Answer:
44.01
Explanation:
12.01 + 16.00 + 16.00 = 44.01
How long does it take for 87.5 % of each isotope(Krypton-73, Krypton-74, Krypton-76, and Krypton-81) to decay?
Which change to the setup is least likely to cause an increase production of bubbles?
Adding a bright light source.
Adding a source of carbon dioxide to the water.
Adding a different fluid to the water.
Adding a second plant to the test tube.
Answer:
D, adding a second plant to the test tube
How many H2O molecules are in 2 mol
Answer:
A mole of horses would be Avogadro number of horses (a lot actually !). Avogadro number is 6.023 x 10(23). A mole of H (hydrogen) atoms contains 6.023 x 10(23) H atoms. A mole of H2 molecules contains 6.023 x 10(23) H2 molecules or 2 moles of H atoms (since each molecules has 2 atoms).
Explanation:
Answer:
A mole (mol) is the amount of a substance that contains 6.02 × 10 23 representative particles of that substance. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number. There are therefore 6.02 × 10 23 water molecules in a mole of water molecules.
Explanation:
On a .75-meter table sits a book whose mass is .5 kilograms. How
much Potential energy does it have?
Answer:
P.E = 3.675 J
Explanation:
Given data:
Height of table = 0.75 m
Mass of book = 0.5 kg
Potential energy = ?
Solution:
Formula:
P.E = mgh
g =acceleration due to gravity = 9.8 m/s²
by putting values,
P.E = 0.5 kg× 9.8 m/s² ×0.75 m
P.E = 3.675 kgm²/s²
J = kgm²/s²
P.E = 3.675 J
Answer:
[tex]\boxed {\boxed {\sf 3.675 \ Joules}}[/tex]
Explanation:
Gravitational potential energy can be found using the following formula.
[tex]E_p=m*g*h[/tex]
Where m is the mass, g is the gravitational acceleration, and h is the height.
The mass of the book is 0.5 kilograms. The acceleration due to gravity on Earth is 9.8 m/s². The height of the book is 0.75 meters.
[tex]m= 0.5 \ kg \\g= 9.8 \ m/s^2 \\h= 0.75 \ m[/tex]
Substitute the values into the formula.
[tex]E_p=(0.5 \ kg)(9.8 \ m/s^2)(0.75 \ m)[/tex]
Multiply.
[tex]E_p=(4.9 \ kg*m/s^2)(0.75 \ m)[/tex]
1 kg*m/s²= 1 Newton[tex]E_p=(4.9 \ N)(0.75 \ m)[/tex]
[tex]E_p=3.675 \ N*m[/tex]
1 N*m= 1 Joule[tex]E_p=3.675 \ J[/tex]
The book has 3.675 Joules of gravitational potential energy.
when it is cold in your house
Answer:
yep.
Explanation:
I love to wear oversized hoodies and I get soft comfy blankets and watch movies. Have a nice night! :)
Which of the following are physical properties?
1. Water freezes at 0°C.
2. Diamonds are the hardest known substance.
3. Sugar is capable of dissolving in water.
4. Vinegar reacts with baking soda.
5. Most metals are malleable.
6. Most metals react with acids.
7. The density of acetic acid is 1.05 g/mL.
8. The length of a piece of aluminum foil is 12.2 cm.
9. Copper conducts electricity.
Answer:
1,2,3,5,7,8,9
Explanation:
are all physical properties
How many total valence electrons are found in the following molecules: CO3
Answer:
The Carbonate (CO2−3) Ion
Unlike O3, though, the actual structure of CO32− is an average of three resonance structures. 2. Carbon has 4 valence electrons, each oxygen has 6 valence electrons, and there are 2 more for the −2 charge. This gives 4 + (3 × 6) + 2 = 24 valence electrons
Explanation:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d8
What element is represented by the ground state electron configuration shown above?
Answer:
Pd (palladium).
Explanation:
46 electrons total, this is representative of the Pd (palladium) element.
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Palladium (Pd) element is represented by the ground state electronic configuration.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
The ground state electronic configuration of 1s² 2s² 2p⁶3s² 3p⁶4s² 3d¹⁰ 4p⁶ 5s² 4d⁸ shows total 46 electrons. The element with atomic number 46 is palladium, Pd. Palladium is a d block element. Palladium is found in group 8 and period four of periodic table.
