Answer:
Ice cubes with salt melt faster. When you add salt, it dissolves in the water of the ice cube. The freezing temperature of salt water is 32 degrees Fahrenheit lower than that of fresh water.
1. an ancient study or art which attempted to combine science and philosophy to solve worldly problems alchemy 2. a homogeneous mixture of elements with metals to form metallic solids alloy 3. the simplest unit of an element that still retains the properties of that element compound 4. two or more elements joined together such that the elements have lost their individual identity element 5. a primary substance that cannot be divided into separate substances metal 6. the group of elements that are good conductors of electricity and heat atom 7. the group of elements that are poor conductors of electricity and heat
Answer:
1. Alchemy
2.Alloy
3.Atom
4.Compound
5. Element
6. Metal
7. Non metal
Explanation:
1. An ancient study or art which attempted to combine science and philosophy to solve worldly problems is alchemy
2. A homogeneous mixture of elements with metals to form metallic solids is an alloy
3. The simplest unit of an element that still retains the properties of that element compound is an atom.
4. Two or more elements joined together such that the elements have lost their individual identity element is called a compound
5. A primary substance that cannot be divided into separate substance is an element
6. The group of elements that are good conductors of electricity and heat is called a metal
7. The group of elements that are poor conductors of electricity and heat are called non metals.
PLEASE HELP!!!!! I'LL YOU BRAINIEST!!!!
Answer:
I believe 11 is B 12 is C 13 is B and 14 is C
PLEASE HELP!!! Which action will increase the gravitational force between two objects?
Sarah used 2.5 cups of cheese in a dish that serves 10 people. Arun used 1.6 cups of cheese in a dish that serves 8 people. How much more cheese is in one serving of Sarah's dish? *
Answer:
0.05
Explanation:
We find the rate of the chess
Sarah is 2.5/10
Arun is 1.6/8
We will get
0.25 for Sarah
0.20 for Arun
We subtract the two
0.25 - 0.20, we then get 0.05
Sarah has 0.05 more cheese in one serving than Arun
How many oxygen atoms are in 15.0 grams of Magnesium phosphate?
Answer:
8 atoms of oxygen.
Explanation:
Given parameter:
Mass of magnesium phosphate = 15g
Unknown:
Number of oxygen atoms = ?
Solution:
The formula of the compound is;
Mg₃(PO₄)₂;
Number of atoms oxygen = 2(4) = 8 atoms of oxygen.
Where is the majority of Helium in the United States obtained from?
what is soul of nature?
Answer:
well I dont know much about it but....
I think the soul if nature is kind if like a goddess which provides us the reason to live and the reason to die.
I guess thats it :/
Answer:
The human soul is naturally and essentially immortal; it is uncreated and eternal. The soul passes from one body to another through a series of many incarnations. After paying off its sin (karmic debt), the soul is liberated from somatic existence and lives in a totally blissful state.
Explanation:
hope it helps you
8. What is one sign that the water in your house is "hard?"
Answer:
More than soap sc um, hard-to-remove scale or film is often due to hard water. Also, take a good look at your faucets or fixtures.
Explanation:
hope this helps :D
1.5 mol of the complex substance carbon dioxide (CO2) is just a few oxygen atoms:
Answer:
9.03 x 10²³atoms
Explanation:
Given parameters:
Number of moles of CO₂ = 1.5mol
Unknown:
Number of atoms = ?
Solution:
In a mole of a substance, we have the Avogadro's number of particles which is 6.02 x 10²³atoms.
Using this number, we can determine the amount of atoms in any substance.
