Answer: [tex]BaF_{2}[/tex]
Explanation: Because barium is in Group 2, it forms ions with a charge of +2. Fluorine, in Group 17, form ions with a charge of -1. Cross the charges to get the subscripts (Since Ba has a charge of +2, F has a subscript of 2. Because F has a charge of -1, Ba needs a subscript of 1). Therefore, a formula unit of the compound is [tex]BaF_{2}[/tex].
Think of a substance that does not dissolve in water. Any Examples?
Answer:
sand, flour, water
Explanation:
Some substances that don't dissolve in water:
- sand
-flour
-oil
-fats
-plastics
Molecules in a gas have lots of energy and spread out even more than molecules in a liquid. Warm water has more energy than cold water, which means that molecules in warm water move faster than molecules in cold water. If the atoms of an object are moving fast, the temperature would be
High
Low
Medium
Unknown
Answer:
High
Explanation:
The answer to this question has been hinted in the question;
molecules in warm water move faster than molecules in cold water
This means that the relationship between temperature and movement of atoms is as follows;
At higher temperatures, atoms possess more energy and due to this they are able to move at high velocity (really fast).
On the other hand, lower temperatures means that the atoms possess less energy and due to this they move with a lower velocity.
Help me plzz and thank u
Answer:
the terminator because i did this test
Problem
Atoms of which two elements have a combined total of 39 protons?
A Nickle, Ni, and copper, Cu
B None of these
CPotassium, K, and calcium, Ca
DNitrogen, N, and oxygen, O
Submit Answ
Type here to search
Answer:
C) Potassium, K, and calcium, Ca
Explanation:
Given pair of elements:
Ni and Cu
Potassium and Ca
Nitrogen and oxygen
Solution:
We know that number of protons and number of electrons are always equal and number of electron or number of proton is called atomic number.
Number of protons given elements:
Ni number of protons = 28
Copper number of protons = 29
Combine number of protons = 57
K number of protons = 19
Ca number of protons = 20
Combine number of protons = 39
Ni number of protons = 7
O number of protons = 8
Combine number of protons = 15
Thus, option C is correct.
Can someone please answer any of these?
Answer:
A polar covalent bond is defined as the bond which is formed when there is a low difference of electronegativities between the two non metals. Example: Phosphorous and chlorine, Nitrogen and hydrogen
Non-polar covalent bond is defined as the bond which is formed when there is no difference of electronegativities between the atoms. Example: Oxygen and oxygen
Ionic bond is formed when there is complete transfer of electron from a highly electropositive metal to a highly electronegative non metal. The electronegative difference between the elements is high. Example: Potassium and chlorine
Select the correct location on the image.
Identify the apparatus on the table that is best suited for a chemist to measure the volume of a liquid.
Answer:
The third one from the left–the graduated cylinder.
Explanation:
The laboratory apparatus that gives an "accurate" or "precise" measurement of a liquid's volume is the graduated cylinder. All you have to do is to pour the liquid into the cylinder and read its measurement using the calibrated scale.
The graduated cylinder comes in different sizes, which means the scale divisions will depend on its size. When reading the measurement, it is important to take note to read at the bottom of the meniscus because it gives the most accurate volume.
Answer:
graduated cylinder
Explanation:
What chemical compound is H4PN?
Answer:
Diphosphane
Explanation:
Hope it helps
which of the following situations violates the law of conservation of energy?
A. a ball dropped from the top of a building in speed until it hits ground
B. a block sliding freely on level ice increases in speed until it hits a wall
C. A child playing on a swing moves fastest at the bottom of the swing's path
D. The height a ball bounces decreases with each bounce
Answer:
A. a ball dropped from the top of a building increases in speed until it hits the ground.
A ball dropped from the top of a building in speed until it hits ground is the situations violates the law of conservation of energy. Therefore, option A is correct.
What is the law of conservation of energy ?According to the law of conservation of energy, energy is neither created nor destroyed. When you roll a toy car down a ramp, and it collides with a wall, the energy is transferred from kinetic to potential.
