Answer:
I think its evaporate
Explanation:
because when the heat absorbed the chemicals evaporate
The most penetrating form of radiation is __ radiation.
a. alpha
b. beta
c. positron
d. gamma
Answer: gamma. it is extremely deadly to living tissue
Explanation:
How can global warming and climate change be addressed to prevent these extreme conditions.
Plzzzzzzzz helppppppop
Answer:
you can ride a bus, ride a bike, or walk to prevent greenhouse gasses from entering the atmosphere causing global warming and climate change
Explanation:
Answer:
One way that can be very helpful is finding a way to capture carbon and bad fumes from the atmosphere which Elon Musk is offering 100 million dollars to whoever can find a way to do it !
Explanation:
Is sodium sulfide a ionic or covalent
Answer:
I would say iconic
Explanation:
please correct me if i am wrong
Sodium sulfide compound is an ionic compound. There are 2 Na atoms per 1 Sulfide atom.
Ions with opposing charges are created in ionic compounds when metal atoms transfer electrons to nonmetal atoms. Sodium gives one electron to sulphur in the case of sodium sulphide, resulting in the formation of positively charged sodium ions (Na+) and negatively charged sulphide ions (S2-). The complex is held together in a lattice structure by the electrostatic attraction between these ion pairs with opposing charges. Sodium sulfide's high melting and boiling temperatures, as well as its capacity to conduct electricity when melted or dissolved in water, are indications of its ionic nature.
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What is the correct order for the seasons of winter, spring, summer, and fall in the Northern
Hemisphere?
Answer:
Therefore, for temperate areas in the northern hemisphere, spring begins on 1 March, summer on 1 June, autumn on 1 September, and winter on 1 December. For the southern hemisphere temperate zone, spring begins on 1 September, summer on 1 December, autumn on 1 March, and winter on 1 June.
Explanation:
The correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
What is season?A season is a subdivision of the calendar year based on variations in the local climate, ecology, and amount of daylight hours. The axial parallel of Earth's inclinator orbit of the Sun causes seasons on Earth.
Seasons are distinguished by differences in the amount of sunlight reaching Earth's surface in temperate as well as polar areas. These fluctuations may lead certain animals to migrate or go into hibernation while others may cause vegetation to fall dormant. The correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
Therefore, the correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
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Which process uses the least amount of material to create electricity, coal or uranium, coal or nuclear power plant?
Answer:
nuclear power plant
Explanation:
Generation of electricity often involves the use of some kind of material or energy that is consumed as electricity is generated. There are various ways of generating electricity such as;
By burning coal
Use of a radioactive element as nuclear fuel
From wind energy
From water
From the sun, etc
Each process involves the intake of material or energy. The process that goes on in a nuclear power plant requires a radioactive fuel of which uranium is an example.
A nuclear plant uses the least amount of material (such as only 1g of uranium fuel) in electricity generation compared to the tons of coal burnt in order to generate electricity.
Brain storm 7-10 ways that the water molecules have been either put to good use or violated on planet Earth
Answer:
Find the list below.
Explanation:
Good Use
1. Manufacture of substances: Virtually all manufactured substances incorporate water during their production.
2. Provision of electricity: Water in dams have been channeled to provide thermal energy.
3. Provision of transportation: Ships, boats, and canoes provide a means of transporting humans and goods to other places using water as a medium.
4. Provision of recreation: Swimming in pools are recreational activities.
5. Cleaning surfaces and the environment: Dust and other debris are removed from our homes and environments with the help of water.
6. Provision of food: The fishes obtained from water bodies serve as a food source.
Bad Use
1. Refuse dumping ground: Most industries and homes channel waste products into water bodies and this can be dangerous to aquatic lives.
2. Channels for oil spillage: Oil spillage is another environmental hazard caused by humans on water bodies.
A compound that releases hydroxide ions in solution would most likely have which chemical property? 1.It would react with lipids to form soap. 2.It would react with metals to form a salt and water. 3.It would react with metals to form hydrogen gas. 4.It would react with carbonates to form carbon dioxide.
Answer:
1
Explanation: bases do not react with metals or carbonates
Answer:
A
Explanation:
I did the test and that's the correct answer
A student need to predict the mass of a block of aluminum. The block is 4.23 cm on all sides and the density of aluminum is 2.7 g/cm3. What will the mass of the block be?
