Answer:
42
Explanation:
my brother said
true or false If beavers built a dam one stream, the kinds of plants and animals that lived around the stream would not be affected.
A container of carbon dioxide has a volume of 240 mL at a temperature of 22°C. If the pressure remains constant, what is the volume at 44°C?
Answer:
Volume of the [tex]CO_{2}[/tex] gas at 44°C is 258 ml.
Explanation
here,
using Charles' law ,
[tex]\frac{V}{T} =\frac{v}{t}[/tex]
where , V= initial volume v= final volume
T=initial temperature t = final temperature
Given - pressure is constant ,
so , putting the values -
V= 240ml
T= 22 + 273K = 295K (since converting celsius into kelvin that
is +273K )
v =?
t = 44+ 273K = 317K
Now , putting the given values in charles' law ,
[tex]\frac{240ml}{295K} =\frac{v}{317K}[/tex]
240ml x317K = v x 295K (through cross multiplication )
v =[tex]\frac{240ml\times317K}{295K}[/tex]
= 258ml .
thus , the volume of carbon dioxide in a container at 44°C IS 258ml .
Name:
1.
Which formula represents an ionic compound?
A. NaCI
B. N20
C. HCI
D. H2O
Answer:A
Explanation: because it represents a salt which is a nonmetal
6.(a) State any two ways by which water gets polluted.
(b) Name the components present in water gas.
Explain the similarities and differences between combination, decomposition,
and replacement reactions.
HELP PLEASE POINTS++++++++++++++ IMA MAKE BRAINLIEST
When vinegar, an acid, is mixed with baking soda, a base, the reaction is similar to the reaction of Alka-Seltzer and water; a salt, water and carbon dioxide are produced. In two or more complete sentences, describe how your knowledge of balancing chemical equations can help you to determine the missing compound. Write your answer in the essay box below. NaHCO3 + HC2H3O2 ⟶ ________ + H2O + CO2
Answer:
no.
Explanation:
you're prolly wondering why cuz this is revenge for your little game you did to me and whoops! i don't know the answer :) !
Metalliods have _______ proporties of metals and non metals.
a
both
b
neither
c
different
Answer:
A both
Explanation:
hope this helped
how many neutrons would 34 16 S-2 have? A. 16 B. 18 C. 20 D. 32
Answer:
Explanation:
For
32
S
2
−
, there are 16 protons, 18 electrons, and 16 neutrons.
Explanation:
The atomic number,
Z
, specifies the number of protons, positively charged, massive, fundamental particles present in the sulfur nucleus. This number defines the sulfur atom as a sulfur atom (i.e if there were 17 protons, the atom would be chlorine).
For a neutral atom, if there are 16 positive nuclear charges, there must necessarily be 16 negatively charged particles, 16 electrons, whizzing about the nucleus.
Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus.
And thus finally, if we have the
32
S
2
−
ion, there are 18 electrons, 16 protons, and 16 neutrons.
An atom can be defined by its properties:
Atomic number (Z): It is equal to the number of protons present in a neutral atom.Mass number (A): It is equal to the sum of the number of protons and the number of neutrons.An isotope is represented by the general notation of [tex]_Z^A\textrm{X}[/tex], where X is the symbol of an element.
For the given isotopic specie, [tex]_{16}^{34}\textrm{S}^{-2}[/tex], mass number is 34 and atomic number is 16.
Number of neutrons = Mass number - Atomic number
Put the value in the above formula.
[tex]\Rightarrow \text{Number of neutrons}=34-16\\\\\Rightarrow \text{Number of neutrons}=18[/tex]
So, the correct option is (G).
Learn more about neutrons in an atom here: https://brainly.com/question/19958244
The metal was known to have a density of 5.78 g/mL. A graduated cylinder was filled with 22.3 mL of water and after the metal was added the volume was 24.7 mL. What is the mass of the metal?
Answer:
The answer is 13.87 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density of metal = 5.78 g/mL
volume = final volume of water - initial volume of water
volume = 24.7 - 22.3 = 2.4 mL
We have
mass = 5.78 × 2.4 = 13.872
We have the final answer as
13.87 gHope this helps you
How many grams of calcium nitrate, Ca(NO3)2 (molecular weight 164), contains 24 grams of oxygen atoms?
a
41 g
b
96 g
c
62 g
d
164 g
Which is not a chemical element needed to build sugars?
