Answer:
alkali metals
Explanation:
alkali metals
The alkali metals, found in group 1 of the periodic table (formerly known as group IA), are very reactive metals that do not occur freely in nature. These metals have only one electron in their outer shell. Therefore, they are ready to lose that one electron in ionic bonding with other elements.
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1395 +3.4
What is the answer
Answer:
1398.4
Explanation:
Use a calculator
Honestly didnt even need to
Can an element be a compound? Explain?
Answer:
Yes
Explanation:
A compound is a pure substance composed of two or more different atoms chemically bonded to one another. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.
Laboratory equipment is cleaned and properly stored after use primarily so that
chemical products can be measured and recorded as data
time is saved in setting up the next experiment
toxic materials can be kept in the laboratory
the possibility of contamination in the laboratory is minimized
Answer:
The last option is the correct option
Explanation:
Laboratory equipment and work benches are cleaned (and stored properly in the case of equipment) after use so as to keep them free of the purpose it has been used for, which if not done, could lead to various undesirable events/aftermath. For example, if dyes or grease is used in a process in the laboratory, these compounds need to be washed off the glasswares (like measuring cylinder) it was poured in during the course of the experiment to prevent the glassware from retaining some of it's residual particles hence contaminating the glassware for future laboratory use. Cleaning must be done on the surfaces the experiment was carried out also for the same reason.
Hence, the correct option is the possibility of contamination in the laboratory is minimized.
When a cell duplicates itself and splits into 2 cells it is called mitosis.
Which statement about the cells is correct?
ANSWER CHOICES
A Group of answer choices
B There is no genetic information in the new cells.
C None of these answers are correct.
D The cells are demonstrating cell theory; cells come from pre-existing cells.
E The cells will be damaged and die
Answer:
The answer is D
Which element is in Group 17 and has more than 50 protons but less than 75 protons?
Answer:
Iodine
Explanation:
Iodine is in group 17 on the periodic table (first picture attached). The second picture shows you in the top left-hand corner of Iodine's little square, there is the number 53. This is the atomic number, it is also the number of protons and electrons in an element.
Hope this helped :)
Can someone help me please!! Apex
What does the mass number represent?
A. The average charge of all ions of the element
B. The sum of the masses of all the isotopes
C. The sum of the atomic numbers of all the isotopes
D. The average mass of all isotopes of the element
Answer:
It is D
Explanation:
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if the (H+) is 2.1×10^-12 MHCIO4, What is the PH? is the solution ACIDIC, BASIC or NEUTRAL.
Explanation:
The pH of a substance can be found by using the formula
[tex]pH = - log[ H^{ + } ][/tex]
where [ H+ ] is the hydrogen ion concentration in the substance
From the question
[ H+ ] = 2.1 × 10-¹² M
To find the pH substitute the value into the above formula
We have
[tex]pH = - log(2.1 \times {10}^{ - 12} ) \\ = 11.6777807 \: \: \: \: \: \: [/tex]
We have the answer as
pH = 11.7The solution is basic since it lies in the basic region that is from 8 to 14
Hope this helps you
Do it and I will give brainliest
Answer:
Hi there!
Your answer is
Mass: 12
&
Electrons:5
Explanation:
The electrons in a neutral atom is the same as the # of Protons!
Which of the following is NOT a source of dissolved oxygen in the water?
A. humans going underwater and exhaling
B. diffusion from the atmosphere
C. aeration as water moves over rocks and debris, and from wind and waves
D. photosynthesis of aquatic plants
Answer:
A. humans going underwater and exhaling
Explanation:
Dissolved oxygen is the oxygen content that can be found in a water body. Oxygen is a gaseous component that dissolves readily in water, however, oxygen dissolves in water via the following sources including diffusion from the atmosphere, aeration as water moves over rocks and debris, and from wind and wave, photosynthesis of aquatic plants.
Humans like every other living organism will undergo cellular respiration and release CO2 (carbon dioxide gas) as a a product during exhalation. Hence, humans going underwater and exhaling cannot be a source of dissolved oxygen.
Identify whether each element is a halogen, a noble gas, or nonmetal only.
Astatine (At):
Nitrogen (N):
Krypton (Kr):
Chlorine (Cl):
Sulfur (S):
Answer:
(At)halogen
(N)nonmetal only
(Kr)Nobel gas
(CI)halogen
(S)nonmetal only
Explanation:
Answer:
(At): Halogen
(N): Nonmetal only
(Kr): Noble Gas
(Cl): Halogen
(S): Nonmetal only
Explanation:
Took the test on edge!
Sorry if its wrong but it shouldnt be.
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1. How many miles are in 1,000,000 centimeters?
Answer:
6 miles.
Explanation:
There is a lot of decimal points after it. But you just need to convert everything. But if you round it to the nearest whole, it would be 6 miles.
Answer:
Ex1,000,000 Centimeters =
6.2137119 Miles
planation:
What are intermolecular forces?
A sample in lab displaces 15 mL of water in a graduated cylinder. When placed on a scale the mass is 8.7 g. What is the density of the sample.
Explanation:
Density: mass/volume
8.7/15= 0.58 grams per milliliter
This answer can't be accurate because the question doesnt state the initial volume of water and the mass of the graduated cylinder itself
3. SE7.12D The cell organelle responsible for providing energy for cell processes in plant
and animal cells is the -
You are inviting 32 friends, you estimate that each friead will eat 2.5 slices of pizza, on average, each pizza contains 8 slices, and there is a deal where you can buy 2 pizzas for $15
Answer:
$75
Explanation:
32(2.5) = 80 slices
80 slices / 8 slices = 10 pizzas
10/2 = 5 two pizza deals
5 x 15 = $75
A single measurement system that scientists all over the world have agreed on adopted in 1960 by the General Conference on Weights and Measures; has seven base units, and most other units are derived from these seven?
Answer:le système international d’unite(SI)
Explanation:
Which describes any substance that shatters or breaks easily?
malleable
brittle
volatile
ductile
Answer:
Brittle
Explanation:
Its the most easy thing to break.
The substance that breaks easily or shatters is brittle. As malleable and ductile are hard in nature and volatiles are types of solute. Thus, option B is correct.
What are brittle substances?These substances are hard and rigid but contain little tensile strength that is they can be broken down into pieces easily on applying a little amount of pressure.
They have little deformation and poor capacity for conduction of current with high compressive strength and low tensile strength.
On applying pressure they fracture with little elastic deformation and some examples of it are some alloys with low plasticity, glass, and graphite. Their breaking is also known as brittle breakage.
Ductile are stiff and unable to break and the volatiles are type of solute easily dissolve in water malleable and are unbreakable or difficult to break. These all are the bad conductor of electricity.
Therefore, brittle is the substance among these which breaks. Thus, option B is correct.
Learn more about brittle substances, here:
https://brainly.com/question/14313045
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what would cause water to turn from a gas to a liquid
Answer:
When you heat something up, it makes the molecules move faster. ... When this happens, all of the molecules go flying apart and become a gas (like when you boil water to make steam). The process of gas molecules leaving the liquid to go into the gas is called "evaporation." The opposite process is called "condensation.
XxAnimexXWhat is the movement of one plate below another
called?
Answer:
Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs are known as subduction zones.
Explanation:
Hope this helps :D
Answer:
subduction
Explanation:
hope this helps
Is the air that we breathe an element, compound, mixture, or pure substance?
Element
Pure substance
O Mixture
Compound
0.000786 written in scientific notation is?
how many kilograms are in a 50 pound luggage bag?
Which of the following would be one of the interacting parts in a weather system?
CLOUDS would be one of the interacting parts in a weather system.
What is the density of a block of wood that has a mass of 125grams and volume of 25.6mL?
name physical properties
Answer:
Some examples of physical properties are:
color (intensive)
density (intensive)
volume (extensive)
mass (extensive)
boiling point (intensive): the temperature at which a substance boils.
melting point (intensive): the temperature at which a substance melts.
Explanation:
Hope this helped! <3
the density of mercury is 13.6 g/cm3 what is the mass of 8.20 ml of mercury
Answer:
The answer is
111.52 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 mercury = 13.6 g/cm³
First we must convert the volume from mL to cm³
if 1 mL = 1 cm³
Then 8.20 mL = 8.20 cm³
volume = 8.20 cm³
The mass of mercury is
mass = 13.6 × 8.2
We have the final answer as
111.52 gHope this helps you
Derek didn't use all the HCl that he poured out for an
experiment. He decides to store the rest in an aluminum
can. What do you tell him.
ut of
question
Select one:
a. Nothing. Aluminum is a safe non-reactive metal for
storage of acids.
b. Hydrochloric acid is flammable in the presence of
aluminum.
c. The reaction of the acid and the aluminum can will
turn the can ice cold.
d. The acid is likely to eat through the can.
Answer:
d. The acid is likely to eat through the can.
Explanation:
Aluminium is a metallic element found in group 3 of the periodic table. Aluminum is a very reactive metal owing to the fact that it reacts with almost every substance it comes in contact with e.g air, acids, bases etc.
In this question where Derek stores his Hydrochloric acid (HCl) remnant, after an experiment, into a can made of aluminum. What will happen is that the acid is likely going to eat through the can. This might occur gradually but will eventually. Aluminum protects itself from further reactions by forming a layer of Aluminum oxide (Al2O3) when it reacts with air.
This is what keeps the reaction with HCl gradual but the acid will eventually permeate the layer and corrode the aluminum can by reacting with the aluminum.
2. The three sub-atomic particles that make up the atom are
Answer:
Protons
Neutrons
Electrons
Explanation:
According to Dalton’s atomic theory, atoms:
A.are destroyed in chemical reactions.
B.can be divided.
C.of each element are identical in size, mass, and other properties.
D.of different elements cannot combine
Answer:
C
Explanation:
Dalton's atomic theory are: Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. The atoms of different elements vary in size and mass.
Dalton's atomic theory opines that atoms of the same element are identical in size, mass, and other properties and are different from atoms of other elements.
In addition, Dalton theorized that atoms can neither be created nor destroyed, and they are the smallest indivisible particle of elements.
He also proposed that atoms of different elements are also able to combine in whole number ratio to form compounds.
More on Dalton's atomic theory can be found here: https://brainly.com/question/13157325?referrer=searchResults
3. Why do you think it is important that an erosion control blanket
break down after a few weeks or months?
Answer:
The primary purpose of erosion control blankets is to keep soil from shifting or moving. They help stabilize soil particles and sediments, holding them in place to prevent sliding due to water, wind or other natural causes.
Explanation:
