Answer:
Only protons and neutrons contribute to an atom's mass value
Explanation:
If 1.2 g of ammonium bicarbonate is treated with .75 grams of sodium chloride, 63.0075 grams sodium bicarbonate will be produced. In this reaction NaCI is limiting reagent. True or false
Answer:
True
Explanation:
Limiting reagent is the reactant that determines the progress of the reaction. It determines how much of the product is formed.
The equation for this reaction is;
NaCl (aq) + NH4HCO3 (aq) → NaHCO3 (aq) + NH4Cl (aq)
From the reaction, 1 mol of NaCl reacts with 1 mol of NH4HCO3 to produce 1 mol of NaHCO3
Converting to masses using; Mass = Number of moles * Molar mass
58.44g of NaCl reacts with 79.056g of NH4HCO3
If we were to sue the whole 1.2 g of NH4HCO3 we would require xg of NaCl
58.44 = 79.056
x = 1.2
x = 0.887g
The fact that 1.2g of NH4HCO3 requires 0.887g of NaCl (which is less than the available 0.75g) means that NaCl is the limiting reagent.
please help thank you
18. How is the kinetic energy of molecules changing when the molecules move faster?
The kinetic energy ...
a
is not changing
b
depends on the molecules.
С
is decreasing.'
d
is increasing
Scroll for more
Answer:
d
Explanation:
the more movement the more energy
heat alwais moves from ____ to _____.
Answer: left to right
Explanation:
By February of 1861, how many states seceded from the Union?
5
11
9
7
Answer:
D. 7
Explanation:
i did it
Does the following compound contain a polyatomic ion? LiC2H3O2
Yes
No
Answer:
yes
Explanation:
the polyatomic ion is acetate, C2H3O2
which one is you fav one
Answer:
the 3rd one
Explanation:
What element is added to copper to make bronze? Why is this important for making bells?
Answer:
The correct answer is - tin.
Explanation:
Tin is the element that is mixed with copper to make bronze as bronze has many unique properties such as crisp sound quality and hardness. The hardness of the bronze allows them to make a good quality sound is come by adding tin to copper restricts the free flow of electrons of the copper atoms.
The pure metals have molecules present in an orderly manner and allow the electrons to free flow. This is why bell makers use bronze as it does not allow electrons to move freely which makes it hard and makes a good sound.
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Why was Wegener’s theory of continental drift almost completely discarded?
A. It didn’t explain how continents fit together.
B. It didn’t explain how mountains formed.
C. It wasn’t supported by fossil evidence.
D. It didn’t have a mechanism for how drift occurred.
Which of the following is evidence that the continents were once part of a supercontinent called Pangaea?
A. Island Arcs
B. Deep ocean trenches
C. Glacier scrapings
D. Mid-ocean ridges
Answer:
1: The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his hypothesis was rejected by many for lack of any motive mechanism. 2: The most obvious evidence for continental drift is that the continents appear to fit together like pieces of a puzzle. But scientists were skeptical , and Wegener needed additional evidence to support his hypothesis. Glaciers covered large areas that are now parts of these continents.
Answer:
1. D
2. C
Explanation:
1. Although now accepted, the theory of continental drift was rejected for many years, with evidence in its favor considered insufficient. One problem was that a plausible driving force was missing. A second problem was that Wegener's estimate of the speed of continental motion, 250 cm/year, was implausibly high.
2.The most obvious evidence for continental drift is that the continents appear to fit together like pieces of a puzzle. But scientists were skeptical , and Wegener needed additional evidence to support his hypothesis. Glaciers covered large areas that are now parts of these continents.
Cell organizations^ pls help
Answer:
Multicellular organisms have cells that are organized in specific ways to perform specialized functions. From the most complex level to the simplest level, the five levels of organization for the sheep should be ordered as:
whole organism → organ system → organ → tissue→ cell
Explanation:
protons are one of the heavier pieces of an atom. true or false?
Answer:
true
Explanation:
PLEASE HELP ME ILL GIVE BRAINLIEST
Answer:
TRUE :)
Explanation:
blood is pumped through the pulmonary artery to the lungs, where it picks up oxygen and releases carbon dioxide.
Answer:
False
Explanation:
it takes it to tha lungs.
how many atoms are in 2.85x10^3 g of gallium
Answer:
2850 grams I hope this help
Can someone help? I don’t understand at all
Na = 2 atoms
Cl = 2atoms
F = 2 atoms
Further explanationGiven
Skeleton equation(unbalanced equation) :
NaCl+F2⇒NaF+Cl2
Required
The number of atoms
Solution
We balance the reactions to find the reaction coefficient, which is then used to calculate the number of atoms in the reactants and products
Balanced equation
2NaCl + F2 → 2NaF + Cl2
A balanced reaction will show that the number of atoms in the reactants and products is the same
Reactants :Na = 2 atoms
Cl = 2atoms
F = 2 atoms
Products :Na = 2 atoms
F = 2 atoms
Cl = 2 atoms
A car left from its initial position at 6 pm. The car arrived at its final position at 11pm. How much time did it take the car to arrive ?
