Answers
Answer:
A measurement is the action of measuring something, or some amount of stuff. So it is important to measure certain things right, distance, time, and accuracy are all great things to measure. Measurements can also allow us to make desicions based on the outcome of the measurement
Related Questions
A group of 6th-grade students constructs arguments on why water conservation is important. Which student argument is correct?
A.
Student 1 argues that people need water for recreation and transportation only.
B.
Student 2 argues that as the population increases in the world, so does the need for water.
C.
Student 4 argues that we use less water for agriculture and more on personal needs.
D.
Student 3 argues that there is an unlimited supply of water for animals, ecosystems, and people to use daily.
Answers
From a chemicals standpoint, Student 2 contends that as global population grows, so does the need for water. This is the correct reasoning.
What is the purpose of chemistry?
Our basic needs of food, clothes, shelter, health, energy, and pure air, water, and soil are all met by chemistry. Chemical technologies improve our quality of life in many ways by offering fresh approaches to issues with health, resources, and energy use.
What subjects are studied in chemistry?
The study of matter, including its properties, behaviours, and structures, is known as chemistry. Chemists induce and monitor these reactions both in nature and artificially in a lab setting because they are interested in how materials behave and react in specific settings.
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Which of the following molecules is polar?
Group of answer choices
CF4
CH4
CH3Cl
CO2
Answers
Answer
CH3Cl is polar amoungst the choices
Calcular la presión final de un gas que inicialmente está a 21°C y 0,98 atm. Sabiendo que su temperatura aumenta a 37°C.
Answers
Answer:
1.03 atm
Explanation:
Primero convertimos 21 °C y 37 °C a K:
21 °C + 273.16 = 294.16 K37 °C + 273.16 = 310.16 KUna vez tenemos las temperaturas absolutas, podemos resolver este problema usando la ley de Gay-Lussac:
T₁P₂ = T₂P₁En este caso:
T₁ = 294.16 KP₂ = ?T₂ = 310.16 KP₁ = 0.98 atmColocando los datos:
294.16 K * P₂ = 310.16 K * 0.98 atmY despejando P₂:
P₂ = 1.03 atmPLEASE HELP DUE SOON
Describe one piece of evidence that supports the big bang theory.
Answers
Answer: Red-Shift
Explanation:
It suggests that the universe is expanding, as distant stars/galaxies must be in motion away from us to cause the light to shift towards the red end of the spectrum (or into longer wavelengths of the EM spectrum). This agrees with the Big bang theory as that suggests the universe is expanding.
i need an essay about bow water bottles are ruining the earthh please ill give u a brainly
Answers
Answer:
Explanation:
Each bottle leaks harmful chemicals into our environment along the way as it decomposes. Studies show that the toxins decomposing bottles of water leach into our environment cause a variety of health issues, including reproductive problems and cancer.
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what is the pH of the 1.0 M KOH solution?
Answers
Answer:
So... pH of the 1.0" 10-2 mol-1 KOH is.. = 12What type of reaction is
Ammonia (NH3) breaking down into nitrogen gas and hydrogen gas
Answers
Answer:
Explanation:
Look at the reaction.
2NH3 ===> N2 + 3H2
It's a molecule that is breaking down to two elements on the periodic table. We used to call such a thing as a simple decomposition.
Which of the following wouldn't be a good tool to use when measuring pH values of solutions?
Question 8 options:
a)
litmus paper
b)
digital pH meter
c)
electrical conductivity meter
d)
pH paper
Answers
litmus paper
Because it will just tell if the solution is acidic or basic, it won't tell the pH
How does the equilibrium change to counter the removal of A in this reaction? A + B ⇌ AB The equilibrium shifts left. Simultaneously, there's an increase in the reverse reaction.
Answers
Answer:
The increase in the reverse reaction
Explanation:
Based on the LeCh's principle, a change in the concentration of a species in the equilibrium will shift the concentrations of the other species in order to counteract the effect of this change.
For example, for the reaction:
A + B ⇌ AB
Remove A in this reaction will produce the increase in the reverse reaction in order to increase the concentration of A.
A few Critical Thinking questions/creativity on the topic 'Particles of matter are very small'
Answers
Answer:
Any substance which occupies space and has mass is known as matter. States of matter: Matter exist in three different states that are Solid, Liquid and Gas. Matter is made up of very small particles
Explanation:
Which of these is an energy source for chemosythesis? Sunlight Moonlight Carnivores Sulfur molecules
Answers
Answer:
Sulfur molecules
Explanation:
Chemosynthesis can be defined as the process of producing the energy rich nutrients molecules from the chemicals. The chemosynthesis bacteria are those bacteria that are capable of absorbing chemicals from the ocean floor like hydrogen sulfide.
Thus it is a process of making energy rich molecules using the chemical energies.
In the context, sulfur molecules are the sources of energy for the process of chemosynthesis.
What is the rate law for this reaction? A + 2B → C + D
rate = k[A][B]2
rate = k[A]2 [B]2
rate = k[A]2 [B]
rate = k[A][B]
thanks!!
Answers
Answer: A:
K(A)(B)2
Explanation: gradpoint
A 2.8 g sample of pure metal requires 10.1 J of energy to change its temperature from 21°C to 36°C. What is this metal? Substance Specific Heat Gold 0.129 J/g °C Silver 0.237 J/g °C Copper 0.385 J/g °C Water 4.18 J/g °C
Answers
Answer:
Silver 0.237 J/g °C
Explanation:
We know that the heat required to raise the temperature of a given mass of a substance through a given temperature rise is given by;
H = mcθ
Where;
m = mass of the body
c = specific heat capacity of the body
θ = temperature rise
10.1 J = 2.8 g * c * (36°C - 21°C)
c = 10.1 J / 2.8 g * (36°C - 21°C)
c = 0.24 J/g °C
Four balls have the same temperature. Which ball has the most Thermal Energy? A.Golf ball(45g) B.Basket ball(625g) C.Bowling ball(5000g) D.Tennis ball(60g)
Answers
Answer:
b
Explanation:
b. ,u play with the ball, handle the ball grab the ball throw the ball exc.
2AgNO3 (aq) + BaCl2 (aq)
-->
2AgCl (s) + Ba(NO3)2 (aq)
Answers
2AgCl (s) + Ba(NO3)2 (aq)
What evidence is there that Potential energy is entering the system
Answers
Answer:
in particular 69-189 084 = 9283983
what is the cation called?
Answers
Answer:
Explanation:
HYDRONIUM
Answer:
hydronium
Explanation:
:0
All atoms of a given element must contain the same number of
A) protons
B) neutrons
C) electrons plus neutrons
D) protons plus neutrons
Answers
2) A solution consists of 0.50 mole of CaCl2 dissolved i
100. grams of H20 at 25°C. Compared to the boiling
point and freezing point of 100. grams of H20 at
standard pressure, the solution at standard pressure
has
(A) a higher boiling point and a lower freezing
point
(B) a lower boiling point and a lower freezing point
(C) a lower boiling point and a higher freezing
point
(D) a higher boiling point and a higher freezing
point
3) Which solution has the highest boiling point at
Answers
A. a higher boiling point and a lower freezing point
Explanation:
hope this helps :)
im I wrong on this question?
Answers
Answer:
I don't think so
Explanation:
That's what I got
If 20. milliliters of 1.0 M HCl was used to completely neutralize 40. milliliters of an NaOH solution, what was the molarity of the NaOH solution?
A) 0.50 M B) 2.0 M C) 1.5 M D) 4.0 M
Answers
Answer:
a)0.50
Explanation:
took one for the team :
HURRY I DONT HAVE TIME
Arrange the waves from highest energy to lowest energy.
Answers
Hope this helps :D
Fossil fuels are called nonrenewable resources because
A
they were made by dinosaurs, which are extinct.
B
it is impossible for humans to make more in our lifetimes.
с
they are easy to replace whenever they run out.
D
it is possible to use them for many different purposes
Answers
Answer:
The Answer is B
Explanation:
Fossil fuels take millions of years to be made, and every other answer doesn't make sense
How does La Niña affect the climate of the Pacific Ocean?
1.The warm water moves toward the east.
2.The cold water sinks deeper into the ocean.
3.The ocean becomes cooler.
4.The strength of the prevailing winds decreases
Answers
The statement in which La Niña affect the climate of the Pacific Ocean is "The cold water sinks deeper into the ocean."
What is La Niña effect?La Niña is a climate phenomenon that depicts the cooling of surface ocean waters along the coast of South America's tropical west coast.
What is climateThe average weather in a certain place over a longer length of time is referred to as climate.
The jet stream moves northward and weakens across the eastern Pacific as a result of La Niña. The South experiences warmer and drier weather than usual during La Nia winters. The North and Canada are wetter and colder than the rest of the country. The seas off the Pacific coast are cooler and contain more nutrients than typical during La Niña.
Water in the eastern Pacific is colder than typical because to La Niña. El Niño might cause the water to be warmer than usual in the same place. During La Niña years, drought-stricken areas are drenched, while El Niño years are drenched.
Hence the correct option is 2.
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Which of the following is NOT a function of the muscular system
Answers
Answer:
where are the answer choices
Explanation:
1. For the reaction below, which change would cause the equilibrium
to shift to the right?
CH.(g) + 2H,S(g) + heat
CS,(g) + 4H,(g)
(a) Decrease the concentration of H,S.
(b) Increase the pressure on the system.
(c) Increase the temperature of the system.
(d) Increase the concentration of CS,
(e) Decrease the concentration of CH,
can someone also help me answer the rest of the questions so i can check my work thank you
Answers
Answer:
option A
decrease in the concentration will light up the reaction so it will shift to right side
What two things combine with oxygen to form ground-level ozone?
A) NOx and ODS
B) CFCs and halons
C) NOx and VOC
D) HFCs and HCFCs
Answers
Answer:
c) NOx and VOC
oxides of nitrogen (NOx) and volatile organic compounds (VOC)
Explanation:
-
A sample of gas is held at constant temperature. The gas is in a container with a moveable piston. The gas is
compressed into a small volume. What will happen to the pressure?
Answers
Answer:
The pressure of the gas will increase.
Explanation:
This concept of change in state properties of gas, when compressed in a moveable piston-cylinder assembly, can be explained by using Boyle's law
Boyle's law states that the pressure of a given mass of gas is inversely proportional to its volume given that temperature remains constant.
Following this law, when the gas in the container is compressed to a smaller volume, the pressure will go up.
This is also because the gas is not free to move about without frequent collisions with itself and the walls of the container, due to the resulting smaller space after compression. Therefore, the force it exerts on the walls of the container and the frequency of collision are more.
which of the following
groups of elements are all
metallic
Answers
Answer:
metallic element are those ones from group 1 to group 3
your answer would be - aluminum, copper, potassium
(even though you didn't list the options)
Petroleum is a mixture of hydrocarbons. It is separated into useful fractions by fractional distillation.
Which property does fractional distillation rely on to separate petroleum?
Answers
Explanation:
Fractional distillation is used to separate crude oil into simpler, more useful mixtures . This method can be used because different hydrocarbons have different boiling points
Hope this help u