If;
1 mole of CO₂ contains 6.02 x 10²³ atoms;
1.5mole of CO₂ will contain 1.5 x 6.02 x 10²³ atoms
= 9.03 x 10²³atoms
When baking, the rods in an oven heat up and turn red. This is an example of
A. an object emitting radiation as its temperature is above 0°C.
B. an object emitting conduction as its temperature is above 0°C.
C. an object emitting radiation as its thermal boundary layer is above 0°C.
D. an object emitting conduction as its thermal boundary layer is above 0°C.
a
b
A
B
с
D
d
Answer:
The most correct option is A
Explanation:
The correct option is A because all objects emit thermal radiation when there temperature is higher than absolute zero - this is based on the Stefan-Boltzmann law. Hence, when the rods in an oven heat up above absolute zero, they begin to start emitting radiation. It should noted at this point that objects do not "emit" conduction and thus all options that involved "emitting conduction" are subsequently wrong.
What occurred during Rutherford’s experiment that led to his discovery of the nucleus?
Answer:
Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
Explanation:
In an
The mass of a small stone was 27 g.
. The reading of the level of water in the graduated cylinder was 10 cm before the
stone was placed into the overflow can.
The reading of the level of water was 19 cm after the stone was placed into the
overflow can
(a) Calculate the volume of the stone.
(b) Calculate the density of the stone.
Answer:
d = 3 g/cm³
Explanation:
Given data:
Mass of stone = 27 g
Volume of water = 10 cm³
Volume of water+ stone = 19 cm³
Volume of stone = ?
Density of stone = ?
Solution:
Volume of stone = total volume - volume of water
Volume of stone = 19 cm³ - 10 cm³
Volume of stone = 9 cm³
Density of stone:
d = m/v
d = 27 g/ 9 cm³
d = 3 g/cm³
Imagine that a cold snap hits Florida in February. Would it be cooler along the coast or further inland? Plz plz plz anwswr quick
Along the coast, its always colder near water
what is the name for Sn(NO3)4
Answer:
Tin (IV) Nitrate
General Formulas and Concepts:
Chem
Reading a Periodic TableIdentifying Polyatomic IonsWriting chemical compoundsDetermining chargesExplanation:
Sn has 2 general forms in charges: Sn²⁺ and Sn⁴⁺ as it is a Post-Transition metal.
Nitrate, NO₃⁻, has a 1 minus charge.
To balance out these charges from the given compound, we know that there are going to be 4 nitrates to balance out a charge. +4 and -4 equals 0, so the charge of Sn would be +4.
Therefore, our compound name would be Metal (Oxidation Number) polyatomic ion:
Tin (IV) Nitrate
The following equation is balanced according to the Law of Conservation of Mass:
2 NO + O2 → 2 NO2
True
False
A chemist added hydrochloric acid to a sample of baking soda in a beaker. Immediately, the mixture of the two chemicals began to fizz and bubble. Which of the following observations about the fizzing mixture provides evidence of a chemical
reaction?
A. The temperature of the beaker did not change.
B. A substance escaped from the beaker in the form of a gas.
C. Some of the baking soda remained in the bottom of the beaker.
D. Most of the baking soda appeared to dissolve in the acid.
Answer: B
Explanation:
The observations about the fizzing mixture provide evidence of a chemical reaction is A substance escaped from the beaker in the form of a gas. The correct option is B.
What is a chemical reaction?A chemical reaction is a process of forming a compound from two substances. The substance that reacts to create a compound is called a reactant, and the compound that is formed after the reaction is called a product.
In a beaker, a chemist mixed hydrochloric acid with a sample of baking soda. The two chemicals together instantly started to bubble and fizz. Fizz is the bubbles that are made in the reaction, they are realized in the environment. Thus, they have escaped from the beaker.
Thus, the correct option is B. A substance escaped from the beaker in the form of a gas.
To learn more about a chemical reactions, refer to the link:
https://brainly.com/question/22817140
#SPJ6
Which of the following statements is true about cells?
A. All cells look the same.
B. All cells perform the same function.
O C. All cells perform specialized functions.
O D. All cells are prokaryotic.
Answer:
Explanation: i think it is C if i'am wrong i'am sorry
What would be the charge on an ion whose neutral atom has an electron configuration of 2.8.7?
A. +1
B. 0
C. +7
D. -1
Answer:
A
Explanation:
What is this please help
Answer:
I think the answer is A. I am only 50% sure I am correct, but hope it helps!
