Answer:
it drops off of carbon dioxide... but i believe when the blood returns to the heart it " travels" through the pulmonary veins...
use your brain :) brainliest pweasee?
A supply of copper pipes is stored outdoors. Over the course of many years, the copper reacts with oxygen and turns green. What clue indicates a chemical reaction took place?
Answer: the oxidation of the copper (it turning green)
Explanation:
what type of reaction is
CuO + H2SO4 ➡️ CuSO4 + H2O
Question 2 of 11
Which of these are part of a scientific way of gathering information?
A. Fairy tales
B. Religious beliefs
C. Investigations
D. Opinions
SUBMIT
Answer:
C
Explanation:
the rest arent scientific
Answer:
C. Investigations
Explanation:
Test approved
Imagine our class has discovered a new element and named it Berkmarium. Berkmarium is known to have 3 naturally occurring isotopes. In nature, 70% of the element is Berkmarium-95, 28% is Berkmarium-97, and 2% is Berkmarium-94. Which isotope will the average atomic mass of Berkmarum be closest to, and why? Support your answer with a calculation.
Answer:
Detail is given below.
Explanation:
Given data;
Abundance of Berkmarium-95 = 70%
Abundance of Berkmarium-97 = 28%
Abundance of Berkmarium-94 = 2%
Average atomic mass closer to which isotope = ?
Solution:
1st of all we will calculate the average atomic mass of Berkmarium.
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (70×95)+(28×97)+(2×94) /100
Average atomic mass = 6650 + 2716+ 188 / 100
Average atomic mass= 9554 / 100
Average atomic mass = 95.54 amu
The average atomic mass is closer to the isotope Berkmarium-95 because it is present in abundance as compared to the other two isotope. So this isotope constitute most of the part of Berkmarium.
3. A substance which is made up of two are more different
elements chemically combined is known as
A. an atom
B. a substance
C. a compound
D. a molecule
Answer:
Im pretty sure it c
Explanation:
When gold is hammered it "squishes". Iron Pyrite is
known as "Fool's Gold". It is not..........
like gold,
but shatter into many pieces when struck by a
hammer, Iron Pyrite is..........
Explanation:
When gold is hammered it "squishes". Iron Pyrite is
known as "Fool's Gold". It is not..........
like gold,
but shatter into many pieces when struck by a
hammer, Iron Pyrite is..........
is this correct? say something if it's wrong lol
Answer:
seFG9zuh98gufhIUAFIyhA*UGH8gguuguuuuuuuu
Explanation:
Answer:
Yes that look about right to me :)
Hydrogen can be found in many things. It cannot be broken down to create something else. An example of something like hydrogen is oxygen. We call things like hydrogen or oxygen _ .
Answer:
matter im pretty sure sorry if its wrong
Explanation:
based on the property of conserving matter, matter can not be created or destroyed
6.82
A 2.10-mole sample of crystalline acetic acid, ini-
tially at 17.0°C, is allowed to melt at 17.0°C and is
then heated to 118.1°C (its normal boiling point) at
1.00 atm. The sample is allowed to vaporize at.
118.1°C and is then rapidly quenched to 17.0°C, so
that it recrystallizes. Calculate AH° for the total pro-
cess as described.
Answer:
0 kj
Explanation:
melting/initial temperature = 17.0°c
boiling point = 118.1°C
pressure = 1.00 atm
2.10 mole sample of crystalline
attached below is the detailed solution required
Two reasons photosynthesis is important
Answer:
Gives us oxygen to live, and if produces products such as, rubber, timber, herbs, and medicines.
what can you infer about an ion that has a negative charge?
I NEED HELP FAST FOR MY TEST!!!
Answer:
It has more electrons than protons. It is an anion.
5. The prefox Semi-Deans Capardy SC Based on your knowledge of the properties of elements, which kind of elements is most likely to make semiconductors?
what is an atoms nucleus made of
Answer:
The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks. The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus.
Use the following chemical equation to answer the question:
2 N2 + 3 H2 ⟶ 2 NH3
How many atoms of N (nitrogen) are present in the products?
1. 2
2. 3
3. 6
4. 9
2 atome nitrogen , 1 is correct
Calculate the density in grams per cubic centimeter of a material that has a mass of
720 milligrams and a volume of 10.0 cubic centimeters. =
Answer:
1.72 g/cm ^3
Explanation:
Single energy transformation
answer:
a change from one form of energy to another
explanation:
Soil is an important resource. The erosion of soil is a problem worldwide. Which human activity MOST directly increases soil erosion?
Group of answer choices
Answer:
Farming/agriculture
Hope this helps and have a great day :)
And please mark me brainliest if you can :)
Mark all correct answers. Which of the following statements correctly describes plasmas
ANSWER Plasamas are good conductors of electricity and are affected bt magnetic fields
All the elements in the universe heavier than Helium are/were created _______.
a.
during the Big Bang
b.
by stars
c.
by chemical reactions
d.
from Lithium
Answer:
B. by stars
Hopes this helps
Explanation:
Explain why the several different types of microscopes are all necessary.
