of animals also.
The carbon dioxide that we exhale are up taken by plants and converts to oxygen gas. This makes sufficient oxygen for all animals to breath. Therefore, photosynthesis is a stage in carbon cycle and oxygen cycle.
To find more on photosynthesis, refer here:
https://brainly.com/question/29776072
#SPJ5
How much heat is released by a 15-gram sample of water when it is cooled from 40.oC to 30.oC?
Answers
Answer:
Q = -627.6 J
Explanation:
Mass, m = 15 grams
Initial temperature, [tex]T_i=40^{\circ} C[/tex]
Final temperature, [tex]T_f=30^{\circ} C[/tex]
We need to find the amount of heat released by this much of sample of water. We know that heat released is given by the below formula :
[tex]Q=mc\Delta T[/tex]
c is specific heat of water, [tex]c=4.184\ J/g-K[/tex]
[tex]\Delta T=T_f-T_i\\\\=(30^{\circ}-40^{\circ} )\ C\\\\=-10^{\circ} C\\\\=-10\ K[/tex]
So,
[tex]Q=15\times 4.184\times -10\\\\Q=-627.6\ J[/tex]
Hence, 627.6 J of heat is released and negative sign shows that energy is being given off.