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
xeze [42]
2 years ago
13

A car is traveling 70km in 45 minutes. How many miles an hour is the car traveling?

Chemistry
1 answer:
labwork [276]2 years ago
5 0

52

Explanation:

70x45÷60= 52

I hope this is helpful

You might be interested in
Calculate the energy released when 24.8 g Na2O reacts in the following reaction
WARRIOR [948]

Answer:

hey you wanna get it right try this one: 48.0 kcal

was released... at constant pressure.

Explanation:

5 0
2 years ago
Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coeff
ahrayia [7]

Answer:

NH4Br + AgNO3 —> AgBr + NH4NO3

Explanation:

When ammonium bromide and silver(I) nitrate react, the following are obtained as shown below:

NH4Br(aq) + AgNO3(aq) —>

In solution, NH4Br(aq) and AgNO3(aq) will dissociate as follow:

NH4Br(aq) —> NH4+(aq) + Br-(aq)

AgNO3(aq) —> Ag+(aq) + NO3-(aq)

The double displacement reaction will occur as follow:

NH4+(aq) + Br-(aq) + Ag+(aq) + NO3-(aq) —> Ag+(aq) + Br-(aq) + NH4+(aq) + NO3-(aq)

NH4Br(aq) + AgNO3(aq) —> AgBr(s) + NH4NO3(aq)

6 0
3 years ago
All the elements of a family in the periodic table have what feature in common?
SCORPION-xisa [38]

They all have the same number of electrons in the electron cloud.

4 0
3 years ago
Read 2 more answers
Which of these is an isoelectronic series? question 7 options: 1) na+, k+, rb+, cs+ 2) k+, ca2+, ar, s2– 3) na+, mg2+, s2–, cl–
-BARSIC- [3]
An isoelectronic series is where all of the ions listed have the same number of electrons in their atoms. When an atom has net charge of zero or neutral, it has equal number of protons and electrons. Hence, it means that the atomic number = no. of protons = no. of electrons. If these atoms become ions, they gain a net charge of + or -. Positive ions are cations. This means that they readily GIVE UP electrons, whereas negative ions (anions) readily ACCEPT electrons. So, to know which of these are isoelectronic, let's establish first the number of electron in a neutral atom from the periodic table:

Na=11; K=19; Rb=37; Cs = 55; Ca=20; S=16; Mg=12; Li=3; Be=4; B=5; C=6, Ar = 18

A. Na⁺: 11-1 = 10 electrons
     K⁺: 19 - 1 = 18 electrons
     Rb⁺: 37-1 = 36 electrons

B. K⁺: 19 - 1 = 18 electrons
    Ca²⁺: 20 - 2 = 18 electrons
    Ar:  18 electrons
    S²⁻:  16 +2 = 18 electrons

C. Na⁺: 11-1 = 10 electrons
    Mg²⁺: 12 - 2 = 10 electrons
     S²⁻:  16 +2 = 18 electrons

D. Li=3 electrons
    Be=4 electrons
    B=5 electrons
    C=6 electrons

The answer is letter B.
6 0
3 years ago
Examine the following isotopes of silicon (Si).
Vesnalui [34]

Answer:

They all have the same number of protons but different numbers of neutrons.

Explanation:

These are called isotopes. Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.

The atomic number is the number of protons in an atom. For a neutral atom, it is the same as the number of electrons.

The mass number is the number of protons and neutrons in an atom.

silicon-28 (28Si)

silicon-29 (29Si)

silicon-30 (30Si)

All of these isotopes have an atomic number of 16

Now let us chech for the neutrons:

 Number of neutrons = mass number - atomic number:

for silicon-28 (28Si)  : 28-16 = 12 neutrons

     silicon-29 (29Si) :   29-16 = 13 neutrons

     silicon-30 (30Si):    20-16 = 14 neutrons.

6 0
3 years ago
Read 2 more answers
Other questions:
  • A container holds 800 mL of a gas at 25.0 C and 745 tore. What will be the volume of the gas of the pressure is increased to 790
    11·1 answer
  • Classify the following compounds as diatomic triatomic polyatomic molecules hc1 H2H O2 and NH3​
    6·1 answer
  • Need help <br>1/6 + 1/8 =
    9·1 answer
  • Can someone plz help me with this ​
    8·1 answer
  • What substance is acting as the Brønsted-Lowry base in the forward reaction below?
    10·1 answer
  • Will mark brainliest if correct!!
    15·1 answer
  • What do scientists use scientific notation for?
    5·2 answers
  • Draw the atomic structure with electronic configuration of Potassium​
    7·2 answers
  • A clay ball (50 degrees Fahrenheit) is placed in a bucket of water (80 degrees Fahrenheit.) which scenario describes how heat en
    11·2 answers
  • Sterling silver is a mixture of the metals silver and copper.It is used to make jewellery.sometimes sterling silver causes green
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!