Energy conservation does not imply energy savings. Instead, energy is neither created nor destroyed, according to the law of conservation of energy. When people use energy, it does not vanish. Energy is transformed from one form of energy to another.
The law of conservation of energy is violated when a ball is dropped from the top of a building at high speed until it hits the ground.
Thus, option A is correct.
To learn more about the law of conservation of energy, follow the link;
https://brainly.com/question/29775341
#SPJ6
The energy of the emitted electrons depends on the
1. exposure
2. frequency
3. intensity
of the light.
Answer:
2. Frequency
Explanation:
Edge 2021
Write down and Balance
the chemical equation
Hydrogen + Oxygen=Water
What form of energy causes the chemical reaction in photosynthesis?
Answer:
Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Explanation:
Answer:
Radiant energy (from the sun)
Explanation:
4 In which medium would an electromagnetic
wave travel the fastest?
A. air
C. vacuum
B. granite
D. water
Answer:
the correct answer is air.
Answer:
water
Explanation:
the medium an electromagnetic wave travel the fastest is in water
The vertical columns on the periodic table can be called families or?
The vertical columns may also be called "groups".
What is a microbiome?
Answer:
A microbiome is the community of micro-organisms living together in a particular habitat.
Explanation:
Tikiya is conducting experiments on samples of pure copper (Cu). While collecting data, Tikiya records both physical and chemical properties of the metal. Which of the following is dependent on the amount of copper particles in the sample? A. Electrical conductivity B. Thermal conductivity C. Mass D. Density
Answer: Mass
Explanation: I had the same question hope its right for you
Why does sulfur stink so bad?
Answer:
Since pure natural gas (a.k.a. methane) has no smell, utility companies add smelly, sulfur-containing odorants called mercaptans, or thiols, to warn us if anything is amiss with our pipelines. ... Olfactory receptors are present in specialized sensory cells called olfactory sensory neurons, which line our noses
Explanation:
hope this helps have a good rest of your night :) ❤
Three students shine lights onto the same spot on a white table. One student shines a blue light. Another student shines a red light. The third student shines a
green light. What color will the spot appear to be?
black
B orange
white
yellow
Help plz asap
What element has an energy level Electron Configuration of 2-8-18-8?
Argon
Calcium
Krypton
Chlorine
answer:
krypton.
explanation:
it is a noble gas, so has full-valence shell. also, reference back to the periodic table.
-- please mark the brainliest and click the thanks button if correct :)
Metamorphic rock is formed from the weathering, erosion and cementing of sediments.
True
False
Answer:
False
Explanation:
Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
This question is reffering to sedimentary rocks, so it's false.
Answer:
Weathering (breaking down rock) and erosion (transporting rock material) at or near the earth's surface breaks down rocks into small and smaller pieces. When the molten rock cools it forms an igneous rock. Metamorphic rocks can form from either sedimentary or igneous rocks.
Explanation:
True
the question is a picture pls help
The unknown alcohol = 2-propanol
Further explanationGiven
volume = 50 ml
mass = 39.4 g
Required
The unknown alcohol
Solution
Density of sample :
= mass : volume
= 39.4 g : 50 ml
= 0.788 g/ml
The unknown alcohol at room temperature = liquid, so the unknown alcohol is 2-propanol because it has temperature range between -90 to 82 for liquid and the density = 0.788 g/ml
The liquid inside the cell is called
Answer:
The cytoplasm
Explanation:
Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and various organic molecules. Some intracellular organelles, such the nucleus and mitochondria, are enclosed by membranes that separate them from the cytoplasm.
Pls mark as brainliest
hope this helps:)
Which of the following is an example of chemical energy being used?
A.Eating a sandwich
B.Reading a book
C.Switching on a fan
D.Turning on the light
I feel like it's C. or D. but I guess it's C.
I NEED HELP ASAP !
1. How many molecules are in 643.21 grams of
Mg3(PO4)22
2. How much space (Liters) does 4.061 x 10-24
molecules of H202 take up?
3. How many H20 atoms are in 479.3 grams of
H20 gas?
4. How many grams does 80.34 L of Ca(NO3)2
weigh?
5. How many Liters of space does 893.7 grams
of CO2 take up?