A compound has the empirical formula C2H40, and its formula mass is 88
g. What is the subscript for oxygen in the molecular formula? *
Answer:
2
Explanation:
The molecular formula can be derived from the empirical formula of a compound and the molecular mass as follows:
(C2H4O)n = 88g/mol
Where;
C = 12, H = 1, O = 16
{12(2) + 1(4) + 16}n = 88g/mol
{24 + 4 + 16}n = 88
(44)n = 88
44n = 88
Divide both sides by 44
n = 88/44
n = 2
The molecular formula is: (C2H4O)n
= (C2H4O)2
= C4H8O2
According to the question asked, oxygen has a subscript of 2 in the molecular formula.
If I have 7.7 moles of gas at a pressure of 9.12 kPa and a temperature of 56 °C,
what is the volume of the container that the gas is in?
Answer:
C
Explanation:
n= 7.7mol
P= 9120pa
T = 329.15K
PV=nRT
V= nRT/P
V= (7.7×8.314×329.15)/9120
V= 2.308meter cubic
V= 2308L
volume of 5.2 X 10^26 molecules of CH4
Answer:
19348.84 L
Explanation:
At STP, we know that;
6.02 × 10^(23) molecules = 22.4 L
Therefore, 5.2 × 10^(26) molecules = 5.2 × 10^(26) × 22.4/(6.02 × 10^(23)) = 19348.84 L
Thus, volume of CH4 with 5.2 X 10^26 molecules is 19348.84 L
lithium sulphate is used in some medicines and its presence in a medicine can be shown by two a combination of two tests a)explain how a flame test could help in this context
b) Describe how you would test a solution of the medicine for the presence of sulphate ions.
C) write a balanced chemical equation, including state symbols, for the reaction occurring in B)
Answer:
A flame test could help by seeing what things it could catch on fire from or the things that could happen with acids etc. I would test the medicine by asking someone who has had it in their life, asking doctors or I would maybe use it myself maybe. (I don’t know about c, sooo sorry)
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How is a chemical equation different from a chemical formula?
Answer:
Explanation:
A chemical formula is the combination of atomic symbols that designate a particular chemical compound, or a substance with two or more different elements. The formula shows which type and how many of each element makes up that specific compound
The .......................................................... Is related to its tendency to give away electrons and form positive ions
Answer:
electropositivity or metallic character.
The ability of an atom to give away electrons and form positive ions i.e cations is known as electropositivity or metallic character.
Ecosystems are constantly _______________ (changing, remain the same) in the ________________ (same, different) ways over time.
Answer:
changing
different
Explanation:
An airplane travels 200 km/h in 4 hours going to Zambales. What will be the distance and displacement?
Answer:
See explanation
Explanation:
Recall that;
Speed = Distance/time
Distance = Speed * time
Speed = 200 km/h
Time = 4 hours
Distance = 200 km/h * 4 hours = 800 kilometres
Displacement has to do with distance covered in a specified direction, in this case, the direction is towards Zambales.
Hence, the displacement is 800 kilometres towards Zambales.
In molecular oxygen (O=O) which atom is partially positive?
the oxygen atom
Explanation:
Water is a molecular compound consisting of polar molecules that have a bent shape. The oxygen atom acquires a partial negative charge while the hydrogen atom acquires a partial positive charge.
Answer:
Carbon
Explanation:
oxygen is more electronegative than carbon, the electrons will spend more time around the oxygen atom giving it a partially negative charge while the carbon will become partially positive. Some atoms retain lone (unbonded) pairs of electrons when they are part of a covalent complex.
What happens to the amount of energy as it flows up the food chain
Answer:
It decreases because animals only get 10% of the energy they eat.
Explanation:
What can air pollutants do?
Answer:
Air pollution can also cause headaches, dizziness, and nausea. ... Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs.
Explanation:
A ring of pure gold has a mass of 17.3 grams. How many atoms of gold are in the ring?
Answer:
5.29936 x 10^23 atoms
Explanation:
To do this, we need to find the number of moles in the ring so that we can then multiply that by Avogadro's number (6.022×10^23).
equation for finding moles: [tex]n = \frac{mass}{M_{r} }[/tex]
substitute in the known values: [tex]n = \frac{17.3}{197 }[/tex]
divide to find the value of n: 0.088 mol
Multiply by Avogadro's constant: 0.088 x 6.022 x 10^23
= 5.29936 x 10^23 atoms in the ring.
hope this helps!