Explanation:
WHO EVER ANSWERS THESE TWO QUESTIONS AS SIMPLE AS THEY CAN GETS 100 POINTS AND BRAINLY. DONT GO ON GOOGLE I ALREADY CHECKED JUST ANSWER IN YOUR OWN WORDS.
How is the atomic mass calculated for elements on the periodic table
How are orbit and electron cloud models of the atom different.
Answer:
The electron cloud keeps the surronds the atom like abubble and the orbit is what the electrons go around
Explanation:
Which family does sodium belong to?
Answer:
sodium is a member of the alkali metal family
Explanation:
What is the composition of ordinary glass
How do sediments become
sedimentary rock?
Answer:
Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.
In this experiment, what is the independent variable?
A.) The number of worms
B.) The type of worms
Answer:
i think it would be B.
Explanation:
Use coefficients to increase the atoms on each side. Check to make sure you have the same number of each type of atom on each side. Count the atoms on each side. Identify the atoms on each side.
Answer:
Balancing an equation
Explanation:
These steps describes the processes which are involved in balancing a chemical equation.
In balancing the a chemical equation, the law of conservation of mass is strictly adhered to. It suggests that in a chemical reaction, atoms are neither created nor destroyed, but they combine with one another.
Therefore, the number atoms at start and end of a reaction must be the same. You can use coefficients to increase the atoms on each side. Also, check to makes sure the number of atoms on both sides are the same. Count the atoms on each side of the expression.Answer:
balancing
Explanation:
SOMEONE PLEASE ANSWER THIS IM TIMED ON MY TEST
When petrol is burned inside a car engine it reacts with oxygen from the air. the products are carbon dioxide and water. carbon dioxide is thought to contribute to climate change so some cars now do not use petrol as the fuel. they use hydrogen instead, when hydrogen is burned in oxygen no carbon dioxide is produced. just water.
write a word equation for both reactions;
use " - - >" for the arrow in your equations.
PLS ANSWER ILL MARK BRAINLIST PLEASE
it provides carbon dioxide and rhen it goes through the car and gives the gas oxygen
what is the frequency of green light that has wavelength of 5.5x10⁷m?
Answer:
5.5Hz
Explanation:
Given parameters:
Wavelength of green light = 5.5 x 10⁷m
Unknown:
Frequency of the wave = ?
Solution;
Green light is a part of the electromagnetic spectrum. The speed of all these rays in free space is 3 x 10⁸m/s
So;
V = fλ
V is the speed
f is the frequency
λ is the wavelength;
So;
F = [tex]\frac{V}{wavelength}[/tex]
Insert the parameters and solve;
F = [tex]\frac{3 x 10^{8} }{5.5 x 10^{7} }[/tex] = 5.5Hz
A student is given a sample of an unknown liquid to test in the laboratory. The student thinks that the liquid is water. Which of the following properties of the sample is most helpful to determine if the liquid is water?
Answer:
This question is incomplete, the options are:
(A) color of the liquid
(B) mass of the liquid
(C) the volume of the liquid
(D) the boiling point of the liquid
The answer is D
Explanation:
Substances at different states usually possess certain properties that distinguishes them. For example, in this case involving a student who was given a sample of an unknown liquid to test in the laboratory, he thinks that the unknown liquid is water. Specific properties of the unknown liquid can be used to identify whether it is water or not.
One property that can be used to ascertain whether or not it is water is the boiling point of the liquid. This is because specific liquids have specific boiling point. So if the unknown liquid has a boiling point of 100°C, then it can be ascertained to be water.
can Someone help me with this
Answer:
1. Mg²⁺ 2. Cl⁻ 3. PO₄³⁻
Explanation:
Answer:
1. Mg²⁺
2. Cl⁻
3. PO₄³⁻
Explanation:
Feel free to give brainliest.
Have a great day!
a/n_________shows the number of valence electrons in an
(n)
tom in pictorial fashion.
A electron dot diagram
B periodic table C Graph
Answer:
Periodic table
Explanation: