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
Snezhnost [94]
3 years ago
8

PLEASE HELP 25 POINTS!!!!

Chemistry
1 answer:
Mariulka [41]3 years ago
7 0

Answer:

1 is c 2 is b

Explanation:

because atomic number is the number of protons in a nucleus

2..because the number of protons plus number of neutrons is equal to mass number.

You might be interested in
Are used them since made of two or more elements that have been chemically combined is a(n)
m_a_m_a [10]

Elements can be chemically combined into compounds, therefore, a compound consists of two or more elements combined, in definite proportions, by chemical means. Compounds may be formed by combining atoms of their constituent elements by ionic bonds or by covalent bonds.

hope this helped

5 0
3 years ago
A balloon has a pressure of 3.1 atm at a volume of 155 ml. if the temperature is held constant, what is the volume (ml) if the p
GarryVolchara [31]

Answer:

45.8 mL

Explanation:

If all variables are held constant, the new volume can be found using the Boyle's Law equation. The equation looks like this:

P₁V₁ = P₂V₂

In this equation, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the final pressure and volume. You can find the new volume by plugging the given values into the equation and simplifying.

P₁ = 3.1 atm                        P₂ = 10.5 atm

V₁ = 155 mL                       V₂ = ? mL

P₁V₁ = P₂V₂                                                 <----- Boyle's Law equation

(3.1 atm)(155 mL) = (10.5 atm)V₂                <----- Insert values

480.5 = (10.5 atm)V₂                                  <----- Multiply 3.1 and 155

45.8 = V₂                                                    <----- Divide both sides by 10.5

4 0
2 years ago
List the 10 foods that strengthen your immune system and what they have in them that helps you.
Temka [501]

Answer: this was on a website dont copy word  for word plz

1 – Garlic

10 Foods That Boost Your Immune System New Braunfels, TXGarlic is now a well-known immune-boosting food and is included in many over-the-counter supplements and health products.

2 – Vitamin C

Vitamin C is not a food on its own, but there are a number of beneficial foods for your immune system that include high levels of vitamin C. Everyone knows that oranges and other citrus fruits contain vitamin C, but foods like green and red bell peppers, broccoli, kale and spinach are also high in this important vitamin that supplies antioxidants to strengthen your immune system.

3 – Blueberries

All types of berries are good for you, but blueberries go a step further with a flavonoid called anthocyanin. Its antioxidant properties have the ability to boost your immune system, and a study from 2016 found that flavonoids play an important role in the immune defense system of your upper respiratory tract.

4 – Healthy Oils

Heart-healthy oils are important for optimum health, and can give your immune system a boost at the same time. Some of the most beneficial oils are olive oil, coconut oil, and fatty fish like sardines and herring.

5 – Echinacea

Drinking a tea made with the flowering herb Echinacea may help improve your immune system response. You can also get it as a tincture or in a range of different supplements.

6 – Green Tea

Green tea is a good source of antioxidants and contains the amino acid theanine, which is beneficial for fighting off illnesses. Green tea has been a staple in different Asian cultures for centuries, and is now quite popular in North America.

7 – Leafy Green Vegetables10 Foods That Boost Your Immune System Boerne, TX

Leafy green vegetables like spinach, watercress, and collard greens have a range of different health benefits that can improve your body’s ability to fight off viruses.

When possible, eat leafy greens raw in their natural state to get the most health benefit.

8 – Turmeric

Turmeric contains a healthful compound called curcumin that has been shown to have antioxidant and anti-inflammatory features, which contribute to immune function in the body. It is a rich yellow color and it is often used in different types of cooking, but is being used more and more in North America for medicinal purposes.

9 – Kefir

Kefir is a fermented drink that is sold in many mainstream stores and is often used for its immune-boosting capabilities. It contains live cultures of bacteria that can reduce inflammation, increase antioxidant activity, and fight bacteria.

10 – Ginger

Ginger has a strong taste, and anti-inflammatory properties to go along with it. Its ability to calm an upset stomach is well known and it can also have a positive effect on your immune system.

Explanation:

this wasa  aon a website dont copy word  for word plz

3 0
2 years ago
Ammonium hydroxide is neutralized by sulfuric acid to produce ammonium sulfate and water. It will make ___ mol ammonium sulfate
Bingel [31]

Answer:

1) Ammonium hydroxide is neutralized by sulfuric acid to produce ammonium sulfate and water. It will make 0.157 mol ammonium sulfate when you neutralize 11.00 g ammonium hydroxide.

2) 2NH₄OH + H₂SO₄ → (NH₄)₂SO₄ + 2H₂O.

Explanation:

  • Firstly, we should balance the equation of heptane combustion.
  • We can balance the equation by applying the conservation of mass to the equation.
  • The balanced equation is: <em>2NH₄OH + H₂SO₄ → (NH₄)₂SO₄ + 2H₂O.</em>
  • This means that every 2.0 moles of ammonium hydroxide (NH₄OH) will produce 1.0 mole of ammonium sulfate (NH₄)₂SO₄ when it is neutralized by sulfuric acid.
  • We need to calculate the no. of moles in 11.0 g of ammonium hydroxide that is neutralized using the relation: <em>n = mass/molar mass. </em>

n of 11.0 g of ammonium hydroxide (NH₄OH) = mass/molar mass = (11.0 g)/(35.04 g/mol) = 0.314 mol.

<u><em>Using cross multiplication: </em></u>

2.0 moles of NH₄OH make → 1.0 mole of (NH₄)₂SO₄.

0.314 mol of NH₄OH make → ??? moles of (NH₄)₂SO₄.

∴ The no. of moles of (NH₄)₂SO₄ that will be made from neutralizing (11.0 g) of NH₄OH = (0.314 mol)(1.0 mol)/(2.0 mol) = 0.157 mol.

<em>∴ Ammonium hydroxide is neutralized by sulfuric acid to produce ammonium sulfate and water. It will make </em><em>0.157</em><em> mol ammonium sulfate when you neutralize 11.00 g ammonium hydroxide.</em>

3 0
3 years ago
I need 3 facts about each and similarities plz
k0ka [10]
Mitosis- asexual reproduction
Quick
for reproductive purposes

Meiosis-sexual reproduction
Takes longer
For repairing

3 0
3 years ago
Other questions:
  • Describe the structure of the beryllium atom.
    7·1 answer
  • Which of these is the best argument for switching from combustion-powered cars to fuel cell cars in order to help the environmen
    15·1 answer
  • How do vacuoles in the animal cell differ from those in the plant cell?
    14·2 answers
  • The diagram below shows the movement of Earth plates.
    5·2 answers
  • When the following equation is balanced what is the coefficient for CaCI2? Ca (s) + 2HCI (aq) —&gt; CaCI2 (aq) + H 2(g)
    9·2 answers
  • The rate constant for a particular second-order reaction is 0.47 M-1s-1. If the initial concentration of reactant is 0.25 mol/L,
    6·1 answer
  • Which characteristic do all organisms as share
    11·1 answer
  • What change occurs to an atom when it forms negative ion​
    9·2 answers
  • Oil is less dense than water. What happens when you mix the two liquids together?
    11·2 answers
  • Perform the following operation
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!