1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ankoles [38]
3 years ago
15

Can someone help me with this 3 questions I’ll mark brainliest spam answers will be reported

Chemistry
2 answers:
Tju [1.3M]3 years ago
4 0

Answer:

1. stomach

2. veins

3.both are functions

Explanation:

1. <u>The cardiovascular system consists of the </u><u>heart</u><u>, and a closed system of vessels called arteries, </u><u>veins</u>, and capillaries. (Stomach is not included)

2.The inferior vena cava is the largest vein in the body and <u>carries deoxygenated blood from the lower half of the body into the heart</u>

<u>3. </u><u>Blood transports oxygen and nutrients to the lungs and tissues, and  brings waste</u><u> products to the kidneys and liver, which filter and clean the blood.</u>

<u />

<u>Hope this helps!</u>

anygoal [31]3 years ago
3 0
1. A
2. A
3. C
Your welcome
You might be interested in
A compound was found to be soluble in water. It was also found that addition of acid to an aqueous solution of this compound res
gogolik [260]

Answer:

c. Cr

Explanation:

Cr^3+(aq) + CO_3^2-(aq) ------------> Cr_2CO_3(s)

The compound is containing CO_3^2- ion.

If acid reacts with it, CO_2 evolves.

H^+ + CO_3^2- ----------> H_2O + CO_2

therefore,  Cr would form a precipitate when added to an aqueous solution of this compound. Cr2CO3 is the precipitate.

3 0
3 years ago
How do the circulatory system and the respiratory system function together in the body?
kykrilka [37]

The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart

6 0
2 years ago
What is the relationship between valence electrons and the number of bonds that can be formed?
nadya68 [22]
 <span>Like the previous post states, the number of valence electrons (typically the group number for nonmetals)relates directly to the number of covalent bonds available. Additionally, when you exceed this number you create a cation and when you are less the number of potential bonds, you have created a anion.
</span>
6 0
3 years ago
Iron-59 is a beta emitter with a half-life of 44.5 days. If a sample initially contains 180 mg of iron-59, how much iron-59 is l
Jobisdone [24]

Answer:

2.79 mg iron-59 is left in the sample after 267 days.

Explanation:

Given that:

Half life = 44.5 days

t_{1/2}=\frac {ln\ 2}{k}

Where, k is rate constant

So,  

k=\frac {ln\ 2}{t_{1/2}}

k=\frac {ln\ 2}{44.5}\ days^{-1}

The rate constant, k = 0.0156 days⁻¹

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration  = 180 mg

Time = 267 days

So,  

[A_t]=180\ mg\times e^{-0.0156\times 267}

[A_t]=180\times e^{-0.0156\times 267}\ mg

[A_t]=2.79\ mg

<u>2.79 mg iron-59 is left in the sample after 267 days.</u>

5 0
3 years ago
Which equation best represents the process of photosynthesis ? A. 6CO2+12H2O-&gt; light+C6H12O6+6O2+6H2O B.6CO2+12H2O+light-&gt;
Aleksandr [31]
The correct answer is B. The equation that represents the process of photosynthesis is: 6CO2+12H2O+light->C6H12O6+6O2+6H2O. <span>Photosynthesis is the process in plants to make their food. This involves the use carbon dioxide to react with water and make sugar or glucose as the main product and oxygen as a by-product.</span>

6 0
3 years ago
Read 2 more answers
Other questions:
  • natural rubidium has the average mass of 85.4678 and is composed of isotopes 85 Rb(mass = 84.9117) and 87 Rb. The ratio of atoms
    15·1 answer
  • Which substance is a homogeneous mixture?
    14·1 answer
  • What is the limiting reactant for the following balanced equation when 9 moles of AlF3 are mixed with 12 miles of O2?
    5·1 answer
  • 3) A solution contains 61.3 moles of KC103 in 0.25 L of solution. What is the
    7·1 answer
  • Which of the answer choices below represents the most fair way to collect the data?
    8·1 answer
  • Méthode pour sépare l'eau et vermiculite !
    9·1 answer
  • How many milliliters (mL) are in 0.847 liters (L)
    8·1 answer
  • I have no idea on how to do this here is the question (For the following pairs of atoms, show how they transfer valence electron
    12·1 answer
  • PLEASE HELP ASAP!!!!!
    9·1 answer
  • Is there a way of knowing the charges of transitional elements other than to memorize them?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!