Answer:
Nitrogen
Explanation:
21. Which of the following statements is true about ions?
a. Cations form when an atom gains electrons
b. Cations form when an atom loses electrons
C. Anions form when an atom gains protons
d. Anions form when an atom loses protons
I think its B cause...
When an atom loses an electron, it becomes a cation (positive ion). When an atom gains an electron, it becomes an anion. Ions are created when an atom loses or gains an electron. Atoms can never lose or gain protons, as this would change the fundamental identity of the atom.
if I'm wrong...please don't attack me
The cations are formed when an atom loses electrons.
• The positive ions produced by the loss of one or more electrons are known as the cations.
• The most commonly formed cations take place in the case of the elements, which involve the loss of all the valence electrons.
• The resulting cation exhibits the electronic configuration of the noble gas atom.
• The negative ions produced from the gain of one or more electrons are known as the anions.
Thus, the correct answer is option b, that is, the cations form when an atom loses electrons.
To know more about:
https://brainly.com/question/19026624
Which professional most likely uses X-ray technology?
a food critic
a dentist
a financial analyst
a pharmacist
Answer:
a dentist
Explanation:
MORE HELP ILL GIVE BRAINLY if correct
In two or more complete sentences explain how to balance the chemical equation,
Ca + N2 ⟶ Ca3 + N2 and include all steps.
Answer:
ca +n2 is impossible to get trough a ca3 +n2 so you have to try to find a reasnable question like ca+n2 = ca3n2 then you need witch is the same but the chimacl blanice is off so when mixing the chimcals try to reduce the can2
but also try to make it be a better salution
Explanation:
hope that helps also good luck
What are the three main technical support options for Microsoft users? Find It Myself, Ask the Community, Get Live Help Communities, Find It Myself, Guide Me Fix a Problem, Find It Myself, Communities Ask the Community, Get Live Help, Fix a Problem
Answer:
Find It Myself, Ask the Community, Get Live Help
Explanation:
The three main options for Microsoft users are Find It Myself, Ask the Community, Get Live Help. The first of which is finding it yourself through the search menu or help guidelines provided by Microsoft in all of their operating systems. Secondly, would be asking the community through search engines such as Google or through Microsoft help forums. Lastly, would be getting live help since Microsoft opertaing systems have a remote desktop feature that allows you to connect to another IT professional from a distance, or you can simply contact an IT professional to visit you in person for technical assistance.
Rocks that originated from the liquid phase are classified as
rocks.
Answer:
igneous rocks
Explanation:
igneus rocks are sometimes considered primary rocks because they crystallize from a liquid
PLEASE ANSWER ASAP!
For her school Science ft Alyssa designs an experiment to learn more about
erosion. Her experimental set up is shown below
Using the illustration shown above, determine which of the following statements best
describes the independent variable itest variable). this experiment:
A The speed she pours the water, since it is the same for all trials.
B The amount of water she pours, because the amount she pours is the same.
C The height of the tray, because this is a change that may cause and effect on the experiment.
D The mass of sand that collects at the bottom of the tray, because this is what is being measured or observed.
Answer:A
Explanation:
To do the experiment
The experimental setup is the part of the scientific method that is done to prove the hypothesis. The test variable of the experiment is the height of the tray as it may cause an effect. Thus, option C is correct.
What is the independent variable?The independent variable has been the test variable that does not depends on other variables and is manipulated by the researcher. It has no fixed value and parameter and is subject to alteration so as to cause an effect on the other variable.
The height of the tray is the independent variable and the mass of the sand is the dependent variable. The height affects the mass of the sand eroded at the bottom. The speed and amount of water have been the controlled variable.
Therefore, option C. the height of the tray with the sand is the independent variable.
Learn more about independent variables, here:
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#SPJ2
PLEASE HELP ASAP!!!
K+ has how many electrons?
-19
-18
-20
-none of these
Answer:
Its 19.
Explanation:
K (potassium) has 19 electron according to the atomic number in the periodic table. The atomic number tells you the number of protons and electrons.
