CHEMISTRY HIGH SCHOOL

What is the mass of an atom that has 3 protons, 4 neutrons, and 3 electrons? 4

6

7

10

Answers

Answer 1
Answer: The mass would be 7.
Atom Mass = Number of Protons (Positive Charge) + Number of Neutrons (Neutral Charge)

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Why should hypothesis be testable?

Answers

Answer:

D. It must be testable in order to be found true or false.

APEX
When a hypothesis is testable, it means that it's possible to see whether the prediction is true or not. Testing a hypothesis can include conducting experiments, collecting data and making observations.

Can anyone please help me with this????
Please help me.

Answers

Yoooo j had this for chemistry for mr ng
The answer is 14 72 89
67 54 89 422
13 86 42
I dint have the rest
Explanation bababoey
Yes I will ok I will help you

What does newton's third law say about why momentum is conserved in collisions?A. Equal forces act in equal times, so the change in momentum for both objects must be equal.
B. Unequal forces act in unequal times, so the change in momentum for both objects must be equal.
C. Unequal forces act in unequal times, so the change in momentum for both objects must be unequal.
D. Equal forces act in unequal times, so the change in momentum for both objects must be equal.

Answers

Answer: Option (A) is the correct answer.

Explanation:

According to Newton's third law of motion, when force is exerted by one body to second body then the  second body will also exert a force equal in magnitude and opposite in direction on the first body.

For example, when we hit a wall with our leg then the wall also applies a force on our leg and thus, our leg gets hurt.

Hence, we can conclude that newton's third law says that momentum is conserved in collisions because equal forces act in equal times, so the change in momentum for both objects must be equal.
I took the test and can confirm that the answer is A.

Which two metals would react with aluminium nitrate in a displacement reaction?

Answers

Answer:

potassium and sodium

Explanation:

There are many metals that can react with  aluminium nitrate in a displacement reaction. these metals are higher than aluminium in the electrochemical series of elements where metals are arranged based on their reactivity and therefore tend to displace aluminium in any chemical reaction. However the most reactive of these metals are potassium(K) and sodium(Na). Others are calcium(Ca), magnesium(Mg), lithium(Li), strontium (Sr).
what are your choices? potassium? sodium? calcium? lithium? magnesium? add your choices please 

What is kinetic energy? A. the energy an object has due to its motion B. the energy derived from chemical reactions C. the energy an object has due to its position D. the energy an object releases as heat

Answers

Answer: Option (a) is correct.

Explanation:

When an object moves from its initial position, it acquires some energy. This energy is called kinetic energy, as it is governed by the motion of an object.

The formula to calculate kinetic energy is as follows.

                   kinetic energy = \frac {1}{2}mv^(2)

where,    

            m = mass of object

            v = velocity of object

Thus, it is concluded that kinetic energy is the energy an object has due to its motion.

The energy an object possesses due to its motion.

Which elements can form acidic compounds? Check all that apply. sulfur rubidium arsenic selenium silicon xenon antimony

Answers

The elements that can form acidic compounds are; sulfur, arsenic, selenium, antimony, silicon.

Acidic compounds are formed by nonmetals. Metallic elements form basic compounds. This means that rubidium does not form acidic compounds since it is a metal.

Also, xenon does not form compounds because it is a noble gas. Noble gases do not react with other elements to form compounds.

However; sulfur, arsenic, selenium, antimony, silicon are nonmetals and they form acidic compounds.

Learn more: brainly.com/question/14072179

The correct answer is Sulfur, Arsenic, selenium, silicon, and antimony.
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