Answer:
some zoom in farther
Explanation:
some microscopes zoom in farther than others so we can see even smaller things
Jamal is 8 miles away from his house. He rides his bike home toward home at a speed of 12 mph..
How far away from home is he after a half hour?
Answer: 2miles
Explanation:if he’s going 12 miles in one hour, in half an hour he would’ve made it 6 miles. 8-6=2
Answer: b. 2 miles
Explanation:
When the first periodic table of the elements was published, the elements were arranged by atomic mass. Although
several elements seemed out of order, later discoveries showed the order to be correct.
Which event most likely helped the development of the periodic table?
O Scientists changed the atomic masses to better fit the pattern.
O Scientists refused to consider other ways to organize the elements.
O New technology was developed that modified the masses.
O New information changed the understanding of the atom's structure.
ANSWER ASAP
what does MA 2 means?
Answer:
Master-at-Arms Petty Officer 2nd Class. MA2. Machine Accountant Second Class (Naval Rating) Copyright 1988-2018 AcronymFinder.com, All rights reserved.
Explanation:
What is the relationship between the number of each atom used to form compound and oxidation number?
Answer:Explanation:
In compounds, all other atoms are assigned an oxidation number so that the sum of the oxidation numbers on all the atoms in the species equals the charge on the species.
Question 3 (3 points)
(03.04LO)
Match the formula to the correct name. (3 points)
Column A
Column B
1.
Cas
a. Calcium sulfide
2.
CaSO4
b. Calcium sulfate
3.
CaSO3
C. Calcium sulfite
Answer:
Column A [tex]{}[/tex] Column B
1. CaS [tex]{}[/tex] Calcium Sulfide
2. CaSO₄ [tex]{}[/tex] Calcium sulfate
3. CaSO₃ [tex]{}[/tex] Calcium sulfite
Explanation:
1) Calcium sulfide is a compound formed between calcium, Ca, and sulfur, S, with a chemical formula of CaS. It forms cubic crystals similar to rock salt, and smells like rotten eggs
2) Calcium sulfate is a chemical compound consisting of calcium, Ca, and sulfate SO₄. It is found in nature in the hydrated form as the mineral gypsum
3)Calcium sulfite is a chemical compound formed between calcium, Ca and sulfite, SO₃ used to treat water and preserve food.
Answer:
the formula for calcium sulfite is CaSO3
the formula for calcium sulfate is CaSO4
the formula for calcium sulfide is CaS
Explanation:
Plz Help!
Make a funny sentence for flammability and compounds for Magnesium
A 40 g sample of sucrose contains 16.8 g of carbon. what is the mass
percentage of carbon in sucrose?
Answer:
Thus 100.00 g of sucrose contains 42.11 g of carbon, 6.48 g of hydrogen, and 51.41 g of oxygen; to two decimal places, the percent composition of sucrose is indeed 42.11% carbon, 6.48% hydrogen, and 51.41% oxygen.
Explanation:
Hope this helps, leave a heart ❤️
Please answer correctly..
will give the brainliest!
Urgent!!!
a) lithium
Execution:
First, a magnesia stick is dipped in hydrochloric acid and then in lithium chloride. The stick is then held in the burner flame.
Observation:
The flame turns carmine.
b) ammonium ion
Execution:
Some ammonium sulfate is placed in a small vessel. A strip of indicator paper is moistened and stuck to the inside of a watch glass case. Then a few drops of hydrochloric acid are added to the ammonium sulfate and the watch glass bowl is held over the vapors that develop.
Observation:
The indicator paper turns blue because gaseous ammonia is produced, which reacts with the water in the indicator paper to form a base.
c) sulfate ions
Execution:
The ammonium sulfate is dissolved in water and treated with barium chloride solution.
Observation:
A white, poorly soluble precipitate of barium sulfate is formed.
d) presence of water
Execution:
Anhydrous copper sulfate, which is white, is added to the substance to be tested.
Observation:
In the presence of water, the salt turns light blue.
e) carbonate ions
Execution:
A few drops of hydrochloric acid are placed on the solid calcium carbonate.
Observation:
A gas evolution can be observed, during which carbon dioxide is produced.
f) iodide ions
Execution:
A potassium iodide solution is mixed with silver nitrate solution.
Observation:
A yellow precipitate of silver iodide is formed.
For lunch you have a glass of sweetened ice tea. The glass contains crushed tea leaves, sugar, a slice of lemon, and both liquid and frozen water (ice cubes). Which of the following categories of matter best describes the contents of the glass? *
Answer:
I think solids
Explanation:
sorry if its not right
Turtles are cold blooded meaning to use the sun to keep warm Austin a hypothesis the hospital prefer swimming in warm water he places his turtle on a rock in the middle of the bathtub and measures how much time the turtle spends off the rock doing a five minute. He conducts experiment on the four conditions in the bathtub no water warm water cold water and room temperature water in this experiment which is a control group
Answer:
Explanation:
This question is a little indirect but what should be noted is that the control group of any experimental research is the group that is not subjected to any form of treatment and is the first group in which the other groups (experimental groups) are compared to.
The control group in the experiment described in the question is the group placed in the bathtub with no water