According to Avogadro's number, there are 5.289×10²² atoms of gold in 17.3 grams of ring.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
In the given problem, number of atoms of gold is found out as, number of atoms=17.3/196.966×6.022×10²³=5.289×10²² atoms.
Thus, there are 5.289×10²² atoms of gold in the ring.
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I need help with question 5 whoever helps could get Brainlest or extra credit
A(n)_______ contains two or more substances that are not chemically combined. (pic down below)
A solution has a concentration of 40 g.L-1
. We take 20 mL of this solution and add water. The
final volume is 40 mL. What's the new concentration? No calculations but you need to
justify
Answer: The new concentration is 20 g/L
Explanation:
According to the dilution law,
[tex]C_1V_1=C_2V_2[/tex]
where,
[tex]C_1[/tex] = concentration of stock solution = 40 g/L
[tex]V_1[/tex] = volume of stock solution = 20 ml = 0.02 L
[tex]C_2[/tex] = concentration of diluted solution= ?
[tex]V_2[/tex] = volume of diluted solution= 40 ml = 0.04 L
[tex]40g/L\times 0.02L=C_2\times 0.04L[/tex]
[tex]C_2=20g/L[/tex]
Thus new concentration is 20 g/L
Two balloons are given an electrostatic charge by rubbing them with a wool cloth. Which observation provides evidence of the force that the balloons exert on each other over a distance because of their charge?
Answer:
C. Moving Balloon 1 can make Balloon 2 move without the balloons touching.
Explanation:
When two balloons are rubbed with a wool cloth, they get electrostatic charge and both become negatively charged.
If both balloons will be place close together, balloon 1 will push the balloon 2 far from itself without touching it as they both are negatively charged and things with same charges repel each other.
Hence, the correct answer is "C. Moving Balloon 1 can make Balloon 2 move without the balloons touching."
In naming the compound PCl5, the prefix used with the second element is ____________________.
Answer:
[tex]\boxed {\boxed {\sf Hepta}}[/tex]
Explanation:
We are given the formula:
[tex]PCl_5[/tex]
This is a molecular formula, because it contains nonmetals.
1. Name the first element
The first element is phosphorous (P). Since this is the first element and there is only one, we don't need a prefix.
Phosphorous2. Second element
The second element is chlorine (Cl). It has a subscript of 5, so we must add the prefix of hepta-.
Phosphorous heptachlorineAdd the ending of -ide.
Phosphorous heptachlorideThe prefix used for the second element is hepta. The compound name is phosphorous heptachloride.
Which is true of synthesis and decomposition reactions
Complete question is;
What is true of synthesis and decomposition reactions?
A) Synthesis reactions require more energy than decomposition reactions.
B) Synthesis reactions produce more products than decomposition reactions.
C) Synthesis reactions are the opposite of decomposition reactions.
D) Synthesis reactions have fewer reactants than decomposition reactions.
Answer:
C) Synthesis reactions are the opposite of decomposition reactions.
Explanation:
Correct answer is option C. This is because, Synthesis reactions are defined as those whereby substances are combined together to form larger molecules/compounds. Whereas, decomposition reactions are the opposite due to the fact that they involve the breakdown of two or more substances.
When you name a binary compound, you have to add____ to the ending of the second element in the compound.
A) -ate
B) -ide
Answer:
B - ide
Explanation:
Do you think thermal expansion affects all states of matter or just the solid? Explain your thinking.
Answer:
All three states of matter (solid, liquid and gas) expand when heated. The atoms themselves do not expand, but the volume they take up does.
When a solid is heated, its atoms vibrate faster about their fixed points. The relative increase in the size of solids when heated is therefore small. Metal railway tracks have small gaps so that when the sun heats them, the tracks expand into these gaps and don’t buckle.
Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids. This is the principle behind liquid-in-glass thermometers. An increase in temperature results in the expansion of the liquid which means it rises up the glass.
Molecules within gases are further apart and weakly attracted to each other. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy) which means that the volume of a gas increases more than the volume of a solid or liquid.
However, gases that are contained in a fixed volume cannot expand - and so increases in temperature result in increases in pressure.:
The diagram indicates that the tilt of Earth's axis and Earth's revolution around the Sun cause
Earth to experience ?
Answer:
G.day and night
sorry if it is wrong!