Answer:
5 hours.
Explanation:
Given that,
Initial time, [tex]T_i=6\ pm[/tex]
Final time, [tex]T_f=11\ pm[/tex]
We need to find how much time did it take the car to arrive.
Time = final time-initial time
= 11 pm - 6 pm
= 5
So, it takes 5 hours by car to arrive.
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Look at the Punnett square below which shows the cross between two frogs. Green is the dominant skin color while brown is the recessive skin color. What are the phenotype probabilities?
Question 8 options:
50% green, 50% brown
25% green, 25% brown
100% green, 0% brown
75% green, 25% brown
Balance the chemical equation. Based on the equation, how many grams of bromine are produced by the complete reaction of 11 grams of potassium bromide?
Answer:
Explanation:
The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:
11.0 g KBr (1mol KBr/119.002g KBr * 1mol Br2/2mol KBr * 159.808g Br2/1mol Br2= 7.39 g Br2.)
Why did early people most likely choose to settle in Mesopotamia?
Answer:
People wanted to settle there because it had good living conditions. There was rich soil, and lots of water sources.
I hope this helps!
The answers plzzzzzzz
Answer:
ok, whats the question
Explanation:
In an exothermic reaction, the average kinetic energy of the particles of matter ib the products _____
1. decreases
2.stays the same
3. increases
Answer:
decreases
Explanation:
I'm hope it's correct
When there is an exothermic reaction so here the average kinetic energy of the particles of matter ib the products is option 1. decrease.
What is an exothermic reaction?In terms of thermochemistry, an exothermic reaction means the reaction where the total standard enthalpy should change so ΔH⚬ is negative. Also it should be release heat.
So based on this, When there is an exothermic reaction so here the average kinetic energy of the particles of matter ib the products is option 1. decrease.
Learn more about reaction here: https://brainly.com/question/18358257
What are the steps to naming an ionic compound with both a polyatomic ion and transition metal.
Answer:
Write the name of transition metal as shown on the Periodic Table. Write the name and charge for the non-metal. If you have a polyatomic ion, use the Common Ion Table to find and write the formula and charge.
Explanation:
I hope this help you! :D
Newton's first law is demonstrated in what station?
Answer:
hope this helps!
Explanation:
This law states that a still object will stay still unless a force pushes or pulls it. A moving object will stay moving unless a force pushes or pulls it. Gravity and friction are forces that constantly push and pull the "stuff" on earth. So, when we roll a ball, it slowly comes to a stop.
Please help me its balancing the equation
Answer:
1, 2, 2, 1
Explanation:
Which of the following would happen if Earth's moon were half the size that it is now? O The oceans' tidal variations would be smaller because the Moon would exert less gravitational pull on Earth's oceans. O The oceans' tidal variations would be greater because the Moon would exert less gravitational pull on Earth's oceans. O The oceans' tidal variations would be greater because the Moon would exert more gravitational pull on Earth's oceans. The oceans' tidal variations would be smaller because the Moon would exert more gravitational pull on Earth's oceans. & Previous
Answer: A. The oceans‘ tidal would be smaller because the moon would exert less gravitational pull on earths oceans.
Explanation:
i got it right :)
The objects potential energy at point Y is less its potential energy at which of the following points
Answer:
C
Explanation:
increase potential energy ( in motion)
PLS HELPPPPPPPPPPPPP
Answer:
3. Structural features
why might genetically identical twins have different phenotype
Answer:
They may have different phenotypes because of differences in their environments, such as nutrition and healthcare. Why might genetically identical twins have different phenotypes? Any genes on the same chromosome could be linked genes, whereas only genes on sex chromosomes can be sex-linked genes.
Explanation:
Due to the effects of the environment, genetically identical twins might have different phenotype.
What is phenotype?The qualities or visible characteristics of an organism are its phenotype. It depends on how the environment and the genotype, or genetic code, of the organism interact.
Although human monozygotic twins as well as other genetically identical species may share startling physical similarities, they frequently differ in key characteristics, such as complicated diseases. The effects of the environment have generally been blamed for this variance across organisms with essentially identical chromosomal DNA sequences.
Therefore, due to the effects of the environment, genetically identical twins might have different phenotype.
To know more about phenotype, here:
https://brainly.com/question/11197451
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Review the poster.
https://www.cdc.gov/handwashing/pdf/wash-your-hands-fact-sheet-508.pdf
What is the greatest advantage of using a poster to present the information in “Stop Germs! Wash Your Hands”?
A poster that features brief sentences conveys urgency and simplifies content.
The extensive detail in posters captures viewers and causes them to stop and read.
The colors and images of a poster often convey a stronger message than words.
A poster appeals to several senses at once, which makes it hard to ignore.
A. A poster that features brief sentences conveys urgency and simplifies content.
Help please!! I'll name you brainliest!!
the answers is cacih2
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How many orbitals exist for s shape