Therefore, palladium (Pd) element is represented by the ground state electronic configuration.
To know more about element, here:
https://brainly.com/question/8460633
#SPJ3
Genetics is the study of
Which device converts the mechanical energy of a spinning magnet into electrical energy?
How are S waves and surface waves similar?
Both arrive after P waves.
Both compress the ground.
Both travel through liquids.
Both produce minimal ground motion.
I will give out brainliest
Answer:
The answer to this question is A. Both arrive after P waves
Explanation:
Because since P waves always come first surface and S waves come after.
what is diatomic element?
Answer:
it is molecular of an elements that consists two atoms
14. HCOOH is an example of
A. alcohols.
B. aldehydes.
C. carboxylic acids.
D. ethers.
E. ketones.
Answer:
carboxylic acid is the answer
Explanation:
Plz mark brainliest
Divergent tectonic plate boundaries most commonly form one: A non-volcanic islands. B ocean trenches C continental mountains D ocean ridges
Answer:
D. ocean ridges
Explanation:
Answer:
I think A
Explanation:
Most volcanoes form at the boundaries of Earth's tectonic plates. ... The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries
Which of these are qualititative descriptions?
A
Horror Films
B
78 Baboons
C
1 Dollar
D
1,000,000,000 Nugget
22.
An example of amphoteric oxide is
A. Al2O3.
B. CaO.
C. Cuo.
D. SiO2.
E. K20.
Fu** please help
Answer:
A (option) .............
Answer:
Al2O3
Explanation:
ZnO,Al2O3,PbO2 are some of the amphoteric oxides
Amphoteric oxides are metal oxides that can react with both acids and bases,so Aluminum oxide can react with both HCl and Sodium hydroxide which is a base
what is ideal gas constant?? g0ogle doesnt got any good answerss
Answer:
An ideal gas is a gas with particular characteristics.
Explanation:
The particles have no volume All collisions between particles are elastic collisions and lose no kinetic energy The particles neither attract each other nor repel They have random movementIdeal gases are hypothetical which means that they do not exist in their true form.
hope this helps, pls mark brainliest :D
List all the layers of the atmosphere and give one SENTENCE description or characteristic for each layers.
Answer:
Troposphere, stratosphere, mesosphere, and thermosphere.
Explanation:
Troposphere - It is the lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere.
Stratosphere - It is the layer of the earth's atmosphere above the troposphere, extending to about 32 miles (50 km) above the earth's surface (the lower boundary of the mesosphere).
Mesosphere - It is the region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
Thermosphere - It is the region of the atmosphere above the mesosphere and below the height at which the atmosphere ceases to have the properties of a continuous medium. The thermosphere is characterized throughout by an increase in temperature with height.
Answer:
The First layer is the troposphere. The troposphere is what we live in. It creates weather for us. Second layer is the Stratosphere. You will find the ozone layer in it. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection. Third layer is Mesosphere. The Mesosphere is very important for earth's protection. The mesosphere burns up most meteors and asteroids before they are able to reach the earth's surface. Fourth layer is Thermosphere. The Thermosphere absorbs the sun radiation making it very hot.
Explanation:: I don't know if you include this one but the fifth layer is the Exosphere. Although the exosphere is the most distance layer of earth's atmosphere it is the layer that is the planet's first line of defense against the sun's rays. It is also the first layer to come into contact and protect the earth from meteors, asteroids, and cosmic rays.
1. What three characteristics determine the type of sedimentary rock?
Answer:
Characteristics of Sedimentary Rocks. ● The color of the sedimentary rock is determined by the content of the strata that were pressed together to form it. If the layers have a high organic content, the rock is usually gray to black in color. On the other hand, high amount of minerals give the rock the color of the mineral.
Hopefully, this helps! :D
Answer:
texture
color
and another one is, well
Complete the passage:
During the process of polymerization____
combine by sharing electrons. This process forms a
,____which is made of repeating subunits. The resulting material is used in a variety of ways.
Answer:
During the process of polymerization, monomers
combine by sharing electrons. This process forms a polymer, which is made of repeating subunits. The resulting material is used in a variety of ways.
Answer:
monomers and polymer.
Explanation:
An object that mass a lot of mass for a unit volume is said to be very: O high in calories There is not enough information to answer the question dense O loud O None of these answers
Answer:
There's not enough information because it just says "a lot of mass" no definite numbers or "masses"
HELPP ASAP
What do the colors on the periodic table show?
A. which element it is
B. the metallic properties of the element
C. the types of compounds the element can make
D. whether the element is a solid, a liquid, or a gas at room temperature
Answer:
Periodic tables can use color to identify other element characteristics. For example, an electronegativity periodic table color codes the elements based on how electronegative they are. The valence periodic table uses color to identify the most common valence state for each element.Oct 2, 2019
pls like and rate us .
The color given to a the elements in periodic table is to characteristics of the elements mainly to identify whether they are solid, gas or liquid. Thus option D is correct.
What is periodic table?A periodic table contains all the discovered elements which are classified into different groups and periods. Groups are vertical columns of elements with similar properties and same number of valence electrons.
Periods are horizontal rows from left to right with an increase in atomic number. There are 18 groups and 7 periods in periodic table. Each group has given each color and some elements showing exceptional characteristics such as hydrogen and helium have separate colors.
All the first group elements called alkali metals have one color and the second groups elements with another color, All the d-block elements are given the same colour and metals in p-block elements have the same color.
Similarly, all the metalloids have one color and all other gases have the same colour in which inert gas group and halogen group have seperate colours.
Hence, the color in periodic table helps to identify the element's nature like its state also. Thus option D is correct.
To find more about periodic table, refer the link below:
https://brainly.com/question/11155928
#SPJ2
hhelp will give brainliest
Answer: pretty sure it is D
Answer:
its the last one
Explanation:
How does knowing the meaning of prefix-trans help you remember what happens to light that strikes a translucent object ?
Explanation:
The prefix trans- and its variant tra- mean "across".
A translucent substance allows some light to go "across" it to the other side. Also, think about a transparent substance: it allows light to go "across" it; or a translation, it is a going "across" from one language into another.
uses of indicators in points?
Answer:
The common application of indicators is the detection of end points of titrations. The colour of an indicator alters when the acidity or the oxidizing strength of the solution, or the concentration of a certain chemical species, reaches a critical range of values.
What is the molecule that formed between B and F?
Answer:
BF3
Explanation:
For this question, you need to use the number of valence electrons present in each element. Boron is in group 3/13 on the periodic table so you know it has 3 valence electrons while Fluorine is in group 7/17 so it has 7 valence electrons. These elements are both covalent so they will share electrons. All elements in the first three rows want to reach either have 8 valence electrons or zero valence electrons depending on whichever is easier. When B and F interact each Fluorine will only want to take one electron, but Boron wants to get rid of all 3 electrons, so it will bond with 3 Fluorine to get rid of all its valence electrons.
I hope this helps.
Determine the products of this unbalanced reaction: Select all that
apply
Ba
+
N2
-
Ba3N2
BaN2
Ba2N
BaN
BaNO2
Answer:
Ba3N2
Explanation:
valency of barium is+2and nitrogen is-3.
What is the molecular formula of sodium peroxide by criss cross method
Answer:
Na2O2
the formula of sodium peroxide
How many atoms are in a 0.50 g sample of helium
how many grams are in 22.3 mole of Copper (II) Hydroxide?
Answer:
2180 g Cu(OH)₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
22.3 mol Cu(OH)₂
Step 2: Identify Conversions
Molar Mass of Cu - 63.55 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H - 1.01 g/mol
Molar Mass of Cu(OH)₂ - 63.55 + 2(16.00) + 2(1.01) = 97.57 g/mol
Step 3: Convert
[tex]22.3 \ mol \ Cu(OH)_2(\frac{97.57 \ g \ Cu(OH)_2}{1 \ mol \ Cu(OH)_2} )[/tex] = 2175.81 g Cu(OH)₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
2175.81 g Cu(OH)₂ ≈ 2180 g Cu(OH)₂