A is a physical environment where a species lives and
becomes adapted,
a Nest
b Niche
C Habitat
d None of the above
Which has a greater energy, a photon of yellow light, or a photon of green light
Answer:
A photon of green light has a higher energy since it has a higher frequency than the yellow photon. And we can see that on the picture representation of the light spectre.
what is the difference between electron dot structure and lewis structures
Answer:
I hope this helps
Explanation:
Lewis symbols, which are also known as Lewis dot diagrams or electron dot diagrams, are diagrams that represent the valence electrons of an atom. Lewis structures, also known as Lewis dot structures or electron dot structures, are diagrams that represent the valence electrons of atoms within a molecule.
True or False: Clouds form when one condensation nucleus expands outward.
Answer:
False
Explanation:
Clouds are formed when air contains as much water vapor (gas) as it can hold. This is called the saturation point, and it can be reached in two ways. First, moisture accumulates until it reaches the maximum amount the volume of air can hold. The other method reduces the temperature of the moisture filled air, which in turn lowers the amount of moisture it can contain. Saturation, therefore, is reached through evaporation and condensation, respectively. When saturation occurs, moisture becomes visible water droplets in the form of fog and clouds.
Which of the following is a unit of density? = Mass / volume
A: liters per cubic gram
B:cubic meters
C:grams per cubic centimeter
D:square meters
Answer:
The correct answer is C.
Explanation:
To solve this problem, we should first recall possible units for mass and volume. Mass can be represented with units of grams, kilograms, etc. Volume has units of cubic meters, cubic centimeters, etc.
Therefore, since we know that density is mass divided by volume, the only answer that makes sense here is C. grams per cubic centimeter (where per signifies that grams are being divided by cubic centimeters).
Hope this helps!
how did robert hooke contribute to the cell theory?
A. he invented the microscope
B. he said cells can be created from other cells
C. he created cells in his lab
D. he was the first person to use the term “cells”
Answer:
D - He was the first person to use the term Cells.
Explanation:
Hooke invented the first compound light microscope (not first microscope) and he examined a cork and saw that it was made up of thousands of empty pockets which he later called 'Cells'.
Hope it Helps! :D
What is the mass of a dolphin swimming at 16 m/s with a momentum of 800 kg m/s?
Answer: 50 kg
Explanation: formula is
m= p/v
m=800 kg m/s : 16m/s
m= 50kg
idk tho hope this helps
evaporation
the process in which a solid changes directly into a gas (the term is
sometimes also used for the reverse process)*
CO
1
Chapter 3 Section 2
Which of the questions would involve the investigation of kinetic energy?
A. What material makes the strongest boat?
B. How does the color of a boat affect heat absorption?
C. Do boats float higher in salt or fresh water?
D. What is the effect of a boat’s shape on its speed?
Answer:
D. What is the effect of a boat’s shape on its speed?
Explanation:
Kinetic energy can be defined as the energy possessed by an object or body due to its motion. It is the amount of work required to accelerate an object or body with a specific mass from its point of initial rest to a final velocity.
Mathematically, kinetic energy (K.E) is equal to 1/2(mv²).
Hence, the question which would involve the investigation of kinetic energy is "what is the effect of a boat’s shape on its speed?" because speed is directly related to the motion of the boat. Generally, the shape of the hull of a boat has an effect on the speed of the boat.
Answer:
What is the effect of a boat’s shape on its speed?
How do scientists classify matter
according to their physical and
chemical makeup ?
Answer:
Matter can be classified according to
physical and chemical properties. Matter is anything that occupies space and has mass. The three states of matter are solid, liquid, and gas. ... Pure substances can be either chemical compounds or elements.
Question 2 of 10
What charge does an ion have if it has more protons than electrons?
O A. Neutral, since protons are inside the nucleus
B. A net positive charge
C. A net negative charge
O D. No charge
SUBMIT
Answer:
B. A net positive charge
Explanation:
a p e x 2021!
How subduction cause the formation of land mass like mountains and
volcano?
Answer:
Tectonic plates can crash into each other, and soil and dirt will shoot up, creating mountains and volcanos. This is how the Himalayas are actually said to form, when India crashed into Eurasia.
Hope this helps!