6. How many grams are in 5139 x10425
molecules of Al(OH)3
Answer:
1.
643.21g 1 mol 6.022^23
262.87 g 1 mol
= 1.4735E24 [Mg3(PO4)2]
2.
4.061x10^24 1mol 22.4 (L)
6.022^23 1mol
= 151 liters H2O2
3.
479.3g 1 mol 6.022^23
18.02g 1mol
= 1.60E25 H20 atoms
4.
80.34L 1mol 164.1
22.4L 1mol
588.6g Ca(NO3)2
5.
893.7g 1mol 22.4
44.01g 1mol
= 427 L CO2 or 427.4
6.
5.39 x 10^25 1mol 78.01
6.022^23 1mol
= 6980g Al(OH)3
hope this helps!! :)
Identify the reaction type shown and describe the clues that were used to identify it.
NH4NO3 → N2O + 2H2O
Answer:
This chemical equation represents a decomposition reaction. This identification is based on the fact that the single reactant chemical compound breaks down into two different chemical substances that are different from the initial chemical substance.
Explanation:
it was the sample response lol
A reactant is broken down into two or more products in the decomposition reaction. The given reaction is a decomposition reaction.
Decomposition reaction:
In this type of chemical reaction, a reactant is broken down into two or more products.
For example- Ammonium nitrate is broken down into nitrous oxide and water molecules.
[tex]\bold {NH_4NO_3 \rightarrow N_2O + 2H_2O}[/tex]
Therefore, the given reaction is a decomposition reaction.
To know more about Decomposition reaction:
https://brainly.com/question/24936069
Complete the following equations (note that the equations are not balanced). Use the activity series if necessary. Li >>Ba > Sr> Ca > Na > Mg > AI > Mn> Zn > Cr> Fe > Cd > Co > Ni > Sn > Pb>H> Sb> Bi > Cu > Ag > Pd > Hg > Pt > Au Na+Cl2 → ?
- NaCl
- NaCl2
- Na2Cl
Answer:
its C
Explanation:
Answer: NaCl
Explanation:
Na+ Cl2 ----> NaCl
What is the percent composition of sodium in Na3PO4? Express your answer to one decimal place. No units required.
Answer:
42.07%
Explanation:
Molar mass of Na3PO4 = 23×3 + 31 +16×4
= 69+ 31+64= 164 g/mol
Mass of Na in this compound is 69
Percentage of sodium in sodium phosphate = 69/ 164×100
Percentage of Na = 42.07%
What is true about the structure or function of the plasma membrane?
A:It is made entirely of integral proteins.
B:Hydrophilic molecules attract the water the cell requires.
C:The processes of endocytosis and exocytosis occur here.
D:The double layer prevents anything from entering the cell
Answer: hi theree, the answer is c. the processes of endocytosis and exocytosis occur here
hope this helps, have a good day :)
Explanation:
Answer:
C. The processes of endocytosis and exocytosis occur here
Explanation:
I just took the k12 test
A 10-gram sample of water will lose the greatest amount of heat when its temperature is changed from 50°C to
1
10°C
2
20°C
3
30°C
4
40°C
Submit Answer
Hide Toolbar
Zoom: Standard
Na
Answer:
10°C
Explanation:
Here the problem deals with the relationship between the amount of heat lost and the temperature change of a body.
From the relationship below:
H = m C Δt
H is the quantity of heat
m is the mass
C is the specific heat
Δt is the change in heat
We can see that the quantity of heat is directly proportional to the Δt, so as more heat changes occur, so also is the value of Δt .
Explain why photosynthesis and cellular respiration are the “real circle of life”
Explanation:Photosynthesis is important because the earth and all of the creatures in the sea and land need the plants to be able to feed themselves with the help of the sun and with cellular respiration, those plants are able to take in the carbon dioxide that we give and make into oxygen with we need. there fore without them we would not be able to exist.
Calculate the molar mass of Li2SO4.
Answer:
109.94 g/mol
Explanation:
Li is 6.94 and there's 2 of those = 13.88
1 S = 32.06
4 O = 63.996
Add all of those together to get 109.